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US 8,262,358 B1Granted
Ultra-light weight self-lubricating propeller hub
AssigneeThe Boeing Company
InventorsNeal W. Muylaert, Lyndon C. Lamborn
Life of this patent
Estimating the term…
Abstract
A propeller assembly includes a rotatable hub having a center metal hub portion and an outer composite hub portion. A set of composite propeller blades are mounted for pitch control rotation on the hub by a set of dry bearings.
Claims24
A propeller, comprising:
- a rotatable hub including a center hub portion and a hollow outer hub portion connected to the center hub portion;
- a set of propeller blades said blades;
- and
- a set of dry bearings for mounting each of the propeller blades on the center and outer hub portions for blade pitch rotation, said set comprising a first cylindrically shaped dry bearing supporting an inboard portion of a root end of the blade inside the center hub portion and a second cylindrically shaped dry bearing supporting an outboard portion of the root end of the blade inside an outer hub portion.
1 more element
An airplane propeller assembly, comprising:
- a propeller including a plurality of propeller blades;
- a rotatable hub including a center hub portion and a hollow outer composite hub portion surrounding and mounted on the center hub portion;
- and,
- means for mounting a first section of each of the blades on the center hub portion and for mounting a second section of each of the blades on the outer hub portion, said means comprising a first cylindrically shaped dry bearing supporting an inboard portion of a root end of the blade inside the center hub portion and a second cylindrically shaped dry bearing supporting an outboard portion of the root end of the blade inside an outer hub portion.
1 more element
An airplane propeller having blade pitch control, comprising:
- a propeller including a plurality of propeller blades;
- a rotatable hub including a center hub portion and a hollow outer composite hub portion surrounding and mounted on the center hub portion, said outer hub including an outer section forming an aerodynamic fairing;
- and
- means for mounting the blades for pitch rotation on the hub, said means comprising a first cylindrically shaped dry bearing supporting an inboard portion of a root end of the blade inside the center hub portion and a second cylindrically shaped dry bearing supporting an outboard portion of the root end of the blade inside the outer hub portion.
1 more element
Dependencies are inferred from the claim text.