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US 5,632,357 AGranted
Combined stairs and person hoist
OwnerVigbj.o slashed.rn Matreinventor
Life of this patent
Estimating the term…
Abstract
A combined stairway and hoist so constructed that it can be adapted in many fields of use, especially for handicapped people in buildings and public transportation. The stairway together with the platform can be raised and lowered by means of parallel stays which at one end are pivotally connected to a support at the upper end of the stairway, the parallel stays along their length being pivotally connected to a number of additional stays which are connected to respective steps and are vertical in operating position.
Claims10
A combined stairway and hoist apparatus, comprising:
- a stairway having a first end and a second end;
- lifting means for raising and lowering said stairway at said first end thereof;
- said stairway having steps so designed that they at all times during raising and lowering of the stairway remain horizontal with a respective mutual equal rise and form a flush surface when said stairway is in a horizontal position;
- support means at said second end of said stairway;
- parallel stays each having a respective first end pivotally connected to said support means, said parallel stays extending along said stairway;
- additional stays each having a first and a second end, said first end of said additional stays being pivotally connected to one of said parallel stays and said second end of said additional stays being connected to one of said parallel stays;
- said additional stays being essentially vertical in an operating position;
- a horizontal platform at said first stairway end;
- means interconnecting said platform and said stairway so that said stairway steps form a planar surface flush with said platform when said stairway is in a horizontal position.
6 more elements
A combined stairway and hoist apparatus, comprising:
- a stairway which, by a lifting means, may be raised and lowered at least at one end, and which is designed so that steps of said stairway all the time are horizontal during raising and lowering movement;
- the stairway, when in a horizontal position, forming a planar surface which is flush with a raisable and lowerable platform;
- said platform being interconnected with said stairway at a lower end of said stairway;
- said stairway, together with said platform raisable and lowerable by means of parallel stays which, at one end are pivotally connected to a support means provided at an upper end of the stairway, the parallel stays along their length being pivotally connected to a number of additional stays which are connected to respective steps and are essentially vertical in operating position;
- wherein:
- said parallel stays are arranged below said steps;
- said support means are constituted by a floor structure at said upper end of said stairway, and said parallel stays are further connected to said platform via a movement-transferring arm system.
4 more elements
Dependencies are inferred from the claim text.