US 12,264,607 B1
Filler-cap activated valve in filler-neck oil vent
Ahmad Cheikhzen, Montreal (CA); Victor Sa Melo, Cambridge (CA); Penny Nicolaidis, Mont Royal (CA); Daniel Alecu, Brampton (CA); and Michel Labbe, Montreal (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Nov. 21, 2023, as Appl. No. 18/516,270.
Int. Cl. F01M 13/00 (2006.01); B64D 27/10 (2006.01); F01M 11/00 (2006.01); F01M 11/04 (2006.01); F01M 11/12 (2006.01)
CPC F01M 13/00 (2013.01) [B64D 27/10 (2013.01); F01M 11/04 (2013.01); F01M 11/12 (2013.01); F01M 11/0004 (2013.01); F01M 2011/0491 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.