Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1977-05-10
1979-01-16
Paperner, L. J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 843, 187 85, 187 867, 254 3B, B66F 722
Patent
active
041345010
ABSTRACT:
A lift for servicing the running gear and underside of a vehicle, embodies a pair of parallel channel-shaped base beams connected at their ends by extensible members. A pair of vehicle-receiving platforms of channel-shape are hinged to and lie directly above and parallel to the base beams. The base channels open upwardly, while the platform channels open downwardly. Within the channels and between each pair of base and platform beams is pivotally mounted a folded lift unit including a fluid pressure applying device having a piston and rod, a lever mechanism including three folded arms and links, a booster fluid pressure device and a safety mechanism. Actuation of the lift units causes them to unfold and elevate the platform beams with a vehicle loaded thereon, to an elevated and inclined position. The safety mechanism includes a rack secured to and moveable with the piston rod, a housing secured to the cylinder of the pressure fluid device, a latching pawl pivoted in the housing, and a tension spring retaining the pawl in engagement with the teeth of the rack at all times except when a second pressure fluid device is actuated to overcome the tension spring and move the pawl away from the rack to permit lowering of the platform beams.
REFERENCES:
patent: 2201179 (1940-05-01), Jackson et al.
patent: 2471901 (1949-05-01), Ross
patent: 2602633 (1952-07-01), Reedy
patent: 3315763 (1967-04-01), Harvey et al.
patent: 3563345 (1971-02-01), MacMillan et al.
patent: 3838783 (1974-10-01), Tune
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