Patent US5398286A successfully refreshed from Google Patents.
Patent US4439792A successfully refreshed from Google Patents.
US4439792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swing arm arrangement for a magnetic disc storage apparatus
Assignee: US Philips Corp
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Filing: 1981-09-24
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Granted: 1984-03-27
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Expires: 2001-09-24
Abstract
Abstract A swing arm arrangement includes at least one magnetic head provided on at least one swing arm of a magnetic disc store. The swing arm has a recess formed by walls whose facing portions cooperate with opposite portions of a single stop cam to limit the pivotal movements of the arm.
Inventors
- 👤 Oelke Van de Bult
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:05
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
A swing arm arrangement for moving and positioning a magnetic head over a surface of a rigid rotatable magnetic disc of a magnetic disc store for digital data, the arrangement comprising: a stationary frame; at least one swing arm pivotally mounted to the frame about an axis for movement between a first position and a second position, the arm including an end remote from the pivotal axis and also including a pair of opposed walls connected to the end, the walls having mutually facing sides forming a recess therebetween; a magnetic head connected to the arm near the end; means for stopping the pivotal movement of the arm at the first and at the second positions, the stop means including a stop connected to the frame and disposed in the recess, the stop having a first pair of opposite sides disposed on a first axis lying in a plane perpendicular to the pivotal axis, the stop sides cooperating with respective wall sides so that the pivotal movement of the arm is stopped at the first and at the second positions.
Claim 2
Dependent Claim
180 words
A swing arm arrangement for moving and positioning a magnetic head over a surface of a rigid rotatable magnetic disc of a magnetic disc store for digital data, the arrangement comprising: a stationary frame; at least one swing arm pivotally mounted to the frame about an axis for movement between a first position and a second position, the arm including an end remote from the pivotal axis and also including a pair of opposed walls connected to the end, the walls having mutually facing sides forming a recess therebetween; a magnetic head connected to the arm near the end; means for stopping the pivotal movement of the arm at the first and at the second positions, the stop means including a stop connected to the frame and disposed in the recess, the stop having a first pair of opposite sides disposed on a first axis lying in a plane perpendicular to the pivotal axis, the stop sides cooperating with respective wall sides so that the pivotal movement of the arm is stopped at the first and at the second positions.
Claim 3
Dependent Claim
14 words
An arrangement as claimed in claim 1, wherein the stop is a unitary member.
Claim 4
Dependent Claim
16 words
An arrangement as claimed in claim 1, wherein the stop is formed of an elastic material.
Claim 5
Dependent Claim
62 words
An arrangement as claimed in claim 1, wherein the stop also includes a second pair of opposite sides disposed on a second axis oriented generally perpendicular to the first axis, the first pair of sides being separated by a first distance and the second pair of sides being separated by a second distance, the first distance being greater than the second distance.
Claim 6
Dependent Claim
58 words
An arrangement as claimed in claim 4, wherein the stop is pivotally mounted to the frame, the stop being pivotal between an operating position and a maintenance position, and a substantially 90° angle separating the operating position from the maintenance position so that the stop is pivotal from the operating position through the angle to the maintenance position.
Claim 7
Dependent Claim
14 words
An arrangement as claimed in claim 5, wherein the stop has an eccentric shape.
Claim 8
Dependent Claim
15 words
An arrangement as claimed in claim 6, wherein the stop is an elongate unitary member.
Claim 9
Dependent Claim
57 words
An arrangement as claimed in claim 5, wherein the frame includes two frame portions disposed in respective parallel planes oriented perpendicular to the pivotal axis, and a spacer is arranged between the frame portions and extends in a direction generally perpendicular to the frame portion planes, the stop having an eccentric opening through which the spacer extends.
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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |