Apparatuses, systems, and methods for latching objects

Patent metadata

Field	Value
Publication number	US-11326370-B2
Application number	US-201916427110-A
Country	US
Kind code	B2
Filing date	May 30, 2019
Priority date	May 30, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

In one embodiment, a system includes a first object, a second object, and a latch. The latch includes a worm gear, a spur gear, and a lever arm. The spur gear rotates in response to rotating the worm gear. The lever arm rotates in response to rotating the spur gear. The first object latches to the second object in response to rotating the lever arm.

First claim

What is claimed is:

1. A system, comprising:
a first object;
a second object; and
a latch, the latch comprising:
a worm gear;
a spur gear operable to rotate in response to rotating the worm gear; and
a lever arm operable to rotate in response to rotating the spur gear;

wherein:
the first object is operable to latch to the second object in response to rotating the lever arm;
an end of the worm gear is recessed from an outer surface of the first object when the first object is not latched to the second object, thereby providing a visual indication that the first object is not latched to the second object; and
the end of the worm gear is flush with the outer surface of the first object when the first object is latched to the second object, thereby providing a visual indication that the first object is latched to the second object.

2. The system of claim 1 , further comprising a contact device, wherein:
the contact device comprises a contact pad and a spherical ball;
the spherical ball is located within an opening in the lever arm;
the spherical ball is operable to rotate within the opening of the lever arm; and
the contact pad is operable to contact a surface of the second object.

3. The system of claim 1 , wherein the spur gear comprises a key that is inserted into the lever arm such that the spur gear and the lever arm move together.

4. The system of claim 1 , further comprising:
a housing that surrounds the worm gear and the spur gear;
a retainer located around a first portion of the worm gear; and
a wave spring located around a second portion of the worm gear;
wherein:
the wave spring is located between the retainer and a threaded shaft of the worm gear; and
the wave spring is operable to expand and push the worm gear away from the first object and toward an inner surface of the housing.

5. The system of claim 4 , further comprising a nut fastened to a portion of the worm gear, wherein:
the nut is adjusted based on a thickness of the second object; and
the nut contacts an exterior surface of the housing when the first object is latched to the second object.

6. The system of claim 1 , wherein:
the first object is a mounting panel; and
the second object is an access panel.

7. The system of claim 1 , wherein:
the worm gear is restricted from rotational movement in response to rotation of the spur gear; and
the worm gear is operable to move axially in response to the rotation of the spur gear.

8. An apparatus, comprising:
a worm gear;
a spur gear operable to rotate in response to rotating the worm gear; and
a lever arm operable to rotate in response to rotating the spur gear;
wherein:
a mounting panel is operable to latch to an access panel in response to rotating the lever arm;
an end of the worm gear is recessed from an outer surface of the mounting panel when the mounting panel is not latched to the access panel; and
the end of the worm gear is flush with the outer surface of the mounting panel when the mounting panel is latched to the access panel.

9. The apparatus of claim 8 , further comprising a contact device, wherein:
the contact device comprises a contact pad and a spherical ball;
the spherical ball is located within an opening in the lever arm;
the spherical ball is operable to rotate within the opening of the lever arm; and
the contact pad is operable to contact a surface of the second object.

10. The apparatus of claim 8 , wherein the spur gear comprises a key that is inserted into the lever arm such that the spur gear and the lever arm move together.

11. The apparatus of claim 8 , further comprising:
a housing that surrounds the worm gear and the spur gear;
a retainer located around a first portion of the worm gear; and
a wave spring located around a second portion of the worm gear;
wherein:
the wave spring is located between the retainer and a threaded shaft of the worm gear; and
the wave spring is operable to expand and push the worm gear away from the first object and toward an inner surface of the housing.

12. The apparatus of claim 11 , further comprising a nut fastened to a portion of the worm gear, wherein:
the nut is adjusted based on a thickness of the second object; and
the nut contacts an exterior surface of the housing when the first object is latched to the second object.

13. The apparatus of claim 8 , wherein:
the worm gear is restricted from rotational movement in response to rotation of the spur gear; and
the worm gear is operable to move axially in response to the rotation of the spur gear.

14. A method, comprising:
rotating a worm gear of a latch;
rotating a spur gear of the latch in response to rotating the worm gear;
rotating a lever arm of the latch in response to rotating the spur gear; and
latching a first object to a second object in response to rotating the lever arm;
wherein:
an end of the worm gear is recessed from an outer surface of the first object when the first object is not latched to the second object, thereby providing a visual indication that the first object is not latched to the second object; and
the end of the worm gear is flush with the outer surface of the first object when the first object is latched to the second object, thereby providing a visual indication that the first object is latched to the second object.

15. The method of claim 14 , wherein:
the latch comprises a contact device;
the contact device comprises a contact pad and a spherical ball;
the spherical ball is located within an opening in the lever arm;
the spherical ball rotates within the opening of the lever arm; and
the contact pad contacts a surface of the second object.

16. The method of claim 14 , wherein:
a housing surrounds the worm gear and the spur gear;
a retainer of the latch is located around a first portion of the worm gear; and
a wave spring of the latch is located around a second portion of the worm gear;
the wave spring is located between the retainer and a threaded shaft of the worm gear; and
the wave spring expands and pushes the worm gear away from the first object and toward an inner surface of the housing.

17. The method of claim 16 , wherein:
a nut is fastened to a portion of the worm gear;
the nut is adjusted based on a thickness of the second object; and
the nut contacts an exterior surface of the housing when the first object is latched to the second object.

18. The method of claim 14 , wherein:
the first object is a mounting panel; and
the second object is an access panel.

Assignees

• Lockheed Corp

Inventors

• Weidner Brittany Michelle
• Vitztum Pat G

Classifications

• B64C1/14

  Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens {accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers}(fairings movable in conjunction with undercarriage elements B64C25/16; bomb doors B64D1/06) · CPC title

• E05B63/006 Primary

  for different door thicknesses (E05B9/045 takes precedence; for fastening handles to lock or latch parts E05B3/00) · CPC title

• E05Y2900/502

  for aircraft or spacecraft · CPC title

• E05B41/00

  Locks with visible indication as to whether the lock is locked or unlocked {(indicator lights E05B17/10)} · CPC title

• E05C3/06 Primary

  with operating handle or equivalent member moving otherwise than rigidly with the bolt · CPC title