US 12,264,594 B1
Oil filler tube assembly for aircraft engine
Ahmad Cheikhzen, Montreal (CA); Victor Sa Melo, Cambridge (CA); Michel Labbe, Montreal (CA); Penny Nicolaidis, Mont Royal (CA); and Daniel Alecu, Brampton (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. 18/516,209.
Int. Cl. F01D 25/18 (2006.01); F02C 7/16 (2006.01)
CPC F01D 25/183 (2013.01) [F02C 7/16 (2013.01); F05D 2220/323 (2013.01); F05D 2230/72 (2013.01); F05D 2240/58 (2013.01); F05D 2260/608 (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 valve having a tube side fluidly connected to the filler tube and a tank side fluidly connectable to an oil tank;
a cap removably secured to the top end of the filler tube;
a dipstick secured to the cap and extending into the filler tube towards the bottom end; and
a piston secured to the dipstick and sized to be received in the filler tube between the top end and the valve, the piston having:
a sealing configuration in which the piston sealingly engages the filler tube to fluidly disconnect the top end from the valve, the piston being in the sealing configuration when the cap is secured to the top end of the filler tube; and
a venting configuration in which the piston permits fluid communication between the top end and the valve, the piston being in the venting configuration when the cap is moved away from the top end of the filler tube.