Valve-operating mechanism for internal combustion engines

Claim 1

IN A VALVE-OPERATING MECHANISM FOR INTERNAL COMBUSTION ENGINES, A DRIVEN CAM; A HOUSING ADJACENT TO SAID CAM AND HAVING A GUIDE BORE THEREIN AND AN OIL SUPPLY CHANNEL COMMUNICATING WITH SAID BORE; A VALVE TAPPET INCLUDING A HOLLOW BODY RECIPROCABLY RECEIVED IN SAID BORE AND HAVING AN END WALL IN MOTION-RECEIVING ENGAGEMENT WITH SAID CAM, A LASH-ELIMINATING PLUNGER RECIPROCABLY RECEIVED IN SAID BODY AND DEFINING WITH SAID END WALL A COMPENSATING CHAMBER, SAID PLUNGER FURTHER HAVING A SECOND CHAMBER COMMUNICATING WITH SAID COMPENSATING CHAMBER AND A CUP DEFINING A SOCKET FACING AWAY FROM SAID END WALL, AND ONE-WAY VALVE MEANS PROVIDED BETWEEN SAID CHAMBERS FOR ADMITTING OIL TO SAID COMPENSATING CHAMBER; AND A PUSH ROD HAVING AN END PORTION EXTENDING INTO SAID SOCKET AND ARRANGED TO BIAS SAID PLUNGER IN A DIRECTION TOWARD SAID END WALL, SAID BODY AND SAID PLUNGER DEFINING A FIRST PASSAGE PERMANENTLY CONNECTING SAID CHANNEL WITH SAID SECOND CHAMBER AND A SECOND PASSAGE FOR ADMITTING OIL FROM SAID CHANNEL TO SAID SOCKET, SAID SECOND PASSAGE BEING IN PERMANENT COMMUNICATION WITH SAID SOCKET AND IN INTERMITTENT COMMUNICATION WITH SAID CHANNEL IN RESPONSE TO RECIPROCATION OF SAID BODY.