Safety system for multi-stage lifts

Details Safety system for multi-stage lifts Safety system for multi-stage lifts

1993-01-19

1994-08-16

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Platform with elevating or lowering means

Operating means on platform

182145, 182 18, 182 19, B66B 920

Patent

active

053378580

ABSTRACT:
A lift has a base frame supported on a pair of screw jacks and a pair of support legs when a multi-stage mast on the lift is to be raised. The support legs are slide mounted in guides and each is downwardly biased away from a control switch on the base frame so that the switch is open unless the leg is loaded by the weight of the lift. A transport carriage is mounted to roll on sloped tracks on the base frame and is connected to the base frame by a hydraulic cylinder unit which functions when activated to pull the carriage downwardly into ground engagement to take the load of the lift from the jacks and support legs. A control circuit prevents the mast from being raised while the lift is supported on the carriage.

REFERENCES:
patent: 3240008 (1966-03-01), McMullen
patent: 3372769 (1968-03-01), Jung et al.
patent: 3528675 (1970-09-01), Brown
patent: 3934681 (1976-01-01), Herrell
patent: 4458785 (1984-07-01), Bushnell, Jr.
patent: 4618307 (1986-10-01), Kress et al.

Affiliated with

Also associated with

Rating

Safety system for multi-stage lifts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety system for multi-stage lifts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety system for multi-stage lifts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-945721