Gas separation – With separating media bypass or system gas pressure relief – Valved bypass means
Patent
1988-07-29
1989-09-05
Spitzer, Robert
Gas separation
With separating media bypass or system gas pressure relief
Valved bypass means
55320, 553856, 55387, 55486, 55502, 55503, 360 9702, B01D 4612, B01D 5304
Patent
active
048634999
ABSTRACT:
An anti-diffusion chemical breather assembly for disk drives having a body portion (20), a cover portion (40), and a filter media (50), including a layer (51) impregnated with activated charcoal granules (53). When assembled, the body portion (20) and cover portion (40) define therebetween a sealed tortuous passage 15 which provides fluid communication between external environment and a hard disk drive interior when the apparatus is positioned in a receiving cavity of a hard disk drive. The tortuous passage limits the rate of moisture entry into the disk drive unit.
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Microcontamination, pp. 41 et seq. (Apr. 1987).
Donaldson & Company, Inc.
Spitzer Robert
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