The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2025
Filed:
Sep. 20, 2022
Applicant:
Heishin Ltd., Hyogo, JP;
Inventors:
Eiji Uetsuji, Shiga, JP;
Noriaki Sakakihara, Osaka, JP;
Assignee:
HEISHIN Ltd., Hyogo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04C 2/107 (2006.01);
U.S. Cl.
CPC ...
F04C 2/1075 (2013.01); F04C 2230/91 (2013.01); F05C 2253/12 (2013.01);
Abstract
A uniaxial eccentric screw pump includes a stator having an insertion hole with an inner peripheral surface being internally threaded, and a rotor including a shaft being externally threaded and placed through the insertion hole in the stator. The stator has the insertion hole being an opening in a cross section, the opening includes a middle area and two end areas, and the middle area has lower contact pressure at least in a middle of the middle area than at two ends of the middle area.