Sear mechanism for a firearm

• US 9,759,504 B2
• Filed: 08/31/2016
• Issued: 09/12/2017
• Est. Priority Date: 08/27/2014
• Status: Active Grant

• Current Assignee: WHG Properties, LLC
• Original Assignee: WHG Properties, LLC
• Inventors: Geissele, William H.
• Primary Examiner(s): CLEMENT, MICHELLE RENEE
• Application Number:
  US15/252,655
• Publication Number:
  US 20160370139A1
• Time in Patent Office: 377 Days
• Field of Search: 42 6901
• CPC Class Codes: B23H 7/02 Wire-cutting
• CPC Class Codes: B23H 9/00 Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects heat treatment by cathodic discharge C21D1/38
• CPC Class Codes: F41A 19/10 Triggers; Trigger mountings
• CPC Class Codes: F41A 19/12 Sears; Sear mountings
• CPC Class Codes: F41A 19/14 Hammers, i.e. pivotably-mounted striker elements; Hammer mountings

Abstract

A sear mechanism for a firearm includes a trigger element having one or more contact surfaces on which one or more movable or pivotable components of the sear mechanism selectively contacts or slides. In some embodiments, the trigger element is made by producing an intermediate workpiece of the trigger element by a manufacturing process, and electric discharge machining the intermediate workpiece of the trigger element to provide the contact surfaces.

Claims

1. A sear mechanism for a firearm, comprising:

a housing configured to be detachably mounted in a firearm;

a trigger element pivotally connected to the housing and configured to be connected to a trigger through a trigger rod disposed within the firearm, the trigger element comprising;

a trigger biasing mechanism configured to bias the trigger element relative to the housing;

a trigger sear including a sear contact surface;

a sear processing aperture arranged adjacent the sear contact surface; and

a disconnector pad including a disconnector contact surface;

a disconnector element disposed in the housing and pivotally connected to at least one of the housing and the trigger element, the disconnector element comprising;

a trigger element contact portion arranged at a first end of the disconnector element and configured to selectively contact the disconnector pad of the trigger element;

a hammer sear contact face arranged at a second end of the disconnector element; and

a disconnector biasing mechanism configured to bias the disconnector element relative to the trigger element such that the trigger element contact portion is biased to contact the disconnector pad;

a hammer element disposed in the housing and configured to pivot between a cocked position and a released position, the hammer element comprising;

a hammer biasing mechanism configured to bias the hammer element to the released position; and

a hammer sear having a first sear edge and a second sear edge, the first sear edge configured to be selectively contact the sear contact surface of the trigger sear and engaged with the trigger sear in the cocked position, and the second sear edge configured to selectively contact the hammer sear contact face of the disconnector element,

wherein at least one of the trigger element and the disconnector element is configured to pivot against resistance of at least one of the trigger biasing mechanism and the disconnector biasing mechanism as the trigger is pulled, and

wherein the first sear edge of the hammer sear is engaged to the trigger sear of the trigger element in the cocked position, and when released from the trigger sear of the trigger element in the released position, causes the hammer element to rotate by force of the hammer biasing mechanism and strike a firing pin of the firearm.

2. The sear mechanism of claim 1,

wherein the hammer element further comprises a hammer tail, and

wherein the trigger element further comprises a hammer pad configured to selectively engage the hammer tail of the hammer element.

3. The sear mechanism of claim 1, wherein the trigger element further includes a disconnector pad processing aperture arranged adjacent the disconnector contact surface.

4. The sear mechanism of claim 1, wherein the sear contact surface and the disconnector contact surface are produced by electrical discharge machining.

5. The sear mechanism of claim 2, wherein the hammer contact surface is produced by electrical discharge machining.

6. A firearm comprising the sear mechanism of claim 1.

7. A sear mechanism for a firearm, comprising:

a housing configured to be detachably mounted in a firearm;

a trigger element pivotally connected to the housing and configured to be connected to a trigger through a trigger rod disposed within the firearm, the trigger element comprising;

a trigger biasing mechanism configured to bias the trigger element relative to the housing;

a trigger sear including a sear contact surface;

a disconnector pad including a disconnector contact surface; and

a disconnector pad processing aperture arranged adjacent the disconnector contact surface;

a disconnector element disposed in the housing and pivotally connected to at least one of the housing and the trigger element, the disconnector element comprising;

a trigger element contact portion arranged at a first end of the disconnector element and configured to selectively contact the disconnector pad of the trigger element;

a hammer sear contact face arranged at a second end of the disconnector element; and

a disconnector biasing mechanism configured to bias the disconnector element relative to the trigger element such that the trigger element contact portion is biased to contact the disconnector pad;

a hammer element disposed in the housing and configured to pivot between a cocked position and a released position, the hammer element comprising;

a hammer biasing mechanism configured to bias the hammer element to the released position; and

a hammer sear having a first sear edge and a second sear edge, the first sear edge configured to be selectively contact the sear contact surface of the trigger sear and engaged with the trigger sear in the cocked position, and the second sear edge configured to selectively contact the hammer sear contact face of the disconnector element,

wherein at least one of the trigger element and the disconnector element is configured to pivot against resistance of at least one of the trigger biasing mechanism and the disconnector biasing mechanism as the trigger is pulled, and

wherein the first sear edge of the hammer sear is engaged to the trigger sear of the trigger element in the cocked position, and when released from the trigger sear of the trigger element in the released position, causes the hammer element to rotate by force of the hammer biasing mechanism and strike a firing pin of the firearm.

8. The sear mechanism of claim 7, wherein the sear contact surface and the disconnector contact surface are produced by electrical discharge machining.

9. The sear mechanism of claim 7,

wherein the hammer element further comprises a hammer tail, and

wherein the trigger element further comprises a hammer pad configured to selectively engage the hammer tail of the hammer element.

10. The sear mechanism of claim 9, wherein the hammer contact surface is produced by electrical discharge machining.

11. A firearm comprising the sear mechanism of claim 7.