Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent
1975-02-19
1978-08-22
Purser, Ernest R.
Tool driving or impacting
Automatic control of power operated means
Tool advance causing or controlling means
64 29, B25B 2100
Patent
active
041082524
ABSTRACT:
A drive is mounted in a housing and an output shaft is coupled with the drive to be rotated by the same and is connectable with a fastener to be driven. An arrangement is provided for deactivating the drive when the torque acting on the output shaft exceeds a predetermined selectable level. This arrangement includes a plurality of surface portions which surround the axis of rotation of the shaft and which each of which is continuously inclined radially and circumferentially of the shaft. A plurality of transmitting members is mounted for torque-dependent shifting in direction radially of the axis, and biasing springs urge the members radially outwardly against respective ones of the surface portions.
REFERENCES:
patent: 2342540 (1944-02-01), Hale
patent: 3477521 (1969-11-01), Kiester et al.
patent: 3693381 (1972-09-01), McGee
Pate III William F.
Purser Ernest R.
Robert & Bosch GmbH
Striker Michael J.
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