Toll for the application of predetermined torque to bolts, nuts

Details Toll for the application of predetermined torque to bolts, nuts Toll for the application of predetermined torque to bolts, nuts

1991-02-06

1993-01-05

Kisliuk, Bruce M.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

81467, 811801, B25B 23153

Patent

active

051760509

ABSTRACT:
A tool for the application of selected torque to the polygonal head of a bolt, to a nut or to an analogous component has a first portion which is a snug fit on the polygonal part of the component, and a polygonal second portion which can be engaged and rotated by a wrench. The material of the tool is more readily deformable than the material of the component and the material of the wrench so that the wrench deforms the second portion and/or the component deforms the first portion of the tool when the component offers a selected resistance to further rotation, i.e., in response to the application of a selected torque to the component. The first portion can be bonded or molded to the torque-receiving part of the component to be rotated, and the second portion can be coated with a film of a color different from that of the second portion to facilitate visual determination of the condition of the second portion. The tool can be provided with a third portion which can be used for the application of a different torque, or the second portion can be deformed in two or more stages to permit the application of torque in several stages or to permit the application of one of two or more different torques.

REFERENCES:
patent: 2260055 (1941-10-01), Reardon
patent: 3331267 (1967-07-01), Tietge

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