Valve actuating device with opening reduced speed
AssigneeLuxembourg Patent Company S.A.
InventorsPaul Muzzo, Jean-Claude Schmitz
Life of this patent
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Abstract
The invention is directed to a valve actuating device comprising a body with a bore and a bottom, an actuating element sealingly housed in the bore of the body and forming a first chamber with the body, a piston sealingly extending through a bore in the actuating element, the piston and bore delimiting a second actuating chamber, a passage for an auxiliary fluid between the first and second chambers so that a movement of the piston in the bore of the actuating member can increase the pressure in the first chamber and move the actuating element. The fluid passage comprises a restriction and a check-valve, both arranged in parallel, so as to limit the flow of the auxiliary fluid from the second chamber to the first chamber.
Claims20
A valve actuating device, said valve actuating device comprising:
- a body with a bore and a bottom;
- an actuating element sealingly housed in the bore of the body and forming a first chamber with the bottom of the body;
- a piston with a portion sealingly extending through a bore in the actuating element, the portion and bore of the actuating element delimiting a second actuating chamber;
- an auxiliary fluid in the first and second chambers;
- and
- an auxiliary fluid passage between the first and second chambers so that a movement of the piston in the bore of the actuating member can increase the pressure in the first chamber and move the actuating element, wherein
- the auxiliary fluid passage between the first and second chambers comprises a restriction and a check-valve, both arranged in parallel, so as to limit the flow of the auxiliary fluid from the second chamber to the first chamber.
A valve for a fluid, said valve comprising:
- a seat;
- a closure member that is movable in translation along a main axis for cooperating with the seat for shutting-off of a fluid passage;
- and
- an actuating device for actuating the closure member, wherein
- the actuating device comprises
- a body with a bore and a bottom;
- an actuating element sealingly housed in the bore of the body and forming a first chamber with the bottom of the body;
- a piston with a portion sealingly extending through a bore in the actuating element, the portion and bore of the actuating element delimiting a second actuating chamber;
- an auxiliary fluid in the first and second chambers;
- and
- an auxiliary fluid passage between the first and second chambers so that a movement of the piston in the bore of the actuating member can increase the pressure in the first chamber and move the actuating element, wherein
- the auxiliary fluid passage between the first and second chambers comprises a restriction and a check-valve, both arranged in parallel, so as to limit the flow of the auxiliary fluid from the second chamber to the first chamber.
A system for outputting a gas stored in a compressed state in a gas cylinder, wherein the system comprises:
- a valve, wherein the valve comprises:
- a seat;
- a closure member that is movable in translation along a main axis for cooperating with the seat for shutting-off of a fluid passage;
- and
- an actuating device for actuating the closure member, wherein
- the actuating device comprises
- a body with a bore and a bottom;
- an actuating element sealingly housed in the bore of the body and forming a first chamber with the bottom of the body;
- a piston with a portion sealingly extending through a bore in the actuating element, the portion and bore in the actuating element delimiting a second actuating chamber;
- an auxiliary fluid in the first and second chambers;
- and
- an auxiliary fluid passage between the first and second chambers so that a movement of the piston in the bore of the actuating member can increase the pressure in the first chamber and move the actuating element, wherein
- the auxiliary fluid passage between the first and second chambers comprises a restriction and a check-valve, both arranged in parallel, so as to limit the flow of the auxiliary fluid from the second chamber to the first chamber;
- wherein the portion of the piston that extends through the bore of the actuating member is a first portion, the piston comprising a second portion of a larger diameter and sealingly housed in a further bore, the further bore and second portion delimiting a third chamber, and
- a pneumatic control unit to be pneumatically connected between a compressed air source and the third chamber of the actuating device of the valve, the pneumatic control unit comprising a flow restrictor and, in parallel, a check valve oriented such as to close when filling the third chamber so as to force the compressed air towards the flow restrictor, and to open when emptying the chamber so as to by-pass the restrictor.
Dependencies are inferred from the claim text.