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Class Information
Number: 29/890.149
Name: Metal working > Method of mechanical manufacture > Gas and water specific plumbing component making > Elbow or l-shaped fitting making
Description: Process wherein the manufactured article is an accessory part or component especially adapted for use in a fluid system, which part or component has a form or configuration similar to the bent joint in the human arm or to the 12th letter of the English alphabet.

Patents under this class:

Patent Number Title Of Patent Date Issued
8387435 Elbow material production device and production method thereof Mar. 5, 2013
7908731 Folded-seam connection, method of producing it and device Mar. 22, 2011
7415765 Flange coupling and manufacturing method for the same Aug. 26, 2008
7328510 Elbow rotator Feb. 12, 2008
7254980 Gas supply tube and method of making same Aug. 14, 2007
7096585 Apparatus and method for automated production of adjustable duct member Aug. 29, 2006
6832623 Gas meter valve and method Dec. 21, 2004
6643930 Method and apparatus for producing end flange member for cylindrical duct Nov. 11, 2003
6591650 High-pressure bulge-forming apparatus Jul. 15, 2003
6382679 Meter loop frame assembly May. 7, 2002
5979202 Method and apparatus for making pipe line steel grooved-end fittings Nov. 9, 1999
5775736 Plastic pipe fittings Jul. 7, 1998
5765285 Method of bending a rigid thermoplastic pipe Jun. 16, 1998
5625948 Method for producing a pipe and apparatus for the same May. 6, 1997
5615481 Method and apparatus for the production of circumferentially compressible pipe fittings Apr. 1, 1997
5473815 Method for producing a connector for fluid pipe elements Dec. 12, 1995
5257825 Barb and swivel spout elbow fittings Nov. 2, 1993
5189790 Method of fabricating a double walled pipe elbow Mar. 2, 1993
5051076 Two-cylinder-type rotary compressor system having improved suction pipe coupling structure Sep. 24, 1991
5014424 Method of making a curved pipe May. 14, 1991
4998337 Method for the permanent mutual connection of already finished metal tubes Mar. 12, 1991
4991293 Means for providing very small bend radii in the tube-like structures Feb. 12, 1991
4694547 One-piece metal covering for insulated pipe bends Sep. 22, 1987
4489585 Production of tubular members Dec. 25, 1984
4400863 Method of making a rigid fiberglass duct having an integral bendable elbow Aug. 30, 1983
4346740 Pipe elbow insulator and protective jacket therefor Aug. 31, 1982
4106797 Reinforced fitting construction Aug. 15, 1978
4106322 Press for pressing pipe fittings Aug. 15, 1978
3979809 Pipe elbow and method of making same Sep. 14, 1976
3977706 Pipe elbow Aug. 31, 1976

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