Power-driven screwing tool

Details Power-driven screwing tool Power-driven screwing tool

1990-02-09

1991-10-29

Yost, Frank T.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

173 13, 81473, B25B 23157

Patent

active

050607332

ABSTRACT:
A power-driven screwing tool comprising an electric drive motor, an adjustable depth stop, a drive shaft receiving the screwing tool and adapted for being displaced relative to the depth stop. Between the drive motor and the drive shaft, a first clutch (jaw clutch) transmits the driving torque by form-locking engagement, while a second clutch responds to the predetermined screwing depth and acts to release the form-locking engagement of the first clutch by comprising a transverse pin being engaged or disengaged by a guide pocket whose bottom surface extends at a certain inclination relative to the longitudinal axis of the drive shaft.

REFERENCES:
patent: 4243129 (1981-01-01), Schoeps
patent: 4278427 (1981-07-01), Lingenhole et al.
patent: 4546833 (1985-10-01), Berecz et al.
patent: 4655103 (1987-04-01), Schreiber et al.

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