Valve assembly failsafe
US-11913370-B2 · Feb 27, 2024 · US
Screw pump and its components
US12560167B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12560167-B2 |
| Application number | US-202418734744-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 5, 2024 |
| Priority date | Jun 9, 2023 |
| Publication date | Feb 24, 2026 |
| Grant date | Feb 24, 2026 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
The disclosure relates to 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 lubricated polymer material.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A screw pump, comprising: a casing with an inlet, an outlet, and a shell; an insert housed within at least a portion of the shell, and including a flow chamber between the inlet and the outlet, and further including one or more anti-rotation protrusions, configured to inhibit relative rotation between the insert and the shell, wherein the one or more anti-rotation protrusions extend axially from the insert; 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 lubricated polymer material. 2 . The screw pump according to claim 1 , wherein the lubricated polymer material comprises polyphenylene sulfide. 3 . The screw pump according to claim 1 , wherein the lubricated polymer material comprises a fiber reinforced lubricated polymer material. 4 . The screw pump according to claim 3 , wherein the lubricated polymer material comprises a glass fiber reinforced polyphenylene sulfide. 5 . The screw pump according to claim 1 , wherein the flow chamber is defined by a tubular wall of the insert that has a substantially constant wall thickness. 6 . The screw pump according to claim 1 , wherein the insert comprises a lubricated polymer material. 7 . The screw pump according to claim 1 , wherein the insert comprises a lubricated polyphenylene sulfide material. 8 . The screw pump according to claim 1 , wherein the insert comprises a fiber reinforced lubricated polymer material. 9 . The screw pump according to claim 1 , wherein the insert comprises a glass fiber reinforced lubricated polyphenylene sulfide. 10 . The screw pump according to claim 1 , wherein at least one of the screws comprises a center shaft made of a first material on which the at least one of the screws is molded from a second material that is less stiff than the first material. 11 . The screw pump according to claim 10 , wherein the second material comprises lubricated polymer, such as a lubricated polyphenylene sulfide material. 12 . The screw pump according to claim 11 , wherein the second material comprises a fiber reinforced lubricated polymer material. 13 . The screw pump according to claim 12 , wherein the fiber reinforced lubricated polymer material comprises a glass fiber reinforced lubricated polyphenylene sulfide. 14 . The screw pump according to claim 1 , wherein at least one of the screws comprises threads with a helix angle of at least 60°.
Assignees
Inventors
Classifications
Fibres · CPC title
Composite, e.g. fibre-reinforced · CPC title
Self lubricating materials; Solid lubricants · CPC title
Synthetic polymers, e.g. plastics; Rubber · CPC title
Glass · CPC title
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Frequently asked questions
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- What does patent US12560167B2 cover?
- The disclosure relates to 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 lubricated polymer material.
- Who is the assignee on this patent?
- Illinois Tool Works
- What technology area does this patent fall under?
- Primary CPC classification F04C2/165. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 24 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).