公开(公告)号：US3666382A

公开(公告)日：1972-05-30

申请号：US3666382D

申请日：1970-03-24

申请人： ROSEVILLE ENGINEERING INC

发明人： RASMUSSEN ROBERT F

IPC分类号： F04B1/00 ,  F04B53/00 ,  F04B53/10 ,  F04B53/14 ,  F04B53/16 ,  F16J15/00 ,  F04B21/02 ,  F04B39/10

CPC分类号： F04B53/00 ,  F04B1/00 ,  F04B53/103 ,  F04B53/14 ,  F04B53/164 ,  Y10T74/18296 ,  Y10T74/2107

摘要： A HOUSING HAVING THREE IN-LINE CYLINDRICAL OPENINGS FORMED THEREIN WITH AN OUTLET AND INLET IN COMMUNICATION WITH EACH OF SAID OPENINGS, AN INSERT POSITIONES IN EACH OF SAID OPENINGS FOR FORMING OUTELT VALUE MEANS, A SECOND INSERT POSITIONED IN EACH OF SAID OPENINGS FOR FORMING INLET VALVE MEANS, PACKING POSITIONED IN EACH OF SAID OPENINGS AND COOPERATING WITH THE INSERTS TO DEFINE A CYLINDER, AND A PLUNGER MOUNTED IN EACH OF SAID CYLINDERS FOR RECIPROCATING MOVEMENTS. THE FURTHER IMPROVEMENT INCLUDING MEANS SUBJECT TO FLUID OUTLET PRESSURE OPERATING ON THE PACKING TO MAINTAIN A COMPRESSION FORCE ON SAID PACKING. SAID THREE PLUNGERS BEING RECIPROCATED SINUSOIDALLY BY MEANS OF ECCENTRIC MEMBERS ATTACHED TO A DRIVE SHAFT.