US 7,150,445 B2Granted

Valve device having a long adjustment stroke

AssigneeSnecma Moteurs

InventorsOlivier Faye, Jean Luc Pattyn, William Barre

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Abstract

The invention provides a control valve device enabling the positioning precision of its abutment to be reduced without reducing the overall control precision of the valve. For this purpose, the valve device comprises a valve body defining a fluid flow duct in which there is disposed a shutter element turned by an actuator by means of a drive shaft. The shutter element is formed by a skirt presenting a notch forming an opening in the wall of the skirt. The notch is shaped in such a manner as to define a variable flow passage in the duct as a function of the angular position of the shutter element between an open position in which the notch co-operates in full with the duct, and a closed position in which said skirt closes the duct.

Claims14

Dependent claims

A control valve device comprising a valve body defining a fluid flow duct in which a shutter element is disposed that is turned by actuator means via a drive shaft, wherein the shutter element is a hollow body formed of a surrounding wall closed at a top portion that is connected to the drive shaft and open at a bottom portion that is larger in dimension than the top portion, the surrounding wall having a notch, the notch providing a sloping profile defining an opening that tapers progressively going away from the bottom portion of the surrounding wall, the notch being profiled so as to define a variable flow section in the duct as a function of the angular position of said shutter element between a closed position in which the bottom portion of the hollow body closes off the duct and an open position in which the bottom portion of the hollow body is fully retracted from the fluid flow duct so as to allow the fluid to flow freely in the duct.

Dependencies are inferred from the claim text.