Handgun sear with multiple engagement surfaces

Patent metadata

Field	Value
Publication number	US-10684087-B2
Application number	US-201816156266-A
Country	US
Kind code	B2
Filing date	Oct 10, 2018
Priority date	Oct 10, 2017
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

A handgun sear has a sear body extending between a proximal end portion to a distal end portion. The sear defines a first engagement surface adjacent the proximal end portion and a second engagement surface positioned distally of the first engagement surface. The sear can pivot about the distal end portion between a cocked position and a displaced position. The second engagement surface can be used to arrest forward movement of the striker in the event of an impulse that causes the striker to disengage from the first engagement surface. The sear may be incorporated into a fire control assembly of a semiautomatic handgun or other firearm.

First claim

What is claimed is:

1. A sear for a striker fired handgun; the sear comprising:
a sear body extending between a distal end portion and a proximal end portion, the sear body pivotable about the distal end portion and defining a first engagement surface and a second engagement surface between the first engagement surface and the distal end portion, wherein the first engagement surface and the second engagement surface face proximally and each of the first engagement surface and the second engagement surface configured to retain a striker in a rearward position, wherein the striker is configured to move along a bore axis of the handgun between the rearward position and a forward position; and
a lower arm extending down from the distal end portion of the sear body, the lower arm configured to contact a trigger bar moving along the bore axis to pivot the sear about the distal end portion.

2. The sear of claim 1 , wherein the first engagement surface and the second engagement surface are defined along a top portion of the sear body.

3. The sear of claim 2 , wherein when the first engagement surface is oriented vertically, a first tip of the first engagement surface is vertically higher than a second tip of the second engagement surface.

4. The sear of claim 2 , wherein the second engagement surface is defined at least in part by a recess in the top portion located distally of the first engagement surface.

5. The sear of claim 2 , wherein one or both of the first engagement surface and the second engagement surface is defined by a vertical face connected to a surface sloping upwardly and proximally along the top portion of the sear body.

6. A fire control assembly for a semiautomatic handgun, the fire control assembly comprising:
a sear with a top portion extending from a proximal end portion to a distal end portion, wherein the top portion defines a first engagement surface and a second engagement surface positioned distally of the first engagement surface, the first engagement surface and the second engagement surface each configured to retain a striker in a rearward position, and wherein the sear is pivotable about the distal end portion between a cocked position and a displaced position, the sear including a lower arm extending down from the distal end portion, the lower arm configured to contact a trigger bar moving along the bore axis to pivot the sear about the distal end portion;
a sear spring acting on the sear to bias the sear towards the cocked position; and
a striker with a striker catch, the striker movable along a bore axis between a rearward position and a forward position, wherein the striker catch engages the first engagement surface when the striker is in the rearward position and the sear is in the cocked position;
wherein, except when the sear is moved to the displaced position as a result of user action, the sear is configured to recover from the displaced position in which the striker catch is disengaged from the first engagement surface to a recovered position in which the second engagement surface is in a path of the striker catch.

7. The fire control assembly of claim 6 , wherein the user action is one or more of (i) a trigger pull or (ii) operating a takedown lever, causing the sear to move to the displaced position.

8. The fire control assembly of claim 6 , wherein the user action maintains the sear in the displaced position for more than 0.1 second.

9. The fire control assembly of claim 6 , wherein the user action maintains the sear in the displaced position for more than 0.2 second.

10. The fire control assembly of claim 6 , wherein the displaced position is a fully displaced position of the sear.

11. The fire control assembly of claim 6 , wherein the sear moving to the displaced position is due to an impulse.

12. A semiautomatic handgun comprising:
a frame with a receiver;
a sear pivotably connected to the receiver, the sear including a sear body with a top portion extending between a distal end portion and a proximal end portion, the top portion defining a first engagement surface and a second engagement surface between the first engagement surface and the distal end portion, the sear also including a lower arm extending down from the distal end portion, the lower arm configured to contact a trigger bar moving along the bore axis to pivot the sear about the distal end portion, wherein the first engagement surface and the second engagement surface face proximally and each of the first engagement surface and the second engagement surface configured to retain a striker in a rearward position, and wherein the sear is pivotable about the distal end portion between a cocked position and a displaced position;
a sear spring disposed between an inside of the frame and the proximal end portion of the sear, the sear spring configured to bias the sear towards the cocked position; and
a striker with a striker catch, the striker movable along a bore axis between a rearward position and a forward position, wherein the striker catch engages the first engagement surface when the striker is in the rearward position and the sear is in the cocked position.

13. The semiautomatic handgun of claim 12 , wherein the displaced position is sufficient to disengage the striker catch from the first engagement surface.

14. The semiautomatic handgun of claim 13 , wherein, the sear is configured to recover from the displaced position to engage the striker catch and arrest distal movement of the striker except when the sear is moved to the displaced position as a result of user action selected from (i) a trigger pull or (ii) operating a takedown lever.

15. The semiautomatic handgun of claim 14 , further comprising a takedown lever; and
a trigger bar coupled to the takedown lever, the trigger bar configured to pivot the sear about the distal end portion to release the striker from engagement with the sear when the takedown lever is moved to the takedown position.

16. The semiautomatic handgun of claim 14 , wherein the user action maintains the sear in the displaced position for more than 0.1 second.

17. The semiautomatic handgun of claim 12 , wherein a tip of the first engagement surface is vertically higher than a tip of the second engagement surface when the first engagement surface is oriented vertically.

18. The semiautomatic handgun of claim 12 , wherein the top portion defines a recess between the first engagement surface and the second engagement surface.

19. The semiautomatic handgun of claim 12 , wherein the top portion is aligned along a path of the striker catch.

20. The semiautomatic handgun of claim 12 , wherein when the sear is displaced so that the first engagement surface is moved out of a path of the striker catch, the second engagement surface is also out of the path of the striker catch.

Assignees

• Sig Sauer Inc

Inventors

• Thomele Adrian
• Toner Sean P
• Larochelle Albert Richard
• Cornish Keith Andrew
• Kimball Mark
• Loriot Andrew Phillip
• Barker Matthew Thomas
• Oaks Derek A
• Thibodeau Tyler Robert
• Shoemaker Joshua Robert
• Guillemette Eric Raymond
• Couture Michael D
• Messier Zachary
• Shawley Jacob Thomas
• Steimke David

Classifications

• F41A19/32 Primary

  for catching the percussion or firing pin after each shot, i.e. in single-shot or semi-automatic firing mode · CPC title

• F41A19/12

  Sears; Sear mountings · CPC title