Gas separation – Combined or convertible
Patent
1997-08-06
2000-02-15
Woo, Jay H.
Gas separation
Combined or convertible
553854, 312114, B01D 2900
Patent
active
060247754
ABSTRACT:
A substantially sealed case for enclosing objects has at least one openable surface and an inlet-outlet port through a surface of the case, permitting the ingestion and expulsion of air during case thermal expansion and barometric pressure changes. The inlet-outlet port has an inlet passage and an outlet passage therethrough, with a check valve in the inlet passage permitting ingestion of air into the case through an inlet filter and blocking the expulsion of air therethrough. The inlet-outlet port also has a check valve in the outlet passage permits the expulsion of air from the case through an outlet filter and blocks the ingestion of air therethrough. A flexible membrane bag encloses the inlet and outlet filters, and may optionally include air treatment means for controlling the relative humidity and the oxygen content of air in the bag.
REFERENCES:
patent: 1642577 (1927-09-01), Carson
patent: 3148956 (1964-09-01), Hetherwick et al.
patent: 4666479 (1987-05-01), Shoji
patent: 4938750 (1990-07-01), Leise, Jr.
patent: 4951555 (1990-08-01), Hahn
patent: 4957518 (1990-09-01), Brassell
patent: 5127718 (1992-07-01), Paine
Leverett, IBM Technical Disclosure Bulletin, "Fast Response Gas Buffer for Glove Box", vol. 20, No. 12, May 1978.
Miller Jack V.
Miller Ruth Ellen
Pham Minh-Chau T.
Woo Jay H.
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