Anaerobic cabinets and systems

Details Anaerobic cabinets and systems Anaerobic cabinets and systems

1997-07-01

1999-01-19

Redding, David A.

Chemistry: molecular biology and microbiology

Apparatus

Including condition or time responsive control means

4353032, 312 1, 454 57, 600 22, 422104, C12M 300

Patent

active

058613056

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION

This invention relates to anaerobic cabinets and systems such as used or intended for use in microbiology laboratories.
Requirements for anaerobic cabinets can vary widely according to the amount and types of work to be done at any particular location in relation to anaerobic organisms. It is customary for established manufacturers and suppliers of anaerobic cabinets, such as ourselves, to offer different sizes of cabinets, and appropriate variations of related facilities such as cabinet loading and unloading by way of means individual to each cabinet, also provision of access ports typically in pairs equipped with arm-tubes, whether arm-sealing for bare-hands use or as glove-tubes.
It is a general object of this invention to assist providing users of anaerobic cabinets with greater flexibility, versatility and economy of operating such cabinets, whether on an individual or on a more systematic basis.
Prior references drawn specifically to our attention include patent specifications U.S. Pat. No. 4,262,091 concerning filling petri dishes with culture medium in oxygen-free atmosphere of a central one of three anaerobic cabinets each having arm-tube manipulation access and communication passageways between them for empty petri dishes from left or right one of the anaerobic cabinets and filled petri dishes to right or left one of the anaerobic cabinets which can be separated from the communication provisions; EPA 411,794 concerning achieving low-hydrogen atmospheres in anaerobic cabinets by nitrogen and/or carbon dioxide to a standard gas mixture further including hydrogen, providing sealing bungs in ends of "bare-hands" type arm tubes, and providing nitrogen inflatable outer door seals for lock-type access provisions to one end of the main cabinet chamber; U.S. Pat. No. 4,111,753 concerning use of controlled anaerobic atmosphere transport units that dock with lock-type access provisions of anaerobic cabinets in bringing specimens for loading thereto and subsequent manipulation using gloved arm-tubes; and GB 2,174,714 for an anaerobic cabinet system having specimen entry from an end lock-type access unit to a main manipulation and thence to a compactly packed nurture chamber. Compared with such systems aspects and embodiments of this invention afford particular advantages, including relative to lock-type access provisions, particular at manipulation porting and/or shared by at least two cabinets.
According to a first aspect of this invention, there is provided an anaerobic cabinet or system in which each anaerobic cabinet comprises an enclosure with means for providing for all of visibility of its interior from outside, inducing and maintaining prescribed low-oxygen internal atmosphere, controlled lock-type access for manual introduction and removal of items, and hand/arm access port provision for manipulation of said items in the cabinet, the lock-type access including door provisions at least at said port provision affording an in-port chamber for loading and/or unloading appropriate items to and from the chamber through the port/door provisions.
According to a second aspect of this invention, there is provided an anaerobic cabinet or system in which each anaerobic cabinet comprises an enclosure with means for providing for all of visibility of its interior from outside, inducing and maintaining prescribed low-oxygen internal atmosphere, controlled lock-type access for manual introduction and removal of items, and hand/arm access port provision for manipulation of said items in the cabinet, the lock-type access comprising an access lock unit having first access provisions for said introduction/removal of items and other access provisions capable of individually servicing at least two cabinets each with its own cooperating cabinet access provisions relative to such then shared lock-type access unit.
Such a system is conveniently implemented as a central or medial lock provision between first and second cabinet extensions to left and right, respectively. Access to the system can be from front or

REFERENCES:
patent: 3536370 (1970-10-01), Evans
patent: 4111753 (1978-09-01), Folsom
patent: 4262091 (1981-04-01), Cox
patent: 4336329 (1982-06-01), Hesse
patent: 4892830 (1990-01-01), Findley et al.
patent: 5257957 (1993-11-01), Diccianni et al.
patent: 5259812 (1993-11-01), Kleinsek
patent: 5599398 (1997-02-01), Lenglen

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