Torque control screwdriver

Details Torque control screwdriver Torque control screwdriver

1989-05-16

1990-08-28

Yost, Frank T.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

192 56R, 192150, B25B 2314

Patent

active

049517562

ABSTRACT:
A hand held pneumatic tool is provided for driving fasteners in which the cam shape and arrangement between the driving and driven cams provides a "dwell" time for preventing further impacts after the desired torque has been reached and a latch arrangement provided to prevent undesired shut-off in the reverse direction of operation. Means are provided to assure restart after shut-off, and a ball spline between the driven cam and spindle is used to increase accuracy.

REFERENCES:
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patent: 3082742 (1963-03-01), Vilmerding et al.
patent: 3174599 (1965-03-01), Spyridakis et al.
patent: 3205986 (1965-09-01), Kramer
patent: 3205992 (1965-09-01), Clapp
patent: 3263785 (1966-08-01), Krouse
patent: 3275116 (1966-09-01), Martin
patent: 3477521 (1969-11-01), Kiester
patent: 3608686 (1971-09-01), Martin Sr., et al.
patent: 3667345 (1972-06-01), Schaedler et al.
patent: 3766990 (1973-10-01), Eckman et al.
patent: 3850553 (1974-11-01), Wallace
patent: 4071092 (1978-01-01), Wallace

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