Rotatable poppet valve

Claim 1

IN A DEVICE FOR TRANSMITTING SPRING OPPOSED MOVEMENT TO A POPPET VALVE FROM A VALVE ACTUATOR WHOSE OPERATIVE MOTION HAS A SUBSTANTIAL COMPONENT LATERALLY OF THE DIRECTION OF VALVE OPENING MOVEMENT, A VALVE STEM, A SPRING RETAINING WASHER HAVING A TAPERED BORE ENCIRCLING AND SPACED FROM THE VALVE STEM, AND RADIALLY ABUTTING KEEPER MEMBERS HAVING TAPERED EXTERNAL SIDE SURFACES SEATED IN SAID WASHER BORE, SAID STEM HAVING AN END FACING THE VALVE ACTUATOR AND AN EXTERNALLY RELIEVED AREA DEFINING A SHOULDER LONGITUDINALLY SPACED FROM AND FACING OPPOSITELY FROM SAID END, AT LEAST ONE OF SAID KEEPER MEMBERS HAVING AN END PORTION OVERLYING SAID VALVE STEM END AND DRIVABLY ENGAGING THE VALVE ACTUATOR DIRECTLY, AND HAVING A RIB SPACED FROM SAID PORTION AND UNDERLYING SAID STEM SHOULDER WITHIN SAID RELIEVED AREA, THE SPACING BETWEEN SAID PORTION AND RIB BEING GREATER THAN THE SPACING OF SAID SHOULDER FROM SAID STEM END AND THE DEPTH OF SAID RELIEVED AREA BEING SUFFICIENT TO PRECLUDE BOTTOMING OF SAID RIB THEREIN THROUGHOUT THE COMPONENT OF LATERAL MOTION OF THE ACTUATOR RELATIVE TO THE VALVE.