FLOW RATE CONTROL ROTARY VALVE

WIPO Patent Application WO/1995/022023

A1

An inner circumferential surface of a housing (1) rotatably supports a rotary shaft (4) via a pair of bearings (3), and a valve disc (5) fixed to the rotary shaft (4) controls the opening of at least one of inlet hole (19) and outlet hole (14) both made open in the inner circumferential surface. A biassing means (25) biasses the two bearings (3) towards one of the two holes. Therefore, the valve disc (5) is displaced toward or pressed against an inner circumferential surface of a collar (2) by the biassing means (25) via the two bearings (3), whereby it is possible to reduce leakage that would take place when the valve is closed. Due to this, even if a combination of the housing (1) and valve disc (5) which have a large linear expansion coefficient difference is selected, it is still possible to reduce leakage, this increasing the degree of freedom in selection of combination of raw materials. In addition, even if there is a large difference in linear expansion coefficient between the housing (1) and the bearings (3), there is no risk of the bearings (3) being loosened due to the expansion of the collar (2), and therefore it is possible to select various types of materials such as resin as a material for the housing.

SUGIHARA SHINJI (JP)
FURUKAWA AKIRA (JP)

PCT/JP1995/000157

August 17, 1995

February 07, 1995

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NIPPON DENSO CO (JP)
SUGIHARA SHINJI (JP)
FURUKAWA AKIRA (JP)

F02D9/16; F02M3/07; F16K5/04; (IPC1-7): F16K3/22

JPH0658145U	1994-08-12
JPH0658146U	1994-08-12
JPH04125668U	1992-11-16
JPH05215051A	1993-08-24
JPS61181166U	1986-11-12
JPS5734424Y2	1982-07-29
JPS5393733U	1978-07-31

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