Pressure relief device for a propeller hub
AssigneeUnited Technologies Corporation
InventorsRobert W. Pruden, Paul A. Carvalho
Life of this patent
Estimating the term…
Abstract
A pressure relief device for preventing over pressurization of a propeller hub is disclosed. The pressure relief devices is designed to fit within a ball hole opening in the hub arm of the hub. The pressure relief device includes a housing which sealably interfaces with an inner wall of the ball hole opening and a pressure relief insert which sealably interfaces with the housing. The pressure relief device includes a plurality of fracture tabs which engage an end of the housing exposed to hub cavity pressure. The fracture tabs are designed to break at a design pressure allowing the pressure relief insert to be forced out of the housing thus breaking the seal between the pressure relief insert and housing thereby venting the hub cavity.
Claims14
A pressure relief device for a propeller hub, said propeller hub defining a chamber, and a port for venting the chamber, said pressure relief device comprising:
- a first housing for sealably engaging a wall of the port;
- and
- a pressure relief insert for sealably engaging said first housing to seal the chamber, said pressure relief insert comprising a fracture tab wherein said fracture tab fractures at a pressure to vent the chamber.
A pressure relief system for a propeller hub, the propeller hub including a chamber;
- and a bore arm for mounting a propeller blade therein, the bore arm including a plurality of bearings for facilitating movement of the propeller blade, wherein the bore arm is in fluid communication with the chamber for providing lubricant to the plurality of bearings, the bore arm further including a ball loading hole for removal and installation of the plurality of bearings, said pressure relief system comprising:
- a first housing for sealably engaging a wall of the ball loading hole;
- and
- a pressure relief insert for sealably engaging said first housing to seal the chamber, said pressure relief insert comprising a fracture tab wherein said fracture tab fractures at a pressure to vent the chamber.
Dependencies are inferred from the claim text.