Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1989-10-12
1991-01-29
Rosenthal, Arnold
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251334, 277138, 277176, 277190, F16K 136
Patent
active
049880756
ABSTRACT:
For the sealing of valves or flanges, particularly used in vacuum technology, two opposed sealing surfaces are arranged at a main flange, on which a sealing element can be brought to rest, which is in the form of a cup spring and which is adjustable in the axial direction. In order to perform this operation with a smaller closing force, the cup spring is arranged in the space between the axially movable ring of a smaller diameter and a washer of greater diameter. The washer is radially outwardly and inwardly deformable, in an elastic manner, and the radial length of the cup spring is selected, so that when the seal is open, the cup spring is wedged within the space and when the seal is closed, it rests on the main flange in a nearly parallel position on a radius line with the seat of the seal.
REFERENCES:
patent: 1654516 (1927-12-01), Wilson
patent: 1965273 (1934-07-01), Wilson
patent: 3970281 (1976-07-01), Heeb
patent: 4244557 (1981-01-01), Leybold-Heraeus
patent: 4318532 (1982-03-01), Balzers
patent: 4627599 (1986-12-01), Schertler
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