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US 10,240,599 B2Granted
Uniaxial eccentric screw pump
AssigneeHEISHIN Ltd.
InventorKei Tanaka
Life of this patent
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Abstract
A uniaxial eccentric screw pump includes: a casing; a stator having one end portion thereof connected to the casing and having an inner peripheral surface which is formed into a female threaded shaped; a rotor configured to be insertable into the stator and formed of a shaft body having a male threaded shape; and an end stud connected to the other end portion of the stator. The stator is configured to be expandable and shrinkable in a radial direction.
Claims11
A uniaxial eccentric screw pump comprising:
- a casing;
- a thermally expandable stator having a first end portion connected to the casing and a second end portion opposite to the first end portion, and having a stator body configured to expand in an outer diameter direction when heated fluid passes across an inner peripheral surface which is formed into a female threaded shape;
- a rotor configured to be insertable into the stator and formed of a shaft body having a male threaded shape;
- an end stud connected to the second end portion of the stator;
- and
- a closure structure separate from the stator body including a seal structure having:
- a first flange portion formed on the second end portion of the stator and a second flange portion formed on the first end portion of the stator;
- a third flange portion formed on the end stud and brought into contact with the first flange portion;
- a fourth flange portion formed on the casing and brought into contact with the second flange portion;
- a first clamp portion configured with a first pair of semicircular clamp portions to clamp the first flange portion to the third flange portion;
- and
- a second clamp configured with a second pair of semicircular clamp portions to clamp the second flange portion to the fourth flange portion.
9 more elements
Dependencies are inferred from the claim text.