Crosshead assembly

Claim 1

A CROSSHEAD ASSEMBLY CAPABLE OF CONTROLLING THE FLOW OF A FLUID INTO AND OUT OF AN ENCLOSURE AND OF CONTROLLING THE CIRCULATION OF SAID FLUID WITHIN SAID ENCLOSURE THROUGH THE MOTION OF A MEMBER MOVABLE WITHIN SAID ENCLOSURE, COMPRISING IN COMBINATION (A) MOTOR MEANS ADAPTED TO ROTATE A MOTOR SHAFT; (B) A MOTOR HOUSING; (C) A CRANKCASE BLOCK AFFIXED IN FLUID-TIGHT RELATIONSHIP TO SAID ENCLOSURE; (D) A CRANKCASE HOUSING FORMING WITH SAID MOTOR HOUSING AND SAID CRANKCASE BLOCK A FLUID-TIGHT CRANKCASE; (E) FLUID CONDUIT MEANS ADAPTED TO CONDUCT HIGH-PRESSURE FLUID INTO AND LOW-PRESSURE FLUID OUT OF SAID ENCLOSURE; (F) MECHANICALLY ACTUATED HIGH-PRESSURE INLET AND LOWPRESSURE EXHAUST FLUID CONTROL VALVES ASSOCIATED WITH SAID FLUID CONDUIT MEANS, LOCATED WITHIN SAID CRANKCASE BLOCK AND ADAPTED TO CONTROL THE FLOW OF SAID HIGH-PRESSURE AND SAID LOW-PRESSURE FLUID; (G) A DRIVING ROD ASSOCIATED WITH SAID MOVABLE MEMBER IN SAID ENCLOSURE AND EXTENDING THROUGH SAID CRANKCASE BLOCK INTO SAID CRANKCASE; (H) AN AUXILIARY SHAFT AFFIXED TO SAID MOTOR SHAFT, THROUGH FIRST COLLAR MEANS, AND ECCENTRICALLY MOUNTED THERETO; (I) SECOND COLLAR MEANS MOUNTED ON SAID MOTOR SHAFT ADJACENT TO SAID FIRST COLLAR MEANS AND ECCENTRIC THERETO; (J) DRIVING ROD MOVING MEANS WITHIN SAID CRANKCASE AND COMPRISING A SCOTCH YOKE AND AN ASSOCIATED BEARING CAM MOUNTED ON SAID AUXILIARY SHAFT; (K) INLET VALVE ACTUATING MEANS AFFIXED TO SAID FIRST COLLAR MEANS AND ECCENTRICALLY MOUNTED THERETO; AND (L) OUTLET VALVE ACTUATING MEANS AFFIXED TO SAID SECOND COLLAR MEANS.