US3351925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air bearing magnetic head mounting
Assignee: US Philips Corp
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Filing: 1964-07-06
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Granted: 1967-11-07
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Johannes Autoius Van Lammeren
- 👤 Barnier Georgius
- 👤 Koorneef Jacob
- 👤 Bos Jules
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN COMBINATION: AT LEAST ONE MAGNETC HEAD HAVING A FRONT FACE ADAPTED TO CO-ACT WITH A MOVING MAGNETIC CARRIER WHICH CREATES A GAS PRESSURE BETWEEN SAID FIRST FACE AND SAID CARRIER WHEN IN OPERATTION, AND A REAR FACE REMOTE FROM SAID CARRIER, SAID HEAD BEARING ON A FIXEDLY ARRANGED KNIFE-EDGED SUPPORT, AN ADJUSTABLE FLEXIBLE MEMBER EXERTING A FORCE FROM ONE END THEROF, COUPLING MEANS MECHANICALLY COUPLING SAID ONE END OF THE FLEXIBLE MEMBER AND THE REAR FACE OF THE HEAD, SAID FORCE BEING EXERTED ON SAID HEAD AGAINST SAID GAS PRESSURE WHEN THE CARRIER IS MOVING, SAID COUPLING MEANS CREATING A COMPONENT OF SAID FORCE WHICH IS SUBSTANTIALLY PARALLEL TO THE DIRECTION OF MOVEMENT OF THE CARRIER AND SUBSTANTIALLY PERPENDICULAR TO THE KNIFE-EDGED SUPPORT, AND STOP MEANS ON SAID HEAD CO-ACTING WITH A FIXED STATIONARY MEMBER FOR LIMITING THE DISTANCE OF THE HEAD FROM THE CARRIER WHEN THE CARRIER IS STATIONARY.
Claim 2
Dependent Claim
151 words
IN COMBINATION: AT LEAST ONE MAGNETC HEAD HAVING A FRONT FACE ADAPTED TO CO-ACT WITH A MOVING MAGNETIC CARRIER WHICH CREATES A GAS PRESSURE BETWEEN SAID FIRST FACE AND SAID CARRIER WHEN IN OPERATTION, AND A REAR FACE REMOTE FROM SAID CARRIER, SAID HEAD BEARING ON A FIXEDLY ARRANGED KNIFE-EDGED SUPPORT, AN ADJUSTABLE FLEXIBLE MEMBER EXERTING A FORCE FROM ONE END THEROF, COUPLING MEANS MECHANICALLY COUPLING SAID ONE END OF THE FLEXIBLE MEMBER AND THE REAR FACE OF THE HEAD, SAID FORCE BEING EXERTED ON SAID HEAD AGAINST SAID GAS PRESSURE WHEN THE CARRIER IS MOVING, SAID COUPLING MEANS CREATING A COMPONENT OF SAID FORCE WHICH IS SUBSTANTIALLY PARALLEL TO THE DIRECTION OF MOVEMENT OF THE CARRIER AND SUBSTANTIALLY PERPENDICULAR TO THE KNIFE-EDGED SUPPORT, AND STOP MEANS ON SAID HEAD CO-ACTING WITH A FIXED STATIONARY MEMBER FOR LIMITING THE DISTANCE OF THE HEAD FROM THE CARRIER WHEN THE CARRIER IS STATIONARY.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |