One-armed torque wrench

Details One-armed torque wrench One-armed torque wrench

1985-04-25

1986-07-29

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

B25B 2314

Patent

active

046025383

ABSTRACT:
A torque wrench having a shaft with a tool head at one end a handle at the other end. The handle is supported on a lever system having a first and a second two-armed lever. One arm of the first lever engages one arm of the second lever. The handle is supported at two points on the other arm of the first lever and the other arm of the second lever. The other arm of the first lever engages a force sensor, which is attached to the shaft. The levers are dimensioned such that the measuring force acting upon the force sensor, when an applied force acts on the handle, is independent of the point of application of the applied force and is always proportional to the torque exerted about the axis of rotation of a tool.

REFERENCES:
patent: 2900855 (1959-08-01), Van Hoose
patent: 2924134 (1960-02-01), Harmes
patent: 3763724 (1973-10-01), Green
patent: 3869941 (1975-03-01), Tsuji
Catalog D89 of Eduard Wille GmbH & Co., pp. 100-101.

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