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
1994-04-07
1996-02-27
Noland, Kenneth
Elevator, industrial lift truck, or stationary lift for vehicle
With barrier for regulating access to load support
Including slideably mounted barrier on load support
49409, B66B 1306
Patent
active
054941377
ABSTRACT:
A reciprocating elevator cab door is mounted on a guide track assembly which is fixed to the cab. The cab door is provided with guide rollers which travel along the upper surface of the guide track as the door opens and closes. The door is also provided with at least one upthrust roller which engages the lower surface of the guide track so as to stabilize the door against rocking motion as it moves back and forth over the guide track. The upthrust roller is preferably spring biased against the guide track. Use of the upthrust roller allows greater flexibility of door drive systems.
REFERENCES:
patent: 4099599 (1978-07-01), Randall
patent: 4177881 (1979-12-01), Kappenhagen
patent: 5172518 (1992-12-01), Yoshino
Ahigian Edward E.
Barrett David W.
He Thomas
Jaminet Jerome F.
Kowalczyk Thomas M.
Noland Kenneth
Otis Elevator Company
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