Adjustable firearm trigger mechanism and method of adjustment

• US 7,188,561 B1
• Filed: 12/08/2005
• Issued: 03/13/2007
• Est. Priority Date: 12/08/2005
• Status: Expired due to Fees

• Current Assignee: Kelbly's Rifle Range, Inc.
• Original Assignee: Kelbly's Rifle Range, Inc.
• Inventors: Kelbly, George E.
• Primary Examiner(s): JOHNSON, STEPHEN
• Application Number:
  US11/296,401
• Time in Patent Office: 460 Days
• Field of Search: 891/36, 89/271.1, 891/290.2, 891/30, 891/31, 42/760.1, 42/760.2
• US Class Current: 89/136
• CPC Class Codes: F41A 19/16 Adjustable firing mechanisms; Trigger mechanisms with adjustable trigger pull F41A19/17 takes precedence

Abstract

The adjustable firearm trigger mechanism and method of adjustment includes a firing pin block bar, a pivotally trigger shoe, and a link mechanism interconnecting the trigger shoe and the firing pin block bar. The link mechanism includes a sear bar coupled to the trigger shoe for rotation upon pivotal movement of the trigger shoe, and a push rod slidably disposed in one of a plurality of user selectable push rod holes in the trigger housing between a first pivoting end of the sear bar and the firing pin block bar. A trigger pull adjustment assembly is disposed between a second pivoting end of the sear bar and the trigger housing includes a trigger pull adjustment screw mounted in a threaded passage of the trigger housing, and a sear bar return spring abutting the trigger pull adjustment screw and inserted in a portion of the threaded passage of the trigger housing.

Claims

1. An adjustable firearm trigger mechanism for releasably engaging a firing pin cocking piece, comprising:

a firing pin block bar adapted for pivotal movement between a firing pin cocking piece retaining position and a firing pin cocking piece release position;

a trigger shoe pivotally mounted in spaced relationship to said firing pin block bar;

a link mechanism operably interconnecting said trigger shoe and said firing pin block bar, including;

1) a sear bar operably coupled to said trigger shoe at an engagement point for rotation upon pivotal movement of said trigger shoe, said sear bar rotating about a centrally disposed sear bar pivot pin; and

2) a push rod slidably disposed in one of a plurality of push rod holes in a trigger housing between said sear bar and said firing pin block bar, said plurality of push rod holes are disposed between said sear bar engagement point and said sear bar pivot pin defining a first pivoting end of said sear bar.

2. The adjustable firearm trigger mechanism for releasably engaging a firing pin cocking piece of claim 1, further comprising:

a trigger pull adjustment assembly operably disposed between a second pivoting end of said sear bar and said trigger housing, said trigger pull adjustment assembly including.

3. The adjustable firearm trigger mechanism for releasably engaging a firing pin cocking piece of claim 2, further comprising:

a trigger pull adjustment screw mounted in a threaded passage of said trigger housing.

4. The adjustable firearm trigger mechanism for releasably engaging a firing pin cocking piece of claim 2, further comprising:

a sear bar return spring abutting said trigger pull adjustment screw on a first end and said sear bar on a second end.

5. A method of adjusting a firearm trigger mechanism for releasably engaging a firing pin cocking piece, said firearm trigger mechanism including a firing pin block bar adapted for pivotal movement between a firing pin cocking piece retaining position and a firing pin cocking piece release position, a trigger shoe pivotally mounted in spaced relationship to said firing pin block bar, a sear bar operably coupled to said trigger shoe at an engagement point for rotation upon pivotal movement of said trigger shoe, said sear bar rotating about a centrally disposed sear bar pivot pin, a push rod slidably disposed in one of a plurality of push rod holes in a trigger housing between said sear bar and said firing pin block bar, wherein said plurality of push rod holes are disposed between said sear bar engagement point and said sear bar pivot pin, a trigger pull adjustment screw mounted in a threaded passage of said trigger housing, and a sear bar return spring abutting said trigger pull adjustment screw on a first end and said sear bar on a second end, said method comprising the steps of:

inserting said push rod into one of said plurality of push rod holes in said trigger housing; and

securing said firing pin block bar to contact a first end of said push rod.

6. The method of adjusting a firearm trigger mechanism for releasably engaging a firing pin cocking piece of claim 5, said method further comprising the steps of:

removing said push rod from one of said plurality of push rod holes in said trigger housing;

inserting said push rod into another of said plurality of push rod holes in said trigger housing; and

securing said firing pin block bar to contact said first end of said push rod.

7. The method of adjusting a firearm trigger mechanism for releasably engaging a firing pin cocking piece of claim 5, said method further comprising the steps of:

inserting a sear bar return spring into said threaded passage of said trigger housing.

8. The method of adjusting a firearm trigger mechanism for releasably engaging a firing pin cocking piece of claim 7, said method further comprising the steps of:

adjusting said trigger pull adjustment screw to compress said sear bar return spring against said sear bar.