Jonathan T Ledbetter

US Patent:

6848465, Feb 1, 2005

Filed:

Apr 17, 2002

Appl. No.:

10/124206

Inventors:

Jonathan T. Ledbetter - Kernersville NC, US

Assignee:

Robert H. Wager Co., Inc. - Rural Hall NC

International Classification:

B65D 5116
F16K 2404
F16K 3122
F16K 3300

US Classification:

13731504, 553851, 55512, 55515, 96147, 137202, 137388, 137423, 137433, 137550, 210163, 210232, 210432

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.