Patent US5043707A successfully refreshed from Google Patents.
US5043707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level indicator for liquid reservoirs
Assignee: Individual
•
Filing: 1989-08-18
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Granted: 1991-08-27
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Expires: 2009-08-18
Abstract
Abstract A level indicator for blood reservoirs, in particular of medical apparatus, having a level-responsive component to be provided on the wall of the blood reservoir is provided with an oscillator set to an operating frequency of greater than or equal to 50 MHz and having integrated into its circuit the level-responsive component which, when a preset limiting value is passed, changes the phase condition or amplitude condition decisive for the oscillation of the oscillator.
Inventors
- 👤 Werner Heinze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:14
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/261; A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3624; A61M2205/00; A61M2205/33; A61M2205/3379; A61M2205/3389; Y; Y10; Y10S; Y10S128/00; Y10S128/13
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
111 words
A level indicator for a liquid reservoir having liquid-retaining walling defining said reservoir and used in a medical apparatus, comprising: a level responsive component which comprises a dipole including a carrier having means for mounting said dipole on an external surface of said liquid reservoir walling, an oscillator set to an operating frequency at least as high as 50 MHz and including said dipole integrated therein, and wherein said dipole is adjusted to said oscillating frequency and responsive to a preset limiting value and adapted to change one of a phase condition and an amplitude condition decisive for oscillation of said oscillator in response to said preset limiting value being passed.
Claim 2
Dependent Claim
111 words
A level indicator for a liquid reservoir having liquid-retaining walling defining said reservoir and used in a medical apparatus, comprising: a level responsive component which comprises a dipole including a carrier having means for mounting said dipole on an external surface of said liquid reservoir walling, an oscillator set to an operating frequency at least as high as 50 MHz and including said dipole integrated therein, and wherein said dipole is adjusted to said oscillating frequency and responsive to a preset limiting value and adapted to change one of a phase condition and an amplitude condition decisive for oscillation of said oscillator in response to said preset limiting value being passed.
Claim 3
Dependent Claim
14 words
The indicator of claim 1, wherein said dipole is insulated from the outside environment.
Claim 4
Dependent Claim
23 words
The indicator of claim 1, wherein said dipole is disposed at the height of the reservoir liquid level corresponding to said limiting value.
Claim 5
Dependent Claim
12 words
The indicator of claim 1, wherein said dipole is made of metal.
Claim 6
Dependent Claim
20 words
The indicator of claim 4, wherein the operating frequency of said oscillator is at least as high as 100 MHz.
Claim 7
Dependent Claim
17 words
The indicator of claim 5, wherein the operating frequency of said oscillator is in the microwave range.
Claim 8
Dependent Claim
24 words
The indicator of claim 1, wherein said dipole has plug contacts, and said oscillator is adapted to be plugged on said dipole plug contacts.
Claim 9
Dependent Claim
20 words
The indicator of claim 7, wherein the operating frequency of said oscillator is at least as high as 100 MHz.
Claim 10
Dependent Claim
17 words
The indicator of claim 8, wherein the operating frequency of said oscillator is in the microwave range.
Claim 11
Dependent Claim
22 words
The indicator of claim 1, wherein said dipole is disposed on a flexible carrier attached to said walling of a blood reservoir.
Claim 12
Dependent Claim
11 words
The indicator of claim 10, wherein said flexible carrier is self-adhesive.
Claim 13
Dependent Claim
28 words
The indicator of claim 10, wherein said flexible carrier is made of a material used for printed circuits, and said oscillator is integrated into said flexible carrier material.
Claim 14
Dependent Claim
23 words
The indicator of claim 10, wherein said dipole has plug contacts, said oscillator is adapted to be plugged on said dipole plug contacts.
Claim 15
Dependent Claim
23 words
The indicator of claim 10, wherein said dipole is disposed at the height of the reservoir liquid level corresponding to said limiting value.
Claim 16
Dependent Claim
20 words
The indicator of claim 1, wherein the operating frequency of said oscillator is at least as high as 100 MHz.
Claim 17
Dependent Claim
17 words
The indicator of claim 15, wherein the operating frequency of said oscillator is in the microwave range.
Claim 18
Dependent Claim
23 words
The indicator of claim 16, wherein said dipole is disposed at the height of the reservoir liquid level corresponding to said limiting value.
Claim 19
Dependent Claim
23 words
The indicator of claim 15, wherein said dipole is disposed at the height of the reservoir liquid level corresponding to said limiting value.
Claim 20
Dependent Claim
29 words
The indicator of claim 1, wherein said oscillator has a feedback network with an output, said dipole being disposed at said output of said feedback network of said oscillator.
Claim 21
Dependent Claim
14 words
The indicator of claim 19, wherein said dipole is insulated from the outside environment.
Claim 22
Dependent Claim
23 words
The indicator of claim 19, wherein said dipole has plug contacts, said oscillator is adapted to be plugged on said dipole plug contacts.
Claim 23
Dependent Claim
23 words
The indicator of claim 19, wherein said dipole is disposed at the height of the reservoir liquid level corresponding to said limiting value.
Claim 24
Dependent Claim
12 words
The indicator of claim 19, wherein said dipole is made of metal.
Claim 25
Dependent Claim
14 words
The indicator of claim 23 wherein said dipole is insulated from the outside environment.
Claim 26
Dependent Claim
20 words
The indicator of claim 19, wherein the operating frequency of said oscillator is at least as high as 100 MHz.
Claim 27
Dependent Claim
17 words
The indicator of claim 25, wherein the operating range of said oscillator is in the microwave range.
Claim 28
Dependent Claim
22 words
The indicator of claim 19, wherein said dipole is disposed on a flexible carrier attached to said walling of said blood reservoir.
Claim 29
Dependent Claim
11 words
The indicator of claim 27, wherein said flexible carrier is self-adhesive.
Claim 30
Dependent Claim
28 words
The indicator of claim 27, wherein said flexible carrier is made of a material used for printed circuits, and said oscillator is integrated into said flexible carrier material.
Claim 31
Dependent Claim
22 words
The indicator of claim 27, wherein said dipole has plug contacts, said oscillator is adapted to be plugged on said dipole contacts.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |