Dispensing – With discharge assistant – Movable or conveyer-type trap chamber
Patent
1979-08-29
1982-05-25
Scherbel, David A.
Dispensing
With discharge assistant
Movable or conveyer-type trap chamber
137204, 222362, 222484, 222542, B01D 5304, F16T 145, F16K 2404, G01F 1116
Patent
active
043312683
ABSTRACT:
In a drain device for purging compressed air lines of water, oil, sludge, and other contaminants by the alignment of a first pair of apertures in a valving mechanism to allow the contaminants to enter a central chamber and periodically moving the central chamber to align a second pair of apertures to allow the contaminants to flow from the chamber, a pair of seals are provided for sealing each of the pairs of apertures. One seal is concentric with the one aperture in order that, with the apertures aligned, the seal will prevent leakage into or from the interior of the housing. A second seal encircles the first seal and extends radially away from the first seal in a direction coincident with the movement of the chamber portion which causes misalignment of the apertures. Accordingly, the second seal prevents escape of contaminants from the misaligned apertures while the first and second seals cooperate in the misaligned mode to prevent communication of the two apertures.
REFERENCES:
patent: 397854 (1889-02-01), Green et al.
patent: 3109443 (1963-11-01), Mastis
patent: 3295546 (1967-01-01), Carlton
patent: 3936031 (1976-02-01), Berman
patent: 4135542 (1979-01-01), Chisholm
Jacobson Harvey B.
Scherbel David A.
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