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
1995-11-29
1999-01-26
Nappi, Robert
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
187282, 187414, B66B 140, B66B 516
Patent
active
058628860
ABSTRACT:
To prevent elevator rope stretch effects when a horizontally transferable elevator cab (18) is rolled onto and off of an elevator car frame (10), an elevator car/floor lock (31) includes a bolt (47) which extends across the interface between the car frame and the building and engages a strike (39). Jack screw (44) and solenoid (60) embodiments are shown. To take the weight off the lock bolts so that they may be retracted to permit moving the car frame vertically in the hoistway, strain gages (64, 65) or load sensors (62, 63) provided in or adjacent the bolts sense the weight supported thereby, and a pretorque program (FIG. 6) provides armature current to the hoisting motor to raise or lower the car frame sufficiently to reduce the load on the bolts to nil.
REFERENCES:
patent: 1398216 (1921-11-01), Barnette
patent: 3407904 (1968-10-01), Trollope
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patent: 4754850 (1988-07-01), Caputo
patent: 5157228 (1992-10-01), Ackermann et al.
patent: 5228537 (1993-07-01), Pfleger et al.
patent: 5424498 (1995-06-01), Spiebauer et al.
patent: 5583326 (1996-12-01), Sors
patent: 5635688 (1997-06-01), Kantesaria et al.
Barker Frederick H.
Bennett Paul
Bittar Joseph
Cooney Anthony
McCarthy Richard C.
Nappi Robert
Otis Elevator Company
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