Adjustable extension torque bar

Details Adjustable extension torque bar Adjustable extension torque bar

1986-04-07

1988-07-05

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

8117785, B25B 1300

Patent

active

047546700

ABSTRACT:
An adjustable extension torque bar is provided which may be used to connect a driver member such as a wrench to a driven member such as a socket which engages a nut or bolt. The torque bar has an elongated member which slidably engages a noncircular aperture passing longitudinally along the length of an elongated sleeve. The aperture is noncircular in order to prevent the elongated member from rotating in the sleeve when torque is applied by a wrench which engages one end of the sleeve. The other end of the sleeve engages the elongated member which, in turn, engages the socket. An adjusting screw at one end of the elongated member may be tightened to cause a resilient spacer or a wedge-type member to expand against the inside surfaces of the noncircular aperture and prevent the elongated member from sliding inside the sleeve until sufficient force is applied to overcome frictional forces by pulling or pushing the elongated member with respect to the sleeve. The overall length of the torque bar may be established by first tightening the adjusting screw and then pulling or pushing the elongated member until the desired overall length is obtained. As such, the distance between the wrench and socket may be varied as necessary. An adjusting tool such as an Allen wrench may be used to tighten or loosen the adjusting screw.

REFERENCES:
patent: 406666 (1889-07-01), Pratt et al.
patent: 2438633 (1948-03-01), Condor
patent: 2627330 (1953-02-01), Gantz
patent: 2964981 (1960-12-01), Blunt
patent: 3887156 (1975-06-01), Hugonnier
patent: 4317393 (1982-03-01), Graffain
patent: 4367663 (1983-01-01), Merics
patent: 4376397 (1983-03-01), Newby et al.

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