DE29716692U1 - Chisel for mining mineral substances - Google Patents

Description

Company Michael Komotzki, Gernotstr. 4, 44319 Dortmund "Chisels for mining mineral substances"

The innovation relates to a chisel for mining minerals

lic substances according to the preamble of the main claim.

Such chisels are known, for example from US-PS 3 833 264 or DE 34 01 243 C2, and have on their shaft essentially the entire length of the

The tool has ribs extending along the shaft to drain the cuttings released by the chisel, usually mixed with water. These ribs guide the cuttings to the end of the chisel shaft facing away from the chisel head, where they can escape into the open air.

The chisels are held in the chisel pocket by a clip ring holder, i.e. on the lower end of the chisel shaft a clip ring groove is machined which holds the clip ring, i.e. a spring ring, whereby this spring ring is an open ring,

which can be compressed so that it can engage in the chisel pocket and then expand in the area of a groove provided in the chisel pocket, whereby the actual chisel is held.

It must be prevented that debris collects between the inner side of the clip ring and the clip ring groove and, for example, after a long period of downtime, cakes together so tightly that it is no longer possible to press the clip ring in.

On the other hand, the manufacture of the chisel shaft with the ribs or spirals running along them is costly, whereby when using straight ribs it is known that these ribs can be extended outwards via the clip ring groove to the

To extend the end of the chisel shaft facing away from the chisel head.

The innovation is based on the task of creating a chisel of the generic type that has a smooth chisel

shaft, i.e. it does not have ribs, webs, turns or the like and still ensures that the cuttings are adequately removed from the clip ring groove.

This task underlying the innovation is carried out by the

Doctrine of the main claim resolved.

According to an advantageous embodiment of the innovation, it is provided that the dirt drainage channel increases in size from the deepest part of the clip ring groove towards its free mouth.

This arrangement creates a chisel that is inexpensive to produce and ensures perfect cleaning of the cuttings that enter the space between the chisel shaft and the clip ring, thus preventing any

Cutting debris remains which could cause an obstruction when releasing the chisel.

An example of the innovation is explained below using the drawing.

Fig. 1 shows a view of the new

Chisel and

Fig. 2 shows a slightly larger scale section through

the clip ring groove.

The drawing shows a chisel 1 which has a chisel head 2 and a chisel shaft 3. The chisel head and chisel shaft are one piece and a clip ring groove 4 is provided at the end of the chisel shaft, into which a clip ring 5 fits.

which is designed as an open ring, as shown in the drawing

clearly shows that when pressure is applied to the outside of the clip ring, a reduction in the outer diameter
of the clip ring is accessible. In the chisel pocket (not shown) a groove is cut out which is adapted to the clip ring groove 4 and into which the outside of the clip ring 5 can engage.

In principle, the outer diameter of the outermost end of the chisel shaft 3 expands again to the outer diameter of the chisel shaft 3, thereby forming the clip ring groove 4.

To remove any dirt that may collect in the clip ring groove 4

Schrämkleins, which is often mixed with water, is a
Dirt drainage channel 6 is provided, which covers the lower edge of the
Clip ring groove 4 breaks through so that when the actual chisel 1 moves, the cuttings can be removed here.

The dirt drainage channel 6 expands, as shown in Fig. 2

from the diameter of the clip ring groove 4 to the center
of the chisel shaft, so that an oblique design of the dirt drainage channel 6 is achieved, ie the dirt drainage channel 6 increases in size towards the outside, whereby the removal of the cuttings is definitely improved.

Claims (2)

HABBEL & HABBEr ^: '"'^'p^-'inq. h.-q. habbel PATENT ATTORNEYS DIPL.-INQ. LUTZ HABBEL EUROPEAN PATENT ATTORNEYS PO Box 3429 ♦ 48019 Münster DIPL.-QEOQR. PETER HABBEL TELEPHONE (0251) 535 780 ♦ FAX (0251) 531 996 OUR FILE: (please specify] K92/20111 X/SC Münster. 16 September 1997 Company Michael Komotzki, Gernotstr. 4, 44319 Dortmund "Chisel for mining mineral substances"
Protection claims: 1. Chisel for mining mineral materials with a chisel head and a chisel shaft that can be inserted into a chisel pocket, which has a clip ring groove in the area of the shaft end into which a clip ring engaging in a groove in the chisel pocket can be inserted is characterized in that the clip ring groove (4) has one or more dirt drainage channels (6) which extend from the interior of the clip ring groove (4) to the side of the chisel shank end facing away from the chisel head. HOUSE ADDRESS: AM KANONENORABEN 11 ♦ D-48151 MUNSTER 32*- 2. Chisel according to claim 1, characterized in that the dirt drainage channel (6) increases in size from the deepest part of the clip ring groove to its free mouth.