Tool driving or impacting – Impacting devices – With anvil arranged to transmit torsional impact to tool
Patent
1978-01-06
1980-03-04
Staab, Lawrence J.
Tool driving or impacting
Impacting devices
With anvil arranged to transmit torsional impact to tool
64 29, B25D 1500
Patent
active
041912640
ABSTRACT:
An impact wrench for tightening threaded joints by imparting a number of rotary blows to the threaded joint. The impact wrench comprises a housing which accommodates an impact clutch comprising an anvil and a hammer which consists of a driving member and a drive member, and a rotary drive of the hammer comprising an electric motor and a reduction gearing which has its output shaft mounted coaxially with the driving member of the hammer and is connected thereto for combined rotation only. The output shaft is connected to the driving member of the hammer by means of a spring-loaded pressure member accommodated in an axial bore of the output shaft and bodies of revolution contained in radial bores of the output shaft and engaging the spring-loaded pressure member. An annular groove is formed in the inner surface of the driving member of the hammer eccentrically relative thereto, and the bodies of revolution are received in the annular groove under the action of the spring-loaded pressure member.
REFERENCES:
patent: 2146153 (1939-02-01), Mathewson
patent: 3252300 (1966-05-01), Hofmann
patent: 3952814 (1976-04-01), Gelfand et al.
patent: 4108252 (1978-08-01), Stroezel
Antipov Georgy A.
Gelfand Mikhail L.
Lavnikov Nikolai S.
Teres Leonid N.
Tsipenjuk Yakov I.
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