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Title: Tool for forming internal threads

Abstract: The invention provides a tool for forming threads or grooves on the internal surface of a pipe.


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Inventors: Wadsworth, Jr., Gilbert A. (Cockeysville, MD, US)

Application Number: 547487
Filing Date: 1975-02-06
Publication_date: 1976-02-17
Assignee: Dynatherm Corporation (Cockeysville, MD)
Primary Class(es): 72/104 72/120
Other Classes:
US Patent Ref:
1717720Jun, 1929Martin et al.72/122.
1798742Mar, 1931Kellogg72/122.
3587272Jun, 1971Zmuda72/122.
3681802Aug, 1972Youtz et al.72/104.

Other Refs:
Primary Examiner: Larson, Lowell A.
Assistant Examiner:
Attorney: Caser; A. H.