SINGLE-SHAFT ECCENTRIC SCREW PUMP

Title:

SINGLE-SHAFT ECCENTRIC SCREW PUMP

Document Type and Number:

WIPO Patent Application WO/2012/102288

Kind Code:

A1

Abstract:

[Problem] To provide a single-shaft eccentric screw pump with which a flexible rod and a rotor can easily be connected without producing backlash, and with which problems such as fretting wear, breaking of the shaft due to the concentration of stress, and corrosion due to the infiltration of fluids can be prevented. [Solution] In a single-shaft eccentric screw pump, a flexible rod (62) and a rotor (30) are connected via a connecting structural part (100). The connecting structural part (100) is formed by inserting and screwing a threaded shaft (104), which is provided on the tip of the flexible rod (62), into a shaft insertion hole (110) provided in the end face (112) of the rotor (30). A flange part (102) on the flexible rod (62) side makes surface contact with the end face on the rotor (30) side in the connecting structural part (100).

Inventors:

KUWAYAMA AKITAKA (JP)
SAEKI TAISUKE (JP)

Application Number:

PCT/JP2012/051501

Publication Date:

August 02, 2012

Filing Date:

January 25, 2012

Export Citation:

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Assignee:

HEISHIN LTD (JP)
KUWAYAMA AKITAKA (JP)
SAEKI TAISUKE (JP)

International Classes:

F04C2/107; F16B7/18; F16B7/20

Foreign References:

JP3030265B2	2000-04-10
JPS5783722A	1982-05-25
JPS61142379A	1986-06-30
JP2009236306A	2009-10-15
JP2003239923A	2003-08-27
JPH08284917A	1996-11-01
JPH02240407A	1990-09-25
JP2009174582A	2009-08-06
JP3629100B2	2005-03-16
JP3030265B2	2000-04-10

Other References: