Door controller for mass transit vehicles

Details Door controller for mass transit vehicles Door controller for mass transit vehicles

1991-04-19

1992-07-28

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

318467, 105341, E05F 1520

Patent

active

051343509

ABSTRACT:
A door opening system particularly suited for doors on mass transit vehicles. Through position sensing, electronic circuitry, mechanical linkage, brushless motor and pwm amplifier; opens and closes one or more doors, inhibits vehicle from running when door is open, allows vehicle to run when door is closed and not pushed back, stops moving vehicle when door opens beyond the push back position. This system does not depend on the mechanical linkage that opens and closes the door to sense the position of the door.

REFERENCES:
patent: 3575604 (1971-04-01), Smith
patent: 3824538 (1974-07-01), Slemp
patent: 4679508 (1987-07-01), Fruehan et al.
patent: 4896050 (1990-01-01), Shin-chung
patent: 4981084 (1991-01-01), Templeton et al.
patent: 5039925 (1991-08-01), Schap

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