초록 ▼

This invention relates to a flapper check valve having a valve housing which has at least one outlet opening. A valve backer plate having a plurality of arcuate backer through holes is positioned generally parallel to a valve port plate having a plurality of arcuate port through holes. The valve por

This invention relates to a flapper check valve having a valve housing which has at least one outlet opening. A valve backer plate having a plurality of arcuate backer through holes is positioned generally parallel to a valve port plate having a plurality of arcuate port through holes. The valve port plate and valve backer plate are sealably secured with respect to the valve housing. In an open position of the flapper check valve, the backer through holes are in communication with the port through holes. At least one peripheral spacer/hermetic seal is positioned at a generally peripheral location relative to the valve port plate. Upon combustion within the combustion chamber, the flapper check valve prevents fluid/gas backflow in a direction from the valve backer plate to the valve port plate. At least one flat central spacer is positioned at a generally central location relative to the valve port plate and the valve backer plate. A plurality of inner spacer/guide pins are positioned on an interior surface of the valve port plate. The inner spacer/guide pins provide sufficient support to the valve backer plate whereby the valve backer plate can have a reduced thickness and still resist deflection when the valve backer plate is subjected to relatively high pressures from within the valve housing during a combustion cycle within the combustion chamber.

대표청구항 ▼

A flapper check valve comprising: a valve housing having outlet means; a valve backer plate having a plurality of arcuate backer through holes; a valve port plate having a plurality of arcuate port through holes, said valve port plate positioned generally parallel to said valve backer plate and seal

A flapper check valve comprising: a valve housing having outlet means; a valve backer plate having a plurality of arcuate backer through holes; a valve port plate having a plurality of arcuate port through holes, said valve port plate positioned generally parallel to said valve backer plate and sealably secured with respect to said valve housing, in an open position of the flapper check valve said backer through holes in communication with said port through holes; peripheral spacer/hermetic seal means secured between said valve backer plate and said valve port plate, said peripheral spacer/hermetic seal means positioned about a general periphery of said valve backer plate; inner spacer/flapper guide means secured between said valve backer plate and said valve port plate, said inner spacer/flapper guide means and said peripheral spacer/hermetic seal means maintaining a fixed distance between said valve port plate and said valve backer plate, said inner spacer/flapper guide means comprising a plurality of inner spacer/guide pins positioned on an interior surface, relative to said general periphery, of said valve port plate, and said inner spacer/guide pins providing sufficient support to said valve backer plate whereby said valve backer plate can have a reduced thickness and resist deflection when subjected to relatively high pressures from within said valve housing, each said inner spacer/guide pin further comprising a rod having a central portion with a central cross-section area greater than an outer cross-sectional area of an outer portion at each end of said rod, a transition from said central portion to each said outer portion defining a shoulder that maintains said fixed distance between said valve port plate and said valve backer plate, and said rod secured relative to said valve port plate and said valve backer plate; and flapper means freely moveable in a direction generally perpendicular to said valve port plate between said valve backer plate and said valve port plate, said inner spacer/flapper guide means retaining said flapper means in a position such that upon a positive pressure within said valve housing said flapper means abut said valve port plate and closes communication between said backer through holes and said port through holes.