US3710540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-purging disk system having air flow guide means
Assignee: Unisys Corp
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Filing: 1970-11-25
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Granted: 1973-01-16
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Expires: 1990-11-25
Abstract
Abstract A rotating magnetic disk is enclosed in a housing having at least one pair of ports. An external conduit having a filter therein interconnects the ports. The rotation of the disk imparts a velocity to the air adjacent to the disk faces and the interior of the housing provides an airflow guide which causes air from both sides of the disk to flow into a scoop disposed in one port and coupled to the conduit. Thus a high rate of air circulation through the conduit is achieved and the air is rapidly filtered.
Inventors
- 👤 A Stansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:38
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/021; B; B01; B01D; B01D45/00; B01D45/12; B01D45/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A system for filtering air surrounding a rotating disk comprising a housing for enclosing the disk, the housing having first and second ports, the first port being located in an end wall portion spaced away from a first face of the disk near its periphery, a scoop disposed in the first port for guiding air pumped by the rotation of the disk out of the housing, air flow guide means for folding air flowing adjacent to the second face over the edge of the disk into the scoop, a conduit connecting the scoop to the second port, and a filter within the conduit for collecting particles from air flowing through the conduit.
Claim 2
Independent Claim
112 words
A system for filtering air surrounding a rotating disk comprising a housing for enclosing the disk, the housing having first and second ports, the first port being located in an end wall portion spaced away from a first face of the disk near its periphery, a scoop disposed in the first port for guiding air pumped by the rotation of the disk out of the housing, air flow guide means for folding air flowing adjacent to the second face over the edge of the disk into the scoop, a conduit connecting the scoop to the second port, and a filter within the conduit for collecting particles from air flowing through the conduit.
Claim 3
Dependent Claim
57 words
The system according to claim 1 wherein the first and second ports are located in the same end wall portion of the housing and the second port is near the center of rotation of the disk whereby differences in static pressure between the air adjacent the periphery and near center increase the airflow through the connecting conduit.
Claim 4
Dependent Claim
73 words
The system according to claim 1 wherein the airflow guide means comprises a ramp on the interior surface of the housing adjacent to the second face and projecting inwardly toward the disk face along a circumferential direction, the ramp and the disk face defining a path which narrows in the direction of airflow thereby restricting circumferential airflow and producing a substantial airflow in a radial direction outward from the center of the disk.
Claim 5
Dependent Claim
249 words
In a rotating magnetic disk file self-purging system having a housing for the disk, a conduit connected between two ports in the housing and a filter in the conduit for filtering circulating air flowing because of the pumping action of the rotating disk; apparatus for causing air flowing on one side of the disk to fold over the disk edge and join air flowing on the other side where it can enter the conduit comprising a first ramp on the interior surface of the housing projecting inwardly toward a first face of the disk along a circumferential direction, the first ramp and the first face defining a narrowing path therebetween for the airflow thereby restricting circumferential airflow and causing a substantial spin-off of air in a radial direction outward from the center of the disk, a tongue on the interiOr surface of the housing projecting inwardly toward the edge of the disk in the area of the first ramp for guiding the air spun out of the edge inwardly along the second face of the disk, and a second ramp on the interior of the housing projecting outwardly away from the second face in the area of the tongue, the second ramp and the second disk face defining an enlarging path therebetween for air flowing in a circumferential direction whereby a static pressure differential is established between the air flowing adjacent the opposite faces of the rotating disk which increases the flow of air folding over the disk edge.
Claim 6
Dependent Claim
249 words
In a rotating magnetic disk file self-purging system having a housing for the disk, a conduit connected between two ports in the housing and a filter in the conduit for filtering circulating air flowing because of the pumping action of the rotating disk; apparatus for causing air flowing on one side of the disk to fold over the disk edge and join air flowing on the other side where it can enter the conduit comprising a first ramp on the interior surface of the housing projecting inwardly toward a first face of the disk along a circumferential direction, the first ramp and the first face defining a narrowing path therebetween for the airflow thereby restricting circumferential airflow and causing a substantial spin-off of air in a radial direction outward from the center of the disk, a tongue on the interiOr surface of the housing projecting inwardly toward the edge of the disk in the area of the first ramp for guiding the air spun out of the edge inwardly along the second face of the disk, and a second ramp on the interior of the housing projecting outwardly away from the second face in the area of the tongue, the second ramp and the second disk face defining an enlarging path therebetween for air flowing in a circumferential direction whereby a static pressure differential is established between the air flowing adjacent the opposite faces of the rotating disk which increases the flow of air folding over the disk edge.
Claim 7
Independent Claim
110 words
A system for filtering fluid surrounding a rotating mass, which comprises a housing enclosing the mass and having first and second ports, a scoop having a dish portion projecting into the housing through the first port, the dish having an entrance aperture bounded in part by a peeling edge for peeling off a portion of a boundary layer of fluid flowing as a result of pumping action of the rotating mass and for guiding such fluid away from the boundary and into the scoop, an external conduit connected between the scoop and the second port, and a filter within the conduit for filtering particles from fluid flowing through the conduit.
Claim 8
Independent Claim
110 words
A system for filtering fluid surrounding a rotating mass, which comprises a housing enclosing the mass and having first and second ports, a scoop having a dish portion projecting into the housing through the first port, the dish having an entrance aperture bounded in part by a peeling edge for peeling off a portion of a boundary layer of fluid flowing as a result of pumping action of the rotating mass and for guiding such fluid away from the boundary and into the scoop, an external conduit connected between the scoop and the second port, and a filter within the conduit for filtering particles from fluid flowing through the conduit.
Claim 9
Dependent Claim
47 words
A system according to claim 5, wherein the rotating mass is a rotating disk and wherein the housing has interior contour with a projection extending radially inwardly toward the rotating disk in the area adjacent to the scoop for guiding the flow of fluid into the scoop.
Claim 10
Dependent Claim
111 words
A rotatable magnetic disk file self-purging system comprising: a housing for the disk, the housing including end walls having a first port adjacent to the periphery of the disk and a second port adjacent to a center part of the disk; a conduit connected between the ports for returning to the second port air flowing out of the first port because of the pumping action of the disk; a filter in the conduit for collecting the particles; and means for folding air flowing from one side of the disk opposite the first port over the disk edge for joining air flowing on the other side where it can enter the conduit.
Claim 11
Dependent Claim
111 words
A rotatable magnetic disk file self-purging system comprising: a housing for the disk, the housing including end walls having a first port adjacent to the periphery of the disk and a second port adjacent to a center part of the disk; a conduit connected between the ports for returning to the second port air flowing out of the first port because of the pumping action of the disk; a filter in the conduit for collecting the particles; and means for folding air flowing from one side of the disk opposite the first port over the disk edge for joining air flowing on the other side where it can enter the conduit.
Claim 12
Dependent Claim
38 words
The system according to claim 7, wherein the air folding means comprises means on an interior surface of the housing for providing a non-uniform clearance between the faces of the disk and the housing along a circumferential direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |