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Title:
COVER-EQUIPPED STATOR FOR UNIAXIAL ECCENTRIC SCREW PUMP, AND UNIAXIAL ECCENTRIC SCREW PUMP
Document Type and Number:
WIPO Patent Application WO/2010/084537
Kind Code:
A1
Abstract:
A cover-equipped stator for a uniaxial eccentric screw pump is configured such that a condensate liquid accumulated between the outer surface of a stator and the inner surface of the cover when a high-temperature fluid is caused to flow in an inner hole in the stator is discharged to the outside of the cover.  The configuration extends the life of the stator and enhances the accuracy of a discharge flow rate. A cover-equipped stator (27) of a uniaxial eccentric screw pump (17) in which a male screw stator (3) is fitted in an inner hole (4a) in a rubber female screw stator (4) and in which a cover (18) is mounted to the outer surface of the stator (4), wherein the cover-equipped stator comprises a first discharge passage (22) for discharging a condensate liquid (15) to the outside of the cover (18).  The condensate liquid (15) is a liquid resulting from condensation of water vapor (13) evaporated from a liquid which flows in the inner hole (4a) in the stator (4), transmitted through the stator (4), and condensed and accumulated between the outer surface of the stator (4) and the inner surface of the cover (18).

Inventors:
OGAWA MASAKI
Application Number:
JP2009/005232
Publication Date:
July 29, 2010
Filing Date:
October 08, 2009
Export Citation:
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Assignee:
HEISHIN LTD (JP)
OGAWA MASAKI
International Classes:
F04C2/107; F04B19/12; F04C15/00
Foreign References:
JPS60173381A1985-09-06
JPH10153181A1998-06-09
JP2000283061A2000-10-10
JPH0510791U1993-02-12
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
Patent business corporation Owner old patent firm (JP)
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