US3890953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus generating a low frequency, alternating magnetic field for promoting the growth of bone and other body tissues
Assignee: Individual
•
Filing: 1972-04-06
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Granted: 1975-06-24
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Expires: 1992-04-06
Abstract
Abstract The growth or repair of fractured bones or the growth of other body tissues is promoted by means of a coil which is applied to produce a magnetic field at the site in which growth is to be encouraged. The coil is supplied with a low frequency alternating voltage below 50 Hz. A device is applied to the body or implanted in the body in order to concentrate the magnetic field produced by the coil.
Inventors
- 👤 Werner Kraus
- 👤 Hans-Dieter Viehbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61F; A61F2/00; A61F2/02; A61F2/30; A61N; A61N1/00; A61N1/40; A61N2/00; A61N2/02; A61F2/28; A61F2002/2821
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
In an electrical apparatus for promoting the growth of bone and other body tissues by the application thereto of a low frequency alternating magnetic field, such apparatus having current generating means and field applicator means, the improvement wherein the applicator means comprises a flat solenoid coil having an axis about which the coil is wound and composed of a plurality of parallel and flexible windings, each said winding having two adjacent elongate portions and two 180* coil bends joining said elongate portions together, said coil being flexible in the coil plane in the region of said elongate portion for being bent into a U-shape, said coil being bent into such U-shape about an axis parallel to the coil axis and adapted for connection to a source of low frequency alternating current.
Claim 2
Dependent Claim
131 words
In an electrical apparatus for promoting the growth of bone and other body tissues by the application thereto of a low frequency alternating magnetic field, such apparatus having current generating means and field applicator means, the improvement wherein the applicator means comprises a flat solenoid coil having an axis about which the coil is wound and composed of a plurality of parallel and flexible windings, each said winding having two adjacent elongate portions and two 180* coil bends joining said elongate portions together, said coil being flexible in the coil plane in the region of said elongate portion for being bent into a U-shape, said coil being bent into such U-shape about an axis parallel to the coil axis and adapted for connection to a source of low frequency alternating current.
Claim 3
Dependent Claim
113 words
In an electrical apparatus for promoting the growth of bone and other body tissues by the application thereto of a low frequency alternating magnetic field, such apparatus having current generating means and field applicator means, the improvement wherein the applicator means comprises a U-shaped flat solenoid coil having an axis about which the coil is wound and composed of a plurality of parallel windings, each said winding having two adjacent, elongate U-shaped portions and two 180* coil bends joining the ends of said elongate portions together, the coil being curved in such U-shape about an axis parallel to the coil axis and adapted for connection to a source of low frequency alternating current.
Claim 4
Dependent Claim
113 words
In an electrical apparatus for promoting the growth of bone and other body tissues by the application thereto of a low frequency alternating magnetic field, such apparatus having current generating means and field applicator means, the improvement wherein the applicator means comprises a U-shaped flat solenoid coil having an axis about which the coil is wound and composed of a plurality of parallel windings, each said winding having two adjacent, elongate U-shaped portions and two 180* coil bends joining the ends of said elongate portions together, the coil being curved in such U-shape about an axis parallel to the coil axis and adapted for connection to a source of low frequency alternating current.
Claim 5
Dependent Claim
97 words
In an electrical apparatus for promoting the growth of bone and other body tissues by the application thereto of a low frequency alternating magnetic field, such apparatus having current generating means and field applicator means, the improvement wherein the applicator means comprises: a plurality of solenoid coils each having an axis about which such coil is wound and disposed adjacent one another with their axes parallel and adapated for connection to a source of low frequency alternating current, and hinge means connecting adjacent coils together for pivotal movement about axes parallel to the axes of said coils.
Claim 6
Dependent Claim
97 words
In an electrical apparatus for promoting the growth of bone and other body tissues by the application thereto of a low frequency alternating magnetic field, such apparatus having current generating means and field applicator means, the improvement wherein the applicator means comprises: a plurality of solenoid coils each having an axis about which such coil is wound and disposed adjacent one another with their axes parallel and adapated for connection to a source of low frequency alternating current, and hinge means connecting adjacent coils together for pivotal movement about axes parallel to the axes of said coils.
Claim 7
Dependent Claim
15 words
An arrangement as defined in claim 3 wherein said coils having a cylindrical cross section.
Claim 8
Dependent Claim
15 words
An arrangement as defined in claim 3 wherein said coils have an elliptical cross section.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |