Landing gear assembly

Patent metadata

Field	Value
Publication number	US-9688390-B2
Application number	US-201314428083-A
Country	US
Kind code	B2
Filing date	Sep 10, 2013
Priority date	Sep 17, 2012
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A landing gear assembly 10 having first and second parts 12 b, 14 b movably mounted with respect to one another. The landing gear assembly includes a critical space 32 . A spring assembly 26 is arranged to bias the first and second parts to move relative to one another. A spring support 30 is provided to inhibit a broken portion of the spring assembly entering or contacting the critical space following a spring failure.

First claim

The invention claimed is:

1. A landing gear assembly comprising:
a first part;
a second part movably coupled to the first part so as to be reversibly movable between first and second conditions;
a space between the first part and the second part;
a spring assembly arranged to bias the first part to move relative to the second part, the spring assembly comprising:
a spring; and
a first anchor element coupled to the spring and movably coupled to the first part of the landing gear assembly at a first anchor point; and

a spring support coupled to the spring assembly, the spring support having a free end sized to bridge the space between the first part and the second part in the event of a spring failure;
wherein the spring support is anchored to the first anchor element at a location spaced from the free end in a cantilevered manner.

2. A landing gear assembly according to claim 1 , wherein the spring support is arranged to be externally coupled to the spring assembly.

3. A landing gear assembly according to claim 1 , wherein the spring support is formed of a lightweight material.

4. A landing gear assembly according to claim 1 , wherein the spring support is attached to the first anchor element.

5. A landing gear assembly according to claim 1 , wherein the spring support is arranged to contact the second part so as to bridge the space between the first part and the second part in the event of a spring failure.

6. A landing gear assembly according to claim 1 , wherein each spring assembly comprises;
a second anchor element attached to the spring and coupled to a part of the landing gear assembly other than the first part of the landing gear assembly.

7. A landing gear assembly according to claim 6 , wherein the second anchor element is coupled to the second part of the landing gear assembly.

8. A landing gear assembly according to claim 1 , wherein the first anchor element comprises an elongate arm, a first end of which is movably coupled to the first part of the landing gear assembly and a second end of which defines an engagement potion arranged to engage with the spring, wherein the spring support is attached to the elongate arm between the first end and the engagement portion.

9. A landing gear assembly according to claim 1 , wherein the first part of the landing gear assembly comprises an arm of a stay.

10. A landing gear assembly according to claim 1 , wherein the second part of the landing gear assembly comprises an arm of a lock link.

11. A landing gear assembly comprising:
a first part;
a second part movably coupled to the first part so as to be reversibly movable between first and second conditions;
a space between the first part and the second part;
a spring assembly arranged to bias the first part to move relative to the second part, the spring assembly comprising:
a spring; and
a first anchor element coupled to the spring and movably coupled to the first part of the landing gear assembly at a first anchor point; and

a spring support coupled to the spring assembly, the spring support having a free end sized to bridge the space between the first part and the second part in the event of a spring failure;
wherein the landing gear assembly comprises two spring assemblies arranged in a side by side configuration and two spring supports.

12. A landing gear assembly according to claim 1 , wherein the spring support is arranged to be removably coupled to the spring assembly.

13. An aircraft including one or more landing gear assemblies according to claim 1 .

14. The landing gear assembly of claim 1 , wherein the space between the first part and the second part comprises an opening between the first part and the second part which varies in size as the second part moves relative to the first part between the first and second conditions.

15. A landing gear assembly according to claim 14 , wherein the first part of the landing gear assembly comprises an arm of a stay.

16. A landing gear assembly according to claim 14 , wherein the second part of the landing gear assembly comprises an arm of a lock link.

17. A landing gear assembly according to claim 14 , wherein the spring support is mounted externally with respect to the spring assembly.

18. A landing gear assembly according to claim 11 , wherein the spring support is arranged to be externally coupled to the spring assembly.

19. A landing gear assembly comprising:
a first part;
a second part movably coupled to the first part so as to be reversibly movable between first and second conditions;
a space between the first part and the second part;
a spring assembly arranged to bias the first part to move relative to the second part, the spring assembly comprising:
a spring; and
a first anchor element coupled to the spring and movably coupled to the first part of the landing gear assembly at a first anchor point; and

a spring support coupled to the spring assembly, the spring support having a free end sized to bridge the space between the first part and the second part in the event of a spring failure;
wherein the spring support extends along a side of the spring.

20. A landing gear assembly according to claim 19 , wherein the spring support is arranged to be externally coupled to the spring assembly.

Assignees

• Messier-Dowty Ltd
• Safran Landing Systems Uk Ltd

Inventors

• Empson Paul
• Paddock Andrew
• Green Christopher

Classifications

• B64C25/26 Primary

  Control or locking systems therefor · CPC title

• B64C25/58

  Arrangements or adaptations of shock-absorbers or springs (shimmy-dampers B64C25/50) · CPC title

• B64C25/20 Primary

  mechanical · CPC title

• B64C25/30

  emergency actuated · CPC title