Patent US4819105A successfully refreshed from Google Patents.
US4819105A
Expired / Lapsed
US
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Spacer for disks in a disk drive
Assignee: KROPFL JOSEPH
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Filing: 1987-10-26
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Granted: 1989-04-04
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Expires: 2007-10-26
Abstract
Abstract A spacer for separating disks in a disk drive having a plurality of superposed disks surrounding a hub comprising a sheet material ring channel-shaped in cross section having radial and circumferentially spaced apertures for providing transverse fluid communication through the spacer.
Inventors
- 👤 William J. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:18
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0014; G11B23/0021; G11B17/00; G11B17/02; G11B17/021; G11B17/038; G11B23/02; G11B23/03; G11B33/00; G11B33/14; G11B33/1446; G11B33/1473
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
In a disk drive having a plurality of spaced disks surrounding a driven hub for angularly rotating the disks as a unit, the improvement comprising: spacer means including a ring, U-shaped in cross section in the radial direction, surrounding the hub and interposed between adjacent disks, the U-shape of said ring being defined by a substantially planar bight portion and parallel legs extending equidistant from respective lateral limits of the bight portion and further including a row of circumferentially spaced-apart apertures at the intersection of the respective leg of the U-shape with the bight portion for forming a series of transverse fluid passageways through the ring.
Claim 2
Dependent Claim
106 words
In a disk drive having a plurality of spaced disks surrounding a driven hub for angularly rotating the disks as a unit, the improvement comprising: spacer means including a ring, U-shaped in cross section in the radial direction, surrounding the hub and interposed between adjacent disks, the U-shape of said ring being defined by a substantially planar bight portion and parallel legs extending equidistant from respective lateral limits of the bight portion and further including a row of circumferentially spaced-apart apertures at the intersection of the respective leg of the U-shape with the bight portion for forming a series of transverse fluid passageways through the ring.
Claim 3
Dependent Claim
53 words
The combination according to claim 1 in which the apertures of one said row of apertures at the intersection of the bight portion and one leg of the U-shape are circumferentially staggered with respect to the row of apertures at the intersection of the bight portion and the other leg of the U-shape.
Claim 4
Dependent Claim
69 words
In a disk drive having a plurality of spaced disks surrounding a driven hub for angularly rotating the disks as a unit, the improvement comprising: spacer means including a ring, U-shaped in cross section in the radial direction, surrounding the hub and interposed between adjacent disks, said ring having a bight portion and having a series of circumferentially spaced coextensive transverse slots forming fluid passageways through its bight portion.
Claim 5
Dependent Claim
69 words
In a disk drive having a plurality of spaced disks surrounding a driven hub for angularly rotating the disks as a unit, the improvement comprising: spacer means including a ring, U-shaped in cross section in the radial direction, surrounding the hub and interposed between adjacent disks, said ring having a bight portion and having a series of circumferentially spaced coextensive transverse slots forming fluid passageways through its bight portion.
Claim 6
Dependent Claim
84 words
In a disk drive having a plurality of spaced disks surrounding a driven hub for angularly rotating the disks as a unit, the improvement comprising: spacer means including a ring, U-shaped in cross section, in the radial direction, surrounding the hub and interposed between adjacent disks, the ring U-shape including a pair of legs extending from a bight portion and having a series of circumferentially spaced transverse recesses for forming transverse fluid passageways in the edge surface of the legs opposite the bight portion.
Claim 7
Dependent Claim
84 words
In a disk drive having a plurality of spaced disks surrounding a driven hub for angularly rotating the disks as a unit, the improvement comprising: spacer means including a ring, U-shaped in cross section, in the radial direction, surrounding the hub and interposed between adjacent disks, the ring U-shape including a pair of legs extending from a bight portion and having a series of circumferentially spaced transverse recesses for forming transverse fluid passageways in the edge surface of the legs opposite the bight portion.
Claim 8
Dependent Claim
57 words
A spacer for insertion between adjacent disks in a disk drive, comprising: a ring substantially defining a U-shape in transverse cross section in the radial direction having a planar bight portion and parallel legs, said bight portion contacting the adjacent surface of one said disk and said legs contacting the adjacent surface of the other said disk.
Claim 9
Dependent Claim
57 words
A spacer for insertion between adjacent disks in a disk drive, comprising: a ring substantially defining a U-shape in transverse cross section in the radial direction having a planar bight portion and parallel legs, said bight portion contacting the adjacent surface of one said disk and said legs contacting the adjacent surface of the other said disk.
Claim 10
Dependent Claim
50 words
The spacer according to claim 5 in which the ring includes: a circumferential row of spaced-apart apertures with each aperture intersecting an edge portion of the bight portion and a portion of one leg of the parallel legs for providing fluid communication between the interior and exterior of the ring.
Claim 11
Dependent Claim
36 words
The spacer according to claim 5 in which the ring includes: a pair of concentric rows of circumferentially spaced-apart apertures in said ring adjacent the juncture of the legs of the U-shape with its bight portion.
Claim 12
Dependent Claim
36 words
The spacer according to claim 7 in which the apertures in one row of said pair of rows are staggered with respect to the apertures in the other row of said pair of rows of apertures.
Claim 13
Dependent Claim
41 words
The spacer according to claim 7 in which the bight portion of said U-shaped ring is provided with a series of transverse slots extending between and communicating with adjacent apertures of the respective row of said pair of rows of apertures.
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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |