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Patent Searching and Data


Title:
サージ防止ガスシステム
Document Type and Number:
Japanese Patent JP4813057
Kind Code:
B2
Abstract:
A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves located within a housing and integrating a pressurization orifice. The initial opening of the valve in an axial direction enables gas to flow through the pressurization orifice at a first flow rate. The full opening of the valve in the axial direction enables the gas to flow through the second valve at a second flow rate, which is much higher than the first flow rate. The controlled pressurization of the gas through the orifice delays the time during which the gas reaches full recompression. The valve may be further provided with a vent for venting pressurized gas away from a nominally closed top surface of the lower valve element. The valve may be also provided with a valve inlet tube extending into a gas cylinder to prevent contaminants, particles and/or impurities from entering the valve. In a preferred embodiment of the invention, the valve has a deformable seal element that is sealed on both sides when the main passageway is closed. The deformable element, which may be an apertured disk, may be resiliently bowed or preloaded. This helps the disk remain in the desired position against a first one of the valve seats even after the disk is permanently deformed by the first valve seat.

Inventors:
Kevin Crowpa
William Jay Cullman
Application Number:
JP2004519711A
Publication Date:
November 09, 2011
Filing Date:
July 01, 2003
Export Citation:
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Assignee:
Allied Healthcare Products, Inc.
International Classes:
F16K47/02; F16K1/02; F16K1/30; F16K1/52; F16K1/54; F16K31/44; F16K39/02; F17C13/04
Domestic Patent References:
JP5219736U
JP5673268A
JP2003506650A
Foreign References:
US20030056839
US20020056479
WO2001011277A1
Attorney, Agent or Firm:
Kenji Sugimura
Tatsuya Sawada
Takahiro Yamazaki