By-pass valve for servo steering systems

Details By-pass valve for servo steering systems By-pass valve for servo steering systems

1977-04-05

1979-10-16

Maslousky, Paul E.

Motors: expansible chamber type

Working member position responsive motive fluid control

Venting expanding chamber

91372, 91437, F15B 1522, F15B 910

Patent

active

041709250

ABSTRACT:
A by-pass valve for servo-steering systems to turn off the working pressure in a cylinder chamber of a pressure medium cylinder, whose valve housing includes a valve connection adapted to be connected with the cylinder chamber, a valve connection adapted to be essentially pressure-relieved, and a valve seat for a check valve operatively connected between the two valve connections; the valve housing is thereby adjustable relative to the axis of a steering shaft for purposes of changing the position of its valve seat while the closure member of the check valve is thereby retained by springy means in its normal position closing-off the valve connections with respect to one another and is actuatable into its by-pass position connecting the valve connections with each other by way of a stem movable in unison with the closure member by way of a cam surface fixed for movement in unison with the steering shaft; the valve housing is thereby exclusively rotatable in relation to its valve housing axis but is immovably supported in the directions of the valve housing while the valve seat axis does not coincide with the valve housing axis.

REFERENCES:
patent: 3252380 (1966-05-01), Jablonsky et al.
patent: 3549118 (1970-12-01), Bluder
patent: 3575001 (1971-04-01), Wilson et al.
patent: 3872774 (1975-03-01), Forster et al.
patent: 3905277 (1975-09-01), Rosell
patent: 3924705 (1975-12-01), Sugisawa

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