Title:
METHOD OF REFORMING TUBULAR METAL BLANKS INTO INNER-FIN TUBES
United States Patent 3422518


Inventors:
French, Fred W.
Application Number:
US3422518DA
Publication Date:
01/21/1969
Filing Date:
10/20/1967
Assignee:
Valley, Metallurg Processing
Primary Class:
Other Classes:
29/890.049, 72/96, 72/119, 72/208, 72/209, 72/283, 72/370.17, 165/177
International Classes:
B21C37/20; (IPC1-7): B21D53/06; B21C1/24; B23P15/26
View Patent Images:
US Patent References:
3289451Method and apparatus for forming internal helical ribbing in a tube1966-12-06
3118328N/A1964-01-21
3017793Forming tools, machines and methods1962-01-23
2944448Cam operated forging machine1960-07-12
0654590N/A1900-07-31
Foreign References:
GB188705436A
FR1073209A1954-09-21