The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2017
Filed:
May. 14, 2014
Applicant:
Airbus Helicopters, Marignane, FR;
Inventors:
Assignee:
AIRBUS HELICOPTERS, Marignane, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 13/01 (2006.01); F16K 11/07 (2006.01); B64C 27/605 (2006.01); B64C 27/64 (2006.01); F15B 20/00 (2006.01); B64C 13/40 (2006.01); F15B 11/02 (2006.01); F15B 13/04 (2006.01);
U.S. Cl.
CPC ...
F15B 13/01 (2013.01); B64C 13/40 (2013.01); B64C 27/605 (2013.01); B64C 27/64 (2013.01); F15B 11/02 (2013.01); F15B 13/0402 (2013.01); F15B 20/008 (2013.01); F16K 11/07 (2013.01); F16K 11/0704 (2013.01); F16K 11/0708 (2013.01); F15B 2211/8636 (2013.01); F15B 2211/8752 (2013.01); F15B 2211/8757 (2013.01);
Abstract
A hydraulic valve (') of a servo-control for feathering the blades () of a rotorcraft rotor. The hydraulic valve (′) comprises a main valve member () and an emergency valve member () blocked relative to a valve cylinder () of the hydraulic valve (′) by means of a pin () in sliding thrust engagement in a cavity () of the emergency valve member (). Relative movement between the emergency valve member () and the valve cylinder () initiating sliding movement of the pin () inside the cavity () and causing mover means () for moving the pin () to be put into operation, thereby releasing the emergency valve member () to move freely.