Metal deforming – By relatively movable offset tool-faces – With tool motion in fixed path
Patent
1975-05-23
1977-02-01
Lanham, C.W.
Metal deforming
By relatively movable offset tool-faces
With tool motion in fixed path
7245319, 91411A, 91461, B21J 1534
Patent
active
040055981
ABSTRACT:
A blind riveter has a housing with a tubular body and a nosepiece containing a rivet-mandrel-gripping chuck extending transverse to this body. The body is provided with three in-line tubes constituting a liner separated by two partitions so as to form three compartments each provided with a respective longitudinally reciprocal piston. A stem interconnects the three pistons and is provided at the forward end with an end piece engaging a roller on the long arm of a bell-crank lever pivoted on the housing and having a short arm pivoted on a puller body carrying the rivet-gripping chuck. A collar on the rear end of the housing is provided with a control valve that pressurizes all three of the chambers in back of the pistons while pressurizing the extreme rear chamber and the other two chambers through a passage formed through the same interconnecting pistons, and can pressurize the chamber in front of the rear piston so as to retract all three pistons depending on the position of a trigger constituting a pilot valve controlling the position of a spool valve.
REFERENCES:
patent: 2053717 (1936-09-01), Huck
patent: 2396001 (1946-03-01), Fischer
patent: 3084672 (1963-04-01), Dalton
patent: 3402778 (1968-09-01), Carter
patent: 3430539 (1969-03-01), Freeman
patent: 3451248 (1969-06-01), Bell
patent: 3457763 (1969-07-01), Freeman
patent: 3485141 (1969-12-01), Ott
patent: 3554088 (1971-01-01), Bruyn
patent: 3630427 (1971-12-01), Stokes
patent: 3802519 (1974-04-01), Newton
Ehmann Hans
Klein Gunther
Crosby Gene P.
Dubno Herbert
Gesipa Blindniettechnik Gesellschaft mit Beschrankter Haftung
Lanham C.W.
Montague Ernest G.
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