Stationary actuator device for controlling the pitch of fan blades of a turboprop
US-9284041-B2 · Mar 15, 2016 · US
Bistable pitch propeller system with bidirectional propeller rotation
US11702188B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11702188-B2 |
| Application number | US-202217574383-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 12, 2022 |
| Priority date | Aug 1, 2016 |
| Publication date | Jul 18, 2023 |
| Grant date | Jul 18, 2023 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
A propeller includes a blade free to rotate. A first stop is positioned to mechanically engage one or both of a first portion of the blade and a first structure coupled to the blade when the blade is in a first position at a first end of the rotational range of motion. A second stop is positioned to mechanically engage one or both of a second portion of the blade and a second structure coupled to the blade when the blade is in a second position at a second end of the defined rotational range. The blade rotates to the first position against the first stop when the propeller is rotated in a first direction and to the second position against the second stop when the propeller is rotated in a second direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A propeller, comprising: a blade free to rotate about a longitudinal axis of the blade within at least a defined rotational range of motion; a first mechanical stop positioned to engage mechanically one or both of a first portion of the blade and a first structure coupled mechanically to the blade when the blade is in a first position at a first end of the defined rotational range of motion, wherein the first position is associated with hovering; and a second mechanical stop positioned to engage mechanically one or both of a second portion of the blade and a second structure coupled mechanically to the blade when the blade is in a second position at a second end of the defined rotational range of motion, wherein the second position is associated with forward flight; wherein: the blade rotates to the first position against the first mechanical stop when the propeller is rotated in a first direction and the blade rotates to the second position against the second mechanical stop when the propeller is rotated in a second direction; the first portion of the blade includes a first side of the blade and the second portion of the blade includes a second side of the blade; the first mechanical stop includes a first blade stopper configured to directly contact and mechanically stop the first side of the blade when the blade is in the first position; the second mechanical stop includes a second blade stopper configured to directly contact and mechanically stop the second side of the blade when the blade is in the second position; and a position of the first blade stopper is adjustable. 2. The propeller of claim 1 wherein the first structure is the same as the second structure. 3. The propeller of claim 1 wherein: the first structure and the second structure are a same rotatable bearing; a peg is connected to the rotatable bearing; the first mechanical stop includes a first peg stopper configured to mechanically stop the peg when the blade is in the first position; and the second mechanical stop includes a second peg stopper configured to mechanically stop the peg when the blade is in the second position. 4. The propeller of claim 1 wherein: the first structure and the second structure are a same rotatable bearing; a peg is connected to the rotatable bearing; the first mechanical stop includes a first peg stopper configured to mechanically stop the peg when the blade is in the first position; the second mechanical stop includes a second peg stopper configured to mechanically stop the peg when the blade is in the second position; and a position of the first peg stopper is adjustable.
Assignees
Inventors
Classifications
with two or more rotors · CPC title
Rotors; Rotor supports · CPC title
- B64C11/325Primary
comprising feathering, braking or stopping systems · CPC title
Aerodynamic features · CPC title
actuated by the centrifugal force or the aerodynamic drag acting on the blades · CPC title
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Frequently asked questions
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- What does patent US11702188B2 cover?
- A propeller includes a blade free to rotate. A first stop is positioned to mechanically engage one or both of a first portion of the blade and a first structure coupled to the blade when the blade is in a first position at a first end of the rotational range of motion. A second stop is positioned to mechanically engage one or both of a second portion of the blade and a second structure coupled …
- Who is the assignee on this patent?
- Kitty Hawk Corp
- What technology area does this patent fall under?
- Primary CPC classification B64C11/325. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jul 18 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).