Receptacles – Closures – With condition responsive vent or valve
Patent
1978-07-31
1980-01-29
Shoap, Allan N.
Receptacles
Closures
With condition responsive vent or valve
220303, 220DIG32, B65D 5116
Patent
active
041857518
ABSTRACT:
A radiator cap for a vehicle cooling system of a basically closed type includes a first valve which is open when the interior of the radiator is at atmospheric pressure, and remains open until fluid flow out of the radiator closes it. A second, or overpressure, valve in the radiator cap functions to vent the radiator only if potentially damaging excessive pressure exists within the radiator. The normal operating pressure range of the radiator is between the closing pressure of the first valve and the opening pressure of the second valve. When a low vacuum exists within the radiator, the first valve opens, permitting a metered flow of liquid coolant from a coolant recovery bottle back into the cooling system radiator. When a high vacuum is present within the radiator, the first valve opens further to permit higher flow rates of coolant back into the radiator.
REFERENCES:
patent: 2406502 (1946-08-01), Lines
patent: 2582209 (1952-01-01), Smith et al.
patent: 2732971 (1956-01-01), Holmes
patent: 3102660 (1963-09-01), Bowden
patent: 3164288 (1965-01-01), Boomgaard
patent: 3715049 (1973-02-01), McMullen et al.
patent: 3878965 (1975-04-01), Crute
Evans John H.
Moore Phillip L.
Shoap Allan N.
Stant Manufacturing Company, Inc.
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