Tool driving or impacting – Impacting devices – With anvil arranged to transmit torsional impact to tool
Patent
1978-08-16
1980-01-22
Staab, Lawrence J.
Tool driving or impacting
Impacting devices
With anvil arranged to transmit torsional impact to tool
B25D 1500
Patent
active
041845528
ABSTRACT:
The manually actuated impact tool for rotatively driving a fastener has a spring in a handle for storage of energy, a rotatable tool head and an inertia member surrounding the tool head and connected to the handle via driving connections. A cam associated with the handle is provided to coact with the driving connections to disengage the driving connections when the tool head rotation is resisted by a predetermined force and the handle is rotated relative to the tool head and to allow re-engagement of the driving connections in another operative condition. A push rod is provided to coact with the handle and inertia member to actuate the spring for storage of energy upon resistance of the tool head to rotation and to rotate the inertia member under the force of the stored energy of the spring and effect conversion of the kinetic energy of the inertia member to impact force on the tool head upon re-engagement of the driving connections. The push rod is substantially straight and connected, at one end, to the inertia member at a point radially outwardly of the rotational axis and, at the other end, is connected to the spring via a ball and socket joint.
REFERENCES:
patent: 1923122 (1933-08-01), Smith
patent: 2655825 (1953-10-01), Gendron
patent: 2758569 (1956-08-01), Peterson
patent: 2954714 (1960-10-01), Swenson
patent: 3108506 (1963-10-01), Swenson
patent: 3184998 (1965-05-01), Young
patent: 3561543 (1971-02-01), Ulbing
Marquette Metal Products Company
Staab Lawrence J.
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