IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0695741
(2000-10-24)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Chapman/Leonard Studio Equipment
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
24 인용 특허 :
5 |
초록
▼
A camera dolly has a steering unit which provides conventional, crab, and round steering modes, selected by the operator via use of a single steering/shifting handle. The steering unit includes first and second transmissions and a differential. Chains link sprockets on the transmissions and differen
A camera dolly has a steering unit which provides conventional, crab, and round steering modes, selected by the operator via use of a single steering/shifting handle. The steering unit includes first and second transmissions and a differential. Chains link sprockets on the transmissions and differential, to steer the wheels of the camera dolly to appropriate angles, so that the dolly can roll easily and without wheel scrubbing. A dolly leg position compensator adjusts the amount of steering angle correction provided by the differential, to compensate for changes in the dolly wheelbase/tread dimensions. Sprockets in the differential are locked into offset positions, during conventional and round steering, to maintain proper steering angle correction, even under heavy loads. Active idlers are mechanically linked within the steering unit to automatically maintain appropriate chain tension, in all steering modes.
대표청구항
▼
A camera dolly has a steering unit which provides conventional, crab, and round steering modes, selected by the operator via use of a single steering/shifting handle. The steering unit includes first and second transmissions and a differential. Chains link sprockets on the transmissions and differen
A camera dolly has a steering unit which provides conventional, crab, and round steering modes, selected by the operator via use of a single steering/shifting handle. The steering unit includes first and second transmissions and a differential. Chains link sprockets on the transmissions and differential, to steer the wheels of the camera dolly to appropriate angles, so that the dolly can roll easily and without wheel scrubbing. A dolly leg position compensator adjusts the amount of steering angle correction provided by the differential, to compensate for changes in the dolly wheelbase/tread dimensions. Sprockets in the differential are locked into offset positions, during conventional and round steering, to maintain proper steering angle correction, even under heavy loads. Active idlers are mechanically linked within the steering unit to automatically maintain appropriate chain tension, in all steering modes. 20200, Kuboki et al., 280/735 cond trucks and engageable with the handle end to selectively secure the handle relative to the base when the handle is in the first position to provide an upright position for the handle and when the handle is in the second position to provide the base free of obstruction by the handle. 17. The skateboard of claim 16, wherein the handle includes first and second receptacles, the first and second receptacles correspond to the first and second positions, respectively; and the lock includes a lock member configured for receipt by one of the receptacles to selectively secure the handle in the first and second positions. 18. The skateboard of claim 17, wherein the first and second receptacles are through holes and the lock member is a pin. 19. The skateboard of claim 16, wherein the lock is disposed below the base. 20. The skateboard of claim 19, wherein the lock is slidably mounted to the base. 21. The skateboard of claim 20, wherein the base has a longitudinal axis and the lock slides parallel to the longitudinal axis. 22. The skateboard of claim 16, wherein the lock is biased into engagement with the handle. 23. The skateboard of claim 16, wherein the lock includes a resilient grip portion. 24. The skateboard of claim 23, wherein deformation of the resilient grip portion permits disengagement of the lock with the handle to selectively lock and unlock the handle. 25. The skateboard of claim 16, wherein the lock includes a lock housing mounted to the lower surface of the base, the lock housing including a longitudinal indent and at least one clip indent; a slider received in the longitudinal indent, the slider including at least one lock clip for mating engagement with the at least one clip indent to secure the slider. 26. The skateboard of claim 25, wherein the handle includes first and second receptacles, the first and second receptacles correspond to the first and second positions, respectively; and the slider includes a lock member configured for receipt by one of the receptacles to selectively secure the handle in the first and second positions. 27. The skateboard of claim 26, wherein a stop is located in the longitudinal indent and the slider includes a slot; and a spring is located in the slot and abutting the stop; wherein the lock member is resiliently biased into engagement with one of the first and second receptacles. 28. The skateboard of claim 16, wherein the base has a front portion and a rear portion, the handle being coupled to one of the front and rear portions and extending toward the other of the front and rear portions when in the second position; and a handle support connected to the handle and engageable with the top surface of the base to support the portion of the handle proximate the other of the front and rear portions when the handle is in the second position. 29. The skateboard of claim 28, wherein the handle support is engageable with the top surface substantially at a portion, of the peripheral edge. 30. A skateboard convertible between a first riding configuration and a second riding configuration, the convertible skateboard comprising: a base having a top surface and a peripheral edge; a first truck-mounted wheel set; a second truck-mounted wheel set; a handle mounted to the base and movable between a first locked position where the handle is upright relative to the base to provide an assist handle for a rider of the skateboard and a second locked position where the handle lies substantially outside of the peripheral edge of the base when viewed from above the top surface so as to provide the top surface as a surface unobstructed by the handle. 31. The convertible skateboard according to claim 30, wherein no portion of the handle extends across the top surface of the base when the handle is in the second locked position. 32. The convertible skateboard according to claim 30, wherein the handle includes a hand grip for grasping the handle when the handle is in the first locked position; and the hand grip being disposed substantially along the peripheral edge when the handle is the second locked position. 33. The convertible skateboard of claim 30, wherein the first truck-mounted wheel set and the second truck-mounted wheel set are aligned along a longitudinal axis of the base; and the handle conforms to the profile of the top surface in the longitudinal direction. 34. The convertible skateboard claim 30, wherein the base further comprises a channel extending in a direction transverse to the longitudinal direction; and a portion of the handle extends in the transverse channel. 35. The convertible skateboard of claim 30, further comprising a lock mounted to the base and selectively engageable with the handle to lock the handle relative to the base when handle is in each of the first locked position and the second locked position and the lock including: a gripping portion; and a resilient portion.
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