Electro hydrostatic actuator system for retracting/extending landing gear
US-9422052-B2 · Aug 23, 2016 · US
Method for securing an aircraft wheel drive actuator in an open position
US11014653B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11014653-B2 |
| Application number | US-201916682939-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 13, 2019 |
| Priority date | Nov 14, 2018 |
| Publication date | May 25, 2021 |
| Grant date | May 25, 2021 |
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.
A method for securing an aircraft landing gear wheel drive actuator in an open position of the wheel, the drive actuator being movably mounted on the landing gear between said open position in which it is remote from the wheel and an engaged position in which it cooperates with the wheel to ensure its rotational drive, a displacement actuator being coupled to the drive actuator to move same between the two positions, and a locking member being provided to lock the drive actuator in the open position. The method includes holding the controlled displacement actuator to move the drive actuator to the open position, while the drive actuator is locked in the open position.
First claim
Opening claim text (preview).
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. A method for securing a rotating drive actuator of an aircraft landing gear wheel in an open position of the aircraft landing gear wheel, the drive actuator being movably mounted on a landing gear between said open position in which it is remote from the aircraft landing gear wheel and an engaged position in which it cooperates with the aircraft landing gear wheel to ensure its rotating drive, a displacement actuator being coupled to the drive actuator to move it between the open position and the engaged position, and a locking member being arranged to lock the drive actuator in the open position, the method comprising a step, while the drive actuator is locked in the open position, of holding the displacement actuator under control to move the drive actuator to the open position. 2. The method according to claim 1 , wherein a hydraulic supply circuit for the displacement actuator is provided with a selector having a stable rest position in which the displacement actuator is controlled to move the drive actuator to the open position. 3. The method according to claim 2 , wherein the selector has a controlled position for depressurizing the hydraulic supply circuit. 4. The method according to claim 2 , wherein the selector has an operational controlled position in which the displacement actuator can be controlled by a servo control member. 5. The method according to claim 4 , wherein the hydraulic supply circuit is equipped with a mode valve which is supplied with a supply pressure only if the selector is in the operational controlled position, and which has a stable rest position in which the supply pressure is redirected to the displacement actuator to move the drive actuator to the open position, and an activation position in which the supply pressure is supplied to the servo control member of the displacement actuator.
Assignees
Inventors
Classifications
- B64C25/34Primary
wheeled type, e.g. multi-wheeled bogies · CPC title
having locking means · CPC title
Fluid supply for locking or release independent of actuator pressurisation · CPC title
Locking mechanisms · CPC title
fluid · 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 US11014653B2 cover?
- A method for securing an aircraft landing gear wheel drive actuator in an open position of the wheel, the drive actuator being movably mounted on the landing gear between said open position in which it is remote from the wheel and an engaged position in which it cooperates with the wheel to ensure its rotational drive, a displacement actuator being coupled to the drive actuator to move same bet…
- Who is the assignee on this patent?
- Liegeois Pierre Yves, Thoraval Bruno, Safran Landing Systems
- What technology area does this patent fall under?
- Primary CPC classification B64C25/34. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 25 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).