Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1991-05-15
1992-05-12
Olszewski, Robert P.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 871, 187 872, 414921, 414546, 280166, B66B 1122
Patent
active
051119129
ABSTRACT:
A drive assembly (250) for use with a platform lift. The assembly includes a set of linkage arms (30, 32) connected between the platform (22) and a stable carriage arm (34). A pair of sprockets (50, 60) connected to the carriage arm at the linkage arm pivot points control the rotation of the linkage arm and the movement of the platform relative to the carriage arm. The sprokets are connected together by a leaf chain assembly (70) so as to show rotation of the sprockets in a simultaneous movement of the linkage arms. A compression spring (260) is attached at one end to the leaf chain assembly and at the other end to the carriage arm. When the platform is moved into the top-most position, the spring is compressed. The platform is lowered by allowing the spring to expand so that it actuates the leaf chain assembly so as to cause the linkage arms to move past their top-center positions; once the linkage arms move past their top-center positions, gravity can then force the platform downwards.
REFERENCES:
patent: 872902 (1907-12-01), Comer et al.
patent: 883443 (1908-03-01), Berg
patent: 924537 (1909-06-01), Crofut, Jr.
patent: 948874 (1910-02-01), Crofut, Jr.
patent: 1105202 (1914-07-01), King
patent: 1419992 (1922-06-01), Szczurek
patent: 2256389 (1941-09-01), Griffith
patent: 4273498 (1981-06-01), Dickhart et al.
patent: 4499970 (1985-02-01), Hussey
patent: 4823895 (1989-04-01), Kimball
Hogan Mfg., Inc.
Olszewski Robert P.
Reichard Dean A.
LandOfFree
Spring-loaded drive assembly for a wheelchair lift does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spring-loaded drive assembly for a wheelchair lift, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spring-loaded drive assembly for a wheelchair lift will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2423709