Inventors:
Richard L. Markus - Bridgeport CT
William P. Hidden - Wenham MA
Daniel F. Hefler - Concord MA
Assignee:
The Milford Rivet & Machine Company - Milford CT
International Classification:
B21J 1520
Abstract:
A hydraulically actuated power cylinder reciprocates a driver to exert a compressive force to upset a rivet with the power cylinder's movement being made to correspond to the movement of a pump cylinder by a fluid connection therebetween. The pump cylinder's movements are mechanically actuated according to a programmed cam and actuation is made to occur only during the riveting cycle by a control circuit operating a clutch and brake with the circuit inhibiting operation upon the sensing of a malfunction.