US4170128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for density determination
Assignee: Individual
•
Filing: 1977-11-29
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Granted: 1979-10-09
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Expires: 1997-11-29
Abstract
Abstract An apparatus for measurement of density, particularly of liquids and gases, by determination of the characteristic frequency of a tube-shaped bending-type oscillator which is filled with the measuring substance, which oscillator is connected with a tensioned body, the tension of which is dependent upon the temperature and/or the pressure of the measuring substance. The tensioned body is bending-slack (a string). A member is provided which guarantees that the deflection of the bending oscillator is transmitted to the string and the restoring force of the string is transmitted to the oscillator.
Inventors
- 👤 Otto Kratky
- 👤 Hans Leopold
- 👤 Hans Stabinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:43
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/002; G01N2009/006
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
An apparatus for the measurement of the density of a fluid, by the determination of the characteristic frequency of a vibrating tube filled with said fluid, comprising: a tube-shaped element filled with said fluid; means for vibrating said element transverse to its longitudinal axis; an elongate relatively thin pretensioned body; means for varying the tension in said body in response to a characteristic of said fluid; means for transmitting the deflection of the tube-shaped element to a deflection of part of said body, and the force of said body resisting deflection to said element.
Claim 2
Independent Claim
94 words
An apparatus for the measurement of the density of a fluid, by the determination of the characteristic frequency of a vibrating tube filled with said fluid, comprising: a tube-shaped element filled with said fluid; means for vibrating said element transverse to its longitudinal axis; an elongate relatively thin pretensioned body; means for varying the tension in said body in response to a characteristic of said fluid; means for transmitting the deflection of the tube-shaped element to a deflection of part of said body, and the force of said body resisting deflection to said element.
Claim 3
Dependent Claim
14 words
The apparatus as set forth in claim 1, wherein said body in a cord.
Claim 4
Dependent Claim
19 words
The apparatus according to claim 1, wherein the two ends of said body are fastened to said tube-shaped element.
Claim 5
Dependent Claim
92 words
The apparatus as set forth in claim 3, wherein said tube-shaped element is U-shaped having two legs, said body is connected at said two ends to one of said legs on a side thereof facing the other of said legs, a rod is connected to said body and to said other leg of said tube-shaped element, and two slides are moveably disposed on said one leg and each have a portion contacting said body, each of said two slides, respectively, is disposed adjacent opposite ends of said body relative to said rod.
Claim 6
Dependent Claim
45 words
The apparatus according to claim 1, further comprising slide means moveably disposed on said tube-shaped element adjacent said body, at least one rod connected to said body, said slide means and said at least one rod, respectively, for varying the effective length of said body.
Claim 7
Dependent Claim
31 words
The apparatus according to claim 5, wherein said tube-shaped element is made of a material having a different thermal coefficient of expansion than the thermal coefficient of expansion of said body.
Claim 8
Dependent Claim
34 words
The apparatus according to claim 5, wherein said tube-shaped element is made of a material having a different thermal coefficient of expansion than the thermal coefficient of expansion of said at least one rod.
Claim 9
Dependent Claim
37 words
The apparatus according to claim 5, wherein said tube-shaped element is made of a material having a different thermal coefficient of expansion than the thermal coefficient of expansion of said body and said at least one rod.
Claim 10
Dependent Claim
48 words
The apparatus as set forth in claim 5, wherein said at least one rod at one end thereof is connected to said tube-shaped element and at another end thereof is connected centrally to said body, said slide means constitute two slides each having a portion contacting said body.
Claim 11
Dependent Claim
24 words
The apparatus according to claim 1, wherein said means for varying comprises means for tensioning said body dependent on the pressure of said fluid.
Claim 12
Dependent Claim
62 words
The apparatus as set forth in claim 10, wherein said body is fixed on one end thereof, a slide moveably mounted on said tube-shaped element, a rod having ends respectively connected to said slide and moveably to said body, said tensioning means comprises a membrane connected to the other end of said body and communicating with said fluid in said tube-shaped body.
Claim 13
Dependent Claim
50 words
The apparatus as set forth in claim 11, further comprising a cylinder, said membrane is mounted in said cylinder, spring means engaging one side of said membrane for prestressing said body, a conduit communicatingly connected to said cylinder at the other side of said membrane and to said tube-shaped element.
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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |