Bypass valve

Details Bypass valve Bypass valve

1998-04-29

1999-08-03

Fox, John

Fluid handling

Systems

Multi-way valve unit

13762547, F16K 1108

Patent

active

059311967

ABSTRACT:
A bypass valve provides an elongated valve body defining a bore and a longitudinal axis. A first pair of axially spaced ports are attached to the valve body and include a service inlet port and a service outlet port. In addition, a second pair of axially spaced ports are attached to the valve body and include a valve inlet port and a valve outlet port. The bypass valve also has an elongated spool with an axis of rotation coinciding with the longitudinal axis while positioned to rotate in the bore between a service position and a bypass position. As part of the spool, a first curved land defines an outlet passage from the valve inlet port to the service outlet port, and a second curved land axially spaced from the first curved land defines an inlet passage from the service inlet port to the valve outlet port. The curved lands define the inlet and outlet passages so that fluid passing through the valve passes directly through a generally central area of the bore without diversion or obstruction by a central axial shaft. A bypass passage is located on the spool opposite the curved lands and is configured to provide fluid communication from the service inlet port to the service outlet port.

REFERENCES:
patent: 2695036 (1954-11-01), Kronhiem
patent: 2989081 (1961-06-01), Olsen
patent: 3090396 (1963-05-01), Rudelick
patent: 3509998 (1970-05-01), Pellett et al.
patent: 3570520 (1971-03-01), Sedi
patent: 3643692 (1972-02-01), Traylor
patent: 3926071 (1975-12-01), Elliott
patent: 4278109 (1981-07-01), Ortega
patent: 4469131 (1984-09-01), Traylor
patent: 4632150 (1986-12-01), Gagas
patent: 5152321 (1992-10-01), Drager et al.
patent: 5174337 (1992-12-01), Dahlen et al.

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