Hydraulic Control Device for Work Machine
US-2015300378-A1 · Oct 22, 2015 · US
Cylinder with check valve
US10920802B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10920802-B2 |
| Application number | US-201916242454-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 8, 2019 |
| Priority date | Dec 20, 2017 |
| Publication date | Feb 16, 2021 |
| Grant date | Feb 16, 2021 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A harvester head having at least one hydraulic actuator with a cylinder and a piston. The hydraulic actuator having at least a cylinder chamber and a piston rod chamber, both chambers being connected to a hydraulic circuit. The piston separating the cylinder chamber and the piston rod chamber, a cavity provided in the piston, hydraulically connecting the cylinder chamber with the piston rod chamber and a check valve in connection with the cavity that allows hydraulic medium flow in an opening direction of the check valve.
First claim
Opening claim text (preview).
What is claimed is: 1. A harvester head for forestry applications comprising: at least one hydraulic actuator with a cylinder and a piston, the hydraulic actuator having at least a cylinder chamber and a piston rod chamber, the piston separating the cylinder chamber and the piston rod chamber, the cylinder chamber and the piston rod chamber being connected to a hydraulic circuit, a cavity is provided in the piston, hydraulically coupling the cylinder chamber with the piston rod chamber, a check valve is in connection with the cavity, allowing a hydraulic medium flow in an opening direction of the check valve, so that hydraulic medium can flow through the cavity and the check valve, wherein an orifice is provided downstream next to the check valve in the flow direction of the hydraulic medium through the check valve, wherein the orifice has a smaller diameter than the cavity. 2. A harvester head for forestry applications comprising: at least one hydraulic actuator with a cylinder and a piston, the hydraulic actuator having at least a cylinder chamber and a piston rod chamber, the piston separating the cylinder chamber and the piston rod chamber, the cylinder chamber and the piston rod chamber being connected to a hydraulic circuit, a cavity is provided in the piston, hydraulically coupling the cylinder chamber with the piston rod chamber, a check valve is in connection with the cavity, allowing a hydraulic medium flow in an opening direction of the check valve, so that the hydraulic medium can flow through the cavity and the check valve, wherein the hydraulic medium flow is reduced downstream of the check valve.
Assignees
Inventors
Classifications
- A01G23/083Primary
Feller-delimbers · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10920802B2 cover?
- A harvester head having at least one hydraulic actuator with a cylinder and a piston. The hydraulic actuator having at least a cylinder chamber and a piston rod chamber, both chambers being connected to a hydraulic circuit. The piston separating the cylinder chamber and the piston rod chamber, a cavity provided in the piston, hydraulically connecting the cylinder chamber with the piston rod cha…
- Who is the assignee on this patent?
- Deere & Co
- What technology area does this patent fall under?
- Primary CPC classification A01G23/083. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Feb 16 2021 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).