US 4,046,226 AGranted

Elevator system for transporting wheelchair patients

AssigneeFlinchbaugh-Murray Corporation

InventorHenry K. Flinchbaugh

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Abstract

An elevator platform rides on parallel tracks which may be adapted for vertical or inclined conveyance. Each track is slotted along its length, through which slot the platform extends and is connected to a trolley driven by a continuous chain. Each track is tubular and generally rectangular, and each encloses another tubular, rectangular member which provides a space for the chain return and electrical conduits, and which provides support for the trolley. Each trolley has an upper pair of rollers bearing against the inside of the hollow track straddling the slot, and lower rollers bearing against the top surface of the inner tubular member. Interrupt and safety precautions are provided based on chain breakage, excessive speed, overload, or contact with foreign objects in the path of the elevator platform.

Claims12

Dependent claims

An elevator system comprising:

a. at least one track means including,
i. a first tubular member having a longitudinal slot along an upper first surface, and
ii. a lower second tubular member within and along a second surface of said first member opposite said first surface;
b. trolley means within the first tubular member of said track means, said trolley means having an upper roller means bearing against the inside of said first surface of said first tubular member, and a lower roller means bearing against an upper outer surface of said second tubular member;
c. an elevator platform connected to and movable with said trolley means through said slot in said first tubular member;
and
d. a continuous chain drive including,
i. drive means at an extremity of said track means, and
ii. a chain, powered by said drive means and having its ends respectively connected to opposite ends of said trolley means, said chain passing through said second tubular member and providing upward and downward movement for said platform.

6 more elements

Dependencies are inferred from the claim text.