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US 2025/0154950 A1Published application
Uniaxial eccentric screw pump
AssigneeHEISHIN Ltd.
InventorsEiji UETSUJI, Noriaki SAKAKIHARA
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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 shaft placed through the insertion hole in the stator. The insertion hole is, in a cross section, an opening including a middle area and two end areas. An interference amount between an outer peripheral surface of the rotor and the inner peripheral surface of the insertion hole in the stator is smaller in the middle area than in the two end areas.
Claims14
A uniaxial eccentric screw pump, comprising:
- 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,
- wherein the insertion hole is, in a cross section, an opening including a middle area and two end areas, and an interference amount between an outer peripheral surface of the rotor and the inner peripheral surface of the insertion hole in the stator is smaller in the middle area than in the two end areas.
1 more element
Dependencies are inferred from the claim text.