Implements or apparatus for applying pushing or pulling force – Vehicle attached jack – Hydraulic or pneumatic
Patent
1987-06-17
1989-09-12
Smith, James G.
Implements or apparatus for applying pushing or pulling force
Vehicle attached jack
Hydraulic or pneumatic
340 52R, 254 89H, B66F 902
Patent
active
048652954
ABSTRACT:
A self-deploying stabilizing support jack is presented which stabilizes and positions a recreational vehicle or trailer. The support jack comprises a bracket, a two-cylinder, lift arms and a stabilizing sleeve. The lift arms and cylinder are attached to the bracket at separate, offset first and second points so that when the ram of the cylinder contacts the foot of the lift arm, the entire apparatus is raised to a horizontal position. A stabilizing sleeve attached to the lift and surrounding the cylinder stabilizes the the device from lateral movement. An intermediate third pivot point in the lift arm helps reduce stress upon raising. Also provided is an automatically released pressure valve for the cylinder and a signalling device to warn the operator when the support jack is in the deployed position. A safety circuit also automatically raises any support jack that is not in the horizontal safety position should the ignition be turned to the "ON" position.
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U.S. Patent 2,837,312 Troche 1958 Class 254 Sub 86.
Holmes David
Smith James G.
Weber Don W.
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