Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes control for power source of drive-means
Patent
1993-07-12
1995-01-03
Noland, Kenneth W.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes control for power source of drive-means
49116, 187335, B66B 1300
Patent
active
053777859
ABSTRACT:
A door closing system for subsequent installation on an automatic sliding door of an elevator car is coupled, at floor stops, via cams and couplings with the hoistway door and is opened and closed together therewith, wherein the closing system prohibits opening of the elevator door from the inside of the car when the car is between two floors, i.e., outside the door opening zone of a floor, wherein a rocker mechanism is affixed to a fixed or movable cam of the clutch and coupling mechanism of the door, the rocker mechanism being tilted by coupler brackets of the hoistway door during normal operation of the door within the door opening zone and, via a transfer means, removes a locking pawl from a hook retainer and thus mechanically frees the door for opening, with the rocker mechanism not being actuatable outside of the door opening zone and blocking the car door via the locking pawl that is kept in a mechanically interlocked position via a compression spring.
REFERENCES:
patent: 18744 (1862-09-01), Waygood et al.
patent: 2003399 (1935-06-01), Tamsitt
patent: 2899021 (1959-08-01), O'Grady
patent: 3721319 (1973-03-01), Hall et al.
patent: 4313525 (1982-02-01), McDonald
patent: 4926974 (1990-05-01), Morris et al.
patent: 4934488 (1990-06-01), Umemura
patent: 5139112 (1992-08-01), Tonna et al.
Patent Abstracts of Japan, vol. 15, No. 160 (M-1105)22, published 22 Apr. 1991.
European Search Report and Annex.
Inventio AG
Noland Kenneth W.
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