Variable flow control valves

Details Variable flow control valves Variable flow control valves

2005-06-21

2005-06-21

Look, Edward K. (Department: 3751)

Valves and valve actuation

Rotary valves

Butterfly

C251S317000, C277S549000

Reexamination Certificate

active

06908072

ABSTRACT:
A variable flow control valve (1) includes a valve member (4) and a valve body (2). A seal member (5) is mounted on the peripheral portion of the valve member and has end portions (5a) in a circumferential direction of the valve member. The valve body may define a flow channel (2) and the valve member is rotatably disposed within the flow channel. A seat surface (2b) is disposed on an inner wall of the flow channel and has end portions in a circumferential direction of the inner wall. The seal member of the valve member opposes to the seat surface when the valve member is in a close position. Projections (2c) are disposed adjacent to the end portions of the seat surface and serves to engage the respective end portions of the seal member when the valve member is in the close position.

REFERENCES:
patent: 4032108 (1977-06-01), Kintner
patent: 5669350 (1997-09-01), Altmann et al.
patent: 6135418 (2000-10-01), Hatton
patent: 7279676 (1995-10-01), None

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