Surgical torque wrench with a torque indicator

Details Surgical torque wrench with a torque indicator Surgical torque wrench with a torque indicator

1995-09-13

1998-03-31

Dougherty, Elizabeth L.

Measuring and testing

Dynamometers

Responsive to torque

7386221, 73 112, 81467, G01L 524

Patent

active

057341133

ABSTRACT:
The torque wrench (1) comprises a torque instrument (10) which is known per se--in the present case a ratchet instrument--as well as a torque indicator (40) which can be attached thereto. The torque indicator (40) possesses a sleeve-shaped support (41) which can be pushed onto the handle (12) of the torque instrument (10) and on which a linearly elastic bending rod (51) is fastened. Upon operation, the force (F) is exerted upon the free end of the bending rod (51) and the torque generated is displayed on a graduation (48). At its very front the support (41) possesses a non-rotationally symmetrical insertion zone (42) which receives the transition region (121) of the handle (12) in a manner fixed against rotation. The principal advantages of the torque wrench (1) are its dismantlability and the combination possibilities. The display accuracy of the torque indicator (40) is checked using a special test device.

REFERENCES:
patent: 2242613 (1941-05-01), Mandl
patent: 2888825 (1959-06-01), Krafft
patent: 2934946 (1960-05-01), Engquist
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patent: 3274827 (1966-09-01), Sturtevant
patent: 3386284 (1968-06-01), Hejzlar
patent: 3391573 (1968-07-01), Hiller
patent: 3587307 (1971-06-01), Newberg
patent: 3664186 (1972-05-01), Kraus
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patent: 4226127 (1980-10-01), Hardiman
patent: 4244434 (1981-01-01), Wilson
patent: 4488442 (1984-12-01), Pacinelli
patent: 4805464 (1989-02-01), Grabovac
patent: 4977775 (1990-12-01), Grabovac et al.
patent: 5345845 (1994-09-01), Myers

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