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| Number | Title | Issue Date |
| 6173737 | Bidirectional flow control valve A bidirectional flow control valve for use in a hydraulic system to regulate fluid flow in either direction of flow through the valve. The valve includes a housing, a slidable sleeve, two opposite springs, and two opposite cap nuts. The housing has a bore... | 01/16/2001 |
| 5944473 | Locking wheelchair lift A wheelchair lift, as for use with a vehicle, includes a platform for receiving a wheelchair carried as a pivot mechanism including two pairs of cooperating parallelogram structures adopted to be affixed to a vehicle for moving the platform between loadin... | 08/31/1999 |
| 5944388 | Removable vehicle seat A removable vehicle seat is provided that allows for easy removal and reattachment of a vehicle seat to the floor of a vehicle. The design provides a simple structure which permits quick removal and reattachment by a single person but which is stable enou... | 08/31/1999 |
| 5832555 | Compact moveable ramp assembly A compact movable ramp assembly is provided that can be securely stored beneath a vehicle floor and safely and reliably operated. The ramp assembly comprises a mounting structure having a series of top panels that form the vehicle floor. The ramp assembly... | 11/10/1998 |
| 5794381 | Selectively engageable motor drive assembly A selectively engageable motor-drive assembly operable for moving a vehicle door or ramp to enable manual operation or motorized operation is provided, having a motor, a pulley drawing a cable attached to the door or ramp, a torque-multiplying arrangement... | 08/18/1998 |
| 5636399 | Movable ramp assembly A movable ramp assembly is provided that can be securely stored and safely and reliably operated. The ramp assembly includes a platform that is conveniently stored to travel with a vehicle and deployed in a motion pattern to allow the passage of passenger... | 06/10/1997 |
| 5613321 | Releasable drive mechanism A releasable drive mechanism is provided, having a sprocket and gear rotatable about a central axis, the gear being rotatably secured to a shaft extending along the central axis. The sprocket and the gear are each configured to provide a coplanar portion ... | 03/25/1997 |
| 5605431 | Locking wheelchair lift A wheelchair lift, as for use with a vehicle, includes a platform for receiving a wheelchair carried as a pivot mechanism including two pairs of cooperating parallelogram structures adopted to be affixed to a vehicle for moving the platform between loadin... | 02/25/1997 |
| 5556250 | Vehicle lifts A vehicle lift, as for wheelchairs, incorporates a horizontally disposed load platform pivotally affixed to a laterally spaced-apart parallelogram elevating frame which is in turn pivotally affixed to a carriage, allowing a composite travelling assembly (... | 09/17/1996 |
| 5533594 | Chairlift with positioning carriage and swivel mechanism with safety interlock A chairlift providing a seat for transporting a passenger along a rail inclined at a substantially uniformly angle, includes a chair assembly with a base housing a motor unit and a carriage supporting the chair assembly in a substantially upright position... | 07/09/1996 |
| 5445488 | Locking wheelchair lift A wheelchair lift, as for use with a vehicle, includes a platform for receiving a wheelchair carried as a pivot mechanism including two pairs of cooperating parallelogram structures adopted to be affixed to a vehicle for moving the platform between loadin... | 08/29/1995 |
| 5373915 | Passenger lift with an electric safety interlock A passenger lift incorporates an electronic safety interlock to prevent all movement of the lift, until a restraining belt is fastened. In some embodiments, the interlock is a normally open electric switch located inside the restraining belt's buckle. The... | 12/20/1994 |
| 5308215 | Passenger lift movable at variable speeds A hydraulic drive passenger lift with distinct lifting "up and down" (loading, unloading) and "fold-unfold" (storage) motion patterns, includes a flow control structure that accommodates various hydraulic flows, somewhat unrestricted for "up-and-down" mov... | 05/03/1994 |
| 5234311 | Wheelchair lift with adjustable posts An adjustable wheelchair lift for a vehicle wherein the lift includes a platform, a mounting structure having two spaced apart, vertically extending, support posts mountable to the vehicle, a linkage for moving the platform to and from the vehicle and a c... | 08/10/1993 |
| 5228538 | Passenger lift with an electric safety interlock A passenger lift incorporates an electronic safety interlock to prevent all movement of the lift, until a restraining belt is fastened. In some embodiments, the interlock is a normally open electric switch located inside the restraining belt's buckle. The... | 07/20/1993 |
| 4977981 | Wayside lift An apparatus for providing access by a handicapped person from a landing to a guideway mounted vehicle includes a support structure having a pedestal portion and a housing extending upward from the pedestal; a lift, mounted in a lift opening of the suppor... | 12/18/1990 |
| 4953665 | Wayside lift An apparatus providing access by a handicapped person from a landing to a guideway mounted vehicle includes a support structure having a pedestal portion and a housing extending upward from the pedestal. A lift, mounted in a lift opening of the support st... | 09/04/1990 |
