Parachute, safety device, and flight vehicle provided with safety device

Patent metadata

Field	Value
Publication number	US-12371175-B2
Application number	US-202318726973-A
Country	US
Kind code	B2
Filing date	Jan 11, 2023
Priority date	Jan 21, 2022
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A parachute that can be deployed more quickly than before, a safety device provided with the parachute, and a flight vehicle provided with the safety device. An umbrella body of the parachute has a substantially hemispherical shape including a first impact buffer, a second impact buffer, and a shape holder, and includes a vent formed at a top portion and an umbrella edge portion constituting an opening. The first impact buffer and the second impact buffer are formed in a state where each of a plurality of base fabrics is disposed such that a center line L connecting a vertex P and a geometric center position of each of the base fabrics intersects an extending direction of a warp thread and a weft thread of the base fabric.

First claim

The invention claimed is:

1. A parachute comprising:
an umbrella body formed by using a plurality of base fabrics woven by combining a warp thread and a weft thread, the umbrella body including a head top portion and an umbrella edge portion, wherein the umbrella body includes an impact buffer that buffers impact when the parachute is deployed, and a shape holder that holds a deployed shape of the parachute after the parachute is deployed,
the impact buffer is an umbrella-shaped portion from the head top portion of the umbrella body to a midway position between the head top portion and the umbrella edge portion, and is formed by joining sides of the plurality of the base fabrics for the impact buffer having a substantially trapezoidal shape in a circumferential direction and is formed in a state where each of the base fabrics for the impact buffer is disposed such that a center line connecting a vertex of the head top portion and a geometric center position of each of the base fabrics for the impact buffer makes an intersection with an extending direction of the warp thread and the weft thread of each of the base fabrics for the impact buffer,
the shape holder joins sides of the plurality of base fabrics for the shape holder having a substantially trapezoidal shape in a circumferential direction to form the umbrella body from the midway position to the umbrella edge portion, and includes one end portion connected to an edge portion of the impact buffer and has lower elasticity than the impact buffer, and
wherein the shape holder is formed by selecting any one of the warp thread and the weft thread for each of the base fabrics for the shape holder and disposing each of the base fabrics for shape holder such that an extending direction of the selected warp thread or weft thread is parallel to the center line.

2. The parachute according to claim 1 , wherein the impact buffer includes:
a first member that forms an umbrella shape from the head top portion to a midway position of the impact buffer between the head top portion and a connection portion connected to the shape holder; and
a second member including one end portion connected to an edge portion of the first member and forming a portion from the midway position of the impact buffer to the connection portion, and a resin layer is provided on at least one of a front surface and a back surface of the second member.

3. A safety device comprising:
a container including an opening;
an object to be deployed contained in the container; and
an ejection device that is provided in the container and ejects the object to be deployed to an outside of the container,
wherein the object to be deployed is the parachute according to claim 1 .

4. The parachute according to claim 1 , wherein an angle of the intersection where the center line coincides with an extending direction of the warp thread or the weft thread is 0°, an angle of the intersection in the impact buffer is 30° to 60°.

5. A safety device comprising:
a container including an opening;
an object to be deployed contained in the container; and
an ejection device that is provided in the container and ejects the object to be deployed to an outside of the container,
wherein the object to be deployed is the parachute according to claim 4 .

6. The parachute according to claim 1 , wherein the impact buffer includes:
a first member that forms an umbrella shape from the head top portion to a midway position of the impact buffer between the head top portion and a connection portion connected to the shape holder; and
a second member including one end portion connected to an edge portion of the first member and forming a portion from the midway position of the impact buffer to the connection portion, and
a resin layer is provided on at least one of a front surface and a back surface of the second member.

7. The parachute according to claim 6 , wherein an angle of the intersection where the center line coincides with an extending direction of the warp thread or the weft thread is 0°, an angle of the intersection in the impact buffer is 30° to 60°.

8. A safety device comprising:
a container including an opening;
an object to be deployed contained in the container; and
an ejection device that is provided in the container and ejects the object to be deployed to an outside of the container,
wherein the object to be deployed is the parachute according to claim 6 .

9. The parachute according to claim 6 , wherein an area ratio between the first member and the second member is 10 to 30(%):70 to 90(%).

10. The parachute according to claim 9 , wherein an angle of the intersection where the center line coincides with an extending direction of the warp thread or the weft thread is 0°, an angle of the intersection in the impact buffer is 30° to 60°.

11. A safety device comprising:
a container including an opening;
an object to be deployed contained in the container; and
an ejection device that is provided in the container and ejects the object to be deployed to an outside of the container,
wherein the object to be deployed is the parachute according to claim 9 .

12. A safety device comprising:
a container including an opening;
an object to be deployed contained in the container; and
an ejection device that is provided in the container and ejects the object to be deployed to an outside of the container,
wherein the object to be deployed is the parachute according to claim 1 .

13. A flight vehicle comprising:
an airframe;
the safety device according to claim 12 , the safety device being provided in the airframe; and
one or more propulsion mechanisms coupled to the airframe to propel the airframe.

14. The safety device according to claim 12 , wherein the ejection device is a pull-out ejection device that pulls out the parachute connected to another ejection object to an outside of the container by first ejecting the another ejection object and ejects the parachute.

15. The safety device according to claim 14 , wherein a pilot chute having a configuration same as the parachute according to is connected to the parachute, and
the ejection device ejects the pilot chute to pull out the parachute from the container.

16. The safety device according to claim 12 , wherein
the safety device is attachable to a flight vehicle, and further comprises an abnormality detection device capable of detecting an abnormality of the flight vehicle or a surrounding environment, and
the abnormality detection device starts the ejection device in a case of detecting the abnormality.

17. The safety device according to claim 16 , further comprising a flight control unit that stops a propulsion device provided in the flight vehicle in a case where the abnormality detection device detects the abnormality.

18. The safety device according to claim 16 , wherein the ejection device is a pull-out ejection device that pulls out the parachute connected to another ejection object to an outside of the container by first ejecting the another ejection object and ejects the parachute.

Assignees

• Nippon Kayaku Kk

Inventors

• Nakamura Hiroshi
• Nishio kensuke

Classifications

• B64D17/725

  by explosive means · CPC title

• B64D17/54

  automatic · CPC title

• B64D17/20

  variable in area · CPC title

• B64U70/83

  using parachutes, balloons or the like · CPC title

• B64U10/13

  Flying platforms · CPC title