Patent US4331989A successfully refreshed from Google Patents.
US4331989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic disc file having dual lock mechanism
Assignee: Samsung Electronics Co Ltd
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Filing: 1980-05-15
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Granted: 1982-05-25
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Expires: 2000-05-15
Abstract
Abstract A dual lock mechanism for a magnetic disc drive whereby rotation of the disc spindle and translation of the carriage assembly can be prevented. A first lock arm is pivotally mounted whereby one end can engage the spindle drive motor. A connector link is operated in response to rotation of the first lock arm and pivots a second lock arm within the housing into engagement with the carriage assembly.
Inventors
- 👤 Stephen R. Viskochil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:53
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
In a disc file having a housing, a disc rotation motor mounted in the bottom portion of said housing, and a magnetic head carriage assembly mounted within said housing for linear translation, a lock for preventing rotation of said motor and translation of said carriage assembly comprising a first lock arm pivotally mounted on the bottom portion of said housing, one end of said lock arm including means for engaging said motor, an operable lever attached to said lock arm for pivoting said one end into engagement with said motor, a connector link having one end pivotably mounted through said bottom portion and the opposite end engaging an end of said first lock arm whereby rotation of said first lock arm pivots said connector link, a second lock arm for said carriage assembly within said housing, and means connecting said second lock arm to said connector link whereby pivoting of said connector link rotates said second lock arm into engagement with said carriage assembly when said first lock arm is pivoted into engagement with said motor.
Claim 2
Dependent Claim
176 words
In a disc file having a housing, a disc rotation motor mounted in the bottom portion of said housing, and a magnetic head carriage assembly mounted within said housing for linear translation, a lock for preventing rotation of said motor and translation of said carriage assembly comprising a first lock arm pivotally mounted on the bottom portion of said housing, one end of said lock arm including means for engaging said motor, an operable lever attached to said lock arm for pivoting said one end into engagement with said motor, a connector link having one end pivotably mounted through said bottom portion and the opposite end engaging an end of said first lock arm whereby rotation of said first lock arm pivots said connector link, a second lock arm for said carriage assembly within said housing, and means connecting said second lock arm to said connector link whereby pivoting of said connector link rotates said second lock arm into engagement with said carriage assembly when said first lock arm is pivoted into engagement with said motor.
Claim 3
Dependent Claim
26 words
A lock as defined by claim 1 and further including a brake pad attached to one end of said first lock arm for engaging said motor.
Claim 4
Dependent Claim
34 words
A lock as defined by claim 2 wherein said lever is flexible and said lever is flexed in the locked position whereby said first lock arm is maintained in pressure engagement with said motor.
Claim 5
Dependent Claim
42 words
A lock as defined by claim 1 and further including boss means in said housing for retaining said lever in a locked position and in an unlocked position, and spring means for yieldably biasing said lever in said locked and unlocked positions.
Claim 6
Dependent Claim
31 words
A lock as defined by claim 1 and further including leaf spring means attached to said first lock arm and yieldably biasing said connector link into engagement with said lock arm.
Claim 7
Dependent Claim
27 words
A lock as defined by claim 1 wherein said carriage assembly includes slot means and said second lock arm includes a detent for engaging said slot means.
Claim 8
Dependent Claim
13 words
A lock as defined by claim 1 wherein said lever is manually operated.
References Cited (Backward Citations)
US2840642A
Cited
US3973273A
Cited
US3803358A
Cited
US3940148A
Cited
US4139874A
Cited
US4135721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |