US 11,773,991 B2
Fuel demand valve with anti-siphon and pressure protection
Sean Whelan, Highland, MI (US)
Assigned to BIG DOG MARINE LLC, Highland, MI (US)
Filed by BIG DOG MARINE LLC, Highland, MI (US)
Filed on Oct. 26, 2022, as Appl. No. 17/974,219.
Claims priority of provisional application 63/272,469, filed on Oct. 27, 2021.
Prior Publication US 2023/0128683 A1, Apr. 27, 2023
Int. Cl. F16K 15/02 (2006.01); F16K 27/02 (2006.01); F02M 37/00 (2006.01)
CPC F16K 15/028 (2013.01) [F02M 37/0011 (2013.01); F16K 27/0209 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for controlling fuel flow, comprising:
an inlet housing with an inlet tunnel and a shelf on one side and an opening to receive fuel on another side;
an outlet housing comprising:
a widened portion defining a housing chamber and configured to align with the shelf of the inlet housing; and
a line portion configured to mate with an engine fuel line;
a valve door with a flat side and an opposite side disposed within the housing chamber with a valve door perimeter;
a large gasket disposed between the shelf and the valve door with a large gasket inner perimeter and a large gasket outer perimeter, wherein the large gasket outer perimeter is equal to or less than the valve door perimeter;
a small gasket disposed between the shelf and the valve door with a small gasket outer perimeter that is less than the large gasket inner perimeter and a small gasket inner perimeter that equal to a perimeter of the inlet tunnel; and
a spring disposed between the opposite side of the valve door and the line portion of the outlet housing.