Fluid power cylinder

Claim 1

A FLUID POWER CYLINDER COMPRISING A HOLLOW CYLINDER HAVING OPPOSITE ENDS, A PISTON RECIPROCALLY RECEIVED BY SAID CYLINDER, TWO HEAD BLOCKS MOUNTED ON AND CLOSING THE OPPOSITE ENDS RESPECTIVELY OF SAID CYLINDER, A PISTION ROD DISPOSED COAXIALLY OF SAID HOLLOW CYLINDER SECURED AT ONE END TO SAID PISTON AND RECIPROCALLY PROJECTING THROUGH ONE OF SAID HEAD BLOCKS, SAID HEAD BLOCKS EACH HAVING TWO PARALLEL SURFACES WHICH ARE SPACED APART IN A DIRECTION AXIALLY OF SAID CYLINDER THEREBY PROVIDING THICKNESS DIMENSIONS FOR SAID BLOCKS, SAID BLOCKS HAVING ORTHOGONALLY INTERSECTING SIDES, PISTON ROD-BEARING MEANS WHICH INCLUDES AN AXIALLY EXTENDING BEARING APERTURE THROUGH SAID ONE BLOCK, SAID BEARING APERTURE COAXIALLY SLIDABLY RECEIVING SAID PISTON ROD, SAID BEARING APERTURE EXTENDING BETWEEN THE SURFACES OF SAID ONE BLOCK AND BEING OF UNIFORM DIAMETER THROUGHOUT THE LENGTH THEREOF, THE DIAMETER OF SAID APERTURE BEING SUBSTANTIALLY COEXTENSIVE WITH THE DIAMETER OF SAID ROD, EACH SAID BLOCK HAVING FIRST AND SECOND IDENTICALLY SHAPED BORES EXTENDING INWARDLY FROM TWO OPPOSITE SIDES RESPECTIVELY, A THIRD BORE IN EACH BLOCK HAVING INNER AND OUTER OPPOSITE ENDS, THE OUTER END OF SAID THIRD BORE OPENING THROUGH A THIRD SIDE OF THE BLOCK AND THE INNER END BEING CLOSED WITHIN SAID BLOCK THEREBY PROVIDING A BLIND PORT, SAID BLIND PORT AT ITS INNER END COMMUNICATING WITH THE INNERMOST ENDS OF SAID FIRST AND SECOND BORES, EACH SAID FIRST AND SECOND BORES BEING DIVIDED INTO TWO DIFFERENT DIAMETER LENGTHS WITH THE INNERMOST LENGTH BEING THE SMALLER, EACH SAID FIRST AND SECOND BORES HAVING A VALVE SEAT PROVIDED AT THE JOINDER OF THE TWO DIFFERFENT DIAMETER LENGTHS, THE OUTERMOST ENDS OF THE LARGER DIAMETER LENGTHS BEING THREADED, ONE OF SAID FIRST AND SECOND BORES RECEIVING A BALL VALVE ENGAGEABLE WITH THE RESPECTIVE VALVE SEAT, A CLOSURE NUT THREADED INTO THE OUTER END OF SAID FIRST BORE, A SPRING INTERPOSED BETWEEN SAID BALL VALVE AND SAID NUT FOR URGING SAID BALL VALVE INTO SEALING ENGAGEMENT WITH ITS VALVE SEAT, A RETAINING NUT THREADED INTO THE OUTER END OF THE OTHER OF SAID FIRST AND SECOND BORES,