Methods and apparatus to recover rotorcraft

Patent metadata

Field	Value
Publication number	US-11718389-B2
Application number	US-202217834439-A
Country	US
Kind code	B2
Filing date	Jun 7, 2022
Priority date	Oct 2, 2018
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

Methods and apparatus to recover rotorcraft are disclosed. A disclosed example apparatus includes a rotor of a vehicle, a rotatable hub to support the rotor, and a rotor hook disposed on the rotor. The rotor hook has a groove to receive a recovery line. The rotor is to contact the recovery line when the vehicle is flown toward the recovery line.

First claim

What is claimed is:

1. A method of recovering an aircraft, the method comprising:
moving the aircraft toward a suspended recovery line;
contacting a portion of a rotor of the aircraft with the recovery line; and
drawing the recovery line to a rotor hook based on a rotation of the rotor, the rotor hook positioned on a rotatable hub, the rotatable hub configured to support and rotate the rotor.

2. The method as defined in claim 1 , further including restricting, via a lock, the recovery line to the rotor hook.

3. The method as defined in claim 2 , wherein restricting the recovery line includes rotating a pivoting lever to constrain the recovery line in a groove of the rotor hook.

4. The method as defined in claim 1 , wherein the portion of the rotor includes a distal portion of the rotor.

5. The method as defined in claim 1 , wherein drawing the recovery line to the rotor hook includes moving the recovery line toward the rotatable hub.

6. The method as defined in claim 1 , wherein drawing the recovery line to the rotor hook includes drawing the recovery line to a groove of the rotor hook.

7. The method as defined in claim 1 , wherein contacting the portion of the rotor of the aircraft with the recovery line includes causing a distal end of the rotor to contact the recovery line.

8. The method as defined in claim 1 , further including unwinding the aircraft from the recovery line.

9. The method as defined in claim 1 , wherein drawing the recovery line to the rotor hook includes suspending the aircraft with the recovery line.

10. The method as defined in claim 1 , wherein drawing the recovery line to the rotor hook causes the recovery line to wrap around the aircraft.

11. A method for recovering an aircraft, the method comprising:
moving a rotor of the aircraft towards a recovery line; and
capturing the recovery line in a rotor hook, the rotor hook positioned on a rotatable hub, the rotatable hub configured to support and rotate the rotor.

12. The method as defined in claim 11 , wherein capturing the recovery line in the rotor hook includes capturing the recovery line in a groove of the rotor hook.

13. The method as defined in claim 12 , wherein capturing the recovery line includes rotating a pivoting lever to constrain the recovery line in the groove of the rotor hook.

14. The method as defined in claim 11 , wherein capturing the recovery line in the rotor hook includes restraining the recovery line to the rotor hook via a lock, the lock coupled to the rotor hook.

15. The method as defined in claim 11 , wherein moving the rotor of the aircraft towards the recovery line includes rotating the rotor, wherein the rotation of the rotor causes at least a portion of the recovery line to be drawn towards the hook.

16. The method as defined in claim 11 , wherein capturing the recovery line in the rotor hook includes moving the recovery line toward the rotatable hub.

17. The method as defined in claim 11 , wherein moving the rotor of the aircraft to the recovery line includes contacting the recovery line at a distal end of the rotor.

18. The method as defined in claim 11 , further including unwinding the aircraft from the recovery line.

19. An aircraft comprising:
a first rotor;
a second rotor; and
a rotatable hub configured to support the first and second rotors, the first and second rotors extending from the rotatable hub such that the first and second rotors have a common axis of rotation, the rotatable hub having a first rotor hook with a first groove, the rotatable hub having a second rotor hook with a second groove,
wherein an opening of the second groove faces a direction opposite an opening of the first groove, and
wherein at least one of the first or second grooves is configured to receive a recovery line when at least one of the first and second rotors contacts the recovery line such that the rotation of the at least one of the first and second rotors causes at least a portion of the recovery line to be drawn toward and captured by at least one of the first or second grooves to recover the aircraft during flight thereof.

20. The aircraft as defined in claim 19 , further including a first lock operatively coupled to the first rotor hook and a second lock operatively coupled to the second rotor hook, the first lock configured to retain the recovery line when the first groove receives the at least the portion of the recovery line and the second lock configured to retain the recovery line when the second groove receives the at least the portion of the recovery line.

Assignees

• Insitu Inc

Inventors

• Lydecker Jeffrey David
• Rysdyk Rolf

Classifications

• B64U30/29

  Constructional aspects of rotors or rotor supports; Arrangements thereof · CPC title

• B64U70/30

  for capturing UAVs in flight by ground or sea-based arresting gear, e.g. by a cable or a net · CPC title

• B64U10/10 Primary

  Rotorcrafts · CPC title

• B64C25/68 Primary

  Arrester hooks · CPC title

• B64C27/32

  Rotors · CPC title