DRILL BIT AND METHOD AND APPARATUS FOR MAKING SAME
United States Patent 3495670
US Patent References:
Ball and socket joint and method of making same
- - 1798738
Rotary bit
- - 2121202
Drill bit
- - 2626128
Method of and apparatus for attaching clinch nuts to sheet metal members
- - 2652942
Bit
- - 2990025
Ball and socket joint and method of making same
- - 1798738
Rotary bit
- - 2121202
Drill bit
- - 2626128
Method of and apparatus for attaching clinch nuts to sheet metal members
- - 2652942
Bit
- - 2990025
Inventors:
Ditson J. D.
Publication Date:
02/17/1970
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Export Citation:
Assignee:
INGERSOLL RAND CO
Primary Class:
Other Classes:
76/5.100, 29/525, 29/520, 76/108.100
International Classes:
B21K5/06; B21K25/00; E21B10/56; B21K5/00; E21B10/46; E21C13/00