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Patent Searching and Data

Document Type and Number:
Japanese Patent JPS4928727
Kind Code:
A control valve device for closing and opening a fluid passage in response to a pressure signal is provided with a chamber composed of a pair of bellows for elongating and crumpling in accordance with the pressure signal thereby to achieve adequate closing and opening operation in such dusty and high temperature fluid as the exhaust gas emitted from an internal combustion engine.

Application Number:
Publication Date:
March 12, 1974
Filing Date:
June 15, 1972
Export Citation:
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International Classes:
F02M25/07; F16K31/126; F16K31/365; (IPC1-7): F16K31/365; F16K31/126