Elevator – industrial lift truck – or stationary lift for vehicle – With barrier for regulating access to load support – Including slideably mounted barrier on load support
Patent
1995-08-08
1997-08-12
Terrell, William E.
Elevator, industrial lift truck, or stationary lift for vehicle
With barrier for regulating access to load support
Including slideably mounted barrier on load support
187314, 187317, 187313, B66B 1306
Patent
active
056556276
ABSTRACT:
An elevator is provided with a car, an inner door mounted to the car and outer doors mounted to floor openings which define floor zones. The inner door registers with the outer doors when the car is disposed within one of the floor zones. The elevator includes a door restrictor having an electric solenoid mounted to the car so that the inner door cannot be opened more than four inches when the elevator is between floor zones. The electric solenoid has a plunger which is normally in an extended position to block the inner door from opening. Power will only be applied to the electric solenoid to lift the plunger from the extended position to a retracted position to allow the inner door to be fully opened when both the car is disposed within a floor zone and the inner doors are being initiated to move slightly by the main elevator controls. A floor zone sensor is mounted to the car for detecting when the elevator is disposed within one of the floor zones. A door sensor is also mounted to the car for detecting when the inner door is being opened by the main elevator controls. A controller operates the electric solenoid to lift the plunger from the extended position to the retracted position in response to receiving both a door data signal from the door sensor and a floor zone data signal from the floor zone sensor.
REFERENCES:
patent: 2200074 (1940-05-01), Bouton
patent: 2758676 (1956-08-01), Nikazy
patent: 2859835 (1958-11-01), Borden
patent: 2902117 (1959-09-01), Pierson
patent: 2996152 (1961-08-01), Olexson et al.
patent: 3285369 (1966-11-01), Hornung et al.
patent: 4004655 (1977-01-01), Kraft et al.
patent: 4364454 (1982-12-01), Glaser et al.
patent: 4436184 (1984-03-01), Dorman et al.
patent: 5250765 (1993-10-01), Mizuno et al.
ANSI/ASME A17.1-1981, Safety Code for Elevators and Escalator, Section 211, pp. 70-71 Sep. 1981.
Harrison Tom J.
Horne Gregory L.
Advanced Microcontrols, Inc.
Bradley James E.
Terrell William E.
Tran Khoi H.
LandOfFree
Elevator door restrictor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Elevator door restrictor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elevator door restrictor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-154765