Method of making slide valves with tappets and the slide valves

Details Method of making slide valves with tappets and the slide valves Method of making slide valves with tappets and the slide valves

1992-09-10

1994-03-15

Cuda, Irene

Metal working

Method of mechanical manufacture

Valve or choke making

29890127, 13762569, B23P 1500

Patent

active

052936856

ABSTRACT:
A tappet for slide valves, in particular for pneumatic multi-way valves, is generally made of steel and has a basic cylindrical shape with control segments located on the basic cylindrical shape and with smaller-diameter intermediate segments, whereby control edges are formed at the transitions between the segments. To be able to manufacture a lightweight tappet using more economical methods, the tappet body is made of plastic and is hollow all the way through, the outer control segments and the smaller-diameter segments between the outer control segments have wall thicknesses which are equal for each type of segment, and the plastic comprise polyoxymethylene or polyamide with a proportion of fillers.

REFERENCES:
patent: 3472281 (1969-10-01), Chiba et al.
patent: 3477472 (1969-11-01), Mercier
patent: 3762443 (1973-10-01), Sorenson
patent: 3844531 (1974-10-01), Grengs
patent: 3976103 (1976-08-01), Ostic
patent: 4337797 (1982-07-01), Caruso
patent: 4388949 (1983-06-01), Bonney
patent: 4705058 (1987-11-01), Marklew
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patent: 5123450 (1992-06-01), Wood et al.
Dipl.-Ing. Hans F. Meyer; Fluid; "Keramik und Kunststoff im Kommen"; 1988; pp. 38 and 43.
Du Pont de Nemours (Deutschland) GmbH, D-4000 Dusseldorf 30; Technica; "Teflon schutzt Kugelventil"; Oct. 1987; p. 63.

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