Skip over navigation
Printable version [PDF]
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES (valves in general F16K)
Definition statement
This subclass/group covers:

Valve-gear or valve arrangements, e.g. lift-valve gear;

Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces;

Slide valve-gear or valve-arrangements;

Valve-gear or valve arrangements actuated non-mechanically;

Valve arrangements in working piston or piston-rod;

Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations;

Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups;

Slide valve-gear or valve arrangements with cylindrical, sleeve, or part annularly-shaped valves surrounding working cylinder or piston;

Slide valve-gear or valve arrangements with reciprocatory and other movement of same valve, e.g. longitudinally of working cylinder and in cross direction

Use of working pistons or pistons-rods as fluid-distributing valves or a valve-supporting elements, e.g. in free-piston machines

Valves controlled by impact by piston, e.g. in free-piston machines; Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means;

Distribution or expansion valve-gear peculiar to free-piston machines or engines;

Reversing gear Valve drive, valve adjustment during operation;

Rotary or oscillatory slide valve-gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution;

Lift valve-gear or valve arrangements specially adapted for machines or engines with variable fluid distribution

In this subclass F01L the terms "for machines or engines" are used with the meanings: "engine" means a device for continuously converting fluid energy into mechanical power; thus this term includes, for example steam piston engines or steam turbine or internal combustion engines; "machine" means a device which could equally be an engine and a pump, and not a device which is restricted to an engine or one which is restricted to a pump.

Informative references
Attention is drawn to the following places, which may be of interest for search:

In machines or engines in general, control of working-fluid admission or discharge peculiar thereto

In rotary-piston machines or engines, control of working-fluid admission or discharge

F01C21/12

In internal-combustion aspects of rotary-piston engines, valve control therefor

In positive-displacement engines driven by liquids, distributing valve-gear peculiar thereto

In positive displacement machines or pumps, self-acting distribution members

In positive displacement machines or pumps positively-driven distribution members

In positive displacement machines or pumps, actuation of distribution members

In positive displacement machines or pumps, adaptation or arrangements of distribution members

In rotary-piston pumps for liquid, control of working-fluid admission or discharge

F04C15/02

In rotary-piston pumps for elastic fluids, control of working-fluid admission or discharge

F04C29/08

Valve-gear or valve arrangements, e.g. lift-valve gear (lift-valve and valve-seat assemblies per se F01L 3/00; slide-valve gear F01L 5/00; actuated non-mechanically F01L 9/00; valve arrangements in working piston or piston rod F01L 11/00; modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations F01L 13/00)
Definition statement
This subclass/group covers:

Valve drive units, e.g. transmission between crankshaft and camshaft, camshaft arrangements, cam followers, camshaft phasers.

References relevant to classification in this group
This subclass/group does not cover:

Valve arrangements in general

Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution

Informative references
Attention is drawn to the following places, which may be of interest for search:

Lift-valve and valve-seat assemblies per se

Slide-valve gear

Actuated non-mechanically

Valve arrangements in working piston or piston rod

Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations

Valve drive (transmitting-gear between valve drive and valve F01L 1/12)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Auxiliary apparatus of engines driven by means of chains, belts or like endless members:

Safety means relating to endless members:

Driving belts, driving chains:

Gearings for conveying rotary motion by endless flexible members:

Camshaft drives indexed according to their transmission means -chain, belt, gear wheel:

Means for tensioning:

Transmitting-gear between valve drive and valve

{Chain drive}
Definition statement
This subclass/group covers:

Illustrative example

US4750455

media1.jpg

Informative references
Attention is drawn to the following places, which may be of interest for search:

Gearings for conveying rotary motion with chains

{Belt drive}
Definition statement
This subclass/group covers:

Illustrative example

US4716864

media2.png

Informative references
Attention is drawn to the following places, which may be of interest for search:

Gearings for conveying rotary motion with belts

{Gear drive}
Definition statement
This subclass/group covers:

Illustrative example

US5598630

media3.png

Camshafts
Informative references
Attention is drawn to the following places, which may be of interest for search:

Manufacturing by shaping with fluid pressure

Manufacturing camshafts

Machining camshafts

Connecting cams to shaft

By expanding and then shrinking

Using pressure fluids

Using heat or cold

Grinding

Lubrication of camshaft bearings

Rigidly coupling two coaxial shafts involving plastic deformation

Camshafts with single track cams

Characterised by their construction

overhead type
Informative references
Attention is drawn to the following places, which may be of interest for search:

Single overhead camshafts (SOHC)

Double overhead camshafts (DOHC)

Camshaft in cylinder block

Shape of cams
Informative references
Attention is drawn to the following places, which may be of interest for search:

Cams as part of gearings in general

by means of crank-or eccentric-driven rods {(F01L 1/044 takes precedence)}
Definition statement
This subclass/group covers:

Illustrative example

media4.png

Transmitting gear between valve drive and valve (simultaneously operating two or more valves F01L 1/26)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Valve arrangement comprising rollers

Tappets {(hydraulic tappets for automatically adjusting or compensating clearance F01L 1/24)}; Push rods
Informative references
Attention is drawn to the following places, which may be of interest for search:

Lubrication of tappets

Tappets for fuel pump

Preventing the rotation of tappet

Rocking arms or levers
Informative references
Attention is drawn to the following places, which may be of interest for search:

Manufacturing

Split rocking arms

Clips for retaining rocker arm on pivot

Fulcrums at upper surface

F01L1/18G

{Centre pivot rocking arms}
Definition statement
This subclass/group covers:

Illustrative example

media5.png

{the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft}
Definition statement
This subclass/group covers:

Illustrative example

media6.png

{of the boat type}
Definition statement
This subclass/group covers:

Illustrative example

media7.png

{Overhead end-pivot rocking arms}
Definition statement
This subclass/group covers:

Illustrative example

media8.png

by fluid means, e.g. hydraulically
Informative references
Attention is drawn to the following places, which may be of interest for search:

Self-contained lash adjusters

characterised by the provision of means for rotating lift valves, e.g. to diminish wear
Informative references
Attention is drawn to the following places, which may be of interest for search:

Arrangements for valve movement other than for opening or closing e.g. grinding-in, preventing sticking

characterised by the provision of means for changing the timing of the valves without changing the duration of opening {and without affecting the magnitude of the valve lift}
References relevant to classification in this subclass/group
This subclass/group does not cover:

Means for changing valve lift, which thereby change the timing of opening and the timing of closing

Informative references
Attention is drawn to the following places, which may be of interest for search:

Coupling of coaxial shafts for variable angular relationship

Gearing for varying phase

Modifying distribution valve timing

changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
Informative references
Attention is drawn to the following places, which may be of interest for search:

Gearings for variation of rotational phase between input and output shaft

Yielding couplings with means for varying the angular relationship of two coaxial shafts during motion

{using helically teethed sleeve or gear moving axially between crankshaft and camshaft}
Definition statement
This subclass/group covers:

Illustrative example

media9.png

{the helically teethed sleeve being located in the camshaft driving pulley}
Definition statement
This subclass/group covers:

Illustrative example

media10.png

{using composite camshafts, e.g. with cams being able to move relative to the camshaft}
Definition statement
This subclass/group covers:

Illustrative example

JP59183009 A

media11.png

Informative references
Attention is drawn to the following places, which may be of interest for search:

composite camshafts

{using twisted cams}
Definition statement
This subclass/group covers:

Illustrative example

JP61104112 A

media12.png

References relevant to classification in this subclass/group
This subclass/group does not cover:

If axial displacement of a three-dimensional cam modifies beyond the opening/closing timing also the valve lift

{using hydraulic chambers with variable volume to transmit the rotating force}
Definition statement
This subclass/group covers:

Illustrative example

DE19745908 A

media13.png

Informative references
Attention is drawn to the following places, which may be of interest for search:

oil control valves such as spool valves in general

solenoid actuated control valves

Details of servo motor systems for spool valves

solenoid aspects of the spool valve actuator

by means acting on timing belts or chains
Definition statement
This subclass/group covers:

Illustrative example

media14.png

Informative references
Attention is drawn to the following places, which may be of interest for search:

Means for varying tension of belts, ropes or chains

using bevel or epicyclic gear
Definition statement
This subclass/group covers:

Illustrative example

media15.png

Informative references
Attention is drawn to the following places, which may be of interest for search:

Wave gearings, harmonic drive transmission

Differential gears between crankshaft and camshaft(s) for varying timing

Gears with orbital motion

Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
References relevant to classification in this group
This subclass/group does not cover:

Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution

Valves for specific use as Exhaust Gas Recirculation valves (EGR valves) s

Informative references
Attention is drawn to the following places, which may be of interest for search:

Finishing, reconditioning valves:

Making poppet valves:

Slide valve-gear or valve-arrangements (with pure rotary or oscillatory movement F01L 7/00)
References relevant to classification in this group
This subclass/group does not cover:

Valve-arrangements with pure rotary or oscillatory movement

Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution

Rotary or oscillatory slide valve-gear or valve arrangements (slide valves with combined rotary and non-rotary movements, combinations of rotary and non-rotary slide valves F01L 5/00)
References relevant to classification in this group
This subclass/group does not cover:

Slide valves with combined rotary and non-rotary movements, combinations of rotary and non-rotary slide valves

Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution

Informative references
Attention is drawn to the following places, which may be of interest for search:

Rotary valve drives:

Valve-gear or valve arrangements actuated non-mechanically
References relevant to classification in this group
This subclass/group does not cover:

Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution

by fluid means, e.g. hydraulic
Informative references
Attention is drawn to the following places, which may be of interest for search:

Fluid pressure actuators

Boost means

F01L9/02E

by electric means
Definition statement
This subclass/group covers:

Illustrative example

DE3500530:

media16.jpg

Informative references
Attention is drawn to the following places, which may be of interest for search:

Electric actuating device, using motor

Pivoting, rectilinear armature, using motor

Linear motor

Valve arrangements in working piston or piston-rod
References relevant to classification in this group
This subclass/group does not cover:

Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution

Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
References relevant to classification in this group
This subclass/group does not cover:

Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution

Methods of controlling engine output power by varying valve lift and timing of inlet resp. exhaust valve(s), for which the emphasis is not on the structure of the valve gear used

Informative references
Attention is drawn to the following places, which may be of interest for search:

Controlling engine output power by varying valve lift and timing of inlet resp. exhaust valve(s):

Internal EGR

{Deactivating valves}
Definition statement
This subclass/group covers:

Structure of valve drive switchable to a valve deactivating mode for lost motion of the cam follower, e.g. two-part cam followers with switchable locking means there between.

References relevant to classification in this group
This subclass/group does not cover:

Methods of controlling engines by rendering engine inoperative or idling or by cutting out individual cylinders, for which the emphasis is not on the structure of the valve gear used

Cutting-out

Inoperative or idling

for braking
Definition statement
This subclass/group covers:

Structure of valve drive switchable to an engine braking mode, e.g. actuator opening exhaust valve for compression release event or cam follower switchable to a configuration to transmit to the valve the lift of a cam braking lobe.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Engine brake with retarder:

Control of engine for using engine as brake:

Control of valve gear for switching to compressor action for braking:

Braking being exclusively produced by compression in the cylinders:

In cooperation with vehicle transmission or brakes:

Valves controlled by impact by piston, e.g. in free-piston machines; {F01L 25/063 takes precedence}
Definition statement
This subclass/group covers:

valves actuated by interference with the stroke of the piston, valves ballistically driven

Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
Definition statement
This subclass/group covers:

Types of non-mechanical valve drives like for F01L 9/00, but for steam engines

Distribution or expansion valve-gear peculiar to free-piston machines or engines and not provided for in F01L 21/00 to F01L 25/00
Definition statement
This subclass/group covers:

Distribution or expansion valve-gear peculiar to free-piston machines or engines and not provided for in F01L 21/00 to F01L 25/00

Rotary or oscillatory slide valve-gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution (drive, adjustment during operation, tripping-gear, reversing-gear, use of working pistons or piston-rods as valves or as valve-supporting elements, valve-gear or valve arrangements peculiar to free-piston machines or engines F01L 15/00 to F01L 31/00)
Definition statement
This subclass/group covers:

Types of rotary or oscillatory slide valve arrangements like for F01L 7/00, but for steam engines

Informative references
Attention is drawn to the following places, which may be of interest for search:

Rotary or oscillatory slide valve-gear or valve arrangements for combustion engines

Lift valve-gear or valve arrangements specially adapted for machines or engines with variable fluid distribution (drive, adjustment during operation, tripping-gear, reversing-gear, use of working pistons or piston-rods as valves or as valve-supporting elements, valve-gear or valve arrangements peculiar to free-piston machines or engines F01L 15/00 to F01L 31/00)
Definition statement
This subclass/group covers:

Types of lift valve arrangements like for F01L 3/00, but for steam engines

Informative references
Attention is drawn to the following places, which may be of interest for search:

Lift valve arrangements for combustion engines

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013