Title:
CHECK VALVE
Document Type and Number:
WIPO Patent Application WO/2014/021124
Kind Code:
A1
Abstract:
Provided is a compact, low-cost check valve that can suppress pressure loss and can securely prevent backflow of a fluid. The check valve is provided with the following: a tubular body that forms part of a flow path through which a fluid flows; a first housing with a first valve hole through which the fluid flows, with a valve seat section formed on the downstream side of the inner circumference surface of the first valve hole; a valve body with a flat section at the peak thereof and comprising a valve head section that expands in diameter in a tapered shape toward the downstream side and a support rod linked to the valve head section; a spring member that impels the valve body toward the valve seat section; and a second housing comprising a connecting section that has a second valve hole, and a cylindrical body that is open to the upstream side and that has a receiving surface on the downstream side for one end of the spring member and a sliding hole in the center section through which the support rod of the valve body slides; wherein the cylindrical body of the second housing decreases in diameter in a tapered shape toward the downstream side and has therein a cutaway section formed in the upper edge opposing one surface in the downstream side of the valve head section of the valve body.
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Inventors:
AKAIKE NAOKI (JP)
Application Number:
PCT/JP2013/069757
Publication Date:
February 06, 2014
Filing Date:
July 22, 2013
Export Citation:
Assignee:
TAKAHATA PREC JAPAN CO LTD (JP)
International Classes:
F16K15/06
Foreign References:
| JPS5937375A | 1984-02-29 | |||
| JPH07293720A | 1995-11-10 | |||
| JP2007143918A | 2007-06-14 | |||
| JPH0735897U | 1995-07-04 | |||
| JP2001280521A | 2001-10-10 | |||
| JP2004360820A | 2004-12-24 | |||
| JPH09178009A | 1997-07-11 |
Attorney, Agent or Firm:
SEZAKI YUKINORI (JP)
Yukinori Sezaki (JP)
Yukinori Sezaki (JP)
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