Anti-creep brake mechanism

Claim 1

CONTROL VALVE MEANS COMPRISING A HOUSING HAVING INLET AND OUTLET PORTS THEREIN, MEANS FOR CONTROLLING DISPLACEMENT AND RETURN FLOW OF PRESSURE FLUID BETWEEN SAID PORTS INCLUDING AN ABUTMENT MEMBER IN SAID HOUSING HAVING A CENTRALLY LOCATED OPENING THEREIN NORMALLY IN OPEN PRESSURE FLUID COMMUNICATION WITH SAID PORTS, AT LEAST ONE PASSAGE MEANS EXTENDING THROUGH SAID MEMBER AND RADIALLY DISPOSED RELEVANT TO SAID MEMBER OPENING, PLUNGER MEANS SLIDABLE IN SAID HOUSING BETWEEN SAID INLET PORT AND MEMBER, EXTENSION MEANS ON SAID PLUNGER MEANS, SEALING MEANS IN SAID HOUSING BETWEEN SAID OUTLET PORT AND MEMBER, AN OPENING IN SAID SEALING MEANS FOR RECEIVING SAID EXTENSION MEANS AND SUBSTANTIALLY ALIGNED WITH SAID MEMBER OPENING, RESILIENT MEANS BIASED BETWEEN SAID HOUSING AND SEALING MEANS AND NORMALLY URGING SAID SEALING MEANS INTO SEALING ENGAGEMENT WITH SAID MEMBER TO CLOSE SAID PASSAGE MEANS AND PREVENT RETURN FLOW OF DISPLACED PRESSURE FLUID THERETHROUGH, ELECTRO-RESPONSIVE MEANS FOR ATTRACTING SAID PLUNGER MEANS INTO MAGNETIC ENGAGEMENT WITH SAID MEMBER, SAID EXTENSION MEANS BEING MOVABLE THROUGH SAID MEMBER OPENING AND SEALING MEANS OPENING INTO PERIPHERAL SEALING ENGAGEMENT WITH SAID SEALING MEANS TO PREVENT RETURN FLOW OF DISPLACED PRESSURE FLUID THROUGH SAID MEMBER OPENING, OTHER PASSAGE MEANS IN SAID PLUNGER MEANS AND EXTENSION MEANS BETWEEN SAID PORTS, AND UNI-DIRECTIONAL VALVE MEANS IN SAID OTHER PASSAGE MEANS RESPONSIVE TO A PRESSURE DIFFERENTIAL BETWEEN SAID PORTS ABOVE A PREDETERMINED MAGNITUDE TO PERMIT PASSAGE OF LIMITED RETURN FLOW OF DISPLACED PRESSURE FLUID THROUGH SAID OTHER PASSAGE MEANS.