Freezeproof breather valve

Details Freezeproof breather valve Freezeproof breather valve

1976-08-02

1978-05-30

Nilson, Robert G.

Fluid handling

With heating or cooling of the system

With electric heating element

137469, 1374937, 137526, 137527, 13753325, 251 65, 251144, 251368, F16K 17194

Patent

active

040918378

ABSTRACT:
A valve for controlling the pressure within a tank to prevent excessive above or below atmospheric pressure conditions, including a pressure responsive valve and a vacuum responsive valve, wherein each valve includes a pallet with seals and blowdown rings of polytetrafluorethylene material, which is commercially marketed under the trademark Teflon. The pressure pallet includes guide means having Teflon parts, while the vacuum responsive valve includes hinge means having coacting Teflon parts. The breather valve includes structure defining a vertically extending vent structure having an opening arranged alongside the tank in which the valve is mounted, which opening is positioned to avoid being sealed by any normal buildup of ice and snow.

REFERENCES:
patent: 471615 (1892-03-01), King
patent: 1918807 (1933-07-01), Glab
patent: 2226022 (1940-12-01), Shutts
patent: 2556557 (1951-06-01), Schweitzer
patent: 2732856 (1956-01-01), Jurs et al.
patent: 3294115 (1966-12-01), Koenigsberg
patent: 3598145 (1971-08-01), Wolfson
patent: 3658085 (1972-04-01), Cannella

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