Fluid handling – With repair – tapping – assembly – or disassembly means – Pressure regulating type valve
Reexamination Certificate
2005-02-01
2005-02-01
Walton, George L. (Department: 3753)
Fluid handling
With repair, tapping, assembly, or disassembly means
Pressure regulating type valve
C055S385100, C055S512000, C055S515000, C096S147000, C137S202000, C137S388000, C137S423000, C137S433000, C137S550000, C210S163000, C210S232000, C210S432000
Reexamination Certificate
active
06848465
ABSTRACT:
A dual-action vent check valve is disclosed. The valve includes a first check valve which is responsive to elevated fluids inside the valve. A second check valve is responsive to elevated fluids external to the valve. The first check valve prevents overflow from a vented structure, such as a sewer out-fall line, from passing through and out of the valve, thereby preventing spills. The second check valve operates to prevent floodwater from passing into an underground structure, such as a sewer, through the vent. One embodiment of the invention includes a basket for enclosing a deodorizing material inside the valve for deodorizing gases which pass through the valve.
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Wager Company, 1500 Series Marine Vertical Vent Check Valve, www.wagerusa.com/pages/marine/1500vertical.html, 1995 (last visited Jul. 17, 2002).
Robert H. Wager Co., Inc.
Walton George L.
Womble Carlyle Sandridge & Rice PLLC
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