US4456936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cantilevered transducer carriage
Assignee: International Business Machines Corp
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Filing: 1982-01-18
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Granted: 1984-06-26
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Expires: 2002-01-18
Abstract
Abstract A magnetic transducer support assembly includes parrallel flexure spring supporting elements which are of sufficient length to approximate linear motion over the length of translational displacement used. The flexures are formed of a single continuous length of flat spring material, and built-up portions on the spring stretches between the base member and transducer carriage are provided to resist twisting and other unwanted motions induced by vibration and similar influences. Displacement is achieved by cam actuation driven by a stepper motor which may control multiple such transducer mountings on a single side of a disk or on opposite sides of a disk.
Inventors
- 👤 Michael J. Steen
- 👤 Michael N. Zell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B21/00; G11B21/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
222 words
A suspension assembly for a transducer head comprising: a U-shaped flat spring element having a pair of parallel leg portions with a connecting bit portion; a head carriage formed adjacent either said spring element bite portion which is remote from the free ends of said parallel leg portions or, alternatively, adjacent the free ends of said parallel leg portions; a base member formed adjacent the other one of either said spring element bite portion which is remote from the free ends of said parallel leg portions or, alternatively, adjacent the free ends of said parallel leg portions, respectively, such that the none-disabled portions of said spring element parallel leg portions extend with the major surfaces thereof in parallel from said carriage to said base member; a pair of built-up stiffener sections respectively formed about the central section of each of said spring element parallel leg portions and extending from said carriage to said base member to confine and immobilize said central portions second of each said spring element parallel leg portions and limit flexure of said spring element parallel leg portions to the non-disabled portions between said stiffener sections and said base member and carriage; and a transducer carried by said carriage whereby deflection of said carriage and flexing of said spring element parallel leg portions effects parallel translation of said transducer.
Claim 2
Dependent Claim
222 words
A suspension assembly for a transducer head comprising: a U-shaped flat spring element having a pair of parallel leg portions with a connecting bit portion; a head carriage formed adjacent either said spring element bite portion which is remote from the free ends of said parallel leg portions or, alternatively, adjacent the free ends of said parallel leg portions; a base member formed adjacent the other one of either said spring element bite portion which is remote from the free ends of said parallel leg portions or, alternatively, adjacent the free ends of said parallel leg portions, respectively, such that the none-disabled portions of said spring element parallel leg portions extend with the major surfaces thereof in parallel from said carriage to said base member; a pair of built-up stiffener sections respectively formed about the central section of each of said spring element parallel leg portions and extending from said carriage to said base member to confine and immobilize said central portions second of each said spring element parallel leg portions and limit flexure of said spring element parallel leg portions to the non-disabled portions between said stiffener sections and said base member and carriage; and a transducer carried by said carriage whereby deflection of said carriage and flexing of said spring element parallel leg portions effects parallel translation of said transducer.
Claim 3
Dependent Claim
35 words
The transducer head suspension assembly of claim 1 wherein the axis of said transducer is parallel to the major surfaces of said spring element parallel leg portions when the latter are in an unstressed condition.
Claim 4
Dependent Claim
26 words
The suspension assembly of claim 2 wherein said cam is mounted about the same axis as a diskette cooperating with said transducer carried by said carriage.
Claim 5
Dependent Claim
42 words
The suspension assembly of claim 1 wherein said assembly is formed with said carriage member formed about the bite portion of said U-shaped spring element and said base member formed about the distal ends of said spring element cantilevered parallel leg portions.
Claim 6
Dependent Claim
116 words
A magnetic transducer head suspension assembly comprising: a pair of parallel flexure spring elements of uniform width and thickness; a transducer carriage secured to the first ends of said parallel spring elements; a base member secured to the opposite ends of said parallel spring elements; and a pair of plastic stiffener elements respectively molded about a central portion of each of said parallel spring elements intermediate said carriage and said base member causing said spring elements to function as two pairs of shortened parallel flexure spring elements; wherein said flexure spring elements are formed of a single continuous U-shaped length of flexure spring material with the parallel elements extending between said carriage and said base member.
Claim 7
Dependent Claim
116 words
A magnetic transducer head suspension assembly comprising: a pair of parallel flexure spring elements of uniform width and thickness; a transducer carriage secured to the first ends of said parallel spring elements; a base member secured to the opposite ends of said parallel spring elements; and a pair of plastic stiffener elements respectively molded about a central portion of each of said parallel spring elements intermediate said carriage and said base member causing said spring elements to function as two pairs of shortened parallel flexure spring elements; wherein said flexure spring elements are formed of a single continuous U-shaped length of flexure spring material with the parallel elements extending between said carriage and said base member.
Claim 8
Dependent Claim
26 words
The magnetic transducer head suspension assembly of claim 5 wherein said carriage is formed about the bite portion of said U-shaped length of flexure spring material.
Claim 9
Dependent Claim
44 words
The magnetic transducer head suspension assembly of claim 6 further comprising: a cam follower element mounted on said carriage and a rotary cam engaging said cam follower element to impart a translating deflection of said transducer carriage member with respect to said base member.
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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |