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US 6,782,916 B2Granted
Flapper valve system
AssigneeCase Corporation
InventorsDarrel J. Svendsen, Kenneth Daniels
Life of this patent
Estimating the term…
Abstract
A fuel system for a work vehicle such as a tractor includes a pair of fuel tanks located on either side of the vehicle that are connected by a cross feed fuel line. The fuel line permits fuel to flow from both tanks to a common fuel suction line, which, in turn, feeds the vehicle's engine with fuel. The fuel line includes a check valve that prevents the free flow of fluid through the cross feed line when the vehicle is driven across a slope. The check valve is disposed to prevent liquid fuel from flowing away from a fuel suction line and starving the suction line for fuel.
Claims8
A flapper valve system comprising:
- a flapper valve disposed in a cross-feed line, the flapper valve comprising a polymeric annulus having a width in an axial direction greater than a thickness in a radial direction;
- and a generally planar valve element including an upper portion fixed to the annulus and a lower portion configured to pivot with respect to the annulus, thereby providing a fluid passageway between the annulus and the valve element;
- and
- an annular clamp extending around an outer surface of the cross-feed line and circumferentially clamping the cross-feed line such that the flapper valve is frictionally held in place in the cross-feed line.
1 more element
Dependencies are inferred from the claim text.