Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1975-07-31
1976-08-03
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72108, 72121, 10 89H, B21H 304
Patent
active
039722139
ABSTRACT:
A thread-rolling head comprises three crank-like support pieces, each bearing a thread roller, protruding from a support member in which they are mounted. A control member is held unrotatably on the support member while a bearing member held in front of the support member is rotatable and stop means are operative between the bearing and the support member to transmit to the latter a torque received from the workpiece through the thread rollers; the stop means is rendered inoperative when the bearing means is caused by the workpiece to move forwardly, whereby the torque will aid a spring in rotating the bearing member to pivot the support pieces in order to remove the thread rollers from the workpiece.
REFERENCES:
patent: 2376727 (1945-05-01), Schutte
patent: 3352139 (1967-11-01), Cummings
patent: 3452567 (1969-07-01), Marcovitch
patent: 3681802 (1972-08-01), Youtz et al.
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