Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2005-12-27
2005-12-27
Rivell, John (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C137S538000, C137S592000, C251S357000
Reexamination Certificate
active
06978801
ABSTRACT:
A backflow prevention valve includes a cylindrical case member with an inflow opening at one end and an outlet at the other end or a peripheral surface or both, and a valve member contacting a peripheral edge of the inflow opening for closing the inflow opening. An urging device urges the valve member toward the inflow opening, and a liquid inflow pipe is connected to the inflow opening from outside the case member. The liquid inflow pipe has a smooth inner surface without unevenness, and is attached to a fuel supply pipe inside the fuel tank. When the fuel is supplied, the valve member moves against an urging force of the urging device due to a fuel pressure, so that the inflow opening opens.
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Kanesaka Manabu
NIFCO Inc.
Rivell John
LandOfFree
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