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US 7,681,553 B2Granted
Nested three chambers, fluid pulsation dampener
AssigneePulsco, Inc.
InventorsSorin Cora, John E. Kaiser, Richard J. Serocki
Life of this patent
Estimating the term…
Abstract
A reactive acoustic dampener includes a nested three chambered configuration and connecting tubes that may be fully integrated into the fuel rail of a fuel injection system.
Claims21
A pulsation dampener comprising:
- a first outer tube having at least one socket;
- an inner tube in coaxial arrangement with said first outer tube, said inner tube having a first end and a second end, wherein said second end has a helical groove on its external surface;
- a stem of a first plug supporting said inner tube at said first end, said stem having a helical groove on its outer surface;
- a cylindrical second plug inserted at said second end, said cylindrical second plug having a helical groove its outer surface;
- and
- a second outer tube having one end partially inserted into an end of said first outer tube and concentrically placed over said second end of said inner tube.
3 more elements
A pulsation dampener for fuel injection systems comprising:
- a first outer tube having at least one radial injector socket;
- an inner tube in coaxial arrangement with said first outer tube, said inner tube having a first end and a second end, wherein said second end has a helical groove about its outer surface;
- a stem of a first plug inserted in said inner tube at said first end, said stem having a helical groove on its outer surface, wherein said stem supports said inner tube;
- a cylindrical second plug inserted at said second end, said cylindrical second plug having a helical groove on its outer surface;
- and
- a second outer tube having one end partially inserted into an end of said first outer tube and placed over said second end of said inner tube.
3 more elements
A reactive pulsation dampener for fuel injection systems comprising:
- a hollow first outer tube having at least one radial injector socket, said first outer tube lodging inside a smaller hollow inner tube, said inner tube being supported and plugged at one end by the stem of a first plug, said inner tube and said first outer tube defining an annular volume sealed at one end by the said first plug and communicating with the first inner volume of said inner tube through helical grooves machined on the cylindrical surface of the stem of said first plug, said inner tube being plugged at the opposite end by a cylindrical second plug, said second plug having a helical groove machined on its outer surface;
- and
- a hollow second outer tube, having one end partially inserted in the opposite end of said first outer tube and concentrically placed over the other end of said inner tube, said second outer tube being sealed at the opposite end by a third plug which has inner threads to accommodate the fluid inlet port of the dampener, said third plug also defining a second inner volume in the said second outer tube, said second inner volume communicating with the said first inner volume through the helical groove of said second plug and with the said annular volume through the groove of said first inner tube.
Dependencies are inferred from the claim text.