Linear compressor
US-2021190059-A1 · Jun 24, 2021 · US
Control plate of a hydraulic machine and hydraulic machine
US12540604B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12540604-B2 |
| Application number | US-202318517151-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 22, 2023 |
| Priority date | Nov 28, 2022 |
| Publication date | Feb 3, 2026 |
| Grant date | Feb 3, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A control plate ( 18 ) of a hydraulic machine is described, the control plate ( 18 ) includes a body ( 21 ), an arrangement of openings ( 22, 23 ), and a contact face ( 24 ). In order to operate a hydraulic machine with a low noise level the body ( 21 ) is made of a plastic material. The control plate may be used as port plate or as valve plate.
First claim
Opening claim text (preview).
What is claimed is: 1 . A control plate for slidably engaging a pressure plate of a hydraulic machine, the control plate comprising a body, an arrangement of openings, and a contact face, wherein the body is made of a flat plastic material, wherein the plastic material is a fibre reinforced plastic material, wherein the fibre reinforced plastic material includes fibres arranged in layers, and wherein the layers are stacked in a direction perpendicular to the contact face. 2 . The control plate according to claim 1 , wherein the plastic material comprises friction reducing properties. 3 . The control plate according to claim 1 , wherein at least in a thickness region adjacent the contact face more than 50% of the fibres include an angle with the contact face of less than 30°. 4 . The control plate according to 3 , wherein the plastic material comprises a fibre content of at least 55%. 5 . The control plate according to claim 1 , wherein the plastic material comprises a fibre content of at least 55%. 6 . The control plate according to claim 1 , wherein the fibres are made of carbon and/or a ceramic filler. 7 . The control plate according to claim 1 , wherein the body is made from a number of prepregs. 8 . The control plate according to claim 1 , wherein the contact face comprises a circular sliding track and the surface of the contact face is smoother in the sliding track than in a region of the contact face outside the sliding track. 9 . The control plate according to claim 1 , wherein the material of the body is softer than steel. 10 . A hydraulic machine comprising the control plate according to claim 1 . 11 . The hydraulic machine according to claim 10 , wherein the body of the control plate is radially surrounded by a reinforcing ring. 12 . The hydraulic machine according to claim 11 , wherein the reinforcing ring is made of steel. 13 . A control plate for slidably engaging a pressure plate of a hydraulic machine, the control plate comprising a body, an arrangement of openings, and a contact face, wherein the body and the contact face are made from a plurality of fibre reinforced prepreg layers and wherein a fibre reinforced prepreg layer forming the contact face is parallel to the contact face. 14 . The control plate according to claim 13 , wherein at least in a thickness region adjacent the contact face more than 50% of the fibres include an angle with the contact face of less than 30°. 15 . A control plate for slidably engaging a pressure plate of a hydraulic machine, the control plate comprising a body, an arrangement of openings, and a contact face, wherein the body and the contact face are made of a plastic material reinforced by fibres, and wherein at least in a thickness region adjacent the contact face more than 50% of the fibres include an angle with the contact face of less than 30°. 16 . The control plate according to claim 15 , wherein the plastic material comprises a fibre content of at least 55%.
Assignees
Inventors
Classifications
Valves · CPC title
- F04B1/303Primary
by turning the valve plate · CPC title
plate-like · CPC title
Valves characterised by the material · CPC title
Swash plates · CPC title
Patent family
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12540604B2 cover?
- A control plate ( 18 ) of a hydraulic machine is described, the control plate ( 18 ) includes a body ( 21 ), an arrangement of openings ( 22, 23 ), and a contact face ( 24 ). In order to operate a hydraulic machine with a low noise level the body ( 21 ) is made of a plastic material. The control plate may be used as port plate or as valve plate.
- Who is the assignee on this patent?
- Danfoss As
- What technology area does this patent fall under?
- Primary CPC classification F04B1/303. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 03 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).