# US 11,440,655 B1 · Thrust vectoring control of a cyclorotor

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,440,655 B1
- Document ID: US11440655B1
- Status: Granted
- Kind: B1
- Application number: 17/220,042
- Filed: 2021-04-01
- Granted: 2022-09-13
- Earliest claimed: 2017-12-04
- Assignees: The United States of America as represented by the Secretary of the Air Force
- Applicants: Government of the United States as represented by the Secretary of the Air Force
- Inventors: Zachary H. Adams
- Web page: https://patentgrep.com/patent/US11440655B1

## CPC

- B64B 1/20: provided with wings or stabilising surfaces {(tail unit construction B64B1/10; movable control surfaces B64B1/12)}
- B63G 8/08: Propulsion ({schnorkels B63G8/36;} nuclear propulsion B63H21/18; submerged exhausting apparatus F01N13/12)
- B63H 1/10: of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body
- B64B 1/34: of lifting propellers
- B64C 39/005: {about a horizontal transversal axis}
- F03D 3/068: {mechanically controlled by the rotor structure}
- F03D 7/06: the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
- F05B 2240/211: with vertical axis
- F05B 2240/214: of the Musgrove or "H"-type
- F05B 2240/60: Shafts
- F05B 2240/91: on a stationary structure
- F05B 2260/506: using cams or eccentrics
- B64B: LIGHTER-THAN AIR AIRCRAFT
- B63G: OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS (means of attack or defence in general, e.g. turrets F41H)
- B63H: MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V1/14; specially adapted for submarines, other than nuclear propulsion, B63G; specially adapted for torpedoes F42B19/00)
- B64C: AEROPLANES; HELICOPTERS
- F03D: WIND MOTORS
- F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G

## Abstract

A device for controlling thrust vectoring of a cyclorotor includes a control cam positionable relative to a drive shaft of a cyclorotor along each of a first axis and a second axis, where the drive shaft is rotatable about a third axis. The device may further include a frame having a plurality of sides, where the frame is disposed at least partly around the drive shaft of the cyclorotor, a first positioning assembly disposed on a first side of the frame, where the first positioning assembly is structurally configured to move the frame along the first axis, and a second positioning assembly disposed on a second side of the frame, where the second positioning assembly is engaged with the control cam and structurally configured to move the control cam relative to the frame along the second axis.

## Claims

### Claim 1

A method for controlling thrust vectoring of a cyclorotor, comprising:
positioning a frame along a first axis, the frame having a plurality of sides disposed at least partly around a drive shaft of a cyclorotor, where the frame is engaged with a control cam such that movement of the frame along the first axis simultaneously moves the control cam along the first axis;
controlling a first positioning assembly for positioning the frame relative to a first axis;
controlling a second positioning assembly for positioning the control cam relative to the frame along a second axis;
controlling a third positioning assembly for positioning the frame relative to the first axis;
controlling a fourth positioning assembly for positioning the control cam relative to the frame along the second axis;
wherein the first and third positioning assemblies movably connect the frame to a shaft housing surrounding the drive shaft;
wherein the second and fourth positioning assemblies movably connect the frame to the control cam; and
where positioning of the control cam alters a pitch of one or more of a plurality of blades of the cyclorotor.

### Claim 2 (depends on 1)

The method of claim 1, further comprising positioning the control cam relative to the drive shaft along a third axis about which the drive shaft is rotatable, where the first axis and the second axis are substantially perpendicular to the third axis.

### Claim 3 (depends on 2)

The method of claim 2, where the control cam comprises an inner surface that is contoured, where movement of the control cam relative to the drive shaft along one or more of the first axis and the second axis causes thrust vectoring of the cyclorotor, and where movement of the control cam relative to the drive shaft along the third axis shifts blade pitching to account for changes in forward velocity of the cyclorotor.

### Claim 4 (depends on 1)

The method of claim 1, further comprising rotating the control cam about a third axis about which the drive shaft is rotatable.

### Claim 5 (depends on 4)

The method of claim 4, where rotating the control cam adjusts an angle of travel for an overall freestream flow through the cyclorotor.

### Claim 6 (depends on 1)

The method of claim 1, further comprising positioning the frame along a third axis about which the drive shaft is rotatable.

### Claim 7 (depends on 1)

The method of claim 1, further comprising operating one or more servo valves for controlling hydraulic fluid provided to one or more cylinders included on one or more of the first positioning assembly and the second positioning assembly.

### Claim 8 (depends on 1)

The method of claim 1, further comprising providing a controller having a processor and a memory, wherein the processor reads an output of a position sensor indicating a relative position of the frame and the control cam, and wherein the controller adjusts the relative position of the frame and the control cam based on the output of the position sensor to provide a predetermined thrust vectoring for the cyclorotor.