US4896231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backbone gasket for disc drives
Assignee: Seagate Technology LLC
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Filing: 1988-07-18
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Granted: 1990-01-23
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Expires: 2008-07-18
Abstract
Abstract An improved gasket for a disc drive system having magnetic information storage media located within a sealed housing. The housing includes top and bottom casing members that are clamped together with the gasket disposed therebetween to seal the drive. The gasket includes a stiffener layer sandwiched by a pair of foam layers.
Inventors
- 👤 Robert F. Hoppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:27
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/14; G11B33/1446; G11B33/1466; G11B25/00; G11B25/04; G11B25/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
In a disc drive system having a recording media within a sealed housing having top and bottom casing members, a read/write head for transferring information between the recording media and an external system and a head positioner assembly for locating the head relative to the recording media, the improvement comprising a backbone gasket for sealing a connection between the top and bottom casing members, the backbone gasket including: a stiffener layer having opposing top and bottom sides; and a pair of elastomeric layers adhered to the top and bottom opposing sides of the stiffener layer respectively, thereby sandwiching the stiffening layer; and wherein the stiffener layer has a substantially lower modulus of elasticity than the elastomeric layers.
Claim 2
Dependent Claim
117 words
In a disc drive system having a recording media within a sealed housing having top and bottom casing members, a read/write head for transferring information between the recording media and an external system and a head positioner assembly for locating the head relative to the recording media, the improvement comprising a backbone gasket for sealing a connection between the top and bottom casing members, the backbone gasket including: a stiffener layer having opposing top and bottom sides; and a pair of elastomeric layers adhered to the top and bottom opposing sides of the stiffener layer respectively, thereby sandwiching the stiffening layer; and wherein the stiffener layer has a substantially lower modulus of elasticity than the elastomeric layers.
References Cited (Backward Citations)
US4725904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |