Rapidly-adjustable butt stock assembly

• US 7,793,453 B1
• Filed: 11/17/2008
• Issued: 09/14/2010
• Est. Priority Date: 11/15/2007
• Status: Expired due to Fees

• Current Assignee: FN Manufacturing, Inc., FN Herstal SA (Government of France)
• Original Assignee: FN Manufacturing, Inc., FN Herstal SA (Government of France)
• Inventors: Hass, Kevin M., Schmitter, Edward P., Sewell, Robert Wayne Jr., Brisbon, Eric S.
• Primary Examiner(s): Hayes; Bret
• Application Number:
  US12/272,135
• Time in Patent Office: 666 Days
• Field of Search: 42/710.1, 42/710.2, 42/72, 42/73, 42/74, 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 23/14 Adjustable stock or stock parts, i.e. adaptable to personal requirements, e.g. length, pitch, cast or drop

Abstract

A rapidly-adjustable butt stock assembly comprised of a butt stock, a buffer, a slot cylinder, a key cylinder, and keys. The butt stock has a cylindrical recess with key grooves longitudinally therein for receiving the slot and key cylinders. The key cylinder is rigidly attached to the buffer. The slot cylinder has at least one longitudinal slot with a plurality of transverse slots extending therefrom. The key cylinder carries one or more keys, which keys extend through the key cylinder and the slot cylinder and into the key grooves of the butt stock. To adjust the length of the assembly, the user rotates the slot cylinder so that the keys rotate out of the transverse slots and into the longitudinal slot of the slot cylinder thus permitting the key cylinder to move axially with respect to the butt stock.

Claims

1. A butt stock assembly, comprising:

a butt stock having a generally cylindrical recess formed therein;

a buffer assembly, said butt stock being carried by said buffer assembly; and

a comb having a front portion and an opposing rear portion, said comb being carried by said butt stock so that said comb pivots from a point proximate said front portion so that said rear portion is elevatable with respect to said butt stock,

wherein said butt stock has

a hollow slot cylinder carried within said cylindrical recess and connected to said buffer assembly, said slot cylinder having spaced-apart transverse slots and a longitudinal slot, said transverse slots communicating with said longitudinal slot,

a key cylinder carried within said hollow slot cylinder, and

a key carried by said key cylinder so that said key extends radially outward from said key cylinder into either one of said transverse slots or said longitudinal slot whereby said key cylinder can be moved axially with respect to said slot cylinder by rotating said slot cylinder so that said key carried by said key cylinder is in said longitudinal slot.

2. The butt stock assembly as recited in claim 1, further comprising a torsion spring in operative connection with said key cylinder and said butt stock to urge said key of said key cylinder into one of said transverse slots of said slot cylinder.

3. The butt stock assembly as recited in claim 1, wherein said cylindrical recess formed in said butt stock has a key groove and wherein said key carried by said key cylinder extends through either one of said transverse slots or said longitudinal slot of said slot cylinder into said key groove, said key groove preventing rotation of said key cylinder with respect to said butt stock but not with respect to said slot cylinder.

4. The butt stock assembly as recited in claim 1, further comprising a spring-loaded button carried by said butt stock and wherein said comb has plural holes formed in said rear portion, said holes being dimensioned to fit into said plural holes, each hole of said plural holes holding said comb at a different elevation.

5. The butt stock assembly as recited in claim 1, wherein said slot cylinder carries a collar, said collar permitting rotation of said slot cylinder with respect to said key cylinder.

6. The butt stock assembly as recited in claim 1, wherein said butt stock further comprises:

an end cap; and

a shoulder rest pivotally attached to said end cap so that said shoulder rest can be pivoted from a first position parallel to and against said end cap and a second position perpendicular to said end cap.

7. The butt stock assembly as recited in claim 1, wherein said butt stock has a button hole formed therein and further comprising:

an end cap carried by said butt stock; and

a spring-loaded button mechanism with a spring loaded button dimensioned to fit into said button hole, said end cap carrying said spring-loaded button mechanism, said spring-loaded button extending through said button hole to secure said end cap to said butt stock.

8. A butt stock assembly, comprising:

a butt stock having a generally cylindrical hole formed therein, said cylindrical hole having a key groove formed therein;

a hollow slot cylinder carried within said cylindrical hole of said butt stock and having plural spaced-apart transverse slots and a longitudinal slot, said transverse slots communicating with said longitudinal slot, said longitudinal slot being aligned with said key groove of said butt stock;

a key cylinder carried within said hollow slot cylinder;

a buffer assembly carried by said key cylinder; and

a key carried by said key cylinder and extending through either one of said transverse slots or said longitudinal slot so that said key extends radially outward from said key cylinder through either one of said transverse slots or said longitudinal slot of said slot cylinder into said slot groove of said cylindrical hole in said butt stock, whereby said key cylinder can be moved axially with respect to said slot cylinder when said key of said key cylinder is in said longitudinal slot but is prevented from moving axially when said key of said key cylinder is in a transverse slot of said plural transverse slots.

9. The butt stock assembly as recited in claim 8, further comprising a second key and wherein said plural transverse slots is at least three slots.

10. The butt stock assembly as recited in claim 8, wherein said slot cylinder carries a collar, said collar permitting rotation of said slot cylinder with respect to said key cylinder.

11. The butt stock assembly as recited in claim 8, further comprising a torsion spring in operative connection with said key cylinder and said butt stock to urge said key of said key cylinder into one of said transverse slots of said slot cylinder.

12. The butt stock assembly as recited in claim 8, wherein said butt stock further comprises:

an end cap; and

a shoulder rest pivotally attached to said end cap so that said shoulder rest can be pivoted from a first position parallel to and against said end cap and a second position perpendicular to said end cap.

13. The butt stock assembly as recited in claim 8, wherein said butt stock has a button hole formed therein and further comprising:

an end cap carried by said butt stock; and

a spring-loaded button mechanism with a spring loaded button dimensioned to fit into said button hole, said end cap carrying said spring-loaded button mechanism, said spring-loaded button extending through said button hole to secure said end cap to said butt stock.

14. The butt stock assembly as recited in claim 8, further comprising a pivotable comb.

15. The butt stock assembly as cited in claim 14, wherein said comb has a front portion and an opposing back portion and wherein said front portion of said comb is pivotally attached to said butt stock so that said back portion can be elevated above said butt stock.

16. The butt stock assembly as recited in claim 15, wherein said butt stock includes a spring-loaded button assembly with a spring-loaded button, wherein said butt comb has at least two button holes formed therein dimensioned for receiving said spring-loaded button, each button hole of said at least two button holes holding said comb at a different elevation with respect to said butt stock.