Disc cabinet recirculating air flow system
AssigneeMicrodata Corporation
InventorClarence O. Kulma
Life of this patent
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Abstract
An axially symmetrical, self-pressured air system has a substantially sealed enclosure for high speed rotating discs. Air admission to the enclosure is located such that pressures throughout the enclosure minimize the entrance of contaminants. A tangentially positioned chamber can be symmetrically arranged about a tangent in the cylindrical wall of the enclosure. Filters adjacent both the axial receiving means and the tangential chamber rid the enclosure of disc damaging impurities.
Claims20
An air pressure control system for a cabinet for rotatable discs, comprising:
- a disc cabinet having a generally cylindrical shaped interior wall defining an axis and partially defining a cabinet interior, the wall being adapted to surround at least one disc, and a top cover joined to said interior wall and a bottom cover joined to an opposite portion of said interior wall, wherein said top cover defines a first volume of space between the uppermost of said at least one disc and said top cover, and wherein said bottom cover defines a second volume of space between the lowermost of said at least one disc and said bottom cover;
- rotating means for rotatably mounting and spinning said at least one disc coaxially within said cylindrically shaped interior wall, said rotating means including a rotating means opening in said cabinet through which opening said rotating means may enter said interior;
- and
- air inlet means for admitting air from outside the cabinet into said interior, said air inlet means including an air inlet means opening positioned opposite said disc from said rotating means opening in said cabinet;
- wherein the ratio of said first volume to said second volume is predetermined to maintain air pressure in said interior adjacent said rotating means opening, higher than ambient air pressure when said at least one disc is rotated.
A recirculated air control system for a rotating disc cabinet, comprising:
- (a) a disc cabinet having a generally cylindrically shaped interior wall having an axis and partially defining a cabinet interior adapted to enclose at least one disc mounted to spin on a spindle about said axis;
- (b) an opening in said interior wall exposing the interior to a tangential chamber;
- (c) a plenum chamber positioned adjacent said tangential chamber and adapted to receive from and to return to said tangential chamber, air from the interior;
- (d) an inlet air conduit and an outlet air conduit connecting said tangential chamber and said plenum, said inlet and outlet air conduits having openings relative to the interior substantially equidistant from the point of tangency;
- and
- (e) wall ramp means for creating a directed flow of the air expanding from the interior into the tangential chamber across the opening for said inlet air conduit.
Dependencies are inferred from the claim text.