Expansible chamber devices – Relatively movable working members – Rigid stem on first working member portion extends through...
Patent
1975-03-20
1977-01-11
Maslousky, Paul E.
Expansible chamber devices
Relatively movable working members
Rigid stem on first working member portion extends through...
92 63, 92 75, 92129, 92168, F01B 710, F16J 110
Patent
active
040021068
ABSTRACT:
The present invention is related to a piston-cylinder mechanism for the pivoting or tilting of the platform of a vehicle mounted goods elevator between a raised resting position and a lowered working position, including at least one piston rod slidably movable relative to a piston in the mechanism and uniformly movable by means of a driver together with the piston between a bottom position wherein the platform is lowered and an intermediate position determined by a stop limiting the piston travel, said piston rod being movable relative to the piston between said intermediate position and a position of maximum extension out of the cylinder wherein the platform is swung up, wherein a spring, adapted to be supplied with spring force when the piston rod is moved towards its position of maximum extension out of the cylinder, urges the piston rod from said position in a direction towards the bottom position thereby to initiate at all times a lowering of the platform.
REFERENCES:
patent: 787480 (1905-04-01), Tanner
patent: 2876744 (1959-03-01), Yuhaniak
patent: 3057205 (1962-10-01), Howard et al.
patent: 3623694 (1971-11-01), Goldberg
Bispgardens Svets & Smide AB
Maslousky Paul E.
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