IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0651182
(2000-08-30)
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발명자
/ 주소 |
- Topping, Jr., Richard A.
- Grapes, David B.
- Mayhew, Russell J.
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출원인 / 주소 |
|
대리인 / 주소 |
Webb Ziesenheim Logsdon Orkin & Hanson, P.C.
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인용정보 |
피인용 횟수 :
11 인용 특허 :
5 |
초록
▼
A manual winch includes a housing supporting a rotatable reel, a ratchet assembly coupled to the reel movable between an engaged and disengaged position, and a load releasing system for moving the ratchet assembly system to a disengaged position. The ratchet assembly includes a rotatable ratchet gea
A manual winch includes a housing supporting a rotatable reel, a ratchet assembly coupled to the reel movable between an engaged and disengaged position, and a load releasing system for moving the ratchet assembly system to a disengaged position. The ratchet assembly includes a rotatable ratchet gear which is adapted to be engaged by a pivotable locking pawl. The locking pawl is pivotable into and out of engagement with the ratchet gear for moving the ratchet assembly between the engaged and disengaged position. The locking pawl is mounted on a movable base which secures the locking pawl to the housing. The load releasing system includes a linear actuator for moving the relative position of the base relative to the ratchet gear and the housing, and a separate brake for holding the reel and ratchet gear in position under a load.
대표청구항
▼
A manual winch includes a housing supporting a rotatable reel, a ratchet assembly coupled to the reel movable between an engaged and disengaged position, and a load releasing system for moving the ratchet assembly system to a disengaged position. The ratchet assembly includes a rotatable ratchet gea
A manual winch includes a housing supporting a rotatable reel, a ratchet assembly coupled to the reel movable between an engaged and disengaged position, and a load releasing system for moving the ratchet assembly system to a disengaged position. The ratchet assembly includes a rotatable ratchet gear which is adapted to be engaged by a pivotable locking pawl. The locking pawl is pivotable into and out of engagement with the ratchet gear for moving the ratchet assembly between the engaged and disengaged position. The locking pawl is mounted on a movable base which secures the locking pawl to the housing. The load releasing system includes a linear actuator for moving the relative position of the base relative to the ratchet gear and the housing, and a separate brake for holding the reel and ratchet gear in position under a load. ng assembly coupling said first and second controllers to cause substantially identical and simultaneous motion of said controllers by varying a fluid distribution, wherein said coupling assembly comprises: a first chamber including a first bellows for enabling a fluid in said first chamber to be displaced, said first bellows being coupled to said first controller; a second chamber including a second bellows for enabling a fluid in said second chamber to be displaced, said second bellows being coupled to said second controller, and a conduit for transporting fluid between said first and second chambers in response to motion of a said bellows. 2. An apparatus as claimed in claim 1, wherein said coupling assembly further comprises a third chamber including a third bellows for enabling a fluid in said third chamber to be displaced, said third bellows being coupled to said first controller, a fourth chamber including a fourth bellows for enabling a fluid in said fourth chamber to be displaced, said fourth bellows being coupled to said second controller, and a second conduit for transporting fluid between said third and fourth chambers. 3. An apparatus as claimed in claim 2, wherein said chambers are arranged such that on moving said first controller in one direction, fluid moves from said first chamber into said second chamber and from said fourth chamber into said third chamber. 4. An apparatus as claimed in claim 3, wherein said chambers are arranged such that on moving said first controller in the opposite direction, fluid moves from said second chamber into said first chamber and from said third chamber into said fourth chamber. 5. An apparatus as claimed in claim 3, wherein said first and second conduits have substantially identical length, cross-section, co-efficient of radial expansion and total fluid volume. 6. An apparatus as claimed in claim 5, wherein said coupling assembly further comprises an accumulator for relieving fluid pressure therein. 7. An apparatus as claimed in claim 1, wherein said coupling assembly further comprises a third chamber including a fluid displacer for enabling a fluid in said third chamber to be displaced, said fluid displacer being coupled to said first controller, a fourth chamber and a further fluid displacer for enabling fluid in said fourth chamber to be displaced, said further fluid displacer being coupled to said second controller, a second conduit for transporting fluid between third and fourth chambers, said chambers being arranged such that on moving said first controller in one direction, fluid moves from said first chamber into said second chamber and from said fourth chamber into said third chamber. 8. An apparatus as claimed in claim 7, wherein said first and second conduits have substantially identical length, cross-section, co-efficient of radial expansion and total fluid volume. 9. An apparatus as claimed in claim 8, wherein the fluid in said first conduit has the same temperature co-efficient of expansion as the fluid in said second conduit. 10. An apparatus as claimed in claim 9, further comprising a valve operable from a closed position to an open position to allow fluid communication between said first conduit and said second conduit, thereby decoupling both first and second controllers from each other. 11. An apparatus as claimed in claim 1, wherein said first chamber has a first chamber wall and said first bellows has a first flexible wall, said first chamber being defined by said first flexible wall and a portion of said first chamber wall surrounding said first flexible wall, and wherein said second chamber has a second chamber wall and said second bellows has a second flexible wall, said second chamber being defined by said second flexible wall and a portion of said second chamber wall surrounding said second flexible wall. 12. An apparatus as claimed in claim 1, wherein each of said of first and second bellows has a respective flexible wall, said first
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