Title: Method of making a pipe fitting and product

Abstract: A method of making a pipe fitting havin three or more legs arranged in any desired shape by deforming a malleable metal tube substantially filled with a constant volume filler material in a single step without the need for secondary bending while maintaining the filler material at constant volume to provide a fitting wherein the variation in wall thickness is less than about 10%.

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Inventors: Holmgren, Marvin E. (Elkhart, IN, US)

Application Number: 741968
Filing Date: 1976-11-15
Publication_date: 1977-09-13
Assignee: Elkhart Products Corporation (Elkhart, IN)
Primary Class(es): 72/58 29/890.14
Other Classes:
US Patent Ref:

1947611	Feb, 1934	Miothe	72/58.
2858787	Nov, 1958	Hill	72/58.
3220098	Nov, 1968	Arbogast	29/157.
3225423	Dec, 1965	Huet	29/157.
3681960	Aug, 1972	Tadolioro	29/157.
3961513	Jun, 1976	Stahly	29/157.

Other Refs:
Primary Examiner: Gilden, Leon
Assistant Examiner:
Attorney: Tilton, Fallon, Lungmus, Chestnut & Hill