Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1998-03-06
1999-11-16
Michalsky, Gerald A.
Fluid handling
Line condition change responsive valves
Direct response valves
1372162, 13753331, F16K 2400
Patent
active
059839295
ABSTRACT:
An air valve that comprises a concave, downwardly facing cover (4) which is carried by a pipe connector (1) connected generally coaxially thereto, wherein the upper edge-part of the pipe connector (1) is surrounded by the wall of the cover (4), a ring-shaped, upwardly facing first seat ridge (8) which is carried by and sealingly connected to the cover wall (5), a second ring-shaped seat ring (2) which is generally coaxial with the cover wall (5) and is carried by and sealingly connected to the upper end-part of the pipe connector (1), and a valve plate (11) which is vertically movable in the cover (4) and which carries an annular, rubber-elastic valve washer (20) that can rest sealingly on the first and the second seat ridges (8, 2) so as to bridge an annular air through-gap between the seat ridges. Both main surfaces of the valve washer (20) have a surface roughness which is adapted to substantially avoid strain in the outer layers of said main surfaces.
REFERENCES:
patent: 3923081 (1975-12-01), Persson
patent: 4436107 (1984-03-01), Persson
AB Durgo
Michalsky Gerald A.
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