US3766517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring the speed of flowing media
Assignee: Siemens AG
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Filing: 1972-01-10
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Granted: 1973-10-16
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Expires: 1992-01-10
Abstract
Abstract Apparatus for measuring the speed of media flowing in conduits is specifically concerned with the measuring of the speed of blood flowing in its channels. The apparatus is using ultrasound according to the Doppler principle method and is particularly characterized in that it has a double measuring system each containing a separate sender-receiver and that the two measuring systems are combined in such manner that the senders-receivers contained therein have sending-receiving directions which form an angle of 90*.
Inventors
- 👤 K Fahrbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:35
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/87; G01P; G01P5/00; G01P5/24; G01P5/241; G01P5/242; G01P5/244; G01S15/02; G01S15/50; G01S15/58; G01S15/588
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
140 words
An apparatus for measuring the speed of flowing media, particularly that of blood, by the use of ultrasound according to the Doppler principle method, said apparatus comprising a double ultrasound measuring system, each of said systems having a sender-receiver, the sending-receiving directions of said systems converging at an angle of 90* to each other, and an electronic calculator connected with said systems for calculating the measured difference frequency between the emitted and received frequency of each of said systems, said calculator comprising two squaring members for simultaneously and separately squaring the electric voltages corresponding to difference frequencies, an adding member for adding the squared voltages, a root extracting device for calculating the square root of the added voltages, and an adjustable dividing member, said members being interconnected in the stated order, said dividing member comprising an outlet for an indicator.
Claim 2
Independent Claim
140 words
An apparatus for measuring the speed of flowing media, particularly that of blood, by the use of ultrasound according to the Doppler principle method, said apparatus comprising a double ultrasound measuring system, each of said systems having a sender-receiver, the sending-receiving directions of said systems converging at an angle of 90* to each other, and an electronic calculator connected with said systems for calculating the measured difference frequency between the emitted and received frequency of each of said systems, said calculator comprising two squaring members for simultaneously and separately squaring the electric voltages corresponding to difference frequencies, an adding member for adding the squared voltages, a root extracting device for calculating the square root of the added voltages, and an adjustable dividing member, said members being interconnected in the stated order, said dividing member comprising an outlet for an indicator.
Claim 3
Dependent Claim
39 words
Apparatus in accordance with claim 1, wherein said double ultrasound measuring system comprises shifting means for shifting at least one of said systems relatively to the other system in the direction of a straight line connectiNg the two systems.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |