Pipe upsetting
United States Patent 2932889
US Patent References:
/1295430.html
- - 1295430

/1325073.html
- - 1325073

/1566645.html
- - 1566645

Forging means
- - 2027406

Method of forging
- - 2053975


Inventors:
Kritscher, Andrew F.
Publication Date:
04/19/1960
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Assignee:
UNITED STATES STEEL CORP
Primary Class:
72/342.940
Other Classes:
72/343, 72/359, 72/392
International Classes:
B21J5/08; B21K21/12; B21J5/06; B21K21/00
US Patent References:
2146461Method of riveting
2548702Pipe upsetting and hot broaching tool
2728135Method for use in connection with the making of protector caps for compressed gas cylinders