Elevator – industrial lift truck – or stationary lift for vehicle – With barrier for regulating access to load support – Includes motor or motor driven linkage for shifting barrier
Reexamination Certificate
2007-01-02
2007-01-02
Matecki, Kathy (Department: 3654)
Elevator, industrial lift truck, or stationary lift for vehicle
With barrier for regulating access to load support
Includes motor or motor driven linkage for shifting barrier
C187S316000, C187S318000, C187S320000, C187S321000, C049S120000
Reexamination Certificate
active
10373291
ABSTRACT:
A control system for a motorized freight elevator landing door in which all of the doors in a single line of a hoistway are controlled with one set of proximity sensors carried on the elevator car. The sensors signal a controller that operates electric motors for opening and closing the landing door where the car has stopped. The door operating motors are two speed units and the sensors and controller are arranged to operate the motors at high speed during most of the travel in opening or closing movement and at reduced speed at the end of movement. The controller applies power to the motor for a short period after the door is fully closed or open to stall the motors and thereby dampen any rebound motion.
REFERENCES:
patent: 1378017 (1921-05-01), Fogal et al.
patent: 1864667 (1932-06-01), Peelle
patent: 1927559 (1933-09-01), Talen
patent: 1932198 (1933-10-01), Talen
patent: 1943042 (1934-01-01), Schweig
patent: 1989148 (1935-01-01), Peelle
patent: 2012440 (1935-08-01), Waldman
patent: 2014735 (1935-10-01), Schweig
patent: 2017736 (1935-10-01), Schweig
patent: 2020336 (1935-11-01), Schwartz
patent: 2175906 (1939-10-01), McCormick
patent: 2235384 (1941-03-01), Radeeff
patent: 2275643 (1942-03-01), Norton et al.
patent: 2286003 (1942-06-01), Norton et al.
patent: 2306493 (1942-12-01), Norton et al.
patent: 2500072 (1950-03-01), Harmon
patent: 2526503 (1950-10-01), Raque
patent: 2579017 (1951-12-01), Schweig
patent: 2673316 (1954-03-01), Doeg et al.
patent: 2937867 (1960-05-01), Schweig
patent: 4750592 (1988-06-01), Watt
patent: 5587565 (1996-12-01), Schroder-Brumloop et al.
patent: 5878846 (1999-03-01), O'Donnell
patent: 6435315 (2002-08-01), Zaharia
Dziwak Zygmunt
Kairis David E.
Lajeunesse Richard W.
Reynolds Steven P.
Matecki Kathy
Pico Eric E.
The Peelle Company Ltd.
LandOfFree
Freight elevator landing door control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Freight elevator landing door control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Freight elevator landing door control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3774859