Ratchet wrench

Details Ratchet wrench Ratchet wrench

1990-09-04

1991-10-08

Smith, James G.

Tools

Including tool driving by impact delivering component or...

Motor or gear driven

173 935, B25B 1900

Patent

active

RE0337110

ABSTRACT:
The powered ratchet wrench 10 is constructed of several components. A throttle lever 20 controls the air flow to a rotary air motor 30. The rotary output of the motor is transmitted to the hammer assembly 40 of an impact clutch mechanism. A spring 50 biases an anvil shaft 60 into association with the hammer assembly 40. The anvil can be directly driven by the motor through the hammer assembly or can be driven intermittently by a series of rotational impacts from the hammer assembly. The rotation of the anvil shaft causes the reversible ratchet mechanism 70 to rotate in the desired direction, thus tightening or removing a threaded fastener. Only a small reaction force is transmitted by the tool to the operator once the fastener is tightened.

REFERENCES:
patent: 3212590 (1965-10-01), Hoza et al.
patent: 3414066 (1968-12-01), Wallace
patent: 3428137 (1969-02-01), Schoedler et al.
patent: 4063601 (1977-12-01), Biek
patent: 4184552 (1980-01-01), Anderson
patent: 4346630 (1982-08-01), Hanson
patent: 4382476 (1983-05-01), Swenson

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