Rocker arm oiling system

Claim 1

A HYDRAULIC TAPPET INCLUDING A PLUNGER HAVING AN OPEN END; A PUSH ROD SEAT MEMBER CLOSING SAID OPEN END, AND HAVING AN OUTER SURFACE WITH A PUSH ROD SEAT, AN INNER SURFACE, AND A PASSAGEWAY THEREBETWEEN; A SURFACE AREA ON SAID INNER SURFACE CIRCUMSCRIBING SAID PASSAGEWAY AND PROJECTING AXIALLY INWARDLY OF SAID PLUNGER WITH RESPECT TO THE REMAINDER OF SAID INNER SURFACE; A RESILIENT DISC ADJACENT SAID SURFACE, INCLUDING ORIFICE MEANS NON-COINCIDENT WITH SAID PASSAGEWAY; CIRCUMFERENTIAL CONTACT BETWEEN SAID SURFACE AND DISC NORMALLY CLOSING DOWN FLOW FROM SAID ORIFICE MEANS TO SAID PASSAGEWAY; EDGES OF SAID PROJECTING SURFACE AREA ADAPTED TO CONSTANTLY ENGAGE SAID DISC AND CENTRALLY DEFORM THE SAME BETWEEN A GENERALLY FLAT CONDITION AND A DISHED CONDITION TO FORCE PORTIONS OF SAID DISC AWAY FROM PORTIONS OF SAID SURFACE AREA; AND A RECESSED AREA AROUND AT LEAST PART OF SAID SURFACE AREA EXTENDING RADIALLY TOWARD SAID PASSAGEWAY FURTHER THAN THE OUTERMOST EDGES OF SAID SURFACE AREA, THEREBY BEING OUT OF CONTACT WITH SAID DISC AND CREATING A TEMPORARY FLOW PASSAGE BETWEEN SAID SURFACE AREA AND SAID DISC WHEN THE LATTER IS DEFORMED BY EDGES OF SAID PROTRUDING SURFACE AREA.