Fluid handling – Convertible – Reversible check
Patent
1977-09-22
1979-09-11
Rosenthal, Arnold
Fluid handling
Convertible
Reversible check
251 88, 251333, 251357, F16K 148
Patent
active
041671953
ABSTRACT:
A straight compression valve is disclosed in which shutoff of flow of fluid is effected between surfaces of plastic material, but in which a washer of non-metallic material may be employed under certain conditions. When the washer is not used, the design of the sealing surfaces is such as to obtain a highly effective shutoff with a minimum of closing pressure, while avoiding breakage of parts of the valve adjacent the sealing surfaces. Means are provided for controlling the movement of the valve stem to prevent breakage of the valve bonnet and other parts during closing of the valve. The valve body is provided with flats or flat surfaces which are so disposed or positioned in relation to the valve as a whole as to enable the valve to be clamped in a vise for facilitating access to the stem and other parts of the valve. The use of packing glands is avoided through the use of an O-ring and its structural location in the valve.
REFERENCES:
patent: 2121315 (1938-06-01), Black
patent: 2194961 (1940-03-01), Walker
patent: 2272351 (1942-02-01), Polcari
patent: 2936776 (1960-05-01), Veatch
patent: 3123337 (1964-03-01), Peras
patent: 3892383 (1975-07-01), Hesse
patent: 3904174 (1975-09-01), Giese
Rosenthal Arnold
U-Brand Corporation
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