Intermittent pressure injector

Claim 1

AN INTERMITTENT PRESSURE INJECTOR COMPRISING: A HEAD HAVING A FLUID PASSAGE EXTENDING THERETHROUGH; A BASE; AN ELONGATED CYLINDRICAL SLEEVE; A HOLLOW STUD THREADED AT OPPOSITE ENDS AND THREADEDLY ENGAGING SAID HEAD AND SAID BASE TO CLAMP SAID SLEEVE THEREBETWEEN AND FORM A RESERVOIR; SAID STUD HAVING A PLUNGER BORE AT THE BASE ENGAGING END THEREOF AND COMMUNICATING WITH A CYLINDER BORE FORMED IN SAID BASE, A PLUNGER SLIDABLY MOUNTED IN SAID PLUNGER BORE AND A PISTON FORMED INTEGRAL THEREWITH SLIDABLY MOUNTED IN SAID CYLINDER BORE; A BLEED INLET PORT ADAPTED TO RECEIVE BLEED FLUID UPON THE OPERATION OF A FLUID OPERATED DEVICE TO EXTEND SAID PISTON AND PLUNGER, PERFORATIONS IN SAID PLUNGER BORE NEAR SAID BASE AND COMMUNICATING WITH SAID RESERVOIR WHEREBY LIQUID MAY ENTER SAID PLUNGER BORE, SAID PLUNGER UPON BEING EXTENDED SHUTTING OFF THE FLOW OF LIQUID THROUGH SAID PERFORATIONS AND FORCING THE LIQUID IN SAID PLUNGER BORE THROUGH SAID HOLLOW STUD MEMBER TO BE INJECTED INTO SAID FLUID PASSAGE BY LIQUID CONVEYING MEANS FORMED IN SAID HEAD.