US 2016/0098045 A1Published application

Aircraft hydraulic valve

AssigneeNabtesco Corporation

InventorKoji ITO

Life of this patent

Estimating the term…

Loading patent…

Abstract

An aircraft hydraulic valve includes a housing, a check valve, a valve opening component, and an auxiliary hydraulic pressure supply mechanism. The housing includes a first port communicated with a first chamber of a hydraulic actuator, a second port communicated with a switch valve bypass-communicating a second chamber of the hydraulic actuator with the first chamber, and an oil channel connecting the first and second ports. The check valve interrupts oil flow from the first port to the second port. The valve opening component is configured to open the check valve with pilot pressure supplied from the second chamber. The auxiliary hydraulic pressure supply mechanism obtains hydraulic pressure, for opening the check valve, from a closed hydraulic pressure section, which is defined in the oil channel between the check valve and the first port.

Claims9

Dependent claims

An aircraft hydraulic valve comprising:

a housing that includes
a first port adapted to communicate with a first hydraulic chamber of a hydraulic actuator that drives a flight control surface,
a second port adapted to communicate with a switch valve capable of communicating a second hydraulic chamber of the hydraulic actuator with the first hydraulic chamber via a bypass, and
an oil channel that connects the first port and the second port;
a check valve that interrupts a flow of oil from the first port to the second port in the oil channel of the housing;
a valve opening component configured to open the check valve with pilot pressure supplied from the second hydraulic chamber;
and
an auxiliary hydraulic pressure supply mechanism that obtains hydraulic pressure, for opening the check valve, from a closed hydraulic pressure section, wherein the closed hydraulic pressure section is defined in the oil channel between the check valve and the first port.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/870,938Filed 30 Sep 2015
Priority: JP 2014-2029121 Oct 2014
Published: 7 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B64C 13/505
Using electrical energy: having duplication or stand-by provisions
F15B 9/10
Controlled by valves affecting the fluid feed or the fluid outlet of the servomotor: in which the controlling element and the servomotor each…
F15B 13/024
Fluid distribution or supply devices characterised by their adaptation to the control of servomotors: pressure relief valves
F15B 13/027
Fluid distribution or supply devices characterised by their adaptation to the control of servomotors: check valves