Choke key for sports firearms

The invention relates to a choke wrench, with the features of claim 1.

In practice, choke wrench needed to chokes in shotgun barrels of Hunting and / or sports weapons to replace.

Depending on the desired shot pattern scatter are chokes with one different Chokebohrungen in the muzzle and / or unscrewed, including a substantially cylindrical adapter is provided which with the Wechselchoke is engaged. The rotary motion is usually with a bolt transverse to the Adapter axis is disposed, and serves as a handle, carried out.

The Wechselchoke is removed or added to with the fingers of the muzzle. This process repeats itself especially common in sports weapons to the adjust arise.

Moreover choke wrench are known which comprise a rigid guide pin that the adapters are arranged upstream. Whose diameter corresponds to that of the smallest Wechselchoke inner diameter.

The common choke wrench their design, requires a relatively large clearance between Chokes and adapter. This leads to increased wear and is not he wishes.

There are further choke wrench known that to an adapter a spreading have held centering upon insertion into the Wechselchoke there. (US Patent 49 51 409 and "Krieghoff-in chokes for shotgun barrels" in DE-catalog Frankonia Jagd Würzburg 1996/97 page 88).

The Wechselchoke remains for storage and / or substituted in the muzzle on the spreader.

In Chokeschlüsseln these observations, the exchange capacity is different Chokes restricted lack storage space. For further use However, the Chokeschlüssels for receiving another chokes is no Spreading available; the prerecorded Wechselchoke can neither slide still entfer without the aid of their hands are nt.

The object of the invention to provide a choke wrench for muzzle flush chokes create to facilitate the frequent replacement.

Another object is to play existing between choke wrench and Wechselchoke, for optimum fit to minimize.

These objects are achieved by the choke wrench with the features of the claims 1 and 4 is released.

This choke wrench, the handle is formed anatomically formed what Handling compared to known solutions improved, in which a bolt as Handle is used.

The adapter in the handle is exchangeable, what the scope a corresponding Chokeschlüssels, enlarged at different Chokeherstellern.

The choke wrench has an adapter Subordinated spreading that is held by spring force in the centering Wechselchoke; existing play between Choke wrench and Wechselchoke is compensated.

This enables damage-free replacement, in particular of thin-walled Chokes.

Incidentally, it is possible, the polluted and / or hot by the use of transport Wechselchoke with the choke wrench. The in the Wechselchoke introduced spreading fixed it both to the exchange as well as the Transport. Touches of chokes with fingers, as in the conventional Chokeschlüsseln necessary are avoided.

An advantageous embodiment of the invention enables the choke wrench on disassemble easiest way to save space to transport him.

Further developments of the invention are the subject of dependent claims. The drawing shows an embodiment of the invention is shown.

Show it:

<b>Fig.</b> 1 a choke wrench in the front view and in half section,

<b>Fig.</b> 2 the choke wrench to <b>Fig.</b> 1 in top view, and

<b>Fig.</b> 3 the choke wrench to <b>Fig.</b> 1 in front view and half-section, in Arrangement with shotgun barrel and Wechselchoke shown in full section.

As in <b>Fig.</b> shown 1, the choke wrench has a handle <b>1</b> with a cured adapter <b>2</b> for muzzle flush chokes on that with grub screws <b>10</b> in the grip <b>1</b> is screwed.

The adapter <b>2</b> is applicable manner that its drive cam in a Wechselchoke can intervene and it accommodates a spreader.

The cylindrical clamp rod <b>6</b> the spreading device is formed by a hole in the center the grip <b>1</b> guided axially. The tension rod<b>6</b> by means of a detachable screw push button <b>5</b> and a tightly bolted expansion cone <b>4</b> limited.

Pushbutton side, the tension rod <b>6</b> by a compression spring <b>8th</b> surrounded partially in adapter <b>2</b> is arranged sunk.

Between the expansion cone <b>4</b> and the adapter <b>2</b> the tensioning rod <b>6</b> on connecting piece <b>3</b> and a backstop <b>9</b> at whose tubular ends an O-ring <b>7</b> is arranged. The counter-holder<b>9</b> and the intermediate piece <b>3</b> are on the tie rod <b>6</b> around its longitudinal axis is rotatably supported.

The intermediate piece <b>3</b> additionally has at its end an expanding cone adapter side on.

For expanding the O-rings <b>7</b> the chucks <b>4</b>. <b>3</b> serves spring force to that of feather <b>8th</b> produced and axially on the tie rod <b>6</b> Gets transferred.

The choke wrench is in <b>Fig.</b> 2 illustrated in plan view and has the anatomical shape of the handle <b>1</b> out.

<b>Fig.</b> 3 shows in the shotgun barrel <b>12</b> introduced Wechselchoke <b>11</b> in engagement with the Choke wrench.

The choke wrench described so far operates as follows: Assuming that a Wechselchoke <b>11</b> the shotgun barrel <b>12</b> is detachably screwed, to be replaced, the push button <b>5</b> by thumb pressure against the grip <b>1</b> pressed. Here, the spring<b>8th</b> compressed and the tension rod <b>6</b> simultaneously moved axially.

The distance between the chucks <b>4</b>. <b>3</b> and the respective retainers <b>9</b> increased and the prestressed O-rings <b>7</b> can the conically tapered end of the chucks <b>4</b>. <b>3</b> out relax.

It decreases its outer diameter and the choke wrench is relaxed. The spreader is in the Wechselchoke <b>11</b> introduced and the adapter <b>2</b> engages with its drive cam in the guides of the chokes <b>11</b> on.

By releasing the push button <b>5</b> compresses the spring <b>8th</b> against pushbutton <b>5</b> and the Spring force moves the tie rod <b>6</b> and chucks <b>4</b>. <b>3</b> in their original Position.

This causes the above-mentioned O-rings <b>7</b> by the invading chucks <b>4</b>. <b>3</b> be widened until they fixed on the inner wall of the chokes <b>11</b> rest. The choke wrench is thus in Wechselchoke <b>11</b> firmly centered and clamped. Means clockwise rotation of the handle <b>1</b> is the Wechselchoke <b>11</b> from the shotgun barrel <b>12</b> unscrewed.

The Wechselchoke <b>11</b> after leaving the shotgun barrel <b>12</b> continue on the Choke wrench fixed.

A drop takes place, in which the push button <b>5</b> is pressed again and thus to - As described above - relaxation of the O-rings come.

With vertically held choke wrench the Wechselchoke slides <b>11</b> of the Spreading to from storage.

A newly to be introduced in the course Wechselchoke can be taken immediately. The easy handling a changing and transporting as a whole optimized.