Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1980-07-23
1981-12-15
Cline, William R.
Fluid handling
Line condition change responsive valves
Direct response valves
13754317, F16K 1506
Patent
active
043054250
ABSTRACT:
There is disclosed an improved check valve for operation under light pressure, as in the oral inflation of inflatable articles. The valve has a valve body and a valve element reciprocable therein, the valve element having a body which carries an annular sealing means cooperating with and selectively sealing an axially outwardly converging valve seat having the shape of part of a sphere. The valve body and the valve element are substantially shorter than those of the prior art over which it is an improvement; the means for guiding the forward or outer end of the valve element remote from the valve seat and the sealing means has pronounced clearance with respect to the axial passage through the valve body, thereby permitting appreciable tipping of the valve element relative to the valve body, the sealing means effecting a seal with the valve seat in any position of the valve element in which it may be tipped relative to the valve body. The seat for the axially inner end of the coil compression spring which urges the valve element toward valve-closed position is formed by a plurality of circumferentially thin radially projecting fingers which provide a much larger effective area of flow of fluid through the valve than the formerly employed continuous annular flange. The valve seat on the valve body is partially isolated from the body proper of the valve, so that distortion of the valve seat by pressure applied to the valve outwardly thereof is minimized.
REFERENCES:
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patent: 3590851 (1971-07-01), Bogossian et al.
patent: 3800824 (1974-04-01), Medina
patent: 3878861 (1975-04-01), Pareja
patent: 4129145 (1978-12-01), Wynn
Keller James H.
Mackal Glenn H.
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