Inlet orifice for a fuel pressure damper

Details Inlet orifice for a fuel pressure damper Inlet orifice for a fuel pressure damper

2011-01-18

2011-01-18

Brinson, Patrick F (Department: 3754)

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

C138S031000, C138S026000, C220S721000, C303S087000

Reexamination Certificate

active

07870871

ABSTRACT:
A fuel pressure damper (10′) includes a housing (15) defining an inlet (46) constructed and arranged to receive fuel. An orifice disc (54) is provided at the inlet and includes at least one orifice (58). A cover (22) is coupled to the housing. A flexible diaphragm (12) has a periphery fixedly secured to at least the housing or the cover and has a freely movable central portion (36). A compression spring (14) biases the diaphragm to a normal position. In an operating position, the central portion of the diaphragm alone, or in combination with the spring, is constructed and arranged to dampen fuel pressure pulsations at the inlet. The orifice is constructed and arranged to ensure that pressure pulsations of a certain magnitude are prevented from entering the damper and damaging the diaphragm.

REFERENCES:
patent: 4281679 (1981-08-01), Stearns
patent: 5058961 (1991-10-01), Mergenthaler et al.
patent: 5265943 (1993-11-01), Kehl et al.
patent: 5618085 (1997-04-01), Siegel et al.
patent: 5664848 (1997-09-01), Muraski
patent: 5857753 (1999-01-01), Gowda
patent: 5951121 (1999-09-01), Takahashi
patent: 6003555 (1999-12-01), Sheng
patent: 6203117 (2001-03-01), Starr et al.
patent: 6390133 (2002-05-01), Patterson et al.

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