Back to results
US 5,964,159 AGranted
Inclined or vertical lift
OwnerWilfried Heininventor
Life of this patent
Estimating the term…
Abstract
A lift for inclined or vertical operation has a pair of guide rails that run parallel to one other, on which guide rollers run that are mounted on swivel plates so that they can swivel and contact the rails from opposite sides. At least one guide roller on each swivel plate is designed as a drive roller. The periphery of the drive roller is pressed against a respective engagement area of the rail by a spring force in such a way that the drive force of the drive roller is primarily transferred to the rail by friction.
Claims14
A lift for a handicapped person comprising:
- first and second vertically spaced apart tubular guide rails arranged to run parallel to one another at constant gauge and, along at least along a substantial part of their length, being inclined relative to the ground;
- first and second roller supports;
- a first pair of guide rollers mounted on said first roller support, on opposite sides of said first guide rail, wherein at least one guide roller of said first pair is a first drive roller;
- a second pair of guide rollers mounted on said second roller support, on opposite sides of said second guide rail, wherein at least one guide roller of said second pair is a second drive roller;
- means for driving said first drive roller;
- means for driving said second drive roller;
- at least one spring for pressing said first and second drive rollers against said first and second guide rails for creating a continuous contact force between all said guide rollers and said guide rails;
- and
- wherein the drive forces of said drive rollers are transferred to said first and second guide rails, respectively, substantially entirely through frictional engagement between said drive roller and its respective guide rail due to said contact force.
6 more elements
Dependencies are inferred from the claim text.