Fluid motor with removable-locking end closure unit

Claim 1

A PRESSURE RETAINING CYLINDER WITH A REMOVABLE AND LOCKING END CLOSURE UNIT, WHICH COMPRISES IN COMBINATION, A CYLINDER BODY SECTION HAVING A FLARED AND ENLARGED DIAMETER END PORTION, THE LATTER HAVING AN OUTWARDLY PROJECTING WALL SECTION WITH AN ENLARGED DIAMETER AND TRUED END FACE THAT IS PERPENDICULAR WITH RESPECT TO THE AXIS OF SAID BODY SECTION, A REMOVABLE END CLOSURE MEMBER HAVING AN EXTERIOR PORTION AND AN INTERIOR PORTION WITH THE LATTER SIZED TO SLIP FIT INTO THE CYLINDER BODY SECTION AT SAID FLARED END PORTION SAID END CLOSURE MEMBER FURTHER HAVING A CIRCUMFERENTIAL TRUED SEATING FACE THAT IS SIZED TO ABUTT SAID TRUED END FACE OF THE ENLARGED DIAMETER WALL SECTION, AND A TRANSITION SECTION BETWEEN SAID EXTERIOR AND INTERIOR PORTIONS THEREOF, THE SEATING FACE OF SAID END CLOSURE POSITIONED WITH RESPECT TO SAID TRANSITION SECTION SO AS TO PROVIDE A SPACE AT LEAST A SHORT DISTANCE FROM THE INNER FACE OF SAID OUTWARDLY PROJECTING WALL SECTION, AN EXTERIOR COUPLING MEMBER FOR SAID END CLOSURE UNIT SIZED TO SLIDABLY FIT OVER SAID CYLINDER BODY SECTION AND IN ADDITION HAVING INTERNALLY POSITIONED CIRCUMFERENTIAL RIDGE MEANS, WITH SAID RIDGE MEANS SIZED TO PROVIDE A NARROW CIRCUMFERENTIAL LINE CONTACT WITH THE EXTERIOR SURFACE OF SAID PROJECTING WALL SECTION AT A POINT WHICH OPPOSES THE SPACE BETWEEN THE LATTER AND SAID TRANSITION SECTION TO PROVIDE A SPRING-LIKE ACTION IN THE COUPLING, AND ADJUSTABLE CONNECTING MEANS BETWEEN SAID COUPLING MEMBER AND SAID EXTERIOR PORTION OF SAID END CLOSURE.