Drain valve

Details Drain valve Drain valve

1995-08-11

1997-11-18

Lee, Kevin

Valves and valve actuation

With correlated flow path

Pipe side

251333, 251366, F16K 5100

Patent

active

056879512

ABSTRACT:
A new and improved drain valve for use with plastic fluid flow components, such as pipes, conduits, fittings, joints and the like is provided. The drain valves include a thermoplastic housing which is directly attached by welding or heat-fusion bonding to a plastic line component or is molded in during the molding step for making the line component. Valving members are assembled to the plastic housing to provide for selective drainage of the plastic line components as desired. The new and improved drain valves permit incorporation of drain valves into plastic conduits and fluid flow systems in a sealed and secure manner substantially in the absence of secondary sealing members.

REFERENCES:
patent: 2710594 (1955-06-01), Thompson
patent: 3634167 (1972-01-01), Plontke
patent: 3800825 (1974-04-01), Zoll
patent: 4784174 (1988-11-01), Ryan
patent: 5123627 (1992-06-01), Hodges
Abstract for DE 4138608.
Abstract for DE 8433993.
Abstract for DE 4128818.

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