Method of improving the landing of a hydraulic elevator car

Details Method of improving the landing of a hydraulic elevator car Method of improving the landing of a hydraulic elevator car

1989-02-16

1991-02-12

Paschall, M. H.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187134, 187 292, B66B 126

Patent

active

049916939

ABSTRACT:
A method of improving the landing of a hydraulic elevator car which responds to slowdown and leveling indicia associated with each floor of a building served by the car. The method, which utilizes signals which are already generated relative to the car traveling past slowdown and leveling indicia, provides an optimum deceleration time TOPT for the car to initiate deceleration and arrive at a leveling zone of a target floor, defined by leveling indicia. The method further delays the initiation of deceleration of the car, after the car reaches slowdown indicia for the target floor, by a predetermined time delay Td. The method determines the actual time TACT for the car to travel between slowdown and leveling indicia for the target floor, and then changes Td, if necessary, in a direction which tends to optimize Td, when TACT - Td is not equal to TOPT.

REFERENCES:
patent: 3743056 (1973-07-01), Zitelli et al.
patent: 4019606 (1977-04-01), Caputo et al.
patent: 4322703 (1982-03-01), Jackson et al.
patent: 4494628 (1985-01-01), Uherek et al.
patent: 4534452 (1985-08-01), Ogasawara et al.
patent: 4715478 (1987-12-01), Nakamura et al.

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