Patent US3712133A successfully refreshed from Google Patents.
US3712133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter probe
Assignee: Boehringer Ingelheim Pharma GmbH and Co KG
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Filing: 1970-07-24
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Granted: 1973-01-23
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Expires: 1990-07-24
Abstract
Abstract An insulative hollow cylinder, whose internal bore is slightly larger than the external dimensions of the blood vessel on which it is to be mounted, has a longitudinal portion removed to form an access opening. A first magnetizing coil is formed about the exterior of the insulative cylinder and is looped to extend circumferentially about the cylinder at substantially 180* thereof. At each side of the first magnetizing coil there is provided at least one auxiliary winding whose field axis is directed through the blood vessel. The resultant magnetic field from the first magnetizing coil and auxiliary windings is highly uniform throughout the entire cross section of the blood vessel on which the probe is mounted.
Inventors
- 👤 A Westersten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:15
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; A61B5/0265; G; G01; G01F; G01F1/00; G01F1/56; G01F1/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A Mblood flowmeter probe, comprising: a hollow, generally cylindrical body having a removable portion thereof via which the body is mounted onto a blood vessel in surrounding relationship thereto, said removable portion extending less than 90* of said body circular cross-section; a first magnetizing winding conformed to the outer surface of the cylindrical body and extending circumferentially thereabout more than 180* and lying outwardly of the region of the removable wall portion; and a pair of generally circular magnetizing windings superimposed upon said first winding each at a respective circumferential extreme of said first winding, said circular windings each having a projected area onto said first winding of less than one half of the total areal extent of said first winding whereby said circular magnetizing windings provide individual magnetic fields in the hollow cylindrical body primarily in the region immediately adjacent the removable portion for supplementing the magnetic field provided by said first winding in said region.
Claim 2
Dependent Claim
157 words
A Mblood flowmeter probe, comprising: a hollow, generally cylindrical body having a removable portion thereof via which the body is mounted onto a blood vessel in surrounding relationship thereto, said removable portion extending less than 90* of said body circular cross-section; a first magnetizing winding conformed to the outer surface of the cylindrical body and extending circumferentially thereabout more than 180* and lying outwardly of the region of the removable wall portion; and a pair of generally circular magnetizing windings superimposed upon said first winding each at a respective circumferential extreme of said first winding, said circular windings each having a projected area onto said first winding of less than one half of the total areal extent of said first winding whereby said circular magnetizing windings provide individual magnetic fields in the hollow cylindrical body primarily in the region immediately adjacent the removable portion for supplementing the magnetic field provided by said first winding in said region.
Claim 3
Dependent Claim
139 words
A blood flowmeter probe, comprising: a hollow, generally cylindrical body having a portion thereof removed to enable mounting the body onto a blood vessel in surrounding relationship thereto, said removed portion extending less than 90* of said body circular cross-section; a first air-core coil conformed to the outer surface of the cylindrical body and extending circumferentially thereabout more than 180*, but less than 270*, and outwardly of the region of the removed wall portion; and a pair of generally circular air-core coils individually superimposed upon said first coil at the respective circumferential extremes thereof, said circular air-core coils each projecting onto said first air-core coil an angular extent substantially less than 90* whereby magnetic field reinforcement substantially solely in the region of the removed portion is effected producing an overall substantially uniform magnetic field throughout the hollow cylindrical body.
Claim 4
Dependent Claim
139 words
A blood flowmeter probe, comprising: a hollow, generally cylindrical body having a portion thereof removed to enable mounting the body onto a blood vessel in surrounding relationship thereto, said removed portion extending less than 90* of said body circular cross-section; a first air-core coil conformed to the outer surface of the cylindrical body and extending circumferentially thereabout more than 180*, but less than 270*, and outwardly of the region of the removed wall portion; and a pair of generally circular air-core coils individually superimposed upon said first coil at the respective circumferential extremes thereof, said circular air-core coils each projecting onto said first air-core coil an angular extent substantially less than 90* whereby magnetic field reinforcement substantially solely in the region of the removed portion is effected producing an overall substantially uniform magnetic field throughout the hollow cylindrical body.
Claim 5
Dependent Claim
155 words
A probe for being received onto a fluid-carrying conduit to measure fluid velocity therethrough, comprising: a hollow, insulative tube, the bore of which is sufficient to receive the conduit therewithin; said tube including a removable section forming an access opening via which the tube is received on the conduit; a first air-core multi-turn coil wrapped around the outside surface of said tube and extending circumferentially thereabout between about 180* and 270*; second and third air-core coils located on said first coil at the respective circumferential extremities thereof, each of said second and third coils having a projected angle less than 90* of said tube cross-section; and means serially interconnecting said first, second and third coils with a common electrical energy source such that said coils are magnetically poled to produce reinforcement of the magnetic field in the region immediately adjacent the removable section whereby a highly uniform magnetic field is produced across the tube bore.
Claim 6
Dependent Claim
155 words
A probe for being received onto a fluid-carrying conduit to measure fluid velocity therethrough, comprising: a hollow, insulative tube, the bore of which is sufficient to receive the conduit therewithin; said tube including a removable section forming an access opening via which the tube is received on the conduit; a first air-core multi-turn coil wrapped around the outside surface of said tube and extending circumferentially thereabout between about 180* and 270*; second and third air-core coils located on said first coil at the respective circumferential extremities thereof, each of said second and third coils having a projected angle less than 90* of said tube cross-section; and means serially interconnecting said first, second and third coils with a common electrical energy source such that said coils are magnetically poled to produce reinforcement of the magnetic field in the region immediately adjacent the removable section whereby a highly uniform magnetic field is produced across the tube bore.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |