Elbow pipe fitting
United States Patent D291481

Vassallo, Efrain D. (Ponce, PR)
Valls, Jose E. (Ponce, PR)
Application Number:
Publication Date:
Filing Date:
Vassallo Research and Development Corporation (Ponce, PR)
Primary Class:
Field of Search:
D23/40-47, 285/150, 285/156, 285/177, 285/179, 285/231, 285/345, 285/369, 285/383, 285/423
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US Patent References:
4637618Composite gasket and fitting including sameJanuary, 1987Valls277/152
4371179T-Shaped sealing ring with elongated lipFebruary, 1983Bohman285/231
4368894Reinforced sealing rings for pipe jointsJanuary, 1983Parmann285/231
4343480Pipe bell and gasketAugust, 1982Vassallo277/207A
4223896Sealing ringSeptember, 1980Strom285/231
4130302Twin positive and negative seal pipe fittingsDecember, 1978Mitchell et al.285/156
3791679PIPE FITTINGSFebruary, 1974Glover285/156
3592491PIPE COUPLINGSJuly, 1971Glover285/345
3582113PIPE JOINTJune, 1971Cauthery285/345
3064983Pipe jointNovember, 1962Halterman285/345
D137384N/AFebruary, 1944CorleyD23/45
D135633N/AMay, 1943Stark et al.D23/45
D135634N/AMay, 1943Stark et al.D23/45
2121558Method of installing a tubular systemJune, 1938Coe et al.D23/43
0865497N/ASeptember, 1907Kenyon285/345

Primary Examiner:
Largen, James R.
Attorney, Agent or Firm:
Steele, Gould & Fried
1. The ornamental design for an elbow pipe fitting, as shown and described.


FIG. 1 is a perspective view of an elbow pipe fitting showing our new design:

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a left side elevational view thereof.