Threaded – headed fastener – or washer making: process and apparat – Implement – e.g. – die – etc. – Screw threading die
Patent
1997-05-12
1998-08-25
Larson, Lowell A.
Threaded, headed fastener, or washer making: process and apparat
Implement, e.g., die, etc.
Screw threading die
470190, 470 80, B21J 1302
Patent
active
057978026
ABSTRACT:
A fast-acting die head that is particularly well-suited for use with small-size workpieces employs a set of chasers, each formed as a single piece and having a nose portion that provides two force-receiving surface elements. One of the surface elements is disposed to coact with a camming ring, which is moved axially thereover to close the chasers radially upon the workpiece; the other, underlying surface element receives the force of a spring-loaded plunger, which acts to thrust the associated chaser to an open position when the closing force of the camming ring is removed.
REFERENCES:
patent: 1639719 (1927-08-01), Breitenstein
patent: 2195837 (1940-04-01), Breitenstein
patent: 2387291 (1945-10-01), Powell et al.
patent: 2556742 (1951-06-01), Strickland
patent: 3864774 (1975-02-01), Fohl
patent: 5199928 (1993-04-01), Gress et al.
Nowak Florian I.
Nowak Gary F.
Nowak Glen L.
Dorman Ira S.
Larson Lowell A.
Nowak Products, Inc.
Tolan Ed
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