Patent US4813435A successfully refreshed from Google Patents.
US4813435A
Expired / Lapsed
US
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Implantable displacement sensor means
Assignee: Microstrain Inc
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Filing: 1988-04-25
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Granted: 1989-03-21
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Expires: 2008-04-25
Abstract
Abstract This device is adapted for replacable implantation in soft body tissue for the measurement of the mechanical behavior of the soft tissues of the body. The device consists of an hall-effect strain transducer that detects the linear motion of a magnetic core. A barb force transducer uses a barbed probe that is inserted into the soft tissue. The barb force transducer has pressure sensors located within the body of the probe that detect the squeezing of the tissue fibers against the sides of the transducer. The combination of the hall-effect strain transducer and the barb force transducer allows the operator to simultaneously measure the strain and force on a specific soft tissue.
Inventors
- 👤 Steven W. Arms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:40
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/16; A; A61; A61B; A61B5/00; A61B5/103; A61B5/11; A61B5/1107; A61B2562/00; A61B2562/02; A61B2562/0223; A61B5/45; A61B5/4523; A61B5/4533; A61B5/68; A61B5/6846; A61B5/6879; A61B5/6882
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
An implantable displaceable sensor means, for measuring the mechanical behavior of the soft tissue of the body, comprising: at least one support base; said support base has a horizontal aperture located therein; electrical measuring means on said support base for determining linear motion; magnetic means; said magnetic means being located slidably within said horizontal aperture; said electrical means has transmission means attached; said support means has anchoring means; said support means has a plurality of vertical apertures; said anchoring means comprises at least one barbed extension; said barbed extension has pressure sensing means located within said barbed extension; and said pressure sensing means has information sensing means.
Claim 2
Dependent Claim
107 words
An implantable displaceable sensor means, for measuring the mechanical behavior of the soft tissue of the body, comprising: at least one support base; said support base has a horizontal aperture located therein; electrical measuring means on said support base for determining linear motion; magnetic means; said magnetic means being located slidably within said horizontal aperture; said electrical means has transmission means attached; said support means has anchoring means; said support means has a plurality of vertical apertures; said anchoring means comprises at least one barbed extension; said barbed extension has pressure sensing means located within said barbed extension; and said pressure sensing means has information sensing means.
Claim 3
Dependent Claim
27 words
An implantable displacement sensor means, according to claim 1, wherein: said support base comprises two separate units; and said support base has flattened upper and lower surfaces.
Claim 4
Dependent Claim
22 words
An implantable displacement sensor means, according to claim 1, wherein: said electrical measuring means comprises a hall-effect generator and said magnetic means.
Claim 5
Dependent Claim
50 words
An implantable displacement sensor means, according to claim 1, wherein: said magnetic means comprises a sliding core to which a magnet is attached; and said sliding core is connected to one part of said support base and inserted into said horizontal aperture of the other side of said support base.
Claim 6
Dependent Claim
23 words
An implantable displacement sensor means, according to claim 1, wherein: said transmission means has protection means; and said protection means comprises flexible tubing.
Claim 7
Dependent Claim
42 words
An implantable displacement sensor means, according to claim 1, wherein: said barbed extension has hook means located on the end opposite the barbed end of said extension for maintaining pressure on said support base and for providing tieing means for a suture.
Claim 8
Dependent Claim
35 words
An implantable displacement sensor means, according to claim 1, wherein: said barbed extension has a hollowed center section for permitting insertion of said pressure sensing means; and said pressure sensing means comprises piezo electric materials.
References Cited (Backward Citations)
US4204544A
Cited
SU1254319A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |