US 11,940,042 B2
Gearbox self contained breathing system
Alan W. Falls, Arlington, TX (US); and Charles H. Speller, Oak Point, TX (US)
Assigned to Textron Innovations Inc., Providence, RI (US)
Filed by Textron Innovations Inc., Providence, RI (US)
Filed on Jul. 29, 2022, as Appl. No. 17/877,629.
Prior Publication US 2024/0035558 A1, Feb. 1, 2024
Int. Cl. F16H 57/02 (2012.01); F16H 57/027 (2012.01)
CPC F16H 57/027 (2013.01) 16 Claims
OG exemplary drawing
 
1. A breathing system for a gearbox, comprising:
tubing configured to be fluidly coupled to the gearbox and to allow fluid within the gearbox to pass therethrough; and
a cannister fluidly coupled to the tubing and comprising:
a cavity configured to receive the fluid from the tubing and impermeable to an exterior environment; and
a bladder proximate the cavity and configured to expand and contract as fluid enters and exits the cavity from the gearbox, the bladder comprising an outlet configured to receive air from the exterior environment, wherein the bladder comprises a common edge shared with the cavity, wherein the common edge is flat and the bladder expands and contracts by moving the common edge.