Valve arrangement for servo-steering of vehicles
AssigneeZahnradfabrik Friedrichshafen AG
InventorGunther Gluck
Life of this patent
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Abstract
A distributor valve is reset to a neutral position relative to a piston valve in a servo-steering gear by rotational adjustment of a piston rod connected to the piston and extending through a non-rotatable rack externally of the housing enclosing the piston and the distributor valve. The distributor valve is locked in adjusted position at a location externally of the housing relative to one end of the rack to which it is threadedly connected internally of the housing.
Claims5
For use with a vehicle steering device having a non-rotatable rack (3), a double-acting piston (14), a housing (5) within which the piston is reciprocally mounted, and a piston rod (9) attached to and reciprocable with the piston extending externally of the housing, a distributor valve for controlling the supply of pressurized fluid to the housing in response to axial movement of the rack, including a slide valve element (12) operatively connected to the rack, valve passage means (21, 22, 44) formed in the piston in operative relation to the slide valve element, prestressed spring means (35) for yieldably holding the slide valve element in a neutral position relative to the piston, and means for adjusting the neutral position of the slide valve element relative to the rack by torque applied to the piston rod externally of the housing.
Dependencies are inferred from the claim text.