Gearings for conveying rotary motion:

Combination of gearings.

General details of gearings.

Control of gearings.

Subclass F16H for gearings is a function-oriented place. Gearings or transmissions comprising general applicable inventions or intended for different applications are classified in this subclass. Specially adapted gearings for a particular purpose are classified in the related subclass for the application. Some examples where these gearings will be classified when specially adapted or for a particular purpose could be found in the following list of references.

The use of the available Indexing Codes in this subclass is mandatory and should be assigned for additional information to facilitate searching. The Indexing Codes under F16H 2700/00 are no longer used for classifying new documents.

Gearing with fixed gear ratio using only gears with teeth.

Toothed gearings for conveying rotary motion in which torque may be transmitted from the input to the output in only one input rotation direction, e.g. a clockwise input rotation is possible whereas a counter-clockwise input rotation is blocked.

Illustrative examples of subject matter classified in this place:

1a.

Figure 1a illustrates an example in which clockwise rotation is possible.

1b.

Figure 1b illustrates an example in which counter clockwise rotation is blocked.

2a.

2b.

Figures 2a and 2b illustrate an example in which rotation is allowed in only one direction.

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a worm drive shaft (a) and driven shaft (d) which may assume variable positions to one another, i.e. worm drive shaft (a) may pivot around driven shaft (d).

2.

Figure 2 illustrates a drive shaft (left outermost gear) and a driven shaft (right outermost gear) may assume variable positions to one another, i.e. gear train (252B) may pivot with respect to gear train (252A).

Non-orbital toothed gearing wherein no more than a total of two intermeshing members are used to convey rotary motion.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with parallel axes.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing having two parallel axes and involving only two intermeshing members (1) and (2). The latter are formed as spur gears.

2.

Figure 2 illustrates a gearing having two parallel axes and involving only two intermeshing members (1) and (2). The latter are formed as face gears.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with parallel axes, the members having helical, herringbone or like teeth.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a helical gearing having two parallel axes and involving only two intermeshing members (a) and (b). The latter having helical teeth.

2.

Figure 2 illustrates a double helical gearing having two parallel axes and involving only two intermeshing members (3) and (4). Each of the latter having two rows (1) and (2) of oppositely inclined helical teeth.

3.

Figure 3 illustrates a herringbone gearing having parallel axes (I) and (II) and involving only two intermeshing members (a1) and (a2). The latter having herringbone teeth.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with parallel axes, one of the members being internally toothed.

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing having two parallel axes and involving only two intermeshing members (1) and (2). Member (1) is internally toothed.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes.

Illustrative example of subject matter classified in this place:

1a.

Figure 1a illustrates a crown gearing involving only two intermeshing members (1) and (2). Axes (3) and (4) are intersecting and non-parallel. Gears (1) and (2) are not conical.

1b.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes, comprising spiral gears.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing involving only two intermeshing members (4) and (8), with non-parallel axes (2) and (3). Intermeshing member (4) has spiral teeth. The gearing does not have conical gears.

2.

Figure 2 illustrates a gearing involving only two intermeshing members (20) and (52), with non-parallel and intersecting axes (F) and (P). Intermeshing members (20) and (52) have spiral teeth. The gearing does not have conical gears.

3.

Figure 3 illustrates a gearing involving only two intermeshing members (1) and (2), with non-parallel and non-intersecting axes. Intermeshing members (1) and (2) have spiral teeth. The gearing does not have conical gears.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes, comprising conical gears only.

Illustrative example of subject matter classified in this place:

The Figure illustrates a bevel gearing involving only two intermeshing members, i.e. bevel gears (2) and (4). The axes thereof are non-parallel.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes, comprising conical gears only, with offset axes, e.g. hypoïd gearings.

Illustrative example of subject matter classified in this place:

The Figure illustrates a hypoïd gearing involving only two intermeshing members, i.e. conical gears (12) and (14). Axes (Og) and (Op) are offset by a distance (E), i.e. they do not intersect.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes, comprising worm and worm-wheel.

Illustrative example of subject matter classified in this place:

The Figure illustrates a worm gearing involving only two intermeshing members, i.e. worm (2) and worm-wheel (5).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes, comprising worm and worm-wheel, with balls between the co-operating parts.

Illustrative example of subject matter classified in this place:

The Figure illustrates a worm gearing involving only two intermeshing members, i.e. worm (4) and worm-wheel (8), with balls (5) between co-operating worm (4) and worm-wheel (8).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes, with members rotating around axes on the worm or worm-wheel.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a worm gearing involving only two intermeshing members, i.e. worm (12) and worm-wheel (10). Additionally, the worm gearing includes members, i.e. rollers (22), each rotating around an axis (24) on worm-wheel (10), which is perpendicular to axis (18) of worm wheel (10).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving only two intermeshing members, with non-parallel axes, the members having helical, herringbone or like teeth.

Non-orbital toothed gearing wherein the total number of intermeshing members used to convey rotary motion is greater than two intermeshing members.

Illustrative example of subject matter classified in this place:

The Figure illustrates a reduction gearing, with a fixed gear ratio, involving more than two intermeshing members, i.e. gears (2), (3), (4) and (5).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving more than two intermeshing members, with non-parallel axes.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing with a fixed gear ratio involving four intermeshing members, i.e. spur gears (20) and (22) and hypoïd gears (30) and (31). The axis of gear (31) is not parallel with the axes of gears (20), (22) and (30).

2.

Figure 2 illustrates a gearing with a fixed gear ratio involving six intermeshing bevel gears. The gearing has four non-parallel axes of rotation.

3.

Figure 3 illustrates a gearing with a fixed gear ratio involving four intermeshing members, i.e. bevel gears (4) and (300) and spur gears (7) and (8). The axis of gear (300) is not parallel with the axes of gears (4), (7) and (8).

4.

Figure 4 illustrates a gearing with a fixed gear ratio involving four intermeshing members, i.e. worm (2), worm wheel (3), and spur gears (4) and (5). The axis of worm (2) is not parallel with the axes of gears (3), (4) and (5).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving more than two intermeshing members, characterised by the driving or driven member being composed of two or more gear wheels.

Illustrative example of subject matter classified in this place:

The Figure illustrates a toothed gearing involving ten intermeshing members, i.e., gear pairs (11') and (13'), (12') and (14'), (15') and (16'), (17') and (19'), and (10') and (18'). The driving member, i.e. input shaft (1'), is composed of two gear wheels (11') and (12'). The driven member, i.e. output shaft (4'), is composed of two gear wheels (19') and (10').

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving more than two intermeshing members, with a plurality of driving or driven shafts or with arrangements for dividing torque between two or more intermediate shafts.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a toothed gearing with a fixed gear ratio and fourteen intermeshing gears. The gearing has one driven shaft (27) and two driving shafts (13) and (13').

2.

Figure 2 illustrates a toothed gearing with a fixed gear ratio and four intermeshing gears. Torque from the driving shaft is divided between two intermediate shafts and summed at the driven shaft.

Toothed gearings for conveying rotary motion, with fixed gear ratio, without non-parallel axes, without gears having orbital motion, involving more than two intermeshing members, with a plurality of driving or driven shafts or with arrangements for dividing torque between two or more intermediate shafts, with non-parallel axes.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a toothed gearing with a fixed gear ratio and intermeshing gears (1), (2), (3), (4), (1'), (2'), (3'), and (4'). The gearing includes a driving shaft 6 and two driven shafts (5) and (5'). Torque flows from driving shaft (6) via bevel gears (1) and (2), internal gear (3) and external gear (4) to driven shaft (5); and from driving shaft (6) via bevel gears (1') and (2'), internal gear (3') and external gear (4') to driven shaft (5').

2.

Figure 2 illustrates a toothed gearing with a fixed gear ratio and eight intermeshing gears. Torque from driving shaft (1) is divided between intermediate shafts (12) and (13) and summed at driven shaft (2).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving more than two intermeshing members, with a plurality of driving or driven shafts or with arrangements for dividing torque between two or more intermediate shafts, with two or more worm and worm-wheel gearings.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a toothed gearing with a fixed gear ratio and four intermeshing gears. The gearing includes a driven shaft (1) and three driving worm shafts (2), (3) and (7).

2.

Figure 2 illustrates a toothed gearing with a fixed gear ratio and seven intermeshing gears. Torque from the driving shaft, i.e. worm shaft (1), is divided between intermediate worm shafts (7) and (6) and summed at driven shaft (2).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving more than two intermeshing members, with a plurality of driving or driven shafts or with arrangements for dividing torque between two or more intermediate shafts, comprising two or more gearwheels in mesh with the same internally toothed wheel.

1.

Figure 1 illustrates a toothed gearing with a fixed gear ratio and six intermeshing gears. The gearing includes two driving shafts (5) and a driven shaft (8). Both gearwheels (3) are in mesh with the same internally toothed wheel (2a).

2.

Figure 2 illustrates a toothed gearing with a fixed gear ratio and four intermeshing gears. Torque from driving shaft (16) is divided between intermediate shafts (36) and (37) and summed at internally toothed gear (21), which forms the driven shaft. Gearwheels (26) and (31) mesh with the same internally toothed wheel (21).

3.

Figure 3 illustrates a toothed gearing with a fixed gear ratio and four intermeshing gears. Torque from driving shaft (121) is divided between intermediate shafts (140) and summed at internally toothed gear (131), which forms the driven shaft. Gearwheels (132) mesh with the same internally toothed wheel (131).

Toothed gearings for conveying rotary motion, with fixed gear ratio, without gears having orbital motion, involving gears essentially having intermeshing elements other than involute or cycloidal teeth.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing with a fixed gear ratio and without gears having orbital motion. Rollers (5) of gear (2) mesh with semi-circular grooves (4) of gear (1). In other words, the gearing includes intermeshing elements which are neither involute nor cycloidal teeth.

Special means compensating for misalignment of axes of toothed gearings for conveying rotary motion, with fixed gear ratio, and without gears having orbital motion.

Illustrative example of subject matter classified in this place:

The Figure illustrates a toothed gearing comprising a pair of spur gears (6) and (10), driving shaft (6), and driven shaft (8). The gearing includes a spherical bearing formed on the drive shaft (8) in order to compensate for the misalignment of the axes associated with shafts (6) and (8), respectively.

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion.

Illustrative example of subject matter classified in this place:

The Figure illustrates an orbital or planetary gearing comprising sun gear (4), orbital or planet gears (5), ring or internal gear (6) and planet carrier (7). Input shaft (1) is connected to sun gear (4), output shaft (2) is connected to planet carrier (7), and ring gear (6) is fixed to housing (3). Planet gears (5) rotate around their own axis. In addition, due to rotation of the planet carrier (7), planet gears (5) also orbit relative to and around rotating sun gear (4), i.e. they have orbital motion.

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, with means for equalising the distribution of load on the planet gears.

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, with means for equalising the distribution of load on the planet-gears, by allowing limited movement of the ring gear relative to the casing or shaft.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planetary gearing with a ring gear (2) connected to casing (5) via an elastically deformable wave element (16). The latter allowing limited movement of ring gear (2) relative to casing (5).

2.

Figure 2 illustrates a planetary gearing with a ring gear (3) connected to casing (7) via pins (5) and roller elements (6a) and (6b), thereby allowing limited movement of ring gear (3) relative to casing (7).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, with means for equalising the distribution of load on the planet-gears, by allowing limited movement of the planet carrier, e.g. relative to its shaft.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gearing with planet carrier (13) connected to output shaft (17) by double-tooth clutch (15) which is axially biased by spring (18). This connection allows a limited axial movement of planet carrier (13) relative to output shaft (17).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, with means for equalising the distribution of load on the planet-gears, by allowing limited movement of the planet gears relative to the planet carrier or by using free floating planet gears.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planet gear (36) is rotatably mounted to planet carrier (38) via a planet bearing (63), a sleeve (56) and a flex-pin (40). Flex-pin (40) allows limited movement of planet gear (36) relative to planet carrier (38).

2a.

2b.

Figures 2a and 2b illustrates an example in which planet gears (6) are each rotatably mounted to planet carrier (3) by planet pins (12). Planet pins (12) may freely float within slits (11) in planet carrier (3).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, with means for equalising the distribution of load on the planet-gears, by allowing limited movement of the sun gear.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gearing including sun gear (9) connected to casing (10) via an elastically deformable wave element (24). The latter allowing limited movement of sun gear (9) relative to casing (10).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, involving conical gears.

Illustrative example of subject matter classified in this place:

The Figure illustrates a reduction gearing (40) including input shaft (31), output shaft (36), non-rotating housing (24) and bevel planet gear (42), i.e. a conical gear, having orbital motion.

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, arrangements for adjusting or for taking-up backlash.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gearing including ring gear (5) having two parts (5') and (5''), which are rotated against each other to reduce the backlash between the teeth of the planet gears (3) and the teeth of the ring gear (5).

Planetary gearing having a fixed gear ratio and including three central gears which are all engaged with the same planet gear, and the planet gear is mounted on an idling carrier.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gearing with a fixed gear ratio and including three central gears, i.e. sun gear (2) and two ring gears (3) and (4), which are all engaged by a common orbital gear (6) mounted on carrier (5). Carrier (5) is not connected to any shaft and therefore idles. In other words, carrier (5) constitutes an "idling carrier".

Planetary gearing having a fixed gear ratio and including at least two axially spaced central gears which are both engaged with the same planet gear, and one of the at least two axially spaced central gears is the output for the gearing.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gearing with a fixed gear ratio and including two axially spaced central gears, i.e. ring gears (5) and (7), which are both engaged by a common orbital gear (3) and (3'). Ring gear (7) forms the output of the gearing.

Planetary gearings falling within the scope of both F16H 2001/2872 and F16H 2001/2881, are classified in F16H 2001/2872 only.

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, comprising two or more coaxial and identical sets of orbital gears, e.g. for distributing torque between the coaxial sets.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gearing with a fixed gear ratio and comprising a first set of planet gears (25) and a second set of planet gears (25'). The two sets of planet gears (25) and (25') are coaxial and identical.

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, in which an orbital gear is a worm; or in which the orbital gear has helical teeth and an axis crossing the main axis of the gearing.

This area also includes gearing in which the orbital gear has helical teeth and where the axis of the orbital gear is set at an angle relative to the main axis.

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a planetary gearing, with a fixed gear ratio, comprising four orbital gears (9), each of which is a worm.

2a.

2b.

Figures 2a and 2b illustrate a planetary gearing comprising three orbital gears (16), each of which has helical teeth and an axis (17) set at an angle α relative to the main axis (18).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. eccentric gearing or cycloidal gearing.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planetary gear set in which orbital gears (9) and (9') are nutating.

2.

Figure 2 illustrates a planetary gear set in which orbital gears (9) and (11) are nutating.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planetary gear set including an input crank (b), an output (f), an eccentric orbital gear (d) and a flexible coupling (g).

2.

Figure 2 illustrates a gearing including a planetary gear set having carrier (5) with mounted orbital gears (11) interacting with sun gear (3). The gearing further includes universal joints (28), (33) attached to the output of the planetary gear set.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a planetary gear set (1) includes an eccentric crankshaft (10) driven by input shaft (8), eccentric orbital gears (14a), (16a) driven by eccentric crankshaft (10) and output shaft (4).

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gear set including eccentric input shaft (F), axially spaced and rigidly interconnected eccentric orbital gears (B), (D) and output shaft (C).

Orbital gearing in which the orbital movement of the orbital gears is transferred eccentrically around the main axis of the gearing by carrier pins interacting with circular holes, e.g. cycloid gearings.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a planetary gear set including input shaft (11), ring gear (20), eccentric orbital gears (30) and (40), carrier (50), sun gear (71) and output shaft (12). Pins (51) in carrier (50) guide orbital gears (30) and (40) in an eccentric motion via holes (32) and (42).

Orbital gearing in which the orbital movement of the orbital gears is transferred eccentrically about the main axis of the gearing by linear guiding means. The linear guiding means include means that allow radial movement in two orthogonal directions, e.g. an Oldham coupling.

Illustrative example of subject matter classified in this place:

1a.

Figure 1a illustrates a gearing comprising input crankshaft (10), output shaft (50) and orbital gears (30). The rotation of each of the orbital gears (30) around its own axis (30a), which is eccentric to center axis (40a), is converted into rotation of output shaft (50) around center axis (40a). Linear guiding means (70), in the form of a cross, allows radial movement in two orthogonal directions of orbital gears (30).

1b.

1c.

1d.

The eccentrically driven orbital gear has internal gear teeth.

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a planetary gear set (20) including input crankshaft (21), orbital gear (24), (25), reactionary ring gear (22) and output shaft (27). Orbital gear (24), (25) includes external teeth (24a) and internal teeth (25a).

2a.

2b.

2c.

Figures 2a, 2b and 2c illustrate a planetary gear set including input crankshaft (2a), orbital gear (6), sun gear (9) and output shaft (10). Orbital gear (6) has internal teeth (7).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a planetary gear set including a crankshaft (1) with balancing means (11), orbital gear (9), reactionary ring gear (10) and output (2).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, involving gears essentially having intermeshing elements other than involute or cycloidal teeth.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planetary transmission, with fixed gear ratio, having intermeshing elements, i.e. teeth (7), (8) and (9), which are neither involute nor cycloidal teeth.

2a.

Figure 2a illustrates an eccentric gearing, with fixed gear ratio, having intermeshing elements, i.e. teeth in form of pins (36), which are neither involute nor cycloidal teeth.

2b.

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, with two central gears coupled by intermeshing orbital gears.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary transmission, with fixed gear ratio, comprising two central gears, i.e. sun gear (2) and ring gear (3), coupled by two intermeshing orbital gears (4a) and (4b).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, consisting of a plurality of gear trains each with orbital gears and having three or more central gears.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a planetary transmission, with fixed gear ratio, comprising two gear trains (1) and (2) having altogether four central gears, i.e. sun gears (S1) and (S2) and ring gears (R1) and (R2). First gear train (1) has a single orbital gear (P1). Second gear train (2) has a pair of intermeshing orbital gears (P2) and (P3).

Toothed gearings for conveying rotary motion, with fixed gear ratio, with gears having orbital motion, e.g. eccentric gearing or cycloidal gearing, and with special means compensating for misalignment of axes, e.g. for equalising distribution of load on the face width of the teeth.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a planetary transmission, with a fixed gear ratio, comprising two gear trains (101) and (103), each respectively comprising one set of orbital gears (109) and (125). Figure 1a illustrates a misalignment of the main axes of gear trains (101) and (103). Sun gear (111), sun gear shaft (129) and planet carrier (123) of Figure 1a are replaced with sun gear (201), sun gear shaft (207) and planet carrier (213) in order to compensate for the misalignment which are illustrated in Figure 1b. This results in a more equally distributed load on the face width of the teeth of the sun gear (201), ring gear (105) and planet gears (109).

Gearings with variable gear ratio or reversing motion using only gears with teeth.

Gearings which are convertible when not being operated such that, after the conversion, a different gear ratio is provided. In other words, convertible does not mean shiftable during operation.

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing having an input shaft (21) and an output shaft (22). The gear ratio can be varied by converting the gearing outside of operation. This conversion is done by mounting output shaft (22) to a different one of gears (11-17). Thereby, different output gears are selected which result in different gear ratios.

2.

Figure 2 illustrates a gearing having an input shaft (5) and an output shaft (9). The gear ratio is varied from forward to reverse by converting the gearing as follows: the distance ring (13) is removed from its position between the casing body (1) and the lower lid (14) and is interposed between the casing body (1) and the upper lid (15). Thereby output shaft (9) is axially displaced so that input bevel gear (6) now meshes with lower output bevel gear (12) instead of upper output bevel gear (7) and the sense of rotation of the output shaft (8) being thereby reversed.

3.

Figure 3 illustrates a gearing including gear pair (56 and 58) which transfers torque during operation. Two replacement gear pairs (70 and 72) and (74 and 76) are stored in a chamber. When not in use, the gearing may be converted by substituting gear pair (56 and 58) with one of the two replacement gear pairs (70 and 72) and (74 and 76). This conversion varies the gear ratio.

Illustrative example of subject matter classified in this place:

1a.

Figure 1a illustrates a gearing with a variable gear ratio including conical ring gear (6) meshing with gears (24), (25), (26), (27) and (28). Each of gears (24), (25), (26), (27) and (28) has teeth (29) which are radially moveable in and out of mesh with the teeth of conical ring gear (6).

1b.

Toothed gearings in which the gear ratio is changed by inversion of torque, such that regardless of whether an input shaft changes rotation between clockwise and counter-clockwise, the output shaft always rotates in the same direction. For example, toothed gearing in which clockwise rotation of an input shaft results in clockwise rotation of an output shaft and a gear ratio of 1, and counter-clockwise rotation of the input shaft results in clockwise rotation of the output shaft and a gear ratio of -1.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing with a variable gear ratio including an input shaft (2000) and an output shaft (3000). When input shaft (2000) rotates clockwise, output shaft (3000) rotates clockwise. When input shaft (2000) rotates counter-clockwise and output shaft (3000) rotates clockwise.

2a.

2b.

Figures 2a and 2b illustrate a gearing with a variable gear ratio including an input shaft (131) and an output shaft (133). Due to freewheels (151) and (153) the flow path and, thus the gear ratio, is changed when the direction of rotation of input shaft (131) is changed. The direction of rotation of output shaft (133) remains the same.

Parallel selectable power or torque flow paths between the input and the output of the gearing, e.g. dual clutch transmissions.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a toothed gearing including parallel torque flow paths selectively created between input (10a) and output (15a) by clutches (K1a) and (K2a).

2.

Figure 2 illustrates a toothed gearing including parallel torque flow paths selectively created between input (AN) and output (AB) by clutches (K1) and (K2).

Illustrative example of subject matter classified in this place:

The Figure illustrates a six-speed transmission with two parallel flow path (10) and (12). Flow path (12) is directly connected to input (16) via first input shaft (14), and flow path (10) is connected to input (16) via clutch (27) and second input shaft (20).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a transmission with two parallel flow paths via countershafts (CNT1) and (CNT2), and means (ST1) and (ST2) for selectively driving countershafts (CNT1) and (CNT2).

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission, without gears having orbital motion, with internally toothed gears (6).

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission without gears having orbital motion, comprising three worms (4a), (4b) and (4c) with different pitches, which may be engaged with gear (2) by being axially moved on input shaft (3). Thereby two forward speeds and one reverse speed are provided for output shaft (1).

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission without gears having orbital motion with only continuously meshing gears, e.g. (G06) and (G16) always meshing. The gears of the transmission can be disengaged from their shafts, e.g. gear (G16) can be disengaged from shaft (PIS) via coupling (PS2).

In this group, gears which can be put out of mesh are not taken into consideration if they are used for reversal only.

Illustrative example of subject matter classified in this place:

The Figure illustrates a four-speed transmission having an input shaft (14) and an output shaft (16) as well as a countershaft (32) which is coaxial to input shaft (14).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates an eight-speed transmission without gears having orbital motion, comprising idle gears (5) and (6) which are axially couplable to each other by shift element (I), which changes the gear ratio.

2.

Figure 2 illustrates a multi-speed transmission without gears having orbital motion, including idle gears (33) and (34) which may be axially coupled to each other by engaging clutch (38), in order to transfer power.

Illustrative example of subject matter classified in this place:

The Figure illustrates a four-speed transmission having an input shaft (1) and a coaxial output shaft (3). It uses unsynchronised clutches (9), (11) and (12).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a multi-speed transmission comprising means for power-shifting, by using bypass clutches (51) and (52).

2.

Figure 2 illustrates a multi-speed transmission comprising means for power-shifting, by using friction clutches (CT1) to (CT6).

Illustrative example of subject matter classified in this place:

The Figure illustrates a six-speed-transmission comprising a reverse shaft (48), two reverse gears (42) and (46) and a reverse clutch (44).

Illustrative example of subject matter classified in this place:

1a.

1b.

1c.

1d.

Figures 1a, 1b, 1c and 1d illustrate a multi-speed transmission without gears having orbital motion. Gear (Lo) on the output shaft is used for the (1^st) and (3^rd) forward speeds and gear (2) on the input shaft is used for the (2^nd) and (6^th) forward speeds.

Illustrative example of subject matter classified in this place:

The Figure illustrates a three-speed transmission including balls (2) as radially acting clutching members. By axially moving sliding key (1), the three balls (2) are selectively radially moved into engagement with their respective idle gear.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts, e.g. gears (I), (II) and (III). The transmission comprises two output shafts (7) and (12). It is noted that differential casing (9) is not considered an output shaft.

When counting the countershafts, the reverse countershaft is not taken into consideration if it is used for reversal only.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises an input shaft (10) and an output shaft (20) which are parallel to each other. The transmission does not include a countershaft. It is noted that reverse countershaft (30), which is used for reversal only, is not counted as a countershaft, per the Note in F16H 3/087. It is further noted that differential casing (71) is not considered an output shaft, since the differential is not part of the multi-speed transmission.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, including a single countershaft.

Illustrative example of subject matter classified in this place:

The Figure illustrates a six-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises an input shaft (19) and an output shaft (22), which are parallel to each other, as well as a single countershaft (24). It is noted that reverse countershaft (40), which is used for reversal only, is not counted as a countershaft, per the Note in F16H 3/087. It is further noted that differential casing (15) is not considered an output shaft, since the differential is not part of the multi-speed transmission.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, including a single countershaft, with coaxial input and output shafts.

Illustrative example of subject matter classified in this place:

The Figure illustrates a four-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises an input shaft (15) and output shaft (16), which are coaxial to each other, as well as a single countershaft (17).

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with two or more countershafts.

Illustrative example of subject matter classified in this place:

The Figure illustrates a six-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises an input shaft (10), an output shaft (50) and two countershafts (20) and (30). It is noted that the differential housing (GFN) is not considered an output shaft, since the differential is not part of the multi-speed transmission.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with two or more countershafts, each countershaft having an output gear meshing with a single common gear on the output shaft.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a multi-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises an input shaft (10), output shaft (11) and two countershafts (12) and (13). Countershafts (12) and (13) comprise output gears (26) and (33), respectively, meshing with a single common gear (27) on the output shaft.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with two or more countershafts, with coaxial countershafts.

Illustrative example of subject matter classified in this place:

The Figure illustrates a five-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises an input shaft (1) and an output shaft (4) as well as two coaxial countershafts (2) and (5).

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with two or more countershafts, in which all or two or more of its countershafts comprising only one idle gear and one gear fixed to the respective countershaft.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises four countershafts (28), (13), (17) and (22). Countershafts (28), (13) and (22) each include only one idle gear and one gear fixed to the respective countershaft. It is noted that reverse countershaft (R), which is used for reversal only, is not counted as a countershaft, per the Note in F16H 3/087.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with two or more countershafts, in which all or two or more of its countershafts comprising only two idle gears and one gear fixed to the respective countershaft.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises input shaft (15), output shaft (38), and five countershafts (16), (17), (18), (19) and (37), each of which comprises only two idle gears and one gear fixed to the respective countershaft. It is noted that reverse countershaft (39), which is used for reversal only, is not counted as a countershaft, per the Note in F16H 3/087.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with two or more countershafts, with multiple gears on the input shaft directly meshing with respective gears on the output shaft.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises an input shaft (Sm), an output shaft (Sc), and two countershafts (Ss1) and (Ss2). Gears (31), (48), and (50) on input shaft (Sm) are directly meshing with respective gears (32), (52), and (53) on output shaft (Sc). It is noted that differential casing (26) is not considered an output shaft.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. Torque is simultaneously transmitted via both countershafts (14) and (16), i.e. torque is evenly distributed from the input shaft (32) to both countershafts (14) and (16).

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with two or more countershafts, the input and output shafts being aligned on the same axis.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises two countershafts (4) and (6). It further comprises an input shaft (3) and an output shaft (1) which are coaxial.

Illustrative example of subject matter classified in this place:

The Figure illustrates a three-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises three one-way clutches (5a), (6a), and (7a) in addition to three friction clutches (5b), (6b) and (7b). During a shift of the transmission, the one-way clutches (5a), (6a), and (7a) allow an off-going friction clutch to remain engaged for a brief time while an on-coming friction clutch engages.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears that can be disengaged from their shafts, with means for synchronisation not incorporated in the clutches, using a brake.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission comprises a brake (26) which is engaged during upshifts in order to reduce the speed of input shaft (2).

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts, with means for synchronisation not incorporated in the clutches, using an electric drive.

Illustrative example of subject matter classified in this place:

The Figure illustrates a six-speed transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission uses electric motor (29) as means for synchronisation.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission without gears having orbital motion and including continuously meshing gears that can be disengaged from their shafts. The transmission includes one forward speed via meshing gears (3) and (4), and one reverse speed via meshing gears (7), (8) and (10).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a transmission without gears having orbital motion. The transmission includes bevel gears (2) and (3) which are continuously meshing with gear (6). This allows bevel gears (2) and (3) to rotate in opposite directions. Bevel gears (2) and (3) can be disengaged from shafts (12a) and (12b), respectively, as shaft assembly (7) is moved axially.

In this group, gears which can be put out of mesh are not taken into consideration if they are used for reversal only.

In this group, gears which can be put out of mesh are not taken into consideration if they are used for reversal only.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially using gears that can be moved out of gear, with gears shiftable only axially, with driving and driven shafts coaxial.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion. The transmission includes an input shaft (2) and an output shaft (3), which is coaxial to input shaft (2). Each of gears (19), (20) and (21) is axially shiftable such that they can be moved in and out of gear.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, without gears having orbital motion, exclusively or essentially using gears that can be moved out of gear, with gears shiftable only axially, with driving and driven shafts not coaxial.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion. The transmission includes an input shaft (1) and an output shaft (2), which is not coaxial to input shaft (1). Each of gears (3), (4), (5), (6), (17), (18), (19) and (20) is axially shiftable such that they can be moved in and out of gear.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion. The transmission includes an input shaft (3) and an output shaft (5). Each of gears (9) and (10) is shiftable in a circumferential direction such that they can be moved in and out of gear.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a multi-speed transmission without gears having orbital motion. The transmission includes coaxial gears (16a-16k) have conical teeth and are arranged on a surface of generally conical shape.

2.

Figure 2 illustrates a multi-speed transmission without gears having orbital motion. The transmission includes coaxial gears (18), which do not have conical teeth, but are arranged on a surface of generally conical shape.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission without gears having orbital motion. The transmission includes three coaxial gears arranged on flat disc-type surface (12) which engage with the gear on (16).

Illustrative example of subject matter classified in this place:

1a.

1b. Forward gear

1c. Reverse gear

Figures 1a-1c illustrate a multi-speed transmission without gears having orbital motion. The transmission includes one forward gear (Figure 1b) and one reverse gear (Figure 1c). Gears (21) and (22) may be moved in and out of mesh with output gear (12) when pivotable lever (23) is pivoted around the axis of input shaft (9).

Illustrative example of subject matter classified in this place:

1a. Transmission without gears having orbital motion and providing a continuously variable gear ratio (top view)

1b. Transmission without gears having orbital motion and providing a continuously variable gear ratio (side view)

Figures 1a and 1b illustrate a transmission with gears (A) and (B) having teeth (19) that are arranged for obtaining multiple gear ratios.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission without gears having orbital motion and providing a continuously variable gear ratio with gear teeth (4) arranged on a conical surface.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission without gears having orbital motion and providing a continuously variable gear ratio. The teeth of gear 1 are arranged on a flat disc-type surface.

Variable or reverse gearing including two or more orbital gear sets arranged in or near a single plane, e.g. in a stacked formation radially outward from the gearing main axis.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed transmission including orbital gear set (P2) which is stacked radially outward of orbital gear set (P1).

Illustrative example of subject matter classified in this place:

The Figure illustrates a two-speed transmission including orbital gears (7a) and (7b), i.e. gears having orbital motion. Due to clutches (12a) and (12b) there is no permanent connection to input shaft (2).

Illustrative example of subject matter classified in this place:

The Figure illustrates a two-speed transmission including orbital gears (7a) and (7b), i.e. gears having orbital motion. Due to clutches (12a) and (12b) there is no permanent connection to output shaft (14).

Illustrative example of subject matter classified in this place:

The Figure illustrates a two-speed planetary transmission including two central gears, i.e. left bevel gear (165) and right bevel gear (160), connected by orbital conical gears (155) and (170).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planetary transmission which can be shifted between neutral and a single speed. It consists of only two central gears, i.e. externally toothed sun gear (10) and internally toothed ring gear (4), connected by rigidly connected orbital spur gears (11a) and (11b) (also often called a stepped planet).

2.

Figure 2 illustrates a two-speed planetary transmission consisting of only two central gears, i.e. externally toothed sun gear (P11a) and internally toothed ring gear (P13a), connected by single orbital spur gear (P14a).

Illustrative example of subject matter classified in this place:

The Figure illustrates a two-speed planetary transmission consisting of two central gears, i.e. sun gear (6) and sun gear (8), connected by orbital spur gears (12) and (13) (also often called a stepped planet).

Illustrative example of subject matter classified in this place:

The Figure illustrates a two-speed planetary transmission consisting of two central gears, i.e. sun gear (114) and ring gear (122), connected by two intermeshing orbital gears (118) and (120).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a transmission including only two central gears (22) and (33) and orbital bevel gears (41). The transmission provides only a forward gear ratio and a reverse gear ratio.

Orbital gear transmissions composed of gear trains having a single connection to pass the drive from one train to another.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed planetary transmission having five planetary gear trains (62), (28), (28), (28), (28), ten central gears, i.e. five sun gears and five ring gears, and five sets of orbital gears, one for each (planetary) gear train. Torque always passes from the gear train (62) to the first gear train (28) via a single connection, from the first gear train (28) to the second gear train (28) via a single connection. No two gear trains are connected by more than one connection, and torque always flows through all the gear trains.

Orbital gear transmissions composed of gear trains having multiple connections between gear trains to pass the drive from one train to another via different paths between gear trains.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed planetary transmission having four planetary gear trains (RS1), (RS2), (RS3), (RS4), eight central gears, i.e. four sun gears and four ring gears, and four sets of orbital gears, one for each planetary gear train. Torque passes through different planetary gear trains depending on clutch engagement. Further, there are multiple connections between gear trains (RS2) and (RS3) depending on clutch engagement.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed planetary transmission including two planetary gear trains (20) and (21) and having multiple connections between the two gear trains to pass the drive from one train to another via different paths. Planetary gear train (21) is a Ravigneaux set comprising sun gear (S2), sun gear (S3) and ring gear (R2) (i.e., three central gears). Ravigneaux set (21) further comprises a long orbital gear (26) consisting of a left and a right orbital gear which are fixedly connected to each other and which have the same diameter. Ravigneaux set (21) also comprises orbital gear (25) which meshes with the orbital gear on the right side of long orbital gear (26) to form a pair of intermeshing orbital gears. Planetary gear train (20) is a planetary gear train having two intermeshing orbital gears (23A) and (23B) which are not axially spaced from each other.

Illustrative example of subject matter classified in this place:

The Figure illustrates a multi-speed planetary transmission having four planetary gear trains (R1S1), (RS2), (RS3) and (RS4) and eight central gears, i.e. sun gears (S01), (S02), (S03) and (S04) and ring gears (H01), (H02), (H03) and (H04). Each of the planetary gear trains (RS1) and (RS2) has two intermeshing orbital gears making them planetary gear trains. In other words, orbital gears (PLa1) and (PLi1) of planetary gear train (RS1) are intermeshing, and orbital gears (PLa2) and (PLi2) of planetary gear train (RS2) are intermeshing.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary transmission including two orbital worm gears (26) and (32), the axes (24) and (30) thereof crossing the main axis (12) of the transmission.

Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion, using gears having orbital motion, in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. eccentric gearing or cycloidal gearing.

Orbital gear transmissions with an energy dissipating device used to vary the speed of the transmission, e.g. a regulating brake.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planetary gear transmission including regulatory brake (BK101). Regulatory brake (BK101) dissipates energy in the gearing in order to vary the speed of transmission output shaft (S102).

2.

Figure 2 illustrates a planetary gear transmission including main drive (2) and auxiliary drives (3.1) and (3.2). The auxiliary drives can vary the speed of the gearing continuously. Additionally, retarder (12) dissipates energy in the gearing in order to vary the speed of the gearing.

Orbital gear transmissions with a fluid throttle as an energy dissipating device, in order to vary speed in the transmission continuously.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary gear transmission including planet carrier (6), pump (11), fluid circuit (12) and fluid throttle (13). Energy of planet carrier (6) is dissipated by the resistance of fluid circuit (12), which is continuously varied by fluid throttle (13), in order to vary the speed of transmission output shaft (3).

Planetary transmissions with at least one externally powered electric machine as a secondary drive, in order to vary speed continuously.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary transmission comprising an externally powered electric machine (5) as a secondary drive which continuously varies the speed of output shaft (22).

Planetary transmissions with at least one externally powered electric machine as a secondary drive used to vary speed continuously, and with means to change the ratio in the mechanical gearing.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary transmission comprising an externally powered motor/generator (MG) as a secondary drive which continuously varies the speed of output shaft (W₂). The transmission further includes brake (B), one-way clutch (FL) and clutch (K) to change the ratio in the mechanical gearing.

Planetary transmissions with at least two dynamo electric machines as a secondary drive for creating an electric power path inside the gearing. For example, planetary transmission including a generator and motor which provide a variable power torque path in the gearing, and an electric power path between the generator and the motor.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a planetary transmission with an electric variator as a secondary drive. The electric variator consists of two dynamo electric machines (17) and (22), one working as motor and the other as generator, with an electrical power path between the two.

2.

Figure 2 illustrates a planetary transmission with an electric variator as a secondary drive. The electric variator consists of two dynamo electric machines (70) and (72). When one machine works as a motor and the other as a generator, an electrical power path is created between the two (via electrical circuits 78 and 80 and battery 82).

Planetary transmissions with at least two dynamo electric machines as a secondary drive for creating an electric power path inside the gearing. For example, a planetary transmission including a generator and motor which provide a variable power torque path in the gearing, and an electric power path between the generator and the motor, and the transmission further including means to change ratio in the mechanical gearing.

Illustrative example of subject matter classified in this place:

The Figure illustrates a planetary transmission with an electric variator as a secondary drive. The electric variator consists of two dynamo electric machines (82) and (85). When one machine works as a motor and the other as a generator, an electrical power path is created between the two (via electrical circuits B and battery 86). The transmission further comprises clutch (60) to change the ratio in the mechanical gearing.

Complexes, using orbital gears, but not using actuatable speed-changing or regulating members.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a transmission comprising a sun gear, a ring gear and a set of orbital gears. The interaction between the teeth of the orbital gears and the roller teeth of the ring gear provides a continuously variable gear ratio.

Special adaptation of synchronisation mechanisms to gearings having orbital motion for conveying rotary motion with variable gear ratio or for reversing rotary motion.

Illustrative example of subject matter classified in this place:

The Figure illustrates a two-speed planetary transmission having a synchro-mesh dog clutch consisting of a clutch sleeve (26), dog teeth (38) and a synchroniser ring (36).

Belts drives, chain drives or rope drives with a fixed ratio, and tensioning mechanisms and guiding means used in such systems. Also including ways or tools to mount the belt, chain or rope on the pulley or sprocket.

Only transmission layout of belt or chain or rope drives for conveying rotary motion with variable gear ratio or for reversing rotary motion.

Transmissions where a belt is axially squeezed between two sheaves of at least one pulley.

Gearing where rotary motion is transferred with a fixed ratio by the friction of the surfaces of members in the gearing, where the surfaces are pressed to each other.

Transmission layout of transmissions where rotary motion is transferred with a variable ratio by the friction of the surfaces of members where the surfaces are pressed to each other.

Only transmission layout of conveying rotary motion with a continuously variable ratio by friction between rotary members that are not using flexible endless members and where the rotary members are not in planetary motion, examples of this group are toroidal transmission or friction ring transmissions.

Illustrative example of subject matter classified in this place:

The Figure illustrates a continuously variable friction gearing including input shaft (124), output shaft (170), and orbital friction balls (160).

Gearings for converting limited rotary movement, e.g. oscillation, into another rotary movement or a limited rotary movement into reciprocating movement or vice versa, e.g. by using flexible friction means, or rack and pinion mechanisms.

Gearings for converting reciprocating movement into another reciprocating movement, e.g. by flexible means.

Illustrative example of subject matter classified in this place:

The Figure illustrates a friction gearing comprising rollers (8) and (9) attached to belts (10) and (11). The belts (10) and (11) allow the gearing to convey limited rotary motion, i.e. oscillating motion.

Illustrative example of subject matter classified in this place:

The Figure illustrates a friction gearing comprising input belt (6), output belt (3) and pulley (12). The gearing converts the reciprocating input motion of belt (6) into a reciprocating output motion of belt (3).

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission comprising gears (11) and shaft (22), which frictionally engage. Rotation of shaft (22) results in an axial movement of the carrier (24).

Gearings comprising screw mechanisms for conveying or interconverting oscillating or reciprocating motions are covered by F16H 25/20. This classification place covers similar gearings with the difference that a frictionally engaging shaft is used instead of a threaded shaft.

Mechanisms including flexible members, where the output movement is half or double compared with the movement of the input.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a transmission including rotary motor (1) and output (6). Motor (1) drives frame (3) along a linear track (5). The frame is coupled to output (6) via belts (7), (7'). Movement of frame (3) along a distance (1/2) creates movement of output (6) along a distance (l).

2.

Figure 2 illustrates a transmission including piston (2) and output (11). Piston (2) provides input to belt (9) by movement back and forth in cylinder (3). Belt (9) engages rollers (10) and is connected to output (11), such that movement of the piston (2) is doubled at output (11).

Mechanisms including flexible members, where the differential effect by using at least one drum or pulley with different diameters is creating the reciprocating movement.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission including rotary input (11) and reciprocating output (17b). Rotation of the belt (15) around pulleys (16a) and (16b) of different diameter create the reciprocating output movement of output (17b).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a transmission including input pinion (14) and output toothed rack (10). Pinion (14) drives toothed belt (11) which engages with toothed rack (10).

2.

Figure 2 illustrates a transmission including rotary input (24) and output toothed rack (60). Input (24) drives belt (40) which engages toothed rack (60).

Mechanisms where the on-winding and off-winding on a drum or thread create axial movement parallel to the drum or thread.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission including rotary input (11) and reciprocating output (13). Winding and unwinding of thread (29) converts the rotary motion of input (11) to axial movement of output (13).

Mechanisms where oscillating movement is converted into reciprocating movement perpendicular to the axis of oscillation or vice versa, e.g. by on-winding and off-winding a flexible member on a drum or pulley.

Illustrative example of subject matter classified in this place:

The Figure illustrates a transmission including an input stepped motor (7) and an output carriage (2). Motor (7) drives pulley (6) which engages with belt (5). Movement of belt (5) causes axial movement of carriage (2). The axial movement of carriage (2) is perpendicular to the axis of the stepped motor (7).

Mechanisms where oscillating movement is converted by on-winding and off-winding of a flexible member on a drum into reciprocating movement perpendicular to the axis of oscillation.

Illustrative example of subject matter classified in this place:

1.

Figure 1 illustrates a transmission including oscillating input (12) and reciprocating output (22). Input (12) causes winding and unwinding of belt (20) at different ends, which causes reciprocating movement of output (22) perpendicular to the input motion.

2.

Figure 2 illustrates a transmission including oscillating input (26) and reciprocating output (14). Input (26) causes winding and unwinding of belt (16) at different ends, which causes reciprocating movement of output (14) perpendicular to the input motion.

3.

Figure 3 illustrates a transmission including oscillating input (11) and reciprocating output (71). Input (11) causes winding and unwinding of belts (51) and (61) at different ends, which causes reciprocating movement of output (71) perpendicular to the input motion.

Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion, whereby the gearings are for interconverting rotary (or oscillating) motion and reciprocating motion and comprise a flexible member, the flexible member being a non-buckling chain.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a transmission including two belts (1, 1') and rotary pinions (15, 15', 17), and (17') engaging the belts. Buckling of the belts (1, 1') is prevented by interlocking teeth (2, 2').

2.

Figure 2 illustrates a transmission including belt (110) and rotary pinions (240) engaging the belt. Buckling of the belt (110) is prevented by interlocking teeth (112).

Toothed or friction gearing not capable of conveying indefinitely-continuing rotary motion for converting rotary or oscillating motion and reciprocating motion, comprising a flexible push member which includes a stiffness capable of creating a pushing force.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a transmission including flexible member (3) and rotary output (5). A pushing force on member (3) causes rotation of member (5).

2a.

2b.

Figures 2a and 2b illustrate a gearing including rotary input pinion (308) and output (404). Rotation of pinion (308) causes flexible member (401) to wind around drum (403), causing the drum (403) and output (404) to move linearly. Flexible member (401) includes a stiffness capable of creating a pushing force in section (406).

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including input worm (10) engaging with flexible rack cable (6). Sheath (7) acts as guiding means for the cable (6).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing where rotation of the top disc causes flexible members to move bottom disc axially.

2.

Figure 2 illustrates a gearing including discs (32) and (38) and flexible members (36). Rotation of disc (32) creates reciprocating movement of disc (38).

3.

4.

Figure 4 illustrates a gearing including discs (20) and (22) and flexible members (24). Rotation of disc (20) creates reciprocating movement of disc (22).

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including rotational input (11) and reciprocating output (13). Twisting movement of flexible member (12) causes the reciprocating movement of output (13), which modifies the axial length of the gearing as a whole.

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including input from motor (84) and telescoping pipes (81, 82 and 83). Motor (84) causes rotation of screw (85), which causes rotation of pulley (86). Rotation of pulley (86) causes axial displacement of pipes (81, 82 and 83) via a chain.

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including rotary input (12) and reciprocating output (20). A spring is included for tensioning the flexible member (16).

Example:

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including rotary input (930) and reciprocating output (900). The flexible member (910) forms a closed loop (i.e. the flexible member is endless).

Illustrative example of subject matter classified in this place:

1a.

1b.

1c.

Figures 1a, 1b and 1c illustrate a gearing including rotary inputs (64 and 74), block (30) slidable in both the vertical (Z) and horizontal (R) directions, flexible member (56) and moveable output (18). Actuation of the gearing allows output (18) to be moved to a specific location on the (R-Z) plane.

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including rotary input from motor (61) and output (51). Actuation of the gearing generates a pivoting movement at (50) for output (51).

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including input (4), links (7) and (8), and output (6). Links (7) and (8) guide element (6).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing comprising input member (185) and output member (187). Crank pin (104) is fixed on rotary member (185) and guided in a first long hole of member (202), crank pin (106) is fixed on rotary member (187) and guided in a second long hole of member (202). Counter-clockwise rotation of rotary input member (185) is conveyed to clockwise rotation of rotary output member (187) via reciprocating motion of member (202).

Gearings comprising primarily only links or levers, with or without slides, crank gearings or eccentric gearings, for interconverting rotary motion and reciprocating motion, all movement being in, or parallel to, a single plane, with adjustment of throw.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a crank gearing comprising primarily only links and levers for converting rotary motion of the crank shaft (1) into reciprocating motion of the piston (13) which functions as a guided slide. Crankshaft (1) comprises an oblique crank pin (9). The throw, i.e. the length of the reciprocating motion of piston (13), is adjusted by moving crankshaft (1) in a different axial position. The axial movement of crankshaft (1) between a minimum and maximum throw is shown by arrow (7).

2.

Figure 2 illustrates a crank gearing comprising primarily only links and levers for converting rotary motion of the crank shaft (18) into reciprocating motion of the piston (13) which functions as a guide slide. The throw, i.e. the length of the reciprocating motion of piston (13), is adjusted by moving pivot (12) to a different position.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a crank gearing comprising primarily only links or levers for converting rotary motion of crank shaft (21) into reciprocating motion of piston (14) which functions as a guided slide via connecting rod (7). The crank gearing does not comprise any further links or guides in addition to the one connecting rod (7) and one guided slide (14).

Crank gearings or eccentric gearings comprising primarily only links or levers, for interconverting rotary motion and reciprocating motion. All movement is in, or parallel to, a single plane, with one connecting-rod and one guided slide to each crank or eccentric. The gearing includes joints or levers which may toggle, or move, between two locations.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a crank gearing comprising primarily only links or levers for converting rotary motion of crank shaft (11) into reciprocating motion of piston (1) which functions as a guided slide. Crank pin (8) moves along groove (6), such that groove (6) functions as a cam. Connecting rod (7) is guided by crosshead (12) functioning as an additional guide.

2.

Figure 2 illustrates a crank gearing comprising primarily only links or levers for converting rotary motion of the crank shaft into reciprocating motion of the piston which functions as a guided slide. The gearing further includes a crosshead a functioning as an additional guide.

3a.

3b.

Figures 3a and 3b illustrate a crank gearing comprising primarily only links or levers for converting rotary motion of crank shaft (k) into reciprocating motion of piston (b) which functions as a guided slide. Pin (d) at the lower end of connecting rod (c) interacts with a cam (g) as well as a long hole (h) which also functions as a cam of crank arm (i).

Illustrative example of subject matter classified in this place:

The Figure illustrates a crank gearing for converting rotary motion of one crank shaft (4) into reciprocating motion of one piston (1) (guided slide) via one connecting rod (21) and by using gears (24) and (25) as members having rolling contact.

Illustrative example of subject matter classified in this place:

The Figure illustrates a crank gearing comprising primarily only links and levers for converting rotary motion of crank shaft (A) into reciprocating motion of piston (F) which functions as a guided slide. Crank pin (B) is connected to connecting rod (F-E) via additional pivoted links (B-C), (C-E) and (G-E).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a crank gearing comprising primarily only links or levers for converting rotary motion of crank shaft (S) into reciprocating motion of two pistons (P), which two pistons function as guided slides. Two respective connecting rods (2') and (4') are connected to a single crank (14).

2.

Figure 2 illustrates a crank gearing including primarily only links or levers for converting rotary motion of a crank shaft (9) into reciprocating motion of five pistons (6), which pistons function as guided slides. Five respective connecting rods (10) are connected to a single crank (9).

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate an eccentric gearing including a crankshaft (11), eccentric member (9), rod (6) and piston (13). Rotary motion of crankshaft (11) with eccentric member (9) is converted into reciprocating motion of piston (13) which functions as a guided slide. Rod (6) moves only linearly and does not swing.

2.

Figure 2 illustrates a crank gearing including primarily only links or levers for converting rotary motion of the crank shaft into reciprocating motion of the piston functioning as a guided slide. The crank pin is running in a cam-like slot, which generates a slot-and-crank motion. The connecting rod does not swing.

Illustrative example of subject matter classified in this place:

1a.

Figure 1a illustrates an eccentric gearing including a crank (10), (12), (13) which rotatably carries orbital gear (19), and further including ring gear (14), rod (21) and piston (8). Rotary motion of crank (10), (12), (13) and orbital gear (19) is converted into reciprocating motion of piston (8) which functions as a guided slide. Rod (21) moves only linearly and does not swing. The orbital gearing includes a ratio of 2:1 between the ring gear (14) and the orbital gear (19).

1b.

Gearings using rotating wobble plates or discs for converting rotary movement into a reciprocating movement of a gear member.

Gearings comprising primarily only cams and cam followers for conveying rotary motion.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a cam gearing comprising only sphere (1) with a cam groove and disc (5) with cam follower pin (6). Rotary motion (4) of sphere (1) causes rotary motion (7) of disc (5).

2.

Figure 2 illustrates a screw-and-nut gearing (10) comprising only nut (12) and circular screw (14). Rotary motion (R1) of nut (12) causes rotary motion (R2) of circular screw (14).

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a cam gearing comprising rotary input (90) and rotary output (100). Balls (80) engage opposite cam discs, e.g. discs (110 and 112).

2.

Figure 2 illustrates a cam gearing comprising a rotary input and rotary output. Balls (9) and (10) engage opposite cam discs (1) and (2).

Gearings comprising primarily only cams and cam followers for interconverting rotary motion and reciprocating motion.

Note: When reversing reciprocating motion, input rotary motion (which is defined as indefinitely continuous rotary motion) would cause an automatic reversal of the reciprocating motion. If the input rotational direction is changed in order to cause reversal of the reciprocating motion, the input motion is an oscillating motion (which is defined as alternately forward and backward rotary motion).

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing comprising only a cam (7) and a cam follower (12). Rotary motion of shaft (5) is converted into reciprocating motion of rod (14) see arrows (15) via the cam (7) and cam follower (12).

Gearings comprising primarily only cams and cam followers for interconverting rotary motion and reciprocating motion, with adjustable throw.

Illustrative example of subject matter classified in this place:

1a.

1b.

1c.

Figures 1a, 1b and 1c illustrate a gearing comprising only a cam (38) and a cam follower (42). Rotary motion of cam (38) is converted into reciprocating motion of cam follower (42). The throw (i.e. the length of the reciprocating motion), is adjusted by axially moving axially tapered cam (38).

Gearings comprising primarily only cams and cam followers for interconverting rotary motion and reciprocating motion, with reciprocation occurring in a direction along the axis of rotation. It is noted that "reciprocation along the axis of rotation" can be reciprocating movement either on or parallel to the axis of rotation.

Illustrative examples of subject matter classified in this place:

1a.

Figure 1a illustrates a gearing comprising only a cam shaft (4) and a cam follower (12). Rotary motion of the input shaft (see arrow 8) is converted into reciprocating motion of output shaft (14) (see arrow F, s). The reciprocation is along and coaxial to the axis of rotation (10). The gearing comprises wave-type profiles (22) and (24) for the cam.

1b.

2.

Figure 2 illustrates a gearing comprising only a cam (14) and a cam follower (9). Rotary motion of shaft (17) is converted into reciprocating motion of sledge (6) (see arrow 7). The reciprocation is along and parallel to the axis of rotation. The gearing includes helical projection (14).

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing comprising only a cam shaft (3) and a cam follower (1). Rotary motion of cam shaft (3) is converted into reciprocating motion of output (6). The reciprocation is along and parallel to the axis of rotation. Cam shaft (3) has an endless helical groove (4) which provides an automatic reversal of output (6) via cam follower (1).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing comprising only a cam shaft (4) and a cam follower (5). Rotary motion of shaft (2) is converted into reciprocating motion of shaft (3). The reciprocation is along and coaxial to the axis of rotation. Cam shaft (4) includes a cam provided on an end surface of rotary cam shaft (4).

Illustrative example of subject matter classified in this place:

1a.

Figure 1a illustrates a gearing comprising a gearing comprising a fixed base (11), cam shafts (22), (23) and (24), a cam follower comprised of apertures (A-M) and an output shaft (12). Reciprocating motion of each of the cam shafts (22), (23) and (24) is induced by respective solenoids (29). This motion is converted into rotary motion of output shaft (12) see arrow (30) via lateral force (39). The reciprocation is along and parallel to the axis of rotation.

1b.

1c.

Gearings comprising primarily only cams and cam followers for interconverting rotary motion and reciprocating motion, with reciprocation occurring in a direction perpendicular to the axis of rotation.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing comprising only a cam (22) and a cam follower (20). Rotary motion of cam (22) is converted into reciprocating motion of cam follower (20). Reciprocation is perpendicular to the axis of rotation of the cam (22).

2a.

2b

Figures 2a and 2b illustrate a gearing comprising only a cam (38) and a cam follower (36). Rotary motion of cam shaft (32) is converted into reciprocating motion of piston (122). Reciprocation is perpendicular to the axis of rotation of cam shaft (32).

Gearings comprising primarily only cams and cam followers for interconverting rotary motion and oscillating motion.

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing comprising primarily only a cam (h) and a cam follower (i). Rotary motion of shaft (d) is converted into oscillating motion of lever (a) and output shaft (b).

It is noted that the gearing comprises a single lever (a). However, the primary functioning of the gearing consists of a cam and cam follower, and the presence of a single lever is not sufficient to consider the gearing as more than primarily cams and cam followers.

Gearings comprising primarily only cams and cam followers, for conveying or interconverting oscillating or reciprocating motions.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing comprising only a cam (12) and a cam follower (23). Oscillating motion of cam (12) is converted into reciprocating motion (31) and (33) of shaft (22).

2.

Figure 2 illustrates a gearing comprising primarily only a cam (11) and a cam follower (16). Oscillating motion of shaft (7) is conveyed into oscillating motion of lever (4).

It is noted that the gearing comprises a single lever (4). However, the primary functioning of the gearing consists of a cam and cam follower, and the presence of a single lever is not sufficient to consider the gearing more than primarily cams and cam followers.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing comprising cams in the form of wedges. A horizontal reciprocating movement of the lower wedge is conveyed into a vertical reciprocating movement of the upper wedge.

2.

Figure 2 illustrates a gearing comprising cams in the form of wedges (10), (12) and (14). A horizontal reciprocating movement of wedges (10) and (12) in opposite directions is conveyed into a vertical reciprocating movement of wedge (14).

3.

Figure 3 illustrates a gearing comprising cams in the form of wedges (9), (7) and (8). A reciprocating horizontal movement of wedge (9) is conveyed into reciprocating horizontal movement of wedge (8) via ball (1) and wedge (7).

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing comprising only cam shaft (4a) and cam follower (5a), which convert oscillating motion of input (11) to reciprocating motion of output (2). Reciprocating motion of output (2) is along the axis of oscillation of input (11).

2.

Figure 2 illustrates a gearing comprising only cam (2) and cam follower (3), which convert reciprocating motion of input (1) to oscillating motion of output (4). Reciprocating motion of output (4) is along the axis of oscillation of input (1).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a gearing comprising primarily only a screw-and-nut mechanism. Rotation of screw (6) results in linear movement of nut (8).

2.

Figure 2 illustrates a gearing comprising primarily only a screw-and-nut mechanism. Rotation of nut (23) results in linear movement of screw (40). It is noted that the gearing comprises a simple set of toothed gears (20). However, the primary functioning of the gearing consists of the screw and nut, and the presence of a simple set of gears is not sufficient to consider the gearing more than primarily a screw-and-nut mechanism.

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing comprising primarily only a screw-and-nut mechanism. Guide members (16) move along guide surface (15) of the housing (2) to support and guide the nut (4).

2.

Figure 2 illustrates a gearing comprising primarily only a screw-and-nut mechanism having a nut (3) and a rotatable screw (53). Nut (3) comprises axial sliding means in the form of flat surfaces which slide on axial guide surfaces (86) and (87) of housing (81), thereby preventing rotation of nut (3) while at the same time allowing its axial movement.

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing comprising primarily only a screw-and-nut mechanism having screws (22) and (32) engaging nuts (24) and (34), respectively. Nuts (24) and (34) are connected to each other and have opposite thread directions. Common rotation of nuts (24) and (34) results in opposite linear movement of screws (22) and (32).

2.

Figure 2 illustrates a gearing comprising primarily only a screw-and-nut mechanism having screws (31) and (32) engaging nuts (41) and (42) respectively. Screws (31) and (32) are connected to each other and have opposite thread directions. Common rotation of screws (31) and (32) results in opposite linear movement of nuts (41) and (42).

This group and subgroup F16H 25/2204 are only given if the subject-matter of the cooperating parts, e.g. the circulating balls are of particular interest representing the invention information. If the ball screw device is just an additional feature invention classification is given in group F16H 25/20.

Mechanisms which include movement in a stepwise, or step-by-step, manner such that an output member is alternately moving and at rest during continuous motion of an input member.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a step-by-step mechanism having a reciprocating rod (14) as an input member. Reciprocating movement of rod (14) and its attached pin (13) creates a step-by-step rotary movement of output member (1). During reciprocating movement of rod (14), output member (1) is at rest until the pin (13) arrives at groove surface (10b), as shown in illustration (A) and (B). When pin (13) impacts groove surface (10b) it forces output member (1) to rotate, as shown in illustration (C). Rotation of output member (1) stops when pin (13) arrives at groove surface (10c). Thereafter, during the continued reciprocating movement of rod (14) and its pin (13), output member (1) is again at rest. Continuous reciprocation of rod (14) results in a stepwise rotation of output member (1).

2.

Figure 2 illustrates a gearing including a rotary input gear (2) with interrupted toothing (8a) and (8b) and a reciprocating rack (3) as an output member. Continuous rotation of input gear (2) results in a stepwise linear movement of rack (3).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a gearing including a rotary input member (30) with a helical rib (38) having tracks (39) and (40), and a rotary output member (35) with cam followers (36) which interact with tracks (39) and (40). Continuous rotation of input member (30) is converted into a step-by-step rotation of output member (35). When one of the followers (36) engages with a straight section of helical rib (38), output member (35) is at rest. When one of the followers (36) engages with an oblique section of helical rib (38), the helical rib (38) drives follower (36) such that output member (35) is rotated about an angle of 45°. Thus, the continuous rotation of input member (30) results in a stepwise rotation of output member (35).

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including rotary input shaft (Δ1) and rotary output shaft (Δ2). Continuous rotation of input shaft (Δ1) is converted into a step-by-step rotation of output shaft (Δ2). When driving pin (13) is within one of driven slots (1210), (1220), (1230) or (1240), output shaft (Δ2) is rotated about an angle of 90°. When driving pin (13) is outside of any driven slot, output shaft (Δ2) is at rest. Thus, the continuous rotation of input shaft (Δ1) results in a stepwise rotation of output shaft (Δ2). This type of gearing is considered a Geneva drive.

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including a rotary input gear (2) with interrupted toothing (8) and a rotary output gear (3). Continuous rotation of input gear (2) results in a stepwise rotation of output gear (3).

Gearings for conveying continuous rotary motion into a rotary output motion by using intermittently-driving members, e.g. with freewheel action:

Gearings for conveying rotary motion from an input shaft to rotary motion of an output shaft, and including intermittently driving members, e.g. members with freewheel action. The intermittently driving members are located between one of the input and output shafts and an oscillating or reciprocating intermediate member. The intermittently driving members do not rotate with either of the input or output shafts.

Illustrative example of subject matter classified in this place:

1a

1b.

Figures 1a and 1b illustrate a crank CVT including a rotary driving shaft (4), a rotary driven shaft (5), an adjustable eccentric (6), several cranks (8) and a freewheel clutch (7) between each of the cranks (8) and the driven shaft (5). Each crank (8) is considered an oscillating intermediate member, which does not rotate with either the drive shaft (4) or driven shaft (5). Each freewheel clutch (7) is regarded as an intermittently-driving member between each of the cranks (8) and driven shaft (5).

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing including levers (13) arranged between rotary driving shaft (1) and rotary driven shaft (5). Each lever (13) drives the driven shaft (5) only if it is the lever closest to teeth (7). Thus, each lever drives only intermittently and is considered as an intermittently-driving member between driving shaft (1) and driven shaft (5).

Illustrative example of subject matter classified in this place:

1a.

1b.

Figure 1a illustrates a gearing including a driving shaft (20), a driven shaft (24) and levers (25). Each lever (25) drives the driven shaft (24) only if it is the lever closest to teeth (21). Thus, each lever drives only intermittently and is considered as an intermittently driving member between driving shaft (20) and driven shaft (24). The transmission ratio is changed by adjustment of the distance (eccentricity) between driving shaft (20) and driven shaft (24). Figure 1b illustrates a transmission ratio different from 1:1, while Figure 1a illustrates a transmission ratio of 1:1.

Gearings with freewheeling members or other intermittently-driving members for converting oscillating, i.e. non-continuous rotary input, or reciprocating movement into another movement, e.g. a step-by-step mechanism including a freewheel member.

Mechanisms converting oscillating or reciprocating motion to rotary motion (or vice versa), which include movement in a stepwise, or step-by-step, manner such that an output member is alternately moving and at rest during continuous motion of an input member.

Step-by-step mechanisms for rotary motion including an intermittently driving member, wherein the intermittently driving member includes pawls driven by a rotary cam.

Step-by-step mechanisms for rotary motion including an intermittently driving member, wherein the intermittently driving member includes pawls driven by a reciprocating or oscillating transmission member.

Step-by-step mechanisms for rotary motion including an intermittently driving member, wherein the intermittently driving member includes friction means.

Mechanisms for linear motion which include movement in a stepwise, or step-by-step, manner such that an output member is alternately moving and at rest during continuous motion of an input member.

Step-by-step mechanisms for linear motion including an intermittently driving member, wherein the intermittently driving member includes friction means.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a toothed gearing including a pair of spur gears (1) and (2) which are eccentrically mounted.

2.

Figure 2 illustrates a rack and pinion gearing having a pinion (4) which is eccentrically mounted.

3.

Figure 3 illustrates a belt-type transmission having a pulley (7) which is eccentrically mounted.

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a toothed gearing including two non-circular gears (13) and (14).

2.

Figure 2 illustrates a toothed gearing including non-circular gear (3).

3.

Figure 3 illustrates a belt-and-pulley transmission including two non-circular pulleys.

Illustrative example of subject matter classified in this place:

The Figure illustrates a gearing with a no-back mechanism consisting of an axially movable friction member (10). Friction member (10) and helical gear (13) are fixed to shaft (9). Only when torque is applied from output shaft (24), i.e. backdriving of the gearing, shaft (9) is axially moved by the axial force of helical gear (13) towards brake area (11), thereby pressing friction member (10) against brake area (11) of housing wall (4). This causes braking of shaft (9) and prevents backdriving of output shaft (24).

Illustrative examples of subject matter classified in this place:

1.

Figure 1 illustrates a worm gearing consisting of a worm (11) and a worm wheel (15). The worm wheel (15) includes end stops (21) with noses (22), which stop movement after a few turns of worm (11).

2a.

2b.

2c.

Figures 2a, 2b and 2c illustrate a toothed gearing including three spur gears (15), (16) and (17). Spur gear (17) comprises an end stop (18) which stops movement after a few turns of spur gear (15).

Gearings or mechanisms that include means to vary the rotational phase relationship, e.g. gearings that include means to vary the angular relationship between the input and the output shaft.

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a toothed gearing (28) including input shaft (30), output shafts (32) and (34), and planetary gearing (38). The rotational phase relationship between output shafts (32) and (34) is adjusted by rotating ring gear (40) via worm (48) about an angle which corresponds to the desired phase relationship between shafts (32) and (34).

2.

Figure 2 illustrates a chain-type gearing including input sprocket (30), output sprocket (62), tensioner sprocket (64) and sprocket (40). The rotational phase relationship between input sprocket (30) and output sprocket (62) is adjusted by varying the position of sprocket (40).

Illustrative examples of subject matter classified in this place:

1a.

1b.

Figures 1a and 1b illustrate a toothed gearing including input shaft (2) and output gear (3). Rotary motion of input shaft (2) is conveyed via elliptic gears (11a) and (11b), thereby varying the velocity ratio during any single revolution of elliptic gears (11a) and (11b), such that the velocity ratio is varied cyclically.

2a.