Illumination – With implement or hand held holder therefor – Hand tool
Patent
1994-07-20
1995-05-02
Lazarus, Ira S.
Illumination
With implement or hand held holder therefor
Hand tool
81 5714, 81 63, 81 54, 173 93, 173176, B25B 1300
Patent
active
054125464
ABSTRACT:
A power wrench includes a housing inside which an electric motor is mounted. A torque/rotation transmission mechanism is also disposed inside the housing to be coupled to the motor to drive a driving tip thereof extending out of a front end of the housing for engagement with a bolt
ut to be loosened or tightened. The transmission mechanism includes a cylindrical main body with a cylindrical projection concentrically integral therewith to connected to the spindle of the motor so as to transmit rotation to the main body. A coupling member is pivotally mounted on the main body and controlled by a centrifugal clutch to intermittently hit an output shaft along a circumferential direction to apply a torque impulse to the output shaft for loosening or tightening the bolt or nut. A lamp is provided on the front end of the housing to project a light beam to the bolt or nut to allow the operator to monitor the operation of the power wrench in a dark environment.
REFERENCES:
patent: 2855679 (1951-10-01), Gibble
patent: 3734205 (1973-05-01), Maurer
patent: 4727780 (1988-03-01), Huang
patent: 4920831 (1990-05-01), Huang
patent: 4947939 (1990-08-01), Hung
patent: 5035161 (1991-07-01), Huang
patent: 5158354 (1992-10-01), Simmons
patent: 5267129 (1993-11-01), Anderson
Lazarus Ira S.
Sember Thomas M.
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