Elevator – industrial lift truck – or stationary lift for vehicle – Having specific means contacting or on load support for... – Includes movable contact component on support for engaging...
Patent
1997-03-13
1999-08-03
Cherry, Johnny D.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific means contacting or on load support for...
Includes movable contact component on support for engaging...
187359, 187371, 188 727, 188196V, 188196BA, 188184, 188185, 188 723, 74437, 74422, 74406, B66B 504
Patent
active
059312637
ABSTRACT:
An elevator safety based on having the elevator lift-rod, under the influence of the elevator governor, cause to rotate approximately elliptical cams, called quasi-elliptical cams. The cams are wider in one orientation, just as an ellipse has a major axis, wider than its minor axis. The cams are positioned to push against a brake pad as they rotate so that the major axis of each cam changes orientation with the minor axis. The cams can be shaped to simulate a wedge-type safety, even one using a wedge with multiple ramp angles. With essentially no additional complexity, the cam safety can be designed to operate with a bi-directional governor, one which exerts, usually through an intermediate linkage, force on the lift-rod in either the up or down motion depending on the unintended motion of the elevator.
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"Module 9.1 Carframes and Counterweights (High-Rise)," from Otis NAO Technical Training Manual, pp. 1-12.
A page from "For gears as unique as your needs," Winzeler, Inc.
A page from "Module 10.0" of Otis NAO Technical Training Handout Manual 1986, p. 13.
"Elevator Safety System" from a 1988 presentation delivered by Otis Elevator personnel, pp. 1-15.
"Module 9.0 Carframes and Counterweights" from Otis NAO Technical Training Handout Manual, pp. 1-16.
Cooney Anthony
Ericson Richard J.
Cherry Johnny D.
McAllister Steven B.
Otis Elevator Company
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