Adjustable buttstock assembly

• US 8,186,090 B1
• Filed: 06/28/2010
• Issued: 05/29/2012
• Est. Priority Date: 06/29/2009
• Status: Expired due to Fees

• Current Assignee: United States Secretary of the Army
• Original Assignee: The United States Of America As Represented By The Secretary Of The Army
• Inventors: Chiarolanza, Joseph P., Bauer, Kevin T., Collado, Marcos A.
• Primary Examiner(s): Hayes, Bret
• Assistant Examiner(s): TILLMAN, JR, REGINALD S
• Application Number:
  US12/824,570
• Time in Patent Office: 701 Days
• Field of Search: 42/710.1, 42/72, 42/73, 42/750.3
• US Class Current: 42/73
• CPC Class Codes: F41C 23/04 Folding or telescopic stocks or stock parts articulated or collapsible guns F41A11/04
• CPC Class Codes: F41C 23/06 Stocks or firearm frames specially adapted for recoil reduction
• CPC Class Codes: F41C 23/14 Adjustable stock or stock parts, i.e. adaptable to personal requirements, e.g. length, pitch, cast or drop

Abstract

An adjustable buttstock assembly for a hand carried weapons, wherein an inner stock extends from and slidably moves into an outer stock to provide the length adjustment and where a set of opposed spring loaded engagement pins, located in the end of the inner stock, extend through a set of discrete, opposed openings in the outer stock to securely hold the stocks in position one relative to the other. One of the engagement pins, engages into one of a series of discrete holes located in the lower side of the outer stock, while the other engages into one of a series of partial oval opening, opposed thereto, the series of partial oval openings located on the upper side of the outer stock separated by flat teeth, to form a rack, with each partial oval opening into an open channel running the length of the rack. Such that when the lower engagement pin is compressed into the lower opening in which it may be and the upper engagement pin then rotated out of the partial oval opening into the channel—the inner and outer stocks are then free to move one with respect to the other to extend or compress the adjustable buttstock. Further, the inner stock is fixed to a backplate that engages with the receiver of the weapon, and provides protection for a hydraulic buffer that engages with the receiver of the weapon and extends into the inner stock.

Claims

1. An adjustable buttstock assembly for a hand carried weapon, comprising:

a backplate and latch assembly which latches to the receiver of the weapon;

a cylindrical inner stock having a first and second end, which first end is fixed to the backplate and latch assembly;

a cylindrical hydraulic buffer having a first end that rests against the back of the weapon, which cylindrical buffer is secured to and passes through the backplate and latch assembly and extends within the inner stock, such that the second end thereof extends generally to the mid-point of the length of the inner stock;

a cylindrical outer stock having a first and second end, which first end of said outer stock slidably accepts therein the second end of the inner stock, and which second end of said outer stock is secured to a buttplate;

a lower engagement pin and an upper engagement pin mounted on the opposed ends of a compression spring located within a sleeve held transversely within the inner stock, near the second end thereof;

the outer stock having a plurality of discrete holes located along the lower side thereof;

the outer stock having a plurality of partial oval openings located along the upper side thereof, which upper partial oval openings are opposed to the discrete holes located along the lower side thereof;

the plurality of upper partial oval openings being separated by generally flattened teeth, to form a rack, where the partial oval openings open into a channel that runs the length of the rack;

wherein, when the inner stock is slidably located within the outer stock, the compression spring will force the lower and upper engagement pins, into the set of opposed lower holes and upper openings, respectively, within the outer stock when the openings and holes are aligned therewith, thereby locking the inner and outer stocks into a particular relative position, one to the other; and

whereby, when the lower engagement pin is compressed, compressing the compression spring, such that the lower engagement pin is within the outer stock, and thereby the outer stock is thus free to rotate, and is rotated in relation to the inner stock such that the upper engagement pin moves out of the particular partial oval opening in which it may be, into the channel, whereby by the inner stock can be moved longitudinally unimpeded relative to the outer stock to any discrete position having the opposed lower hole and upper partial oval opening, such that the stocks can be rotated back, in the opposite direction, to reengage the lower and upper engagement pins into a new set of opposed lower hole and upper partial oval opening, to thereby change the relative extension of the inner and outer stocks.

2. The adjustable buttstock assembly for a hand carried weapon of claim 1, further comprising a removable hollow cheekrest, which cheekrest has a first and second end, the first end of which has a tongue extending therefrom, which tongue mates with a groove affixed to the buttplate, and which second end is screwed down to the upper side of the outer stock, thereby providing a cover for the rack.

3. The adjustable buttstock assembly for a hand carried weapon of claim 1, wherein the outer stock has a plurality of parallel flutes along its length.

4. The adjustable buttstock assembly for a hand carried weapon of claim 1, wherein the inner stock is manufactured of aluminum, and the outer stock is manufactured of heat treated steel.

5. The adjustable buttstock assembly for a hand carried weapon of claim 1, wherein the upper engagement pin has a cylindrical button top, and the lower engagement pin has a beveled end.