US 12,264,607 B1Granted

Filler-cap activated valve in filler-neck oil vent

AssigneePratt & Whitney Canada Corp.

InventorsAhmad Cheikhzen, Victor Sa Melo, Penny Nicolaidis, Daniel Alecu, Michel Labbe

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Abstract

An oil filler assembly, has: a filler tube extending from a bottom end to a top end; a non-return valve having a tube side and a tank side; a cap assembly including a cap removably secured to the filler tube and a dipstick projecting from the cap; a vent having an inlet connected to the tank side and an outlet connected to the tube side, the vent defining a flow path bypassing the non-return valve; and a safety valve connected to the vent and having an open configuration in which fluid flow is permitted and a closed configuration in which fluid flow is prevented, the safety valve being engageable by the cap assembly to bias the safety valve in the open configuration when the cap is secured to the top end, the safety valve being in the closed configuration when the cap assembly is detached from the top end.

Claims20

Dependent claims

An oil filler assembly for an aircraft engine, comprising:

a filler tube extending from a bottom end to a top end;
a non-return valve having a tube side fluidly connected to the filler tube and a tank side fluidly connectable to an oil tank;
a cap assembly including a cap removably secured to the top end of the filler tube, the cap assembly including a dipstick projecting from the cap into the filler tube;
a vent having an inlet fluidly connected to the tank side of the non-return valve and an outlet fluidly connected to the tube side of the non-return valve, the vent defining a flow path bypassing the non-return valve;
and
a safety valve fluidly connected to the vent, the safety valve having an open configuration in which fluid flow through the outlet of the vent is permitted and a closed configuration in which fluid flow through the outlet of the vent is prevented, the safety valve being engageable by the cap assembly to bias the safety valve in the open configuration when the cap is secured to the top end of the filler tube, the safety valve being in the closed configuration when the cap assembly is detached from the top end.

3 more elements

An aircraft engine, comprising:

an oil tank;
a filler tube fluidly connected to the oil tank at a location selected such that an oil level in the filler tube is representative of an oil level in the oil tank;
a non-return valve, the filler tube fluidly connected to the oil tank via the non-return valve;
a cap assembly including a cap removably securable to a top end of the filler tube, the cap assembly including a dipstick projecting from the cap into the filler tube;
a vent fluidly connecting the oil tank to the filler tube along a flow path bypassing the non-return valve;
and
a safety valve fluidly connected to the vent, the safety valve having an open configuration in which fluid communication between the oil tank and the filler tube through the vent is permitted and a closed configuration in which fluid communication between the oil tank and the filler tube through the vent is prevented, the safety valve being engageable by the cap assembly such that the safety valve is in the open configuration when the cap is secured to the top end and in the closed configuration when the cap is detached from the top end of the filler tube.

4 more elements

Dependencies are inferred from the claim text.