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Title:
UNIAXIAL ECCENTRIC SCREW PUMP
Document Type and Number:
WIPO Patent Application WO/2023/139844
Kind Code:
A1
Abstract:
This uniaxial eccentric screw pump comprises: a stator 2 which has an insertion hole 14 having an inner circumferential surface formed in the shape of a female thread; and a rotor 3 comprising a male threaded shaft body which is inserted through the insertion hole 14 of the stator 2. An opening 15 of the insertion hole 14 that appears in a cross section through the stator 2 comprises a central region 18 and two end regions 19, and in the central region 18, a surface pressure at a central side thereof, at least, is less than a surface pressure on both end sides thereof.

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Inventors:
UETSUJI EIJI (JP)
SAKAKIHARA NORIAKI (JP)
Application Number:
PCT/JP2022/034893
Publication Date:
July 27, 2023
Filing Date:
September 20, 2022
Export Citation:
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Assignee:
HEISHIN LTD (JP)
International Classes:
F04C2/107; F04C15/00
Domestic Patent References:
WO2008075507A12008-06-26
Foreign References:
JP2016079971A2016-05-16
JPS6220684A1987-01-29
JPS57176378A1982-10-29
JPH07501374A1995-02-09
JP2015135100A2015-07-27
JP2016142188A2016-08-08
JP2010001876A2010-01-07
JPH06500615A1994-01-20
CN211059004U2020-07-21
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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