To provide a torque-angle wrench which is smaller and more accurate than a conventional tool using a spinning gyroscope and has a longer lifetime.
The torque-angle wrench (100) has a fixing tool, namely, a handle (104) for adding torque to a bolt with a fastening angle at certain rotary angular velocity. A piezoelectric gyroscope sensor device (102) including a circuit for vibrating an oscillation body is connected to the wrench. When the wrench is rotated with a fastening angle, the oscillation body changes its oscillation direction at the angular velocity. A new oscillation pattern is detected with a suitable detection circuit, and is converted into an electrical signal in proportion to strength at the rotary angular velocity of the wrench. The electrical signal provides a visual display indicating a fastening angle by being electronically processed with a suitable conversion and display circuit. The conversion and display circuit becomes a part of an adapter-combined type measuring instrument integrated with the wrench or connected with the sensor device without being integrated together.
CRASS MATTHEW M
PUTNEY GORDON A
NIESEN RANDY J
IWINSKI DEAN J
| JPH06210574A | 1994-08-02 | |||
| JPH06304879A | 1994-11-01 | |||
| JPS61181912A | 1986-08-14 | |||
| JPS4972798A | 1974-07-13 | |||
| JPS597568A | 1984-01-14 | |||
| JPS6176282A | 1986-04-18 |
Hajime Asamura
Hayashi Zouzo
Kuniaki Shimizu