Opening system for a door

Patent metadata

Field	Value
Publication number	US-12031367-B2
Application number	US-202217667394-A
Country	US
Kind code	B2
Filing date	Feb 8, 2022
Priority date	Mar 29, 2021
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

An opening system for a cowling access door, to a cowling access door with such an opening system for a cowling of an aircraft, to an aircraft comprising such a cowling access door, and to a method of operating such an opening system. The opening system may include an overcentering latch that automatically latches in the over-centered state to prevent the cowling access door from returning to the closed position, and a release system that is coupled to the overcentering latch and adapted for transitioning the overcentering latch from the over-centered state to an unclamped state. The opening system further includes a remote actuator that is located spaced apart from the release system and adapted for remotely actuating the release system.

First claim

What is claimed is:

1. An opening system for a cowling access door of a cowling, the cowling access door being movable between a closed position and an opened position, comprising:
a hinge bracket that is adapted for pivotally attaching the cowling access door to the cowling;
a cowling access door holder, comprising:
an overcentering latch that is in an unclamped state when the cowling access door is in the closed position and movable from the unclamped state to an over-centered state when the cowling access door is moved from the closed position to the opened position, wherein the overcentering latch automatically latches in the over-centered state to prevent the cowling access door from returning to the closed position,
a release system that is coupled to the overcentering latch and adapted for transitioning the overcentering latch from the over-centered state to the unclamped state and

a remote actuator that is located spaced apart from the release system on the cowling access door and adapted for remotely actuating the release system;
wherein the overcentering latch further comprises:
a first rod having a first end and a second end, wherein the first end is adapted for being pivotally attached to the cowling; and
a second rod having a third end and a fourth end, wherein the third end is pivotally attached to the second end of the first rod;

wherein the release system further comprises:
a release lever that is pivotally attached to the hinge bracket at a release lever attachment point and coupled to the fourth end of the second rod.

2. The opening system of claim 1 wherein the release lever rotates around the release lever attachment point in response to a pull on the release lever, thereby moving the second rod from an over-centered position in which the overcentering latch is in the over-centered state to an unclamped position in which the overcentering latch is in the unclamped state.

3. The opening system of claim 1 wherein the release lever attachment point and the fourth end of the second rod coincide.

4. The opening system of claim 1 wherein the release lever attachment point and the fourth end of the second rod are separated.

5. The opening system of claim 1 further comprising:
a Bowden cable that connects the remote actuator with the release system.

6. The opening system of claim 5 wherein the release system further comprises:
a cable guide that is attached to the hinge bracket and guides the Bowden cable at least partially along the hinge bracket to the release system.

7. The opening system of claim 5 wherein the remote actuator pulls on the Bowden cable upon actuation.

8. The opening system of claim 7 wherein the remote actuator further comprises:
a thumb lever that is adapted for being pivotally attached to the cowling access door and for pulling on the Bowden cable upon actuation.

9. A cowling access door for a cowling of an aircraft comprising the opening system of claim 1 .

10. An aircraft comprising the cowling access door of claim 9 .

11. A method of operating the opening system of claim 1 comprising:
with the hinge bracket, moving the overcentering latch from an unclamped state in which the cowling access door is in the closed position to an over-centered state in which the cowling access door is in the opened position; and
with the overcentering latch, automatically latching in the over-centered state to prevent the cowling access door from returning to the closed position.

12. The method of claim 11 further comprising:
with the remote actuator, remotely actuating the release system.

13. The method of claim 12 further comprising:
in response to being actuated by the remote actuator, using the release system for transitioning the overcentering latch from the over-centered state to the unclamped state.

14. An opening system for a cowling access door of a cowling, the cowling access door movable between a closed position and an opened position, comprising:
a hinge bracket pivotally attaching the cowling access door to the cowling;
a cowling access door holder comprising:
an overcentering latch that is in an unclamped state when the cowling access door is in the closed position and movable from the unclamped state to an over-centered state when the cowling access door is moved from the closed position to the opened position, wherein the overcentering latch automatically latches in the over-centered state to prevent the cowling access door from returning to the closed position;
a release coupled to the overcentering latch and adapted for transitioning the overcentering latch from the over-centered state to the unclamped state;

a remote actuator spaced apart from the release on the cowling access door and adapted for remotely actuating the release; and
a Bowden cable that connects the remote actuator with the release;
wherein the release further comprises a cable guide attached to the hinge bracket to guide the Bowden cable at least partially along the hinge bracket to the release.

15. The opening system of claim 14 wherein the overcentering latch further comprises:
a first rod having a first end and a second end, wherein the first end is pivotally attached to the cowling; and
a second rod having a third end and a fourth end, wherein the third end is pivotally attached to the second end of the first rod.

16. The opening system of claim 14 wherein the release further comprises:
a release lever pivotally attached to the hinge bracket.

17. The opening system of claim 16 wherein the release lever is pivotally attached to the hinge bracket at a release lever attachment point and coupled to the fourth end of the second rod.

18. An opening system for a cowling access door of a cowling, the cowling access door movable between a closed position and an opened position, comprising:
a hinge bracket pivotally attaching the cowling access door to the cowling;
a cowling access door holder, comprising:
an overcentering latch that is in an unclamped state when the cowling access door is in the closed position and movable from the unclamped state to an over-centered state when the cowling access door is moved from the closed position to the opened position, wherein the overcentering latch automatically latches in the over-centered state to prevent the cowling access door from returning to the closed position,
a release coupled to the overcentering latch and adapted for transitioning the overcentering latch from the over-centered state to the unclamped state, the release having a lever pivotally attached to the hinge bracket and

a remote actuator that is located spaced apart from the release on the cowling access door and adapted for remotely actuating the release system.

Assignees

• Airbus Helicopters Deutschland GmbH

Inventors

• Klassen Viktor
• Hommel Johannes
• Testa Sebastien

Classifications

• E05D5/0207

  for attachment to vehicles (E05D5/043, E05D5/062 take precedence) · CPC title

• E05D3/02

  with one pin · CPC title

• B64D29/08

  Inspection panels for power plants · CPC title

• B64D29/06 Primary

  Attaching of nacelles, fairings or cowlings · CPC title

• B64C1/1446

  Inspection hatches (for engine cowls B64D29/08) · CPC title