Latch assembly

Patent metadata

Field	Value
Publication number	US-9784022-B2
Application number	US-201514938570-A
Country	US
Kind code	B2
Filing date	Nov 11, 2015
Priority date	Oct 19, 2011
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A latch having a fork bolt and a detent lever is provided. The detent lever moves between an engaged position, wherein the detent lever engages the fork bolt and a disengaged position wherein the detent lever is disengaged from the fork bolt. A first spring acts on the detent lever, the first spring has a first biasing position wherein the detent lever is biased into the engaged position and has a second biasing position wherein the detent lever is biased into the disengaged position. The first spring moves between the first biasing position and the second biasing position during unlatching of the latch and the first spring is in the first biasing position during latching of the latch.

First claim

What is claimed is:

1. A method of operating a latch comprising:
rotatably mounting a fork bolt of the latch to a first stud for movement between an open position and a closed position;
rotatably mounting a detent lever of the latch to a second stud for movement between an engaged position and a disengaged position;
engaging the fork bolt with the detent lever when the detent lever is in the engaged position, wherein the fork bolt is retained in the closed position by the detent lever when the detent lever is in the engaged position;
disengaging the detent lever from the fork bolt by moving the detent lever into the disengaged position;
biasing the detent lever into the engaged position with a first spring when the first spring is in a first spring position;
biasing the detent lever into the disengaged position with the first spring when the first spring is in a second spring position, wherein a center axis of the first spring in the first position is offset from the center axis of the first spring when it is in the second spring position, and wherein the center axis is offset from an axis of rotation of the detent lever; and
biasing the fork bolt towards the open position with a second spring.

2. The method of claim 1 , wherein the second spring has a center axis that is proximate to an axis of rotation of the fork bolt.

3. The method of claim 1 , wherein the first spring is a torsion spring.

4. The method of claim 3 , wherein the second spring is a torsion spring.

5. The method of claim 1 , wherein the second spring is a torsion spring.

6. The method of claim 1 , wherein the second spring only has a single biasing position.

7. The method of claim 2 , wherein the second spring only has a single biasing position.

8. The method of claim 1 , wherein the first spring is a torsion spring and the second spring is a torsion spring and the second spring only has a single biasing position.

9. The method of claim 8 , wherein the second spring has a center axis that is proximate to an axis of rotation of the fork bolt.

Assignees

• Dow Ian J
• Inteva Products Llc

Inventors

• Dow Ian J

Classifications

• E05B2015/0493

  Overcenter springs · CPC title

• E05C3/22 Primary

  the bolt being spring controlled · CPC title

• E05B81/15 Primary

  with means preventing the detent to return to its latching position before the bolt has moved to the unlatched position · CPC title

• Y10T292/1059

  Lever · CPC title