Voorhies

Claim 1

IN COMBINATION IN A HYDRAULIC LASH ADJUSTER, A CYLINDER HAVING A CLOSED END AND AN OPEN END, A HOLLOW PLUNGER MOUNTED IN SAID CYLINDER FOR RECIPROCATION, MEANS TO RETAIN SAID PLUNGER IN SAID CYLINDER, MEANS POSITIONED BETWEEN THE PLUNGER AND THE CLOSED END OF THE CYLINDER AND BIASED TO MOVE THE PLUNGER OUTWARDLY, SAID PLUNGER HAVING AN OPEN END, A VALVE POSITIONED TO CLOSE SAID OPEN END, A VALVE RETAINER MOUNTED ON THE PLUNGER AND ABOUT THE VALVE, A SPRING BEARING UPON SAID VALVE AND BIASED TO SEAT SAID VALVE, MEANS DEFINING A RESERVOIR SPACE ABOUT THE EXTERIOR OF SAID PLUNGER, SAID MEANS COMPRISING A BAND OF KNURLING EXTENDING ABOUT THE EXTERIOR OF SAID PLUNGER, A PASSAGE CONNECTING SAID RESERVOIR SPACE WITH THE INTERIOR OF SAID PLUNGER, SAID PLUNGER SHAPED TO PROVIDE A RECEIVING SOCKET FOR A PUSH ROD IN ITS UPPER END, A BAND OF KNURLING POSITIONED ABOUT THE EXTERIOR OF SAID PLUNGER ADJACENT ITS UPPER END, AND PASSAGE MEANS EXTENDING FROM SAID SOCKET TO SAID BAND OF KNURLING.