Arrangement for elongating a stay bolt means or tension anchor independently of nut means associated therewith

Claim 1

A STAY BOLT STRUCTURE FOR INTERCONNECTING STRUCTURAL PARTS, SAID BOLT STRUCTURE COMPRISING AN ELONGATED BOLT MEMBER EXTENDING THROUGH SAID PARTS, ABUTMENT MEANS FIXED TO ONE END OF SAID BOLT MEMBER AND ENGAGING ONE OF SAID PARTS, A SECOND ABUTMENT MEANS THREADEDLY CONNECTED TO THE OPPOSITE END OF SAID BOLT MEMBER ENGAGING THE OTHER OF SAID PARTS, SAID THREADED CONNECTION PROVIDING FOR ADJUSTMENT OF SAID SECOND ABUTMENT MEANS TOWARD OR AWAY FROM SAID OTHER PART, AN ANNULAR RECESS SURROUNDING SAID BOLT MEMBER TO PROVIDE A HYDRAULIC CYLINDER IN ONE OF SAID ABUTMENT MEANS, A PISTON SLIDABLY RECEIVED IN SAID CYLINDER, SAID PISTON COMPRISING A SLEEVE SLIDABLY RECEIVED ON SAID BOLT MEMBER, SAID SLEEVE EXTENDING FROM WITHIN SAID CYLINDER INTO ENGAGEMENT WITH THE OTHER ABUTMENT MEANS AND MEANS TO APPLY FLUID PRESSURE TO SAID CYLINDER, WHEREBY UPON APPLICATION OF FLUID PRESSURE TO SAID CYLINDER SAID SLEEVE WILL MOVE AWAY FROM SAID ONE ABUTMENT MEANS TOWARD THE OTHER ABUTMENT MEANS TO FORCE SAID ABUTMENT MEANS APART AND STRETCH SAID BOLT MEMBER, THEREBY RELIEVING THE INTERCONNECTING FORCE ON SAID PARTS AND PERMITTING FREE ADJUSTMENT OF SAID SECOND ABUTMENT MEANS ON SAID BOLT MEMBER.