Compact Electro-Hydraulic Actuator

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2013-VACC-66601
Electro-hydraulic actuators (EHAs) are well known for their uses in many applications and offer several advantages such as compactness, versatility, and weight reductions. Current EHAs using gear pumps are easy to manufacture, but have lower efficiency than other EHAs. Prior EHA systems do not guarantee the actuator speed control or the load hold.

Researchers at Purdue University have developed a compact EHA that is fully contained within an enclosed housing and offers improved performance compared to current devices. The EHA uses a fixed displacement gear pump, which ensures proper gear meshing and allows the actuator to be held in place regardless of external loading. The design also uses a unique valve system to save both weight and cost when compared to existing products. This EHA utilizes an external reservoir for easier maintenance of the system and manual safety valves that guarantee better release of the actuator in case of flow generation unit failure.

Advantages:
-Saves weight and cost
-Actuator can be held in a fixed position regardless of the load
-Easier maintenance for the system

Potential Applications:
-Aircraft
-Cargo and vehicle doors
-Hatches and landing gears
Feb 18, 2016
NATL-Patent
United States
10,138,908
Nov 27, 2018

Nov 26, 2018
CON-Patent
United States
(None)
(None)

Mar 18, 2016
NATL-Patent
European Patent
(None)
(None)

Aug 19, 2014
PCT-Patent
WO
(None)
(None)

Aug 19, 2013
Provisional-Patent
United States
(None)
(None)
Purdue Office of Technology Commercialization
1801 Newman Road
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org