DE1189477B - Bolt-firing device - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B25c

German class: 87 a-18

Number: 1189 477

File number: 1134491 c / 87 a

Filing date: July 8, 1957

Opening day: March 18, 1965

The invention relates to a bolt-firing device, with the bolt z. B. be shot in masonry.

The problem with bolt-firing tools is that the firing force is adapted to different conditions must become. With soft masonry and short bolts, a relatively small force is sufficient, while when a long bolt is to be shot into concrete, for example, a great force and thus a high bolt exit speed is required.

This problem is solved in two ways. One method uses cartridges different charges used, d. H. the explosion pressure is essentially determined by the Powder quantity determined. The main disadvantage of this process is that it is always different Cartridges must be carried and kept in stock. The other method works with uniform cartridge strength. The explosion pressure is determined by the different sizes of the Combustion chamber varies. It is also possible to combine both methods and at the same time To vary cartridge load and explosion space.

In a known bolt-firing device that works with a variable size of the explosion space are Several insert sockets of various lengths are included with each powder-actuated tool. With this device results the disadvantage that the replacement of the sockets can be made more difficult because of the Wall of the hole in which the socket is to be inserted, knock off powder residues, thereby preventing the insertion a longer socket than previously used is made more difficult.

The invention is based on the object of providing a bolt-firing tool of the type just described, So a bolt-firing device, which has several to regulate the muzzle energy of the bolt to be shot Optionally interchangeable bushes that can be inserted into the barrel from behind are assigned are, which contain the cartridge storage chamber, in front of a more or less large combustion chamber is arranged to be designed in such a way that operational malfunctions due to the precipitation of powder residues be avoided.

The bolt-firing device according to the invention of the type mentioned is characterized in that all Insert sockets are of the same length and the combustion chamber to be selected is connected to the Cartridge storage chamber subsequent, more or less large extension of the cartridge storage chamber A bolt-firing tool is formed up to the front end of the insert bushing extending axial bore

Applicant:

"Impex food"

Sales of tools G. m. B. H.,

Ansbach (MFr.), Dürrnerstr. 1

Named as inventor:

Benno Crones, Ansbach (MFr.)

is. In the case of the bolt-firing device according to the invention, all sockets have the same external dimensions. In this way, the described difficulties of the known bolt-firing device are avoided, since each Bush the hole in which it is inserted to the same extent, namely preferably completely, fills, so that where the insert sockets are in contact with the rear end of the barrel, no Powder residues can precipitate. Difficulties in changing the bushings are therefore completely avoided; Trouble-free operation of the powder-actuated tool is guaranteed.

An advantageous embodiment of the bolt-firing tool according to the invention is characterized in that that the widening of the insert socket is steplessly forward up to the original diameter the axial bore tapers, which is preferably equal to the diameter of the adjoining forward Barrel bore is. The combustion chamber is preferably designed in the shape of a hollow cone. This design of the combustion chamber creates corners in which powder residues can easily be found accumulate, and the combustion chamber is always kept clean.

In the drawing, an embodiment of the invention is shown. The drawing is a cut through the rear end of the device with the insert socket. The insert socket is denoted by 1; this is screwed into a corresponding recess in the rear barrel end 2 by means of the thread 3. The socket 1 is relatively long in relation to the actual cartridge store. Before the latter, it has an inner hollow conical recess 4, which the explosion space or a Extension of the same forms. It is readily apparent that a number of such insert sockets 1 this explosion space 4 different sizes

509 519/77

design and by inserting the respective socket, as described above, the explosive force and thus the depth of penetration of the bolt 5 can be regulated in the simplest way.

It should also be mentioned that the bushings can also be fastened in the barrel by other suitable means, whereby it must be ensured that they are easily exchangeable.

Claims (3)

Patent claims: 1. Bolt- firing device, which is assigned to regulate the muzzle energy of the bolt to be shot several, optionally interchangeable, in the barrel from the rear insertable sockets , which contain the cartridge storage chamber, in front of which a more or less large combustion chamber is arranged, as characterized by that all insert sockets (1) are of the same length and the combustion chamber to be selected by a more or less large extension (4) extending from the cartridge storage chamber to the front end of the insert socket (1) following the cartridge storage chamber (6) Axial bore (7) is formed. 2. bolt-firing device according to claim 1, characterized in that the extension of the insert socket forward steplessly up to the original diameter of the axial bore (7) tapers, which is preferably equal to the diameter of the barrel bore adjoining it to the front (8) is. 3. Bolt-firing tool according to claim 1 or 2, characterized in that the combustion chamber is formed by a hollow cone space (4). Considered publications:
Swiss Patent No. 302 644;
U.S. Patent No. 2,759,185. Legacy Patents Considered:
German Patent No. 1 024 448. For this purpose, 1 sheet of drawings 509 519/77 3.65 © Bundesdruckerei Berlin