Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent
1974-06-25
1976-08-17
Purser, Ernest R.
Tool driving or impacting
Automatic control of power operated means
Tool advance causing or controlling means
64 28M, 81 524A, 192 84PM, F16D 2701, B25B 2102, B25B 23142
Patent
active
039748847
ABSTRACT:
A power wrench is shown which has a magnetic clutch that releases at a pre-determined torque. The clutch comprises a driving clutch member with a permanent-magnetic sleeve in which a permanent-magnetic sleeve of a driven clutch member is disposed. The permanent-magnetic sleeves are radially magnetized and magnetically inter-coupled through a radial clearance. The driving clutch member is coupled directly to the motor and the driven clutch member is coupled to an output shaft of the wrench through a gear-down mechanism.
REFERENCES:
patent: 2437871 (1948-03-01), Wood
patent: 2885873 (1959-05-01), Beeston, Jr.
patent: 2943216 (1960-06-01), Spodig
patent: 3128400 (1964-04-01), Hornschuch et al.
patent: 3150725 (1964-09-01), Hornschuch et al.
patent: 3221389 (1965-12-01), Cowell
patent: 3240304 (1966-03-01), Wickersham
patent: 3783716 (1974-01-01), Saito
patent: 3792737 (1974-02-01), Bratt
patent: 3837232 (1974-09-01), Fredell
Rockwell Publication, "Rockwell Direct Drive, Posi-Tension Heavy Duty Right Angle Nut Runners," 8/3/72.
Atlas Copco Aktiebolag
Braun Leslie A.
Purser Ernest R.
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