Pipe joints or couplings – Elbow
Reexamination Certificate
2008-04-16
2010-12-28
Bochna, David E (Department: 3679)
Pipe joints or couplings
Elbow
Reexamination Certificate
active
07857357
ABSTRACT:
A reinforced pipe fitting has a body with a cylindrical first section and a cylindrical second section. The first section has a first longitudinal axis and the second section has a second longitudinal axis. The side walls of the first section intersect the side walls of the second section at a crotch point disposed within the plane defined by the first and second longitudinal axes. The first section defines a first section crotch area pipe stop having a proximal portion disposed proximate to the crotch point and a distal portion disposed opposite the proximal portion. The average thickness of the proximal portion disposed 15° to either side of the plane defined by the first and second longitudinal axes is greater by about 15% than the average thickness of the distal portion disposed 15° to either side of the plane defined by the first and second longitudinal axes.
REFERENCES:
patent: 1960557 (1934-05-01), Snyder
patent: 2303949 (1942-12-01), Nordell
patent: 2303950 (1942-12-01), Nordell
patent: 2506064 (1950-05-01), Llewellyn
patent: 3477749 (1969-11-01), Albro
patent: 4830410 (1989-05-01), Wermelinger
patent: 5316349 (1994-05-01), Rafeld
patent: 5984374 (1999-11-01), Esser
patent: 6086116 (2000-07-01), Smahl
“Designing, Operating and Maintaining Piping Systems Using PVC Fittings (A Handbook of Design Guidelines and Precautions),” by Ron D. Bliesner of Keller-Bliesner Engineering, Logan Utah, Published by the PVC Fittings Division of the Irrigation Association, dated Feb. 3, 1987.
Anderson Denton L.
Bochna David E
Sheldon Mak & Anderson PC
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