US3636764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnet for blood flowmeters and the like
Assignee: Gould Inc
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Filing: 1969-10-30
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Granted: 1972-01-25
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Expires: 1989-10-30
Abstract
Abstract An improved electromagnet for blood flowmeters and the like is made by filling the open central portion of a magnetizing coil with a mixture of iron powder suspended in a quick-hardening epoxy resin. The mixture is thereafter heated and cured to form an electrically nonconductive magnetic core.
Inventors
- 👤 Horst Funfstuck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:43
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; A61B5/0265; G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/586
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
An improved blood flowmeter comprising: an insulative hollow cylindrical tube adapted to fit around a blood vessel; an electromagnet mounted on said tube for applying a magnetic field across a blood vessel to induce an electric signal in the blood flowing therethrough; said electromagnet comprising: an electrically conductive coil having an interior wall defining an open central portion; and an electrically nonconductive magnetic core substantially filling said open central portion of said coil and conforming to and being in intimate and continuous contact with said interior wall of said coil and a portion of the exterior surface of said tube; said core comprising a hardened resin having ferromagnetic particles suspended therein; and signal measuring means operatively connected to said tube for measuring the magnitude of the electric signal induced in the blood flowing through the blood vessel.
Claim 2
Dependent Claim
137 words
An improved blood flowmeter comprising: an insulative hollow cylindrical tube adapted to fit around a blood vessel; an electromagnet mounted on said tube for applying a magnetic field across a blood vessel to induce an electric signal in the blood flowing therethrough; said electromagnet comprising: an electrically conductive coil having an interior wall defining an open central portion; and an electrically nonconductive magnetic core substantially filling said open central portion of said coil and conforming to and being in intimate and continuous contact with said interior wall of said coil and a portion of the exterior surface of said tube; said core comprising a hardened resin having ferromagnetic particles suspended therein; and signal measuring means operatively connected to said tube for measuring the magnitude of the electric signal induced in the blood flowing through the blood vessel.
Claim 3
Dependent Claim
119 words
A blood flowmeter in which a magnetic field is induced in a blood vessel by means of an electromagnet to induce an electrical signal when blood flows through said blood vessel, the improvement which comprises a hollow cylindrical tube adapted to fit around the blood vessel, an electromagnet mounted on said tube, for applying a magnetic field across said tube, said electromagnet comprising an electrically conductive coil having an interior walL defining an open central portion; and an electrically nonconductive magnetic core substantially filling said open central portion of said coil, and conforming to and being in intimate and continuous contact with said interior wall of said coil, said core comprising a resin having therethrough magnetic particles suspended therein.
Claim 4
Dependent Claim
119 words
A blood flowmeter in which a magnetic field is induced in a blood vessel by means of an electromagnet to induce an electrical signal when blood flows through said blood vessel, the improvement which comprises a hollow cylindrical tube adapted to fit around the blood vessel, an electromagnet mounted on said tube, for applying a magnetic field across said tube, said electromagnet comprising an electrically conductive coil having an interior walL defining an open central portion; and an electrically nonconductive magnetic core substantially filling said open central portion of said coil, and conforming to and being in intimate and continuous contact with said interior wall of said coil, said core comprising a resin having therethrough magnetic particles suspended therein.
Claim 5
Dependent Claim
94 words
A lumen for a blood flowmeter, said lumen comprising an insulated hollow cylindrical tube adapted to fit around a blood vessel, an electromagnet mounted on said tube to apply a magnetic field across said tube, said electromagnet comprising an electrically conductive coil having an interior wall defining an open central portion and an electrically nonconductive magnetic core substantially filling said open central portion of said coil and conforming to and being in intimate and continuous contact with said interior wall of said coil, said core comprising a hardened resin with magnetic particles suspended therein.
Claim 6
Dependent Claim
94 words
A lumen for a blood flowmeter, said lumen comprising an insulated hollow cylindrical tube adapted to fit around a blood vessel, an electromagnet mounted on said tube to apply a magnetic field across said tube, said electromagnet comprising an electrically conductive coil having an interior wall defining an open central portion and an electrically nonconductive magnetic core substantially filling said open central portion of said coil and conforming to and being in intimate and continuous contact with said interior wall of said coil, said core comprising a hardened resin with magnetic particles suspended therein.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |