Land vehicles – Wheeled – Attachment
Patent
1977-05-10
1978-10-03
Oresky, Lawrence J.
Land vehicles
Wheeled
Attachment
212145, B60S 900
Patent
active
041180542
ABSTRACT:
In a machine for use on uneven terrain having a stabilizing beam providing a lateral extension of the chassis of the machine and having a support jack mounted at each end thereof and movable relative thereto between an operating position in which the jack is vertical and bears on the ground through the intermediary of a sole plate attached to the end of the piston rod of the support jack and a position in which the jack is substantially horizontal and located within the stabilizing beam, a double actuating actuator jack is provided with its cylinder pivoted to the stabilizing beam and its piston rod pivoted to the cylinder of the support jack, and an hydraulic actuating device is provided comprising supply and take-off conduits for pressurized liquid connected to the chambers of the support and actuator jacks through three pressure sensitive non-return valves such that during movement of the support jack to its operating position, the support jack is extended only when the actuator jack is fully extended and during movement of the support jack to its stowed position, the actuator jack is not retracted until the support jack is fully retracted.
REFERENCES:
patent: 2926889 (1960-03-01), Obes
patent: 3007717 (1961-11-01), Noly
patent: 3550506 (1970-12-01), Gardenhour
patent: 3743108 (1973-07-01), Visser
patent: 3801068 (1974-04-01), Kopas
patent: 3856152 (1974-12-01), Parrett et al.
patent: 3901395 (1975-08-01), King
patent: 3945666 (1976-03-01), Fritsch
Creusot-Loire
Oresky Lawrence J.
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