Automatic torque controller for an impact wrench

Details Automatic torque controller for an impact wrench Automatic torque controller for an impact wrench

1977-03-10

1977-12-27

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

81 5744, 173 15, B25B 1900

Patent

active

040647714

ABSTRACT:
An attachment for a pneumatic impact wrench is mounted between the wrench and socket tool which fastens a nut or bolt in an assembly. The attachment controls automatically the torque applied to the nut or bolt by providing a cylindrical housing with a sliding member. The sliding member is positioned within the cylindrical housing by an extension engaging a circular groove in the socket tool, the groove being of such a depth as to be proportional to the size of the nut or both being fastened. The sliding member controls the amount of compressed air supplied to the drive motor of the impact wrench by closing off or opening the inlet and outlet for the compressed air provided in the cylindrical housing.

REFERENCES:
patent: 1459402 (1923-06-01), Johnson
patent: 2261204 (1941-11-01), Amtsberg
patent: 3780603 (1973-12-01), Whitaker

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