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US 12,644,452 B2Granted
Screw pump and its components
AssigneeIllinois Tool Works Inc.
InventorsLionel Martin, Didier Richard
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet, and at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow through the flow chamber from the inlet to the outlet, wherein at least one of the screws (4) comprises a center shaft (40) made of a first material on which the screw is molded from a second material.
Claims19
A screw pump comprising:
- a casing with an inlet, an outlet and a flow chamber between the inlet and the outlet;
- and
- at least two screws housed in the flow chamber to force a fluid flow through the flow chamber from the inlet to the outlet;
- wherein at least one of the screws comprises a center shaft made of a first material on which the screw is molded from a second material,
- wherein the at least one screw comprises lubricated polyphenylene sulfide filled with glass fibers wherein each screw comprises a release coupling to restrict rotation of the screw when it is being extracted from a molding tool.
2 more elements
A method of manufacturing a screw for a screw pump, the method comprising:
- providing a center shaft made of a first material;
- and
- molding a screw on the center shaft using a second material,
- wherein the screw comprises lubricated polyphenylene sulfide filled with glass fibers wherein each screw comprises a release coupling to restrict rotation of the screw when it is being extracted from a molding tool.
1 more element
Dependencies are inferred from the claim text.