Folding stock for firearms and firearms employing same

• US 4,383,384 A
• Filed: 12/03/1980
• Issued: 05/17/1983
• Est. Priority Date: 12/03/1980
• Status: Expired due to Term

• Current Assignee: Dean Machine Products Incorporated
• Original Assignee: Dean Machine Products Incorporated
• Inventors: Fox, Gerard J.
• Primary Examiner(s): Jordan, Charles T.
• Assistant Examiner(s): Parr, Ted L.
• Application Number:
  US06/212,542
• Time in Patent Office: 895 Days
• Field of Search: 42/71 R, 42/72, 42/73, 42/75 C
• US Class Current: 42/72
• CPC Class Codes: F41C 23/04 Folding or telescopic stocks or stock parts articulated or collapsible guns F41A11/04

Abstract

A folding stock includes a butt plate that assumes its operational orientation in both the extended and the folded positions of the stock. A pivot arm is pivotably mounted on a mount that is adjustably inserted into recesses in the rear of the receiver of the weapon. The pivot arm pivots about the mount pivot axis at its one end and has a butt member pivotably mounted at its other end. The butt member has a horizontal stock portion and a vertical butt-plate portion at the rear. A spring fastened to the mount acts as a lock for both the pivot arm and the butt member.

Claims

1. A firearm comprising:

a. a receiver portion;

b. a barrel extending from one end of said receiver portion; and

c. a foldable stock assembly on the other end of said receiver portion and including;

(i) an elongated pivot arm;

(ii) pivot means detachably secured to said other end of said receiver portion and pivotably mounting one end of said pivot arm on said receiver portion for movement between a first position in which said pivot arm extends away from said other end of said receiver portion and a second position in which said pivot arm extends towards said barrel; and

(iii) a butt member including an elongated stock portion and a butt-plate portion at one end thereof, said stock portion being pivotably mounted on said pivot arm adjacent the other end of said pivot arm for pivoting between a first position in which said stock portion extends away from said receiver portion and rearwardly of said pivot arm when said pivot arm is in its first position and a second position in which it extends longitudinally of said firearm along the upper surface of said receiver portion when said pivot arm is in its second position, said one end of said butt member being disposed rearwardly of said receiver portion in either position thereof, said butt portion extending at an angle to the longitudinal axis of said stock portion to bear against the body of a user when said butt member is in either of said pivoted positions.

2. The firearm of claim 1 further including pivot-arm locking means for locking said pivot arm in its first position and butt-member locking means for locking said butt member in its first position when said pivot arm is in its first position.

3. The firearm of claim 2 wherein said pivot-arm locking means includes resiliently deflectable spring means on said pivot means and an engagement surface on said pivot arm, said spring means providing a detent, said engagement surface being spaced from the pivot axis of said pivot means to move upon pivoting of said pivot arm, said engagement surface engaging said spring means and being disposed in said detent therein when said pivot arm is in said first position, pivoting of said pivot arm from said first position requiring movement of said engagement surface out of said detent by resilient deflection of said spring means, said spring means and said engagement surface thereby locking said pivot arm in its first position.

4. The firearm of claim 3 wherein said butt-member locking means includes:

a. second resiliently deflectable spring means on said pivot means, said second spring means providing a detent thereon; and

b. an engagement surface on said stock portion of said butt member spaced from the pivot axis of said butt member, said engagement surface engaging said second spring means and being disposed in said detent therein when said butt member and said pivot arm are in said first positions thereof, movement of said butt member out of said first position requiring movement of said engagement surface out of said detent by resilient deflection of said spring means, said spring means and said engagement surface thereby locking said butt member in said first position thereof.

5. The firearm of claim 1 wherein said pivot means includes a body portion and at least one elongated finger portion extending longitudinally from said body portion of said pivot means, and wherein said receiver portion provides a longitudinally extending recess in the rear thereof associated with each finger portion of said pivot means and receiving the associated finger portion member therein.

6. The firearm of claim 5 wherein said pivot arm includes a pair of generally elongated pivot plates each pivotably mounted at one end thereof on said body portion of said pivot means for pivoting about the pivot axis of said pivot means, each of said pivot plates being pivotably mounted at the other end thereof on said butt member for pivoting about the pivot axis of said butt member, said pivot plates being horizontally spaced and extending longitudinally along opposite sides of said receiver portion when said pivot arm is in said second position thereof.

7. The firearm of claim 6 wherein said pivot arm includes a locking bar extending between said pivot plates at said one end thereof and spaced from the pivot axis of said pivot means to extend under said pivot means when said pivot arm is in said first position, said pivot means including spring means providing a detent receiving said locking bar when said pivot arm is in said first position, pivoting of said pivot arm from said first position requiring movement of said locking arm out of said detent by resilient deflection of said spring means, said locking bar and said spring means thereby locking said pivot arm in its first position.

8. The firearm of claim 1 wherein said receiver portion thereof provides a rear sight on its upper surface near the rear thereof and wherein said stock portion has an aperture therein in which said rear sight is received when said pivot arm and said butt member are in their second positions.

9. The firearm of claim 1 wherein said butt member is inclined from the horizontal in said first position thereof.

10. The firearm of claim 1 wherein said pivot arm includes a pair of generally elongated pivot plates each pivotably mounted at one end thereof on said pivot means for pivoting about the pivot axis of said pivot means, each of said pivot plates being pivotably mounted at the other end thereof on said butt member for pivoting about the pivot axis of said butt member, said pivot plates being horizontally spaced and extending longitudinally along opposite sides of said receiver portion when said pivot arm is in its second position.

11. The firearm of claim 10 wherein said pivot arm includes a locking bar extending between said pivot plates at said one end thereof and spaced from the pivot axis of said pivot means to extend under said pivot means when said pivot arm is in said first position, said pivot means including spring means providing a detent receiving said locking bar when said pivot arm is in said first position, pivoting of said pivot arm from said first position requiring movement of said locking arm out of said detent by resilient deflection of said spring means, said locking bar and said spring means thereby locking said pivot arm in its first position.