Cooperative Patent Classification


CPC Definition - Subclass B66D

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Last Updated Version: 2016.11
CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS (winding or unwinding ropes or cables for feeding or storage purposes B65H; rope or cable winding or unwinding mechanisms for lifts B66B)
Definition statement

This place covers:

Rope, cable or chain winding or unwinding mechanisms for moving all loads except lift cages, e.g. winches for dredges; braking or detent devices characterised by their application for retarding or preventing rotary movement of a winding drum or barrel

IPC group B66D1/395 is not used in the internal ECLA classification scheme. Subject matter covered by this group is classified in the following ECLA groups: B66D 1/36, B66D 1/50

References
Limiting references

This place does not cover:

Lifting arrangements for furniture

Devices for life saving

Winding or unwinding ropes or cables for feeding or storage purposes

Cable winding or unwinding mechanisms for lifts

Winding units specially adapted for drilling operations

Lifting arrangements for lamps

Rope, cable, or chain winding mechanisms; Capstans (portable or mobile lifting or hauling appliances B66D 3/00)
Definition statement

This place covers:

Rope, cable or chain winding or unwinding mechanisms for moving all loads except lift cages, e.g. Winches for dredges;

Winches mounted on vehicles.

References
Limiting references

This place does not cover:

Portable or mobile lifting or hauling appliances

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.

{Attaching winches to vehicle wheels}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/005

US 4 742 971

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Driving gear
Definition statement

This place covers:

Drives using for example springs, see for example US 4 009 843

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manually operated
Definition statement

This place covers:

Includes winches which can be driven both manually and powered (also classified in relevant subgroup of B66D 1/08 and B66D 1/12)

see for example US 2010/0133372

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References
Limiting references

This place does not cover:

Drives for capstan winches

Safety cranks for preventing unwanted crank rotation and subsequent lowering of the loads
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/06

US 3 939 729

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Safety devices for motor driven winches

incorporating fluid motors
Definition statement

This place covers:

Driven by either pneumatic or hydraulic motors

see for example US 5 692 735

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incorporating electric motors
Definition statement

This place covers:

Winches with particular motor types or motor drive arrangements

see for example US 2003/0001147

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Power transmissions between power sources and drums or barrels {(including brakes, one-way brakes, one-way clutches, clutches activated alternately with brakes, fixed ratio gearing unless otherwise provided for in B66D 1/16 - B66D 1/24)}
Definition statement

This place covers:

Including brakes, one-way brakes, one-way clutches, clutches activated alternately with brakes, fixed ratio gearing unless otherwise provided for in B66D 1/16 - B66D 1/24

the drums or barrels being freely rotatable {, e.g. having a clutch activated independently of a brake (B66D 1/20, B66D 1/22, B66D 1/24 take precedence; clutches activated alternately with brakes B66D 1/14, slip couplings B66D 1/14)}
Definition statement

This place covers:

E.g. having a clutch activated independently of a brake (B66D 1/20, B66D 1/22, B66D 1/24 take precedence)

see for example US 7 891 641

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References
Limiting references

This place does not cover:

Clutches activated alternately with brakes or slip couplings

and the power being transmitted from a continuously operating and irreversible prime mover {, i.e. an internal combustion engine, e.g. on a motor vehicle or a portable winch}
Definition statement

This place covers:

An engine e.g. an internal combustion engine on a motor vehicle or a portable winch

Planetary or differential gearings (for actuating grab buckets B66D 1/70 ){, i.e. with planet gears having movable axes of rotation}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/22

US 4 452 429

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References
Limiting references

This place does not cover:

Devices for actuating grab buckets

{variable ratio or reversing gearing (fixed ratio gearing B66D 1/22)}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/225

US 5 842 684

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References
Limiting references

This place does not cover:

Fixed ratio gearing

for varying speed or reversing direction of rotation of drums or barrels {, i.e. variable ratio or reversing gearing (B66D 1/225 takes precedence)}
References
Limiting references

This place does not cover:

Variable ratio planetary gearings

having several drums or barrels
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/26

US 3 787 031

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Other constructional details
Definition statement

This place covers:

Including e.g. frame and bearing arrangements;

Subgroups B66D 1/30 - B66D 1/525 take precedence

Rope, cable, or chain drums or barrels
Definition statement

This place covers:

Including drum construction; cooling;

References
Limiting references

This place does not cover:

Capstans

Attachment of ropes or cables to drums or barrels
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/34

US 2002/0104918

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Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/36

US 2005/0279977

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{by means of pivotably mounted drums or barrels}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/365

US 4 002 321

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by means of guides movable relative to drum or barrel
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/38

US 4 235 394

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by means of axially-movable drums or barrels {(pivotably mounted drums or barrel B66D 1/365)}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/39

US 4 087 060

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References
Limiting references

This place does not cover:

Pivotably mounted drums or barrels

non-automatic
Definition statement

This place covers:

Control devices which do not respond to external conditions

References
Limiting references

This place does not cover:

Remote controls for crane winches

pneumatic of hydraulic
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/42

US 6 371 447

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electric
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/46

US 2008/0099738

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automatic
Definition statement

This place covers:

includes pneumatic and hydraulic control arrangements

US 2005/0143219

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{electrical}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/485

US 5 818 185

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for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
Definition statement

This place covers:

Ensures cable tension does not rise above or fall below desired value.

see for example US 7 389 973

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References
Limiting references

This place does not cover:

Slack prevention controls for cranes

{electrical}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/505

US 2010/0116191

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for varying rope or cable tension, e.g. when recovering craft from water
Definition statement

This place covers:

Compensates for motion of load

see for example US 7 775 383

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References
Limiting references

This place does not cover:

Swell compensation controls for cranes

{electrical}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/525

US 2007/0272906

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Safety gear
References
Limiting references

This place does not cover:

Safety gear for cranes

Adaptations of limit switches
Definition statement

This place covers:

Responsive to cable length or position

References
Limiting references

This place does not cover:

Limit switch arrangements for portable winches

Limit switch arrangements for cranes

adapted for special purposes
References
Limiting references

This place does not cover:

Vehicle mounted winches

{scaffolding winshes (B66D 1/74 takes precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/605

US 6 688 582

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Relationships with other classification places

Also classified in E04G 3/32

for actuating grab buckets (electrical control in cranes B66C 13/32)
Special rules of classification

This subgroup not used. Documents are classified in B66C 3/06 - B66C 3/125

by means of a single rope or chain
Special rules of classification

This subgroup not used. Documents are classified in B66C 3/06 - B66C 3/125

driven by a single motor
Special rules of classification

This subgroup not used. Documents are classified in B66C 3/06 - B66C 3/125

driven by two motors
Special rules of classification

This subgroup not used. Documents are classified in B66C 3/06 - B66C 3/125

driven through planetary or differential gearings
Special rules of classification

This subgroup not used. Documents are classified in B66C 3/06 - B66C 3/125

Anchor-chain sprockets; Anchor capstans
Relationships with other classification places

Also classified in B63B 21/00

Capstans
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/74

US 2010/0242824

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References
Limiting references

This place does not cover:

Non driven bollards

Drive handles in general

{having two or more drums providing tractive force}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/7405

see for example US 4 634 102

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{and having rope storing means}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/741

US 2010/0262384

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{Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/7415

US 6 070 858

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{Self-tailing capstans}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/7494

US 4 595 173

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having auxiliary drums or barrels for storing the ropes or cables
Definition statement

This place covers:

Includes capstans with drum and capstans with storage compartment

see for example EP 1 985 575

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for shunting, e.g. in marshalling yards
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/78

US 3 502 301

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for scrapers
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/80

US 3 488 036

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Relationships with other classification places

Also classified in E02F 3/46

for slewing and hoisting by means of derricks
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 1/82

DE 24 10 784

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{using two or more cooperating endless chains}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/003

US 7 682 106

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{Power actuated devices operating on ropes, cables, or chains for hauling in a mainly horizontal direction (B66D 3/003 takes precedence)}
Definition statement

This place covers:

Also includes similar devices which may be used for lifting.

US 4 615 509

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Also includes similar devices which may be used for lifting.

Manually-operated, e.g. lever-actuated, devices operating on ropes, cables, or chains for hauling in a mainly horizontal direction (B66D 3/04, B66D 3/12 take precedence)
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/02

US 2003/0085392

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Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage (sheaves F16H 55/00)
Relationships with other classification places

sheaves F16H55/04

{Block and tackle system with variable number of cable parts}
Definition statement

This place covers:

Where the number of active pulleys can be varied e.g. to alter the mechanical advantage.

see for example US 3 794 185

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{Openable pulley blocks}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/04

US 5 249 543

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with more than one pulley
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/06

US 6 386 516

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Applications of braking or detent devices
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/10

US 4 934 660

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lever operated
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/14

US 2002/0153519

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operated by an endless chain passing over a pulley or a sprocket
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/16

US 3 542 341

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Power-operated hoists
Definition statement

This place covers:

Includes pneumatic load-balancing winches

see for example US 2003/0057408

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with driving motor, e.g. electric motor, and drum or barrel contained in a common housing
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 3/20

US 2008/0265810

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with variable-speed gearings between driving motor and drum or barrel
Definition statement

This place covers:

Also includes drives with a single gear ratio.

See for example US 3 971 971

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Applications of limit switches
References
Limiting references

This place does not cover:

Limit switch arrangements for large winches

Limit switch arrangements for cranes

Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads (for pulley blocks B66D 3/10)
Definition statement

This place covers:

braking or detent devices characterised by their application for retarding or preventing rotary movement of a winding drum or barrel

References
Limiting references

This place does not cover:

Braking devices operating on lift structures

Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
Definition statement

This place covers:

Includes regenerative braking and non-specified braking arrangements

{Cooling of brakes (in general F16D)}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/023

US 2 850 125

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References
Limiting references

This place does not cover:

General brake cooling

{Fluid-resistance brakes}
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/026

US 3 158 231

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actuated by centrifugal force
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/04

US 6 578 822

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embodying blocks or shoes
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/08

US 2011/0011682

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embodying bands
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/10

US 2011/0001102

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with axial effect (B66D 5/22 takes precedence)
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/12

US 7 857 289

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embodying discs
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/14

US 2006/0151254

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for action on ropes or cables
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/16

US 5 228 540

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for generating braking forces which are proportional to the loads suspended; Load-actuated brakes
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/18

US Re. 36 216

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with axial effect
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/22

US 5 330 036

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Operating devices
Definition statement

This place covers:

Includes brake testing arrangements; overload protection

see for example US

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pneumatic or hydraulic
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/26

US 2003/0155184

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electrical
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/30

US 2009/0260927

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Detent devices
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/32

see for example US 5 004 177

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having latches
Definition statement

This place covers:

Illustrative example of subject matter classified in B66D 5/34

US 2006/0186388

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