Submersible actuator
US-11493062-B1 · Nov 8, 2022 · US
Pressure applying device
US12480536B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12480536-B2 |
| Application number | US-202318872725-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 16, 2023 |
| Priority date | Jun 17, 2022 |
| Publication date | Nov 25, 2025 |
| Grant date | Nov 25, 2025 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
There is provided a pressure applying device capable of applying pressure to a working object with a substantially constant force through a compact structure. The pressure applying device includes a pressure accumulating portion; a piston including a small-diameter portion inserted into a cylinder portion on a pressure accumulating portion side, and a large-diameter portion disposed close to a working object W; and a tubular body extending from the large-diameter portion to the cylinder portion. A lubricating fluid is held inside the tubular body.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A pressure applying device, comprising: a pressure accumulating portion; a piston including a small-diameter portion inserted into a cylinder portion on a pressure accumulating portion side, and a large-diameter portion disposed close to a working object; and a tubular body extending from the large-diameter portion to the cylinder portion, wherein a lubricating fluid is held inside the tubular body. 2 . The pressure applying device according to claim 1 , wherein the cylinder portion and the tubular body are slidable on each other. 3 . The pressure applying device according to claim 1 , wherein a breathing hole is formed at an upper portion of the tubular body. 4 . The pressure applying device according to claim 3 , wherein the breathing hole is provided at a position where the breathing hole is not closed when the tubular body is inserted the furthest into the cylinder portion. 5 . The pressure applying device according to claim 4 , further comprising: a movement restricting portion configured to restrict a movement of the tubular body in an insertion direction. 6 . The pressure applying device according to claim 1 , wherein the lubricating fluid is held such that a liquid level is at least at a height position of the small-diameter portion when the tubular body is inserted the furthest into the cylinder portion.
Assignees
Inventors
Classifications
Constructional details thereof · CPC title
Sealings therefor, e.g. piston rings · CPC title
having rigid separating means, e.g. pistons · CPC title
for restricting the stroke · CPC title
Control means for piston speed or actuating force without external control, e.g. control valve inside the piston (F15B11/02, F15B15/22 take precedence) · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12480536B2 cover?
- There is provided a pressure applying device capable of applying pressure to a working object with a substantially constant force through a compact structure. The pressure applying device includes a pressure accumulating portion; a piston including a small-diameter portion inserted into a cylinder portion on a pressure accumulating portion side, and a large-diameter portion disposed close to a …
- Who is the assignee on this patent?
- Eagle Ind Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F15B15/08. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 25 2025 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).