Valve actuating mechanism

Claim 1

AN HYDRAULIC LASH ADJUSTER DEVICE COMPRISING A FIXED SUPPORT, A HOLLOW PLUNGER MEMBER SLIDABLY SUPPORTED WITHIN SAID SUPPORT, SAID PLUNGER INCLUDING AN OPEN END AND A CLOSED END FORMED TO PROVIDE A SPHERICAL SEAT, A STOP MEMBER DISPOSED WITHIN SAID SUPPORT AND ADAPTED TO LIMIT THE AXIAL MOVEMENT OF SAID PLUNGER WITHIN SAID SUPPORT, A PLUG MEMBER DISPOSED WITHIN SAID PLUNGER MEMBER AND INCLUDING AN END PORTION PROJECTING THROUGH THE OPEN END OF SAID PLUNGER, SPRING MEANS URGING SAID PLUG INTO ENGAGEMENT WITH SAID STOP MEMBER AND ALSO URGING SAID PLUNGER AXIALLY AWAY FROM SAID SUPPORT AND SAID PLUG MEMBER, THE CLOSED END OF SAID PLUNGER AND SAID PLUG FORMING A FIRST VARIABLE VOLUME FLUID CHAMBER, AN EXPANDABLE SEAL MEMBER INCLUDING A FIRST PORTION SECURED TO THE PLUNGER PROXIMATE THE OPEN END THEREOF AND A SECOND PORTION SECURED TO SAID PLUG WHEREBY SAID PLUNGER, PLUG, AND EXPANDABLE SEAL DEFINE A SECOND VARIABLE VOLUME FLUID CHAMBER, PASSAGE MEANS FORMED THROUGH SAID PLUG MEMBER AND COMMUNICATING SAID FIRST AND SECOND FLUID CHAMBERS, AND A VALVE MEMBER COACTING WITH SAID PASSAGE MEANS TO PERMIT FLOW FROM SAID SECOND TO SAID FIRST FLUID CHAMBER AND PREVENTING FLOW FROM SAID FIRST TO SAID SECOND CHAMBER.