Method for manufacturing sight frame attachable to handgun and sight frame attachable to handgun

• US 9,297,613 B2
• Filed: 03/12/2013
• Issued: 03/29/2016
• Est. Priority Date: 03/15/2012
• Status: Active Grant

• Current Assignee: Timo Maentymaa
• Original Assignee: Timo Maentymaa
• Inventors: Maentymaa, Timo
• Primary Examiner(s): Johnson, Stephen M
• Assistant Examiner(s): GOMBERG, BENJAMIN S
• Application Number:
  US13/796,625
• Publication Number:
  US 20130247440A1
• Time in Patent Office: 1,113 Days
• Field of Search: 421/11, 42 7101- 73
• US Class Current: 1/1
• CPC Class Codes: F41C 23/12 Auxiliary stocks for stabilising, or for transforming pistols, e.g. revolvers, into shoulder-fired guns
• CPC Class Codes: F41G 1/00 Sighting devices for indirect laying of fire F41G3/16; bombsights F41G3/24 ; structurally associated with laser telemeters F41G3/065; mounting tubular or beam shaped aiming devices on firearms F41G11/001
• CPC Class Codes: F41G 11/003 Mountings with a dove tail element, e.g. "Picatinny rail systems"
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A sight frame with which the user can convert a handgun into a rifle-like gun is disclosed. The sight frame includes a frame part and stock, as well as an intermediate slide and locking and guide structures in such a manner that said locking and guide structures are arranged on the sight frame for fast attachment to a handgun and that said intermediate slide is by means of the lifting force provided by the locking and guide structures to the handgun arranged to support itself play free against the slide of the handgun along a major portion of the slide and to support itself through the guide surfaces play free against the guide surfaces arranged on the frame part of the sight frame.

Claims

1. A method for manufacturing a handgun converter, the handgun converter comprising a sight frame attachable to a handgun, the method comprising:

the manufacturing of a frame part of the sight frame, a folding stock of the frame part, the folding stock being attachable to the frame part, an intermediate slide which is configured to be placed between the frame part and the handgun, and locking and guide structures comprising guide surfaces made on the intermediate slide and the frame part, the intermediate slide and the locking and guide structures being configured to attach the frame part to the handgun,

wherein the locking and guide structures are manufactured to provide a lifting force to the handgun and the guide surfaces are provided on the frame part and the intermediate slide in such a manner that the intermediate slide is, by means of the lifting force provided by the locking and guide structures to the handgun, (i) arranged to be supported play free against a slide of the handgun along a major portion of a length of the handgun slide and (ii) further arranged to be supported through the guide surfaces of the intermediate slide play free against the guide surfaces arranged on the frame part of the sight frame,

wherein the intermediate slide is a channel formed part pressed from a steel plate and has the guide surfaces leaning at a certain point on top bevels of the slide of the handgun that are essentially at the same angle as the guide surfaces arranged on the frame part of the sight frame, and

wherein said locking and guide structures comprise a turning/locking piece and an operating spring that produce the lifting force on a bottom surface of a trigger guard of the handgun, the lifting force supporting the slide of the handgun play free to the intermediate slide.

2. The method as claimed in claim 1, wherein the frame part of the sight frame is made of hardened steel.

3. The method as claimed in claim 1, wherein a top part of the frame part of the sight frame is made of hardened steel and the rest of the frame part of the sight frame is made by polymer casting.

4. The method as claimed in claim 1, wherein a reinforcing part is attached to a rear part of the intermediate slide by welding.

5. The method as claimed in claim 1, wherein said turning/locking piece is made by casting or machining steel, aluminum, aluminum alloy, polymer, or composite material.

6. A handgun converter comprising:

a sight frame attachable to a handgun, the sight frame comprising a frame part, a stock which is attachable to the frame part, an intermediate slide configured to be placed between the frame part and the handgun, and locking and guide structures comprising guide surfaces made on the intermediate slide and the frame part, the locking and guide structures as well as the intermediate slide being configured for attaching the sight frame to the handgun in such a manner that the locking and guide structures are configured to provide a lifting force to the handgun,

wherein the intermediate slide is, by means of the lifting force provided by the locking and guide structures to the handgun, (i) arranged to be supported play free against a slide of the handgun along a major portion of a length of the handgun slide and (ii) further arranged to be supported through the guide surfaces of the intermediate slide play free against the guide surfaces arranged on the frame part of the sight frame,

wherein the intermediate slide is a channel formed part pressed from a steel plate and has the guide surfaces leaning at a certain point on the top bevels of the slide of the handgun that are essentially at the same angle as the guide surfaces arranged on the frame part of the sight frame, and

wherein said locking and guide structures comprise a turning/locking piece and an operating spring that produce the lifting force on a bottom surface of a trigger guard of the handgun, the lifting force supporting the slide of the handgun play free to the intermediate slide.

7. The handgun converter as claimed in claim 6, wherein on the frame part of the sight frame, there is a support angle surface for the intermediate slide to keep the intermediate slide at the correct height and in place on the frame part.

8. The handgun converter as claimed in claim 6, wherein the sight frame comprises a front piece which front piece stiffens a front end of the frame part against torsional forces.

9. The handgun converter as claimed in claim 6, wherein the sight frame comprises a rear piece which rear piece is arranged to lift the handgun on the sight frame when the handgun is pulled back.

10. The handgun converter as claimed in claim 6, wherein the sight frame comprises fastening rails for additional devices and locking counter-pieces of the fastening rails.

11. The handgun converter as claimed in claim 6, wherein the sight frame comprises a locking/release sleeve, an operating spring of the locking/release sleeve, and a turning axle pin of the stock.