Untitled record

The invention is a Kolbe nschilber that can be made of any materials for any purpose, but which is mainly intended for such applications, in which corrosion-resistant materials such as graphite; impregnated carbon, ceramics or plastics must be used.

In the piston valve according to the invention, the seal between piston skirt and bore is effected by the fact that two cuffs are pushed onto the shaft, the spread is caused by a likewise pushed onto the shaft sleeve. For this purpose, the shaft is provided on its spindle side with a threaded sleeve, and this sleeve presses the sleeves with the sleeve against a collar on the other shaft end.

Such a piston valve is illustrated by the drawing. The slider block i made of impregnated carbon carries the bore yes for the inflow and the hole ib for the drainage of the medium to be shut off. Also, the piston skirt 2 in the bore yes consists of impregnated carbon, as well as the sleeve 3, while the -NSanschetten 4a and 4b, which represent the natural sealing bodies, aas elastic material, for example, a mixture of rubber and Graphite, are made. On the shaft, the sleeve 5 is screwed; by the screw pressure, the lower sleeve 4b is pressed against the collar 211 at the lower end of the shaft, and the spreading of the two cuffs are close to the shaft and bore. Re-gaskets can be made possible by providing the bore with projections on which the lower sleeve rests in the Schlidstellung of the slider, most simply in such a way that one chooses the drill down a little narrower.