04492253 is referenced by 39 patents and cites 6 patents.

A tide gate check valve in which at least three converging sides are provided at a tapered region of a flexible sleeve, so that on reverse back pressure build-up of fluid, reverse fluid flow is prevented, while the valve sleeve does not invert or collapse. The present configuration features embedded reinforcing elements for resisting inversion or collapsing when the back pressure builds up. This feature is especially important for large-sized conduits of 36" or 72" diameter, or even larger, such as are common in storm sewer applications.

Title
Tide gate valve
Application Number
220962
Publication Number
4492253
Application Date
June 1, 1982
Publication Date
January 8, 1985
Inventor
Spiros G Raftis
Pittsburgh
PA, US
Agent
Kirschstein Kirschstein Ottinger & Israel
Assignee
Red Valve Company
PA, US
IPC
F16K 15/14
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