Land vehicles – Wheeled – Articulated vehicle
Patent
1976-11-22
1978-09-12
Pekar, John A.
Land vehicles
Wheeled
Articulated vehicle
280764, B60D 114
Patent
active
041132742
ABSTRACT:
A pneumatic jack assembly is pivotally secured to the tongue of a single axle trailer to assist an operator in lifting the tongue for engagement with the coupling member of a tow truck. The jack assembly includes a ground-engaging strut pivotally secured to the tongue and a pneumatic power assembly transversely disposed with respect to the tongue. The power assembly includes a cylindrical housing for receiving compressed air and a piston operably coupled to the housing for transmitting a mechanical force in response to power derived from the compressed air. The housing is pivotally secured to the tongue and the piston is pivotally secured to the strut to permit rotational movement of the housing and tongue relative to each other and relative to the strut as the tongue is lifted by the force exerted by the piston. In a preferred embodiment, the penumatic power assembly derives its operating energy from a source of compressed air carried by the trailer.
REFERENCES:
patent: 3844582 (1974-10-01), Cook
patent: 3874696 (1975-04-01), Gardner
patent: 3976284 (1976-08-01), Hupp
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