Self-venting drain assembly

Details Self-venting drain assembly Self-venting drain assembly

1985-10-07

1988-02-09

Sever, Frank

Liquid purification or separation

Structural installation

Grated inlet surface drain

210472, B01D 3500

Patent

active

047240741

ABSTRACT:
A drain assembly uses a valve body with a drain passage and a vent passage in order to provide self-venting drainage of a collection bowl mounted to a filter unit. The valve body cooperates with a seal such that the drain passage is opened before the vent passage, thereby insuring proper operation of the passages. Additionally, the valve body draws air into a cavity within the seal, thereby inherently clearing an upper vent port of fluid prior to opening of a vent port disposed at the upper end of the vent passage.

REFERENCES:
patent: 732122 (1903-06-01), Schneider
patent: 1938988 (1933-12-01), Wallace
patent: 2036990 (1936-04-01), De Faveri
patent: 3207190 (1965-09-01), Sibereis et al.
patent: 3211194 (1965-10-01), Projahn
patent: 3540402 (1970-11-01), Kocher
patent: 3606096 (1971-09-01), Campbell
patent: 3727638 (1973-04-01), Zaremba, Jr. et al.
patent: 4314689 (1982-02-01), Wilson
patent: 4440193 (1984-04-01), Matheson
patent: 4502956 (1985-03-01), Wilson et al.

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