Fuel injector needle check valve biasing spring

Details Fuel injector needle check valve biasing spring Fuel injector needle check valve biasing spring

1994-09-21

1996-05-28

Merritt, Karen B.

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

F02M 6120

Patent

active

055203388

ABSTRACT:
A pair of C-shaped springs adapted for biasing a needle check valve of a fuel injector toward a closed position. The springs are capable of providing a valve opening pressure several times larger than that provided by conventional helical springs, while occupying roughly the same amount of space as prior art biasing springs. Preferably, the individual C-shaped biasing springs include semi-circular indentations in their upper and lower end edges so that the biasing springs abut against each other and substantially surround the shaft of the needle stop for the check valve.

REFERENCES:
patent: 1690893 (1928-11-01), Dorner
patent: 2214459 (1940-09-01), Gottlieb
patent: 2406746 (1946-09-01), David
patent: 3131709 (1964-05-01), Richards
patent: 3175771 (1965-03-01), Breting
patent: 3301492 (1967-01-01), Kingsley
patent: 3627209 (1971-12-01), Scott
patent: 4156391 (1979-05-01), Ubezio
patent: 5183209 (1993-02-01), Ricco et al.

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