Valve apparatus

Details Valve apparatus Valve apparatus

2007-12-25

2007-12-25

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S512150, C137S856000, C137S315330

Reexamination Certificate

active

11291986

ABSTRACT:
A valve apparatus is small, and regulates a fuel amount by restricting a lift amount of a valve. A columnar portion is formed on a pump body. The columnar portion is inserted into a check valve and a washer formed with a protruding portion which protrudes outward from a flange portion, and the check valve and washer are attached or fixed to the pump body by subjecting a tip end of the columnar portion to thermal caulking or the like. An outer diameter of the protruding portion is set to be relatively smaller than an outer diameter of the flange portion such that when the check valve is sandwiched between the protruding portion and pump body, the check valve contacts an outer peripheral edge of the flange portion when the check valve opens. As a result, a lift amount of the valve can be restricted, and a flow rate of fuel passing through a passage can be maintained at a constant level.

REFERENCES:
patent: 4218407 (1980-08-01), Robertson
patent: 5014739 (1991-05-01), Csaszar
patent: 5601112 (1997-02-01), Sekiya et al.
patent: 6579074 (2003-06-01), Chiba

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