Adjustable inline relief valve

Claim 1

AN ADJUSTABLE INLINE VALVE HAVING COAXIAL INLET AND OUTLET MEMBERS ADAPTED TO BE INSERTED INTO THE MAIN FLOW LINE OF A FLUID SYSTEM, SAID MEMBERS DEFINING A VALVE MEMBER HAVING FIXEDLY SPACED INLET AND OUTLET PORTS, SEALING MEANS SURROUNDING ONE OF SAID PORTS, RETAINING MEANS CARRIED BY SAID INLET AND OUTLET MEMBERS AND SECURING SAID SEALING MEANS, VALVE MEANS SLIDABLE IN SAID VALVE CHAMBER, SAID VALVE CHAMBER AND SAID VALVE MEANS BEING DISPOSED IN THE MAIN FLOW LINE, SAID VALVE MEANS INCLUDING A FIRST PORTION ADAPTED TO CO-OPERATE WITH SAID SEALING MEANS TO THEREBY CLOSE SAID INLET PORT AND A SECOND PORTION ADAPTED TO ABUT SAID RETAINING MEANS, ABUTMENT MEANS DISPOSED IN SAID VALVE CHAMBER BETWEEN SAID INLET AND OUTLET PORTS, SPRING MEANS INTERPOSED BETWEEN SAID VALVE MEANS AND SAID ABUTMENT MEANS, WHEREBY SAID VALVE MEANS IS BIASED TOWARD SAID INLET PORT, SLEEVE MEANS, MEANS TELESCOPICALLY AND ROTATABLY MOUNTING SAID SLEEVE MEANS ON SAID INLET AND OUTLET MEMBERS, AND MEANS EXTENDING THROUGH OPENING IN THE WALLS OF SAID MEMBERS AND INTERCONNECTIONG SAID SLEEVE MEANS AND SAID ABUTMENT MEANS, WHEREBY UPON ROTATION OF SAID SLEEVE MEANS, SAID ABUTMENT MEANS IS DISPLACED LONGITUDINALLY IN SAID VALVE CHAMBER TO THEREBY VARY THE BIAS OF SAID SPRING ON SAID VALVE MEANS, AND SEALS CARRIED BY SAID ABUTMENT MEANS, SAID SEALS BEING SPACED APART AND COOPERATING WITH THE WALLS OF SAID CHAMBER TO ISOLATE SAID VALVE CHAMBER FROM SAID OPENINGS.