Patent US3737844A successfully refreshed from Google Patents.
US3737844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting small particles in a tank and an apparatus for carrying out the same
Assignee: Chiyoda Corp
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Filing: 1971-10-26
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Granted: 1973-06-05
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Expires: 1991-10-26
Abstract
Abstract An ultra-sonic transmitting means and an ultra-sonic receiving means are provided in fluidized region of a tank at a fixed interval. An ultra-sonic wave is transmitted from the transmitting means to the receiving means and bubbles are prevented from entering the space between the transmitting means and the receiving means, and the presence or absence of small particles is detected by measuring the attenuation of the ultrasonic wave.
Inventors
- 👤 T Yokoyama
- 👤 T Kanda
- 👤 Y Oshio
- 👤 Y Hori
- 👤 K Yazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:22
CPC Classifications
H; H04; H04B; H04B11/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A method for detecting small particles in a tank comprising the steps of providing in said tank an ultra-sonic transmitting means and an ultra-sonic receiving means opposite to each other at a fixed interval, maintaining the space between said transmitting means and said receiving means free of bubbles, transmitting an ultra-sonic wave from said transmitting means to said receiving means, and detecting the presence or absence of small particles in said space by the attenuation or lack of attenuation of said ultra-sonic wave.
Claim 2
Independent Claim
83 words
A method for detecting small particles in a tank comprising the steps of providing in said tank an ultra-sonic transmitting means and an ultra-sonic receiving means opposite to each other at a fixed interval, maintaining the space between said transmitting means and said receiving means free of bubbles, transmitting an ultra-sonic wave from said transmitting means to said receiving means, and detecting the presence or absence of small particles in said space by the attenuation or lack of attenuation of said ultra-sonic wave.
Claim 3
Independent Claim
96 words
An apparatus for detecting small particles in a tank, comprising a tank, an ultra-sonic transmitting means provided in said tank, an ultra-sonic receiving means also provided in said tank oppositely to said ultra-sonic transmitting means at a fixed distance therefrom, and a plate for preventing bubbles from entering the space between said transmitting means and said receiving means whereby the presence or absence of said particles between said transmitting means and said receiving means is detected by the attenuation or lack of attenuation of an ultra-sonic wave transmitted from said transmitting means to said receiving means.
Claim 4
Independent Claim
96 words
An apparatus for detecting small particles in a tank, comprising a tank, an ultra-sonic transmitting means provided in said tank, an ultra-sonic receiving means also provided in said tank oppositely to said ultra-sonic transmitting means at a fixed distance therefrom, and a plate for preventing bubbles from entering the space between said transmitting means and said receiving means whereby the presence or absence of said particles between said transmitting means and said receiving means is detected by the attenuation or lack of attenuation of an ultra-sonic wave transmitted from said transmitting means to said receiving means.
Claim 5
Dependent Claim
40 words
The apparatus defined in claim 2, wherein said transmitting means and said receiving means are in the form of rods connected at one end respectively to an ultra-sonic transmitter means and an ultra-sonic receiving means located outside of said tank.
Claim 6
Dependent Claim
26 words
The apparatus defined in claim 3, wherein said plate for preventing the bubbles from entering said space is provided on an extension of a transmitting rod.
Claim 7
Dependent Claim
28 words
The apparatus defined in claim 3, wherein the other end of said transmitting rod and the other end of said receiving rod have inclined faces in opposing relation.
Claim 8
Dependent Claim
30 words
The apparatus defined in claim 3, wherein a member having an inclined face is disposed on said extension of said transmitting rod and on an extension of said receiving rod.
Claim 9
Dependent Claim
24 words
The apparatus defined in claim 2, wherein said transmitting means is an ultra-sonic transmitter connected to a lead wire leading out of said tank.
Claim 10
Dependent Claim
24 words
The apparatus defined in claim 2, wherein said receiving means is an ultra-sonic receiver connected to a lead wire leading out of said tank.
Claim 11
Dependent Claim
46 words
The apparatus defined in claim 3, wherein said rods are supported in parallel relation by at least two members which are welded to said rods and connected with each other in such a manner that the connection between said members absorbs the stress of said rods.
Claim 12
Dependent Claim
24 words
The apparatus of claim 2 wherein a plurality of ultrasonic transmitting means and ultra-sonic receiving means are disposed in said tank at different levels.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |