US20080156184A1

US20080156184A1 - Novelty in the Piston Used in the Gas Operated Semi-Automatic Shotguns

Info

Publication number: US20080156184A1
Application number: US11/944,735
Authority: US
Inventors: Fatih Yollu
Original assignee: Ata Av Tufekleri Sanayi ve Ticaret Ltd Sirketi
Current assignee: Ata Av Tufekleri Sanayi ve Ticaret Ltd Sirketi
Priority date: 2006-11-24
Filing date: 2007-11-26
Publication date: 2008-07-03
Also published as: ITAN20070027U1

Abstract

A piston element, which has a piston element made of a single piece, one of the important parts of a gas operated shotgun enabling the shotgun to operate, and the piston rings assembled into the slots on the piston element. At least one female part connects with at least one male part, forming the piston element, in order to provide the piston element to be formed by screwing two parts to each other and positioning the piston ring between the same, and at least one sealing member positioned between the male and the female part.

Description

TECHNICAL FIELD

The present invention relates to the piston in the hunting shotguns, which is one of the components enabling the shotgun to operate.
The invention relates in particular to a new piston structure, wherein the piston element, one of the important parts of the gas operated semi-automatic hunting shotguns, enabling said shotgun to operate, is improved and thus many drawbacks are overcome.

STATE OF THE ART

Today, the gas operated semi-automatic hunting shotguns are widely used. In the semi-automatic hunting shotguns in use, the piston rings are generally located inside the piston ring slots formed on the piston. The duty of the piston rings assembled into the grooves and/or slots opened on the piston is to provide the smooth operation of the shotgun by preventing the leakage of the powder gas formed upon the explosion of the cartridge.
The utility model application no. TR200400910U of ATA AV TÜFEKLERI SAN. TIC. LTD. STi. mentions about the piston element, one of the functional components enabling the shotgun to operate, and its backup apparatus, in the gas operated hunting shotguns.
However, there are some drawbacks formed during the operation of the piston. Sometimes, especially in the high pressure cartridges, the powder gas enters underneath the piston ring on the piston, leading the piston ring to come out of the slot and/or the groove into which it is placed. In such a case, the shotgun goes out of order and fails to operate.
It is required to replace the piston or the piston rings on the piston, meaning extra maintenance and labor costs. Also, the lifetime of the piston becomes shortened and in case the replacement of the piston ring on the piston is not carried out, the shotgun does not operate. The assembly of the piston rings on the piston is difficult. Special piston ring tools are needed to assemble the rings into the piston ring slots on the piston. This leads to some undesirable conditions. Moreover, the need has arose to improve the known piston structure, in order to prevent the piston ring from coming out of its slot under high pressure and to extend the lifetime of the piston. In this manner, the operational lifetime of the shotguns will be extended and an efficient operation will be obtained.

OBJECT OF THE INVENTION

Based on the state of the art, the object of the invention is to eliminate the drawbacks in the existing piston structure and to develop a new piston element, which prevents the piston ring from coming out of its slot under the high gas pressures.
Another object of the invention is to provide that the piston element is comprised by two parts and that the piston ring is positioned between said two parts.
Another object of the invention is to provide that the piston ring slot/groove is obtained by screwing the two parts that constitute the piston element and that the piston ring is positioned between said two parts and screwed in place.
Another object of the invention is to mount the piston ring assembly protrusion formed on the piston ring into the piston ring groove formed inside one of the two parts constituting the piston element, and thus to screw said two parts to complete the assembly.
In order to achieve said objects, the female element and the male element are formed to be mounted on the piston body. The piston ring is mounted between the female and the male element. Female and male element are screwed to be assembled to each other and the assembly protrusion on the piston ring engages into the slot and/or the groove formed inside the female element. In this way, the gas leakage from underneath the piston ring and the piston ring's dislocation from its slot are prevented at high pressure. The operational lifetimes of the shotguns are extended and a more efficient operation is obtained.
According to a preferred embodiment of the invention, in order to enable the piston element to be formed by screwing the two parts and positioning the piston ring between the same, there are provided at least one female part connected with at least one male part, forming the piston element, and also at least one sealing member positioned between the male and female parts.
According to a preferred embodiment of the invention, there is formed at least one sealing member housing on the inner surface of the female part. According to a preferred embodiment of the invention, at least one screwed end formed on the male part comprises at least one assembly protrusion formed on the sealing member, to be mounted into the sealing member housing inside the female part.
According to a preferred embodiment of the invention, there are formed at least one piston ring space obtained by combining the female part and the male part, and at least one piston ring secured and mounted on the piston ring space in the female part.
According to a preferred embodiment of the invention, the piston element is made of two parts, and at least one piston ring is positioned between these two parts.

DESCRIPTION OF THE FIGURES

FIG. 1: The perspective drawing of the piston element, wherein a preferred embodiment of the invention is illustrated.

FIG. 2: The disassembled perspective view of a preferred embodiment of the invention and the assembled view of the piston element.

FIG. 3: The disassembled perspective view of a preferred embodiment of the invention and the assembled view of the piston element, from a different angle of view.

DETAILED DESCRIPTION OF THE INVENTION

Our invention relates to the piston element (4), which enables the gas pressure operated shotguns to operate, wherein the piston element (4) is formed from two parts (1, 3), said two parts (1, 3) are screwed to each other and they are mounted along with the sealing member (2) positioned between the same as these are being screwed. In this way, the sealing member (2) is prevented from being affected by the high gas pressures. In case of the sealing member (2) being replaced, said replacement is enabled to be easily carried out by way of detachment of the two parts.
In FIG. 1, the assembled state of the piston element (4) is provided. The male part (3) connected with the female part (1) forms the piston element (4). The sealing member (2) is positioned between the male part (3) and the female part (1). As seen in FIG. 2, the screwed end (8) is formed on the male part (3). The sealing member (2) is positioned between the female part (1) and the male part (3).
The assembly protrusion (5) on the sealing member (2) is mounted on the inner side of the female part (1). As seen in FIG. 3, the assembly protrusion (5) on the sealing member (2) is mounted into the sealing member housing (6) inside the female part (1). The male part (3) is screwed to the inner slot (7) of the female part (1), via the screwed end (8). Since the sealing member (2) is screwed along with the male part (3) through the female part (1), a stronger structure is obtained. The piston ring space (9) is formed by the combination of the female and male parts (1, 3). The piston ring (2), which is assembled along with the female part (1), is positioned on the piston ring space (9).

Alternative Embodiments

On the other hand, in positioning the piston ring (2) between the male and the female elements (1, 3), the assembly protrusion (5) on the piston ring (2) may also be mounted and screwed in a piston ring housing (6) possible to be formed on the male element (3).
The invention may not be limited to the representative embodiments provided in this section. The alternative embodiments that may be developed by the persons skilled in the art based on the fundamental components within the protective scope as set forth in the claims will mean the violation of the invention.

Claims

1. A system comprising a piston element made of a single piece, a part of a gas-operated shotgun enabling the shotgun to operate, and a piston ring assembled into the slots on the piston element, said piston element comprising:

at least one female part connected with at least one male part, forming the piston element, in order to provide the piston element to be formed by screwing two parts to each other and positioning the piston ring between the same,

at least one sealing member positioned between the male and the female part.

2. The system according to claim 1, comprising at least one sealing member housing formed on the inner surface of the female part.

3. The system according to claim 1, comprising at least one screwed end formed on the male part.

4. The system according to claim 1, comprising at least one assembly protrusion formed on the sealing member, in order to be assembled into the sealing member housing inside the female part.

5. The system according to claim 1, comprising:

at least one piston ring space formed by the combination of the female part and the male part; and

at least one piston ring mounted and secured inside the female part on the piston ring space.

6. The system according to claim 1, wherein the piston element is made up of two parts, and said piston element comprises at least one piston ring positioned between these two parts.

7. A piston element, comprising:

at least one sealing member positioned between the male and the female part.

8. The piston element according to claim 7, comprising at least one sealing member housing formed on the inner surface of the female part.

9. The piston element according to claim 7, comprising at least one screwed end formed on the male part.

10. The piston element according to claim 7, comprising at least one assembly protrusion formed on the sealing member, in order to be assembled into the sealing member housing inside the female part.

11. The piston element according to claim 7, comprising:

12. The piston element according to claim 7, wherein the piston element is made up of two parts, and said piston element comprises at least one piston ring positioned between these two parts.