Automatic torque release wrench of the preset type

Abstract

Abstract THE STRUCTURE EMBODIES AN ELONGATED TUBULAR HANDLE MEMBER WITH A WORK ENGAGING MEMBER PROJECTING THEREFROM AT ONE END TO PROVIDE A TRANSVERSE SHANK TO WHICH DETACHABLE SOCKETS OF VARIOUS STANDARD SIZES ARE APPLIED TO TURN FASTENERS TO A PREDETERMINED TORQUE LOAD. CONFRONTING PRIMARY AND SECONDARY FLEX BEAMS ARE DISPOSED IN THE TUBULAR HANDLE MEMBER FOR ENGAGEMENT WITH EACH OTHER AND THE WORK ENGAGING MEMBER. A SPRING URGED TRIGGER RELEASE IS MOVABLY MOUNTED TO THE PRIMARY FLEX BEAM IN THE REGION OF ITS MAXIMUM FLEX RESPONSIVE TO RESISTING THE TORQUE LOAD, AND THIS TRIGGER RELEASE IN THE PATH OF THE SECONDARY BEAM END TO NORMALLY ENGAGE THEREWITH UNTIL THE TRIGGER MOVES WITH THE FLEX OF BOTH BEAMS TO ENGAGE THE INTERNAL WALL OF THE TUBULAR HANDLE MEMBER, THEREBY RELEASING ITS CONNECTION THEREWITH WHEN THE LOAD IN THE PRIMARY BEAM EQUALS THE COMBINED BENDING LOAD ORIGINALLY SUSTAINED BY BOTH PRIMARY AND SECONDARY BEAMS. WHEN THIS OCCURS, THE PRIMARY BEAM WITH ITS RETAINED ELASTICITY RESERVE, DOES NOT PRESENT A COMPLETELY SOLID REACTION SHOULD THERE BE INADVERTENT OVER TORQUEING APPLIED TO THE FASTENER OR WORK ENGAGING MEMBER AFTER THE TRIGGER RELEASES. THE MANUAL RELEASE OF THE HANDLE MEMBER AFTER THE PRESET LOAD HAS BEEN APPLIED, PERMITS THE SPRING TO URGE THE TRIGGER TO AGAIN CONNECT WITH THE SECONDARY BEAM FOR AUTOMATIC RESETTING WITH THE BEAMS RETURNING TO THEIR ORIGINAL STRAIGHT LINE POSITION RELATIVE TO EACH OTHER AND THE HANDLE MEMBER. A CALIBRATED WALL SLIDING WEDGE PROVIDED ON THE HANDLE MEMBER IN THE PATH OF THE TRIGGER RELEASE MEMBER AFFORDS AVARIABLE ADJUSTMENT IN THE PRESET MECHANISM WITHIN A WIDE CAPACITY RANGE. AN ADJUSTMENT SCREW AT THE FREE END OF THE PRIMARY BEAM FOR ENGAGEMENT WITH THE HANDLE WALL AND ACCESSIBLE THROUGH AN APERTURE THEREIN, PROVIDES FOR ACCURATE SETTING THEREOF BY THE USER OVER AN EXTENDED PERIOD OF OPERATION.

Inventors

• 👤 Talmage O Green

Bibliographic Details