Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1989-12-22
1991-02-19
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
137847, 137850, F16K 1516
Patent
active
049934520
ABSTRACT:
An exhaust gas aftertreatment system having an air supply system is disclosed and includes an air feeding pump for selectively creating a flow of air through a flow passage which directs the flow of air to a regeneration system. A check valve is provided including a valve element having a circular base portion surrounding and supported by the flow passage, a flexing portion extending from the circular base portion and converging to form a diametrically extending tip, and a diametrical slit formed in the tip. Also, a support structure is positioned to extend into the valve element to a position adjacent the tip for supporting the flexing portion such that the valve element permits the flow of air from the air feeding pump in one direction and prevents the flow of exhaust gas in an opposite direction with the support structure preventing the valve element from collapsing when the air feeding pump is inoperable.
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Cummins Engine Company, Inc.
Nilson Robert G.
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