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CPC Definition - Subclass B66C

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Last Updated Version: 2021.01
B66C
CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES ({specially adapted for lifting invalids A61G 7/10;} rope, cable, or chain winding mechanisms, braking or detent devices therefor B66D; specially adapted for nuclear reactors G21)
References
Limiting references

This place does not cover:

Devices for lifting patients or disabled persons

A61G 7/10

Toy cranes

A63H 17/12, A63H 33/3044

Devices for carrying objects by hand

B65G 7/12

Special rules of classification

The following IPC groups are not used in this classification scheme.

Subject matter of these groups is classified in the following groups: 

IPC B66C23/61 classified in B66C 23/60 

IPC B66C23/683 classified in B66C 23/68 

IPC B66C23/687 classified in B66C 23/701 

IPC B66C23/69 classified in B66C 23/701 

IPC B66C23/693 classified in B66C 23/705 

IPC B66C23/697 classified in B66C 23/707

The scheme includes entry B66C 23/54, for which no corresponding IPC exists. Subject matter should be given an IPC classification in B66C 23/68

Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles (fastening to cables or ropes F16G 11/00)
Special rules of classification

Documents should be classified in the lowest subgroup possible and only classified in higher groups if none of the subgroups is applicable. If necessary documents should be classified in multiple subgroups. All non-trivial technical features should be classified. Main groups should only be used when no appropriate subgroup exists.

by suction means {(suction cups for attaching purposes F16B 47/00)}
References
Limiting references

This place does not cover:

Work holders

B25B 11/005

Robots with suction lifting devices

B25J 15/0616

Feed or transfer devices

B65G 47/91

Conveying fragile sheets

B65G 49/061

Separating articles from piles

B65H 3/0808

Suction cups for attaching purposes

F16B 47/00

{for handling bulk or bags}
Definition statement

This place covers:

See for example US2007/0130884

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{Circular shape}
Definition statement

This place covers:

suction means with a circular shape

See for example EP 1 775 243

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{Safety measures, e.g. sensors, duplicate functions}
Definition statement

This place covers:

Arrangements for ensuring correct vacuum level or preventing load from falling if vacuum is lost.

{Hand held}
Definition statement

This place covers:

Devices where the weight of the load is supported by the operator.

See for example US 2 212 755

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Relationships with other classification places

Also classified in B65G 7/12

{Special lip configurations}
Definition statement

This place covers:

Devices where the edge of the suction cup has a particular arrangement, for example a shape.

See for example US 1 426 930

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{Multiple lifting units; More than one suction area}
Definition statement

This place covers:

This group not used, devices classified in following two subgroups.

{Separate cups}
Definition statement

This place covers:

Devices where the suction cups are separated from each other by the mounting and/or piping arrangement.

See for example US 1 426 692

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{Divided cups}
Definition statement

This place covers:

Devices where the suction cup is a single unit with separated vacuum areas.

See for example EP 1 118 578

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{Operating and control devices}
Definition statement

This place covers:

General control arrangements not covered by the following three subgroups.

{for rotation}
Definition statement

This place covers:

Devices for rotating the load being lifted.

See for example US 4 696 613

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{Venturi effect}
Definition statement

This place covers:

Devices where the vacuum is created using venturi or bernouilli principle.

See for example GB 1 396 737

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{actuated by lifting action}
Definition statement

This place covers:

Devices where the action of lifting the device creates the vacuum between the load and the suction cup.

See for example US 7 543 868

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{Rectangular or square shape}
Definition statement

This place covers:

suction means with a rectangular shape

See for example US 3 506 297

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{Other shapes, e.g. triangular or oval}
Definition statement

This place covers:

Shapes which are neither circular nor rectangular or are non-planar.

See for example US 4 084 306

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{Single lifting units; Only one suction cup}
Definition statement

This place covers:

Devices with only a single vacuum area.

See for example US 4 413 853

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by magnetic means
Definition statement

This place covers:

Lifting devices with permanent magnets.

References
Limiting references

This place does not cover:

Work holders

B25B 11/002

Robots with magnetic lifting devices

B25J 15/0608

Feed or transfer devices

B65G 47/92

Separating articles from piles

B65H 3/16

Lifting devices with both electromagnets and permanent magnets

B66D 1/06

Informative references

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

Permanent magnets for lifting or picking up

H01F 7/0257

electromagnetic
References
Informative references

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

Electromagnets for lifting or transporting magnetic material

H01F 7/206

Circuits therefor (for electromagnets in general H01F 7/18)
References
Informative references

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

Circuits for electromagnets in general

H01F 7/18

by mechanical means
Definition statement

This place covers:

mechanical load engaging devices not covered by one of the following subgroups

See for example US 5 800 000

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{for containers (B66C 1/223 and B66C 1/663 take precedence)}
Definition statement

This place covers:

Lifting devices for containers.

See for example US 2008/0292440

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References
Limiting references

This place does not cover:

Connectors, e.g. twistlocks, for connecting a lifting device to a container

B66C 1/663

{for two or more containers end to end}
Definition statement

This place covers:

See for example US 2009/0278368

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{for two or more containers side by side}
Definition statement

This place covers:

See for example EP 1 857 401

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{Lifting beam permitting to depose a load through an opening}
Definition statement

This place covers:

Devices where the load support is not directly under the crane hook, to allow the load to be deposited to one side.

See for example US 7 017 963

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{for lifting engines}
Definition statement

This place covers:

Load supporting devices for lifting engines.

See for example US 3 995 903.

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References
Limiting references

This place does not cover:

Manually movable cranes for lifting engines

B66C 23/485

{for lifting parts of wind turbines}
Definition statement

This place covers:

Load supporting devices for wind turbine parts.

See for example US 2009/0025219.

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References
Limiting references

This place does not cover:

Cranes for lifting wind turbines

B66C 23/185

Slings comprising chains, wires, ropes, or bands; Nets (article side grippers suspended by ropes or chains from crane hooks B66C 1/42)
Definition statement

This place covers:

Slings not covered by one of the following subgroups.

Devices where a sling is suspended from a platform.

References
Limiting references

This place does not cover:

Devices where a platform is suspended from a sling

B66C 1/16

Construction of cables or slings

D07B 1/00

{Sling or load protectors}
Definition statement

This place covers:

Devices for protecting the sling from damage.

See for example US 4 039 218

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References
Limiting references

This place does not cover:

Devices for protecting the load

B65D 71/04

{Chain-type slings (chains in general F16G)}
Definition statement

This place covers:

Lifting chains connecting the load to the lifting device

See for example US 2 989 287

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References
Limiting references

This place does not cover:

Chains with hook for attaching to load

B66C 1/14

General chains

F16G

{Nets}
Definition statement

This place covers:

See for example US 3 142 507

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Slings with hooks
Definition statement

This place covers:

Chains or slings with hooks to attach to load.

See for example US 4 017 111

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References
Limiting references

This place does not cover:

Chains with hook for attaching to chain link to form a loop around load

B66C 1/125

Devices for lifting barrels

B66C 1/625

Slings with load-engaging platforms or frameworks
Definition statement

This place covers:

Devices where a platform is suspended from a sling.

See for example US 4 831 967

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References
Limiting references

This place does not cover:

Devices where a sling is suspended from a platform

B66C 1/12

Band-type slings
Definition statement

This place covers:

Slings with a flat cross-section.

See for example US 2008/0277952

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References
Limiting references

This place does not cover:

Straps for attaching loads e.g. to trucks

B60P 7/0823

Construction of cables or slings

D07B 1/22

specially adapted for handling vehicles
Definition statement

This place covers:

See for example US 4 232 893

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Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
Definition statement

This place covers:

See for example US 3 010 751

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{for containers}
Definition statement

This place covers:

Rigid lifting devices for lifting a container from below

See for example US 5 649 805

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References
Limiting references

This place does not cover:

Lifting (e.g. from above) using twistlocks

B66C 1/663

{for flexible intermediate bulk containers [FIBC]}
Definition statement

This place covers:

See for example US 2005/0199650

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Single members engaging the loads from one side only
Definition statement

This place covers:

See for example US 2006/0175850

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with means for releasing the loads
Definition statement

This place covers:

See for example US 1 777 119

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Duplicate, e.g. pivoted, members engaging the loads from two sides
Definition statement

This place covers:

See for example US 5 066 189

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and also arranged to grip the sides of the loads
Definition statement

This place covers:

See for example US 3 001 812

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of piled or stacked articles
Definition statement

This place covers:

See for example US 2 670 985

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Crane hooks
Definition statement

This place covers:

See for example US 2011/0011818

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with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads
Definition statement

This place covers:

See for example US 2009/0049663

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adapted for automatic disengagement from loads on release of cable tensions (for parachutes {B64D 17/00})
Definition statement

This place covers:

Hooks where the load is automatically released when the load is lowered.

See for example US 5 292 165

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References
Limiting references

This place does not cover:

Non-automatic release arrangements

B66C 1/34

formed or fitted with load measuring or indicating devices
Definition statement

This place covers:

Load measurement on the hook.

See for example US 2010/0037700

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References
Limiting references

This place does not cover:

Load measurement elsewhere on crane

B66C 13/16

Gripping members engaging only the external or internal surfaces of the articles (for handling or stripping castings or ingots during manufacture B22D 29/00)
Definition statement

This place covers:

Gripping members not relying on friction to hold load, e.g. where the shape of the device ensures sufficient hold.

References
Limiting references

This place does not cover:

Gripping members for particular articles

B66C 1/62

{actuated by lifting force (B66C 1/44, B66C 1/58 take precedence)}
Definition statement

This place covers:

See for example US 5 842 729

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{motor actuated (B66C 1/44, B66C 1/58 take precedence)}
Definition statement

This place covers:

See for example US 2 226 789

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{by hydraulic or pneumatic motors}
Definition statement

This place covers:

Devices using fluid motors or cylinders.

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and applying frictional forces
Definition statement

This place covers:

Gripping members relying on friction to hold load.

{actuated by lifting force}
Definition statement

This place covers:

See for example US 5 280 982

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{motor actuated}
Definition statement

This place covers:

See for example US 5 997 064

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{by hydraulic or pneumatic motors}
Definition statement

This place covers:

See for example US 5 209 536

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by inflatable elements
Definition statement

This place covers:

See for example US 3 219 382

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to vertical edge portions of sheets, tubes, or like thin or thin-walled articles (internally-expanding grippers B66C 1/54)
Definition statement

This place covers:

See for example US 2009/0218836

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{Coil lifting devices}
Definition statement

This place covers:

See for example US 4 253 696

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References
Limiting references

This place does not cover:

Lifting coils using magnets

B66C 1/04

Lifting coils using internal grippers

B66C 1/54

Internally-expanding grippers for handling hollow articles (B66C 1/46 takes precedence)
Definition statement

This place covers:

See for example US 5 971 457

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for handling tubes
Definition statement

This place covers:

See for example US 2 778 671

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and deforming the articles, e.g. by using gripping members such as tongs or grapples
Definition statement

This place covers:

See for example US 3 695 670

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{Log grapples}
Definition statement

This place covers:

See for example US 6 315 344

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Tongs for sacks
Definition statement

This place covers:

See for example US 4 648 646

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comprising article-engaging members of a shape complementary to that of the articles to be handled
Definition statement

This place covers:

See for example US 5 158 416

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{for gripping drums or barrels}
Definition statement

This place covers:

devices gripping drums or barrels either by their body or edges

See for example US2010/0140968

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for T- or I-section beams or girders
Definition statement

This place covers:

See for example US 4 371 203

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for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
Definition statement

This place covers:

Devices such as lifting rings or pins lifting via holes in object being lifted

See for example US 7 014 230

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{for containers (fastening of containers on vehicles B60P 7/13, B60P 7/132)}
Definition statement

This place covers:

Devices such as twistlocks, which connect a lifting device to a container

See for example US 2004/0256266

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References
Limiting references

This place does not cover:

Lifting devices per se such as spreaders for containers

B66C 1/101

Lifting from below container

B66C 1/223

{for connection to anchor inserts embedded in concrete structures}
Definition statement

This place covers:

See for example US 4 634 164

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References
Informative references

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

Anchors in concrete elements

E04G 21/142

mounted on, or guided by, jibs (jibs B66C 23/64)
Definition statement

This place covers:

lifting devices mounted on a rigid arm, boom, jib etc. rather than suspended from a flexible element such as a cable or chain

See for example US 2009/0245989

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{Grab supports, e.g. articulations; Oscillation dampers; Orientation (B66C 3/16 takes precedence)}
Definition statement

This place covers:

See for example US 2006/0086685

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Bucket grabs
Definition statement

This place covers:

See for example US 3 949 498

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Tine grabs
Definition statement

This place covers:

See for example US 2003/0042748

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Grabs actuated by a single rope or chain
Definition statement

This place covers:

Devices where a single rope is used for both raising and subgroupsering and opening/closing.

See for example US 5 649 729

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and having tipping rings
Definition statement

This place covers:

See for example US 1 853 250

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and having buckets opening automatically upon the grab being lowered on to the dump of material
Definition statement

This place covers:

See for example US 4 807 918

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{Devices for control}
Definition statement

This place covers:

See for example US 2 270 916

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Grabs actuated by two or more ropes
Definition statement

This place covers:

Devices where separate ropes are used for raising and subgroupsering and opening/closing.

See for example US 4 328 987

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{Devices for control}
Definition statement

This place covers:

See for example US 4 231 698

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Grabs opened or closed by driving motors thereon
Definition statement

This place covers:

Grabs operated other than by electric or hydraulic motors, e.g. magnets

See for example US 6 179 357

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by fluid motors
Definition statement

This place covers:

See for example US 2006/0230649

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by electric motors
Definition statement

This place covers:

See for example US 5 622 468

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mounted on, or guided by, jibs (jibs B66C 23/64)
Definition statement

This place covers:

See for example US 2009/0250887

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Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape {or tripods}
Definition statement

This place covers:

See for example US 7 503 460

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{Tripods}
Definition statement

This place covers:

See for example US 6 283 455

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with runways or tracks supported for movements relative to bridge or gantry
Definition statement

This place covers:

See for example US 4 106 641

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with runways or tracks supported for lateral swinging movements
Definition statement

This place covers:

See for example US 5 593 050

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with vertically invlinable runways or tracks
Definition statement

This place covers:

See for example US 4 762 240

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Portals, i.e. essentially circular or square platforms with three or more legs specially adapted for supporting slewing jib cranes
Definition statement

This place covers:

See for example US 2008/0237174

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Girders, or track-supporting structures, specially adapted for cranes (base supporting structures with legs B66C 5/00; girders in general E04C 3/02)
Definition statement

This place covers:

See for example US 3 319 802

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References
Limiting references

This place does not cover:

Runways or tracks for trolleys

B66C 7/00

for underhung trolleys or cranes
Definition statement

This place covers:

See for example US2002/0014568

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Trackway suspension
Definition statement

This place covers:

See for example US 2007/0186800

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Constructional features of runway rails or rail mountings (of general application E01B)
Definition statement

This place covers:

Details of rails, mountings, suspension etc.

See for example US 3 335 955

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References
Limiting references

This place does not cover:

Devices for underhung trolleys

B66C 7/02

Arrangements or devices for extending runways or tracks
Definition statement

This place covers:

Extension parts with different section.

Extensions pivoted to or telescoped in end of track section.

See for example US 2006/0260502

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References
Limiting references

This place does not cover:

Similar track sections joined to each other

B66C 7/14

Devices for changing direction of travel or for transferring from one runway to another; Crossings; Combinations of tracks of different gauges (transfer devices of general application E01B)
Definition statement

This place covers:

Devices on rails for allowing transfer.

See for example US 2003/0140816

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References
Limiting references

This place does not cover:

Devices on trolleys allowing transfer to other rail

B66C 9/04

Devices on trolleys allowing transfer to different gauge

B66C 9/06

Runway interlocking devices
Definition statement

This place covers:

Similar track sections joined to each other.

See for example US2010/0019055

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References
Limiting references

This place does not cover:

Extension parts with different section or pivoted /telescoping extensions

B66C 7/10

Devices specially adapted for limiting trolley or crane travel; Arrangements of buffer-stops (buffer-stops of interest apart from this application B61K 7/18; limit-switch arrangements, limit circuits B66D 1/56)
Definition statement

This place covers:

See for example US 6 216 601

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for underhung trolleys or cranes
Definition statement

This place covers:

Trolley suspension arrangements

See for example US US2011/0076125

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to facilitate negotiation of curves
Definition statement

This place covers:

Steering of wheeled cranes.

See for example US 6 206 127

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Wheel arrangements for running around curves on rails.

See for example US 5 623 879

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for more than one rail gauge
Definition statement

This place covers:

Trolleys adapted to run on different rails.

See for example EP 0 204 383

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References
Limiting references

This place does not cover:

Devices on rails for allowing transfer

B66C 7/12

Runners; Runner bearings (wheels for railbound vehicles B60B)
Definition statement

This place covers:

See for example US 2008/0210654

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Undercarriages or bogies, e.g. end carriages, end bogies
Definition statement

This place covers:

Bogies for end of bridge of overhead cranes or bogies for wheeled cranes.

See for example US 5 161 730

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with load-distributing means for equalising wheel pressure
Definition statement

This place covers:

See for example US 3 877 391

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Trolley or crane travel drives (rope, cable, or chain drives for loads or trolleys B66C 11/16; control B66C 13/18)
Definition statement

This place covers:

See for example US 2008/0047919

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with means for maintaining alignment between wheels and track
Definition statement

This place covers:

See for example US 6 082 562

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with means for locking trolleys or cranes to runways or tracks to prevent inadvertent movements
Definition statement

This place covers:

Braking devices.

See for example US 2001/0052439

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with operating gear or operator's cabin suspended, or laterally offset, from runway or track
Definition statement

This place covers:

See for example US 4 752 011

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Underhung trolleys (power-operated hoists with driving motor and drum or barrel contained in a common housing B66D 3/20)
Definition statement

This place covers:

See for example WO 94/03388

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running on monorails (overhead railway systems B61B)
Definition statement

This place covers:

Smaller trolleys supported by a single rail.

See for example US 6 250 484

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References
Informative references

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

Features of lifting arrangement

B66D 3/18

with turntables
Definition statement

This place covers:

See for example US 3 887 080

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equipped with jibs (jib-cranes B66C 23/00)
Definition statement

This place covers:

See for example EP 1 288 156

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having hoisting gear adapted to special load-engaging elements and not otherwise provided for
Definition statement

This place covers:

For example devices using counterweights.

See for example US2003/0019828

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References
Limiting references

This place does not cover:

Elevators with counterweights

B66B

adapted to operate on crane or bridge structure of particular configuration, e.g. on reinforced concrete girders of rectangular cross-section
Definition statement

This place covers:

See for example US 2011/0006026

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Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
Definition statement

This place covers:

See for example US 6 250 486

media103.png

References
Limiting references

This place does not cover:

Drives for running gear, e.g. wheels

B66C 9/14

comprising endless ropes or cables
Definition statement

This place covers:

See for example US 5 765 981

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Arrangements, e.g. comprising differential gears, enabling simultaneous or selective operation of travelling and hoisting gear; Arrangements using the same rope or cable for both travelling and hoisting, e.g. in Temperley cranes (power transmissions between driving motors and winch drums B66D 1/14)
Definition statement

This place covers:

See for example US 6 343 702

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actuated pneumatically or hydraulically
Definition statement

This place covers:

See for example EP 0 081 935

media106.png

with means for locating or sustaining the loads or trolleys in predetermined positions; Hay hoists
Definition statement

This place covers:

See for example EP 0 063 724

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Abutments; Stop blocks; End stops
Definition statement

This place covers:

See for example DE 84 16 063 U1

media108.png

{Cranes carrying advertisements or the like}
Definition statement

This place covers:

See for example WO 97/34282

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Devices for facilitating retrieval of floating objects, e.g. for recovering crafts from water (handling live-boats B63B; salvaging, or hauling-out on slipways, waterborne vessels B63C; winding mechanism controls B66D 1/52)
Definition statement

This place covers:

See for example WO2009/038468

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References
Limiting references

This place does not cover:

Winch controls for swell compensation

B66D 1/52

Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
Definition statement

This place covers:

Controlling vertical load movements.

See for example US 4 930 828

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References
Limiting references

This place does not cover:

Controlling horizontal movements

B66C 13/06

for minimising or preventing longitudinal or transverse swinging of loads
Definition statement

This place covers:

Mechanical sway compensation systems.

See for example US 2007/0158290

media112.png

References
Limiting references

This place does not cover:

Reducing vertical load oscillation

B66C 13/04

Ensuring correct final load position

B66C 13/08

{electrical}
Definition statement

This place covers:

Electrical sway compensation systems.

See for example US 2010/0094464

media113.png

{for minimising vibration of a boom}
Definition statement

This place covers:

See for example EP 1 174 384

media114.png

for depositing loads in desired attitudes or positions
Definition statement

This place covers:

Mechanical arrangements for accurate final load position or orientation.

See for example US2007/0284327

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References
Limiting references

This place does not cover:

Anti-sway systems

B66C 13/06

{electrical}
Definition statement

This place covers:

Electrical arrangements for accurate final load position or orientation.

See for example US2005/0232733

media116.png

References
Limiting references

This place does not cover:

Anti-sway systems

B66C 13/063

for preventing cable slack (control devices for rope, cable, or chain winding mechanisms, e.g. for controlling tensions, B66D 1/40)
Definition statement

This place covers:

Devices to prevent cable from hanging loose, i.e. with no tension, by supporting or applying tension.

See for example US 2005/0218100

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References
Limiting references

This place does not cover:

Anti-slack devices for winches

B66D 1/50

{electrical}
Definition statement

This place covers:

Anti-slack devices using electrical control, e.g. limit switches or tension measurement.

See for example US 4 487 741

media118.png

References
Limiting references

This place does not cover:

Anti-slack devices for winches

B66D 1/505

Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
Definition statement

This place covers:

Cable or hose arrangements.

See for example US 5 294 066

media119.png

to load-engaging elements or motors associated therewith
Definition statement

This place covers:

Energy supply to load engaging elements, including local energy generation devices.

See for example US 5 280 880

media120.png

Applications of indicating, registering, or weighing devices (in crane hooks B66C 1/40; in safety gear B66C 15/00; weighing-apparatus G01G; remote indicating in general G08)
Definition statement

This place covers:

Load measurement, either directly or indirectly, e.g. via motor torque.

See for example US 2011/0066394

media121.png

References
Limiting references

This place does not cover:

Load measurement on crane hook

B66C 1/40

Load measurement in connection with safety control

B66C 15/00

Control systems or devices (exclusively for rope, cable, or chain winding mechanisms B66D 1/40)
Definition statement

This place covers:

General control arrangements not fitting one of the following subgroups.

See for example US 6 269 635

media122.png

for non-electric drives (transmitting control pulses B66C 13/40)
Definition statement

This place covers:

Hydraulic or mechanical control devices.

See for example US 5 732 835

media123.png

for electric drives (transmitting control pulses B66C 13/40; systems or devices of general application H02P)
Definition statement

This place covers:

See for example US 4 614 274

media124.png

References
Limiting references

This place does not cover:

Controls for load lifting and lowering

B66C 13/23

Circuits for horizontal motion

B66C 13/30

Circuits for controlling the lowering of the load
Definition statement

This place covers:

Control of crane lowering and lifting drives.

See for example US 2011/0130863

media125.png

References
Limiting references

This place does not cover:

Control drives for winches

B66D 1/40

utilising regenerative braking for controlling descent of heavy loads and having means for preventing rotation of motor in the hoisting direction when load is released
Definition statement

This place covers:

Crane drives with regeneration of energy when lowering.

See for example US 5 936 375

media126.png

Circuits for braking, traversing, or slewing motors
Definition statement

This place covers:

Circuits for horizontal motion control.

See for example US 5 751 126

media127.png

for operating grab bucket hoists by means of one or more electric motors used both for hosting and lowering the loads and for opening and closing the bucket jaws (other aspects or rope, cable, or chain winding mechanisms specially adapted for actuating grab buckets B66D 1/62)
Definition statement

This place covers:

See for example US4364704

media128.png

Applications of devices for transmitting control pulses; Applications of remote control devices (control in general G05)
Definition statement

This place covers:

Remote controls for cranes and winches, i.e. outside cabin, includes both hard wired and wireless units.

See for example US 2003/0164349

media129.png

References
Limiting references

This place does not cover:

Control devices inside crane cabin

B66C 13/56

Hydraulic transmitters
Definition statement

This place covers:

Control arrangements using hydraulic signal transmission, e.g. between sensor and central unit.

Electrical transmitters
Definition statement

This place covers:

Control arrangements using electric signal transmission, e.g. between sensor and central unit.

See for example US 2009/0250424

media130.png

References
Limiting references

This place does not cover:

Remote controls

B66C 13/40

Position indicators for suspended loads or for crane elements
Definition statement

This place covers:

Sensors and cameras for detecting position of loads or parts of crane.

See for example US 2004/0015264

media131.png

Automatic control of crane drives for producing a single or repeated working cycle; Programme control
Definition statement

This place covers:

Systems allowing the crane to carry out an automatic movement, for example based on a program or target position, includes path planning and stack optimisation.

See for example US 6 065 619

media132.png

Applications of limit circuits or of limit-switch arrangements (for winding mechanisms B66D 1/56)
Definition statement

This place covers:

See for example US 2011/0089131

media133.png

References
Limiting references

This place does not cover:

Winches

B66D 1/56

Portable lifting appliances

B66D 3/24

Details of compartments for driving engines or motors or of operator's stands or cabins
Definition statement

This place covers:

Engine and motor compartments.

See for example US 4 045 866

media134.png

References
Limiting references

This place does not cover:

Operator's compartments

B66C 13/54

Operator's stands or cabins
Definition statement

This place covers:

Operator's compartments.

See for example EP 0 870 725

media135.png

References
Limiting references

This place does not cover:

Operating devices

B66C 13/56

Operator's compartments for fork lift trucks

B66F 9/07545

Operator's compartments for soil shifting machines

E02F 9/16

Arrangements of handles or pedals
Definition statement

This place covers:

Control devices actuated by the operator.

See for example US 2007/0156280

media136.png

References
Limiting references

This place does not cover:

Remote controls, i.e. outside cabin

B66C 13/40

Controls for fork lift trucks

B66F 9/20

Controls for excavators

E02F 9/20

General control handles

G05G 9/00

Safety gear (for rope, cable, or chain winding mechanisms B66D 1/54)
Definition statement

This place covers:

General crane safety devices not covered by one of the following subgroups

for example component testing.

US 4 643 031

media137.png

References
Limiting references

This place does not cover:

Safety devices for boom cranes

B66C 23/88

Safety devices for winches

B66D 1/54

for retaining load-engaging elements in the event of rope or cable breakage
Definition statement

This place covers:

See for example US 5 735 507

media138.png

for preventing collisions, e.g. between cranes or trolleys operating on the same track
Definition statement

This place covers:

See for example DE 10 2009 006 103

media139.png

{electrical}
Definition statement

This place covers:

Electrical anti-collision devices.

See for example US 3 167 753

media140.png

Arrangements or use of warning devices
Definition statement

This place covers:

Non-electric devices, e.g. with visual indication

See for example US 2007/0205618

media141.png

{electrical}
Definition statement

This place covers:

See for example EP 1 221 426

media142.png

with lifting beams, e.g. slewable beams, carrying load-engaging elements, e.g. magnets, hooks (constructions of load-engaging elements B66C 1/00, B66C 3/00)
Definition statement

This place covers:

Devices where the load carrying element is connected to the lifting beam, i.e. not suspended by cables.

See for example EP 0 314 632

media143.png

specially adapted for particular purposes, e.g. in foundries, forges; combined with auxiliary apparatus serving particular purposes (B66C 17/04 takes precedence)
Definition statement

This place covers:

Specially adapted devices, i.e. with particular mechanical features making them especially suitable for a particular application not covered by the following subgroups.

for charging treatment chambers, e.g. furnaces, kilns, ovens (charging furnaces in general F27D 3/00)
Definition statement

This place covers:

See for example EP 2 275 764

media144.png

for transporting ladles
Definition statement

This place covers:

See for example US 3 874 513

media145.png

for handling workpieces, e.g. ingots, which require to be supported temporarily within, or withdrawn from, a treatment chamber, e.g. tong cranes, soaking-pit cranes, stripper cranes (for manipulating ingots during forging B66C 17/18; grippers for handling or stripping castings or ingots during manufacture B22D 29/00)
Definition statement

This place covers:

See for example US 4 736 971

media146.png

Tong cranes with means for moving article-pushers relative to the tongs
Definition statement

This place covers:

See for example DE 1 181 866 B

media147.png

Tong cranes with means for turning the tongs about a vertical axis
Definition statement

This place covers:

See for example DE 1 109 196 B

media148.png

for manipulating workpieces during forging operations (work-pieces manipulators in forging machines B21J 13/10)
Definition statement

This place covers:

See for example DE 35 08 195

media149.png

for hoisting or lowering heavy load carriers, e.g. freight containers, railway wagons
Definition statement

This place covers:

See for example US 5 803 280

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References
Limiting references

This place does not cover:

Gantry cranes or straddle carriers

B66C 19/00

for hoisting or lowering locomotives
Definition statement

This place covers:

See for example US 1 497 961

media151.png

combined with auxiliary apparatus, e.g. log saws, pushers for unloading vehicles, means for shunting railway vehicles
Definition statement

This place covers:

See for example US 2011/0142590

media152.png

Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries (B66C 17/00 takes precedence; base supporting structures with legs B66C 5/00; jib cranes B66C 23/00)
Definition statement

This place covers:

Gantry cranes not covered by the following subgroups.

See for example US 5 405 029

media153.png

{Container cranes (B66C 19/007 takes precedence)}
Definition statement

This place covers:

Gantry cranes for containers, i.e. static cranes or cranes with wheels which are static when handling loads.

See for example US 2009/0191028

media154.png

References
Limiting references

This place does not cover:

Straddle carriers for containers

B66C 19/007

{Straddle carriers (B66C 19/007 takes precedence)}
Definition statement

This place covers:

Straddle carriers for loads other than containers, e.g. boats.

See for example US 5 893 471

media155.png

References
Limiting references

This place does not cover:

Straddle carriers for containers

B66C 19/007

{for containers}
Definition statement

This place covers:

Straddle carriers for containers, i.e. wheeled devices which carry containers around ports.

See for example EP 1 829 810

media156.png

References
Limiting references

This place does not cover:

Gantry cranes for containers

B66C 19/002

collapsible {(B66C 19/002, B66C 19/005 takes precedence)}
Definition statement

This place covers:

Easily dismantlable gantry cranes.

See for example US2007/0163982

media157.png

Cable cranes, i.e. comprising hoisting devices running on aerial cable-ways (rope or cable drives for trolleys, combinations of such drives with hoisting gear B66C 11/16; railway systems B61B; rope or cable winding mechanisms B66D 1/00)
Definition statement

This place covers:

Devices not falling into one of the following subgroups.

See for example US 7 234 605

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with cable-ways supported on framework swingably connected to groundengaging elements
Definition statement

This place covers:

Cable cranes where one support for the end of the cable is pivotable.

See for example GB 130 008

media159.png

with cable-ways supported at one end or both ends on bodily movable framework, e.g. framework mounted on rail track
Definition statement

This place covers:

Cable cranes where one end of the cable is not fixed.

See for example US 5 816 636

media160.png

with one end supported on a framework movable in a curved, e.g. circular, path and the other end by a column rotatable around a vertical axis
Definition statement

This place covers:

See for example DE 30 37 894

media161.png

Sag carriers or rope trolleys, suspended or not, e.g. fixed but offering clearance for travelling gear
Definition statement

This place covers:

Arrangements for supporting cables.

See for example US 4 355 727

media162.png

travelling
Definition statement

This place covers:

Supports which are movable along the cable.

See for example GB 374 921

media163.png

Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes (base supporting structures with legs B65C 5/00)
Special rules of classification

Stationary cranes are classified in B66C 23/00 - B66C 23/24.

Tower type cranes (which may be mobile) are classified in B66C 23/26 - B66C 23/34.

Mobile cranes are classified in B66C 23/36 and later subgroups.

Groups B66C 23/54 onwards apply to all types of crane.

{with balanced jib, e.g. pantograph arrangement, the jib being moved manually}
Definition statement

This place covers:

See for example US 5 203 837

media164.png

with non-adjustable and non-inclinable jibs mounted solely for slewing movements
Definition statement

This place covers:

Jib cranes with a fixed vertical column mounted on the ground as the sole support, with a jib mounted for slewing at the top of the column, i.e. the column does not rotate and the inclination of the jib can not be altered.

References
Limiting references

This place does not cover:

Jib cranes where the column also rotates or the jib inclination can be altered

B66C 23/16

Jib cranes which are supported by other means, e.g. additional support from a building

B66C 23/20

Mobile cranes

B66C 23/36

Vehicle mounted cranes

B66C 23/44

Small cranes on wheels

B66C 23/48

Special rules of classification

This group is only used if the following subgroups are not applicable. Documents may be classified in more than one subgroup.

{Pivot axis common with column}
Definition statement

This place covers:

Jibs pivoting around the centre of the column.

See for example WO 2009/003554

media165.png

{with particular mounting for base of column}
Definition statement

This place covers:

See for example EP 1 460 024

media166.png

{Pivot axis separated from column axis}
Definition statement

This place covers:

Jibs whose pivot is not in line with the axis of the column.

See for example US 6 367 855

media167.png

with jibs the effective length of which is variable in operation, e.g. longitudinally displaceable, extensible
Definition statement

This place covers:

See for example US 5 509 638

media168.png

References
Limiting references

This place does not cover:

Telescopic booms e.g. for mobile cranes

B66C 23/701

with jibs mounted for jibbing or luffing movements
Definition statement

This place covers:

Fixed cranes with luffing jibs not covered by one of the subgroups B66C 23/08 - B66C 23/14.

References
Limiting references

This place does not cover:

Column mounted luffing jibs

B66C 23/16

Derricks

B66C 23/60

Luffing mechanisms

B66C 23/82

and adapted to move the loads in predetermined paths
Definition statement

This place covers:

Mechanical arrangements for following a particular non-horizontal path.

See for example DE 44 15 029

media169.png

References
Limiting references

This place does not cover:

Control devices for particular paths

B66C 13/48

the paths being substantially horizontal; Level-luffing jib-cranes
Definition statement

This place covers:

See for example US 3 884 359

media170.png

with means for automatically varying the effective length of the hoisting rope or cable
Definition statement

This place covers:

See for example GB 1 392 223

media171.png

with means, e.g. pantograph arrangements, for varying jib configuration
Definition statement

This place covers:

See for example GB 985 801

media172.png

with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
Definition statement

This place covers:

Jib cranes with a fixed vertical column mounted on the ground as the sole support, includes cranes with a jib mounted for slewing at the centre or bottom of the column, i.e. at least part of the column rotates. the jib may or may not be inclinable.

See for example US 3 358 849

media173.png

References
Limiting references

This place does not cover:

Jib cranes with a jib mounted for slewing at the top of the column, i.e. the column does not rotate and the inclination of the jib can not be altered.

B66C 23/02

Jib cranes which are supported by other means, e.g. additional support from a building

B66C 23/20

Vehicle mounted cranes

B66C 23/44

Small cranes on wheels

B66C 23/48

Derrick cranes

B66C 23/60

{where only part of the column rotates, i.e. at least the bottom part is fixed}
Definition statement

This place covers:

See for example US 3 181 707

media174.png

References
Limiting references

This place does not cover:

Cranes where all the column is fixed

B66C 23/02

{Simple cranes with jibs which may be fixed or can slew or luff}
Definition statement

This place covers:

Small cranes without wheels.

See for example US 2005/0161422

media175.png

specially adapted for use in particular purposes
Definition statement

This place covers:

Cranes with jibs for specific applications not covered by the following groups B66C 23/20 - B66C 23/52.

See for example US 2001/0051074

media176.png

{for use erecting wind turbines (B66C 23/207 takes precedence)}
Definition statement

This place covers:

See for example US 2005/0211653

media177.png

References
Limiting references

This place does not cover:

Load connecting element for lifting wind turbines

B66C 1/108

Cranes supported on or by wind turbines

B66C 23/207

with supporting couples provided by walls of buildings or like structures
Definition statement

This place covers:

Jib cranes which are not supported only by a simple foot on the ground, but (also) by other means, e.g. additional support from a building, which do not fit one of the following subgroups.

References
Limiting references

This place does not cover:

Vehicle mounted cranes

B66C 23/44

Small cranes on wheels

B66C 23/48

{with supporting couples provided from above, e.g. by ceilings of buildings}
Definition statement

This place covers:

Supported either from only above or from both above and below.

See for example US 4 096 952

media178.png

References
Limiting references

This place does not cover:

Cranes supported in window openings

B66C 23/22

{with supporting couples provided from below, e.g. by floors of buildings}
Definition statement

This place covers:

Cranes supported only from below, but requiring extra support, i.e. not merely mounted by a simple crane foot.

See for example US 2 382 299

media179.png

References
Limiting references

This place does not cover:

Cranes supported both from below and above

B66C 23/201

{with supporting couples provided by posts, e.g. scaffolding, trees or masts}
Definition statement

This place covers:

See for example US 4 880 345

media180.png

References
Limiting references

This place does not cover:

Cranes attached to wind turbines

B66C 23/207

{for use on top of roofs}
Definition statement

This place covers:

See for example US 3 671 015

media181.png

{with supporting couples provided by iso containers}
Definition statement

This place covers:

Cranes mounted on or in containers

See for example EP 2 196 427

media182.png

{with supporting couples provided by wind turbines}
Definition statement

This place covers:

Mounted on or supported by wind turbines or for erecting wind turbines.

See for example EP1 677 007

media183.png

References
Limiting references

This place does not cover:

Load connecting element for lifting wind turbines

B66C 1/108

Cranes not supported by the wind turbine

B66C 23/185

{with supporting couples provided from the side, e.g. by walls of buildings}
Definition statement

This place covers:

Cranes fixed to walls, i.e. which do not move relative to the wall.

See for example GB 2 037 701

media184.png

References
Limiting references

This place does not cover:

Cranes which can run along walls

B66C 23/24

Window cranes, i.e. adapted to be supported in window openings
Definition statement

This place covers:

See for example US 2008/0035594

media185.png

Mobile wall cranes
Definition statement

This place covers:

Cranes with a jib which runs along a wall.

See for example US 3 050 195

media186.png

References
Limiting references

This place does not cover:

Cranes fixed to walls, i.e. which do not move relative to the wall

B66C 23/208

for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail (with supporting couples provided by walls or buildings B66C 23/20; mounted on vehicles B66C 23/36; jib constructions B66C 23/64)
Definition statement

This place covers:

Tower type cranes not fitting one of the subgroups B66C 23/28 - B66C 23/34.

See for example US 6 422 408

media187.png

constructed to operate at successively higher levels
Definition statement

This place covers:

Tower cranes where the jib does not have a fixed tower height relative to the ground and do not fit the following two subgroups.

References
Limiting references

This place does not cover:

Cranes where the tower is telescopic

B66C 23/30

Cranes which climb

B66C 23/32

{with frameworks composed of assembled elements}
Definition statement

This place covers:

Cranes which have towers which can be extended by adding an extra section to the tower.

See for example US 4 028 792

media188.png

{with locking devices}
Definition statement

This place covers:

See for example US 3 499 258

media189.png

with frameworks composed of telescopic elements
Definition statement

This place covers:

Cranes which have towers which can be extended by a telescoping section of the tower.

See for example US 4 196 814

media190.png

{with locking devices}
Definition statement

This place covers:

See for example US 3 361 456

media191.png

Self-hoisting cranes
Definition statement

This place covers:

Cranes which can alter the height of the jib and top of tower by climbing up other structures.

See for example US 3 485 384

media192.png

Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
Definition statement

This place covers:

Cranes which can assemble or erect themselves into their working configuration, not falling into one of the following four subgroups.

See for example US 3 378 147

media193.png

References
Limiting references

This place does not cover:

Mobile cranes with arrangements for assembling and lifting the boom from the ground.

B66C 23/82

{with telescopic elements}
Definition statement

This place covers:

Cranes which erect by extending a telescopic section.

See for example US 4 446 975

media194.png

{adapted for transport purposes}
Definition statement

This place covers:

Where the arrangement relates specifically to transport of the crane, i.e. not merely to folding the tower and jib to the horizontal position.

See for example US 2004/0221673

media195.png

References
Limiting references

This place does not cover:

Mobile cranes dismantlable for transport

B66C 23/365

{with locking devices}
Definition statement

This place covers:

Cranes with devices for locking the elements into their operating or transport positions.

See for example US 3 856 150

media196.png

{the erection being operated by jacks}
Definition statement

This place covers:

Cranes where the erecting mechanism uses jacks instead of for example winches and cables.

See for example US 2003/0127409

media197.png

mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes (with pneumatic or hydraulic motors B66C 23/54; vehicle or ship aspects B60 - B63)
Definition statement

This place covers:

Vehicle mounted cranes not fitting one of the subgroups B66C 23/38 – B66C 23/545.

{dismantable into smaller units for transport purposes}
Definition statement

This place covers:

See for example US 2007/0221600

media198.png

References
Limiting references

This place does not cover:

Tower cranes dismantlable for transport

B66C 23/344

with separate prime movers for crane and vehicle
Definition statement

This place covers:

Mobile cranes with more than one engine, e.g. where the engine driving the crane lifting functions is not used for propelling the crane along a road.

with a single prime mover for both crane and vehicle
Definition statement

This place covers:

Where the same engine is used for driving the lifting functions and wheels or tracks.

with jibs of adjustable configuration, e.g. foldable
Definition statement

This place covers:

Mobile cranes with telescopic or extendable jibs, or jibs which change configuration during operation.

See for example US 5 704 498

media199.png

References
Limiting references

This place does not cover:

Cranes with jibs which are folded for transport using cylinders.

B66C 23/54

Jib-cranes adapted for attachment to standard vehicles, e.g. agricultural tractors
Definition statement

This place covers:

Vehicle mounted cranes, i.e. mounted on a normal vehicle rather than a mobile crane where the chassis is specially constructed for a crane.

pipe laying cranes where a boom is mounted to one side of a wheeled or tracked chassis.

See for example US 6 138 991 or US 7 600 646

media200.pngmedia201.png

References
Limiting references

This place does not cover:

Cylinder operated jibs on trucks

B66C 23/54

Mobile jib-cranes with non-slewable jibs
References
Limiting references

This place does not cover:

Pipe laying cranes

B66C 23/44

Manually-movable jib cranes for use in workshops
Definition statement

This place covers:

Small cranes on wheels which can be moved around manually or have simple drives.

See for example US 2011/0043062

media202.png

{for lifting and moving engines, e.g. car or aero engines or parts thereof}
Definition statement

This place covers:

See for example US 5 800 000

media203.png

References
Limiting references

This place does not cover:

Load connecting element for lifting engines

B66C 1/107

mounted on railway vehicles, e.g. breakdown cranes
Definition statement

This place covers:

See for example US 6 691 881

media204.png

Floating cranes (floating dredgers E02F)
Definition statement

This place covers:

Cranes mounted on a ship or other floating structure.

See for example US2011/0031205

media205.png

{Double slewing cranes on ships}
Definition statement

This place covers:

Cranes with double jibs.

See for example US 3 684 104

media206.png

References
Limiting references

This place does not cover:

Cranes with double jibs mounted on land

B66C 23/00

including counterweight or means to compensate for list, trim, or skew of the vessel or platform (counterweights or supports for balancing lifting couples B66C 23/72; equipment to decrease unwanted vessel movements B63B 39/00)
Definition statement

This place covers:

See for example WO2011/019121

media207.png

{with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors}
Definition statement

This place covers:

Jib cranes with hydraulic cylinders, e.g. for folding jib for transport.

See for example EP 1 707 529

media208.png

Special rules of classification

No corresponding IPC exists. Subject matter should be given an IPC classification in B66C 23/68

{with arrangements for avoiding dead centre problems during cylinder motion}
Definition statement

This place covers:

See for example EP 0 733 585

media209.png

arranged to carry out a desired sequence of operations automatically, e.g. hoisting followed by luffing and slewing
Definition statement

This place covers:

See for example US 4 091 943

media210.png

Derricks
Definition statement

This place covers:

See for example US 4 826 023

media211.png

{employing ships' masts (B66C 23/525 takes precedence)}
Definition statement

This place covers:

See for example US 4 187 949

media212.png

References
Limiting references

This place does not cover:

Double derricks on ships

B66C 23/525

Jibs
Definition statement

This place covers:

Construction of jibs not covered by the following subgroups, e.g. non-telescopic jibs.

See for example US 2011/0114587

media213.png

References
Limiting references

This place does not cover:

Telescopic jibs

B66C 23/701

Outer or upper end constructions
Definition statement

This place covers:

See for example EP 1 156 007

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References
Limiting references

This place does not cover:

Jib extensions for telescopic jibs

B66C 23/702

foldable or otherwise adjustable in configuration
Definition statement

This place covers:

See for example US 2010/0294738

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References
Limiting references

This place does not cover:

Folding jibs using cylinders

B66C 23/54

Extendable jibs

B66C 23/70

Telescopic jibs

B66C 23/701

constructed of sections adapted to be assembled to form jibs or various lengths
Definition statement

This place covers:

See for example US 2004/0238471

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References
Limiting references

This place does not cover:

Telescopic jibs

B66C 23/701

{telescopic}
Definition statement

This place covers:

Telescopic sections.

See for example EP 1 302 435

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Telescoping actuator arrangements with a combination of actuators, e.g. by both cables and cylinders.

See for example US3721054

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{with a jib extension boom}
Definition statement

This place covers:

See for example US 2005/0098524

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{telescoped by flexible elements, e.g. cables, chains or bands}
Definition statement

This place covers:

See for example US 3 638 806

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References
Limiting references

This place does not cover:

Telescoping arrangements using both cables and cylinders

B66C 23/701

{telescoped by hydraulic jacks}
Definition statement

This place covers:

See for example US 5 678 708

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References
Limiting references

This place does not cover:

Telescoping arrangements using both cables and cylinders

B66C 23/701

{telescoped by other means}
Definition statement

This place covers:

See for example US 4 298 128

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{guiding devices for telescopic jibs}
Definition statement

This place covers:

Bearings between telescopic sections.

See for example US 6 499 612

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{locking devices for telescopic jibs}
Definition statement

This place covers:

Arrangements to lock the telescopic sections in a particular position.

See for example US 6 216 895

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Counterweights or supports for balancing lifting couples
Definition statement

This place covers:

Counterweights associated with jib.

See for example US 6 494 330

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References
Limiting references

This place does not cover:

Counterweights separate from jib

B66C 23/74

Informative references

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

Counterweights for excavators

E02F 9/18

separate from jib
Definition statement

This place covers:

Static counterweights not associated with jib.

See for example US 2006/0043042

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References
Limiting references

This place does not cover:

Movable counterweights not associated with jib

B66C 23/76

and movable to take account of variations of load or of variations of length of jib
Definition statement

This place covers:

Movable counterweights not associated with jib.

See for example US 6 568 547

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Supports, e.g. outriggers, for mobile cranes
Definition statement

This place covers:

See for example US 2010/0102018

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References
Limiting references

This place does not cover:

Hydraulic outriggers

B66C 23/80

Informative references

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

Outriggers for excavators

E02F 9/08

hydraulically actuated
Definition statement

This place covers:

See for example US 2004/0197181

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Luffing gear
Definition statement

This place covers:

Devices for luffing the jib, including for erection purposes.

See for example US 2005/0098522

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References
Limiting references

This place does not cover:

Self erecting cranes, e.g. tower cranes

B66C 23/34

{Bracing equipment for booms}
Definition statement

This place covers:

Bracing equipment to support bending load on the jib or boom, not covered by one of the following subgroups.

{Bracing equipment acting in vertical direction}
Definition statement

This place covers:

See for example EP 1 213 254

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{Bracing equipment acting in horizontal direction}
Definition statement

This place covers:

See for example EP 2 271 576

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{Bracing equipment acting at an inclined angle to vertical and horizontal directions}
Definition statement

This place covers:

See for example US 2004/0129663

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{where the angle is adjustable}
Definition statement

This place covers:

See for example US 2002/0070187

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Slewing gear (anti-friction bearings F16C)
Definition statement

This place covers:

Devices for slewing the upper works or boom of a crane.

See for example US2009/0074552

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References
Limiting references

This place does not cover:

Hydraulic slewing devices

B66C 23/86

hydraulically actuated
Definition statement

This place covers:

Devices for slewing the upper works or boom of a crane using hydraulic motors or cylinders.

See for example US 7 677 861

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Safety gear (for cranes in general B66C 15/00; for rope, cable, or chain winding mechanisms B66D 1/54)
Definition statement

This place covers:

Safety gear for boom cranes not covered by one of the subgroups B66C 23/90 - B66C 23/94.

References
Limiting references

This place does not cover:

General crane safety devices

B66C 15/00

Devices for indicating or limiting lifting moment
Definition statement

This place covers:

Non-electrical safety devices.

{electrical}
Definition statement

This place covers:

Electrical safety devices.

Snubbers or dashpots for preventing backwards swinging of jibs, e.g. in the event of cable or tackle breakage
Definition statement

This place covers:

See for example US 2 840 244

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for limiting slewing movements
Definition statement

This place covers:

See for example US 2007/0144995

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