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Title:
BACKFLOW PREVENTING DEVICE
Document Type and Number:
Japanese Patent JP2007010032
Kind Code:
A
Abstract:

To provide a backflow preventing device with check valves easy to mount/demount, having improved durability by supporting and fixing the check valves into a valve box in a stable and firm state.

The backflow preventing device comprises the valve box 1 having a suction port 2 and a discharge port 3, and the unit-structure primary side check valve 5 and the unit-structure secondary side check valve 6 removably provided in the valve box 1 for opening/closing the suction port 2 and for opening/closing the discharge port, respectively. In this case, a supporting member 38 is provided in the valve box 1 between both check valves 5, 6. The supporting member 38 has a retaining member 39 for abutting on one check valve 5 and a retaining member 40 for abutting on the other check valve 6. A set screw 44 is provided on the retaining member 39. The fastening of the set screw 44 presses the supporting member 38 against both check valves 5, 6 to fix both check valves 5, 6 into the valve box 1.


Inventors:
SADOSHIMA SHIGERU
SAKATANI TETSUNORI
Application Number:
JP2005191295A
Publication Date:
January 18, 2007
Filing Date:
June 30, 2005
Export Citation:
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Assignee:
KAWAMOTO PUMP MFG
International Classes:
F16K15/16; F16K15/06
Domestic Patent References:
JPH0412556U1992-01-31
JP2003014147A2003-01-15
JPH1182776A1999-03-26
JPS63180777U1988-11-22
JP2004360820A2004-12-24
JPH0412556U1992-01-31
JP2003014147A2003-01-15
JPH1182776A1999-03-26
JPS63180777U1988-11-22
JP2004360820A2004-12-24
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto



 
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