Gate valve sealing structure
AssigneeAdaptor, Inc.
InventorMichael Gagas
Life of this patent
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Abstract
An improved liquid infiltration adapting structure for preventing liquid infiltration around a gate valve box. The structure has an annular tube structure that is tapered to more easily receive a mating pipe. The tube structure may also comprise at least one bead for further securing the mating pipe. The adapting structure is also improved by providing a stepped inner flange for ease of installing the structure around the gate valve box.
Claims17
In a liquid infiltration adapting structure for adapting a pipe member to a valve assembly to thereby prevent liquid infiltration around said valve assembly, the liquid adapting structure comprising a generally annular flexible tube structure having a top end and a bottom end and an inside surface and an outside surface, one of said inside and outside surfaces providing a mating surface for receiving said pipe member, the improvement being:
- said mating surface of said flexible tube structure tapering continuously and evenly in a constant direction from said bottom end towards said top end of said tube structure said tapering structure thereby forming a continuously curved structure to form a flared structure at said top end of said mating surface for receiving said pipe member, said bottom end of said mating surface providing a sealing arrangement for said pipe member.
Dependencies are inferred from the claim text.