Tool driving or impacting – Impacting devices – With anvil arranged to transmit torsional impact to tool
Patent
1979-08-27
1982-02-02
Schroeder, Werner H.
Tool driving or impacting
Impacting devices
With anvil arranged to transmit torsional impact to tool
B25D 1502
Patent
active
043135056
ABSTRACT:
An improved rotary impact clutch or impact wrench of the type normally used for setting threaded fasteners by imparting rotary impacts. The combination includes a hammer member which is driven; an anvil to which the rotary impacts are delivered. Pins which may be referred to as dog pins or anvil pins are carried in axial recesses on the inside of the hammer member and are movable axially against the force of a spring to come into position to deliver impacts against lobes of the anvil member. Ball cam means are provided associated with a cam sleeve which has engagement with the dog pins for the imparting of the axial movement to them. The dog pins or anvil pins are generally cylindrical, having an intermediate part of smaller diameter. The improvements reside primarily in a further component preferably in the form of a ring, shaped to be positioned inside of the hammer and having diametrically opposed recesses to engage the end parts of the dog or anvil pins. The combination with this part achieves the purpose that the anvil pins are held accurately in position while moving angularly with the hammer member and axially relative to it into a position to impact the anvil.
REFERENCES:
patent: 2339530 (1944-01-01), Van Sittert et al.
patent: 2684738 (1954-07-01), Kaplan
patent: 2836272 (1958-05-01), Kaman
patent: 3174597 (1965-03-01), Schaedler et al.
patent: 3175660 (1965-03-01), Kaman
patent: 3414065 (1968-12-01), Falter
patent: 3908706 (1975-09-01), Hess
Falik Andrew M.
Rodac Pneumatic Tools
Schroeder Werner H.
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