Motion transmitting apparatus

Claim 1

A HYDRAULIC APPARATUS FOR TRANSFORMING RECIPROCATING MOTION INTO OSCILLATING ROTARY MOTION, COMPRISING A HOUSING MEMBER DEFINING AN ELONGATED CYLINDER CHAMBER HAVING TWO SEALED ENDS, AND A FLUID CONVEYING PORT ADJACENT TO EACH OF SAID ENDS AND COMMUNICATING WITH SAID CHAMBER; A DOUBLE ACTING PISTON MEMBER RECIPROCABLY RECEIVED IN SAID CHAMBER, SAID PISTON MEMBER SLIDABLY FITTED INTO SAID HOUSING MEMBER AND HAVING AN AXIAL LENGTH LESS THAN THE DISTANCE BETWEEN SAID PORTS; FLUID FLOW REGULTING REVERSING MEANS OPERATIVELY CONNECTED WITH AND ALTERNATELY ADMITTING A HYDRAULIC PRESSURE FLUID TO SAID PORTS SO THAT THE PISTON MEMBER IS CAUSED TO RECIPROCATE IN SAID CHAMBER; A TOOTHED RACK RIGID WITH AND EXTENDING IN THE AXIAL DIRECTION OF SAID PISTON MEMBER; A PINION ROTATABLY MOUNTED IN SAID HOUSING MEMBER AND HAVING TEETH MATING WITH THE TEETH OF SAID RACK SO AS TO ALTERNATELY ROTATE IN OPPOSITE DIRECTIONS WHEN SAID PISTON MEMBER RECIPROCATES IN SAID CHAMBER, SAID PISTON MEMBER HAVING A PERIPHERAL PORTION DISPOSED SUBSTANTIALLY DIAMETERICALLY OPPOSITE SAID PINION AND SAID HOUSING MEMBER HAVING AN INTERNAL WALL PORTION ADJACENT TO SAID PERIPHERAL PORTION, SAID PERIPHERAL PORTION TENDING TO BEAR AGAINST SAID WALL PORTION IN RESPONSE TO PRESSURE TRANS-