US3788146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for analysing the grain classification of a soil sample
Assignee: Ballast Nedam NV
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Filing: 1972-05-09
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Granted: 1974-01-29
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Expires: 1992-05-09
Abstract
Abstract A device for analysing the grain classification of soil samples includes sedimentation and compensation pipes, both of which are filled to a common level with liquid. A pressure difference pick up device connects the compensation pipe to the sedimentation pipe at a region above the lower end of the latter and provision is made for dumping a soil sample into the sedimentation pipe. After the sample is dumped, the levels of liquid in the two pipes are equalized either by means of an overflow pipe and stop valve connected with the sedimentation pipe or by a throttle flow connection between the two pipes.
Inventors
- 👤 C Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:57
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/04; G01N33/00; G01N33/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
124 words
A device for analysing the grain classification of soil samples comprising, in combination: a vertically disposed sedimentation pipe having a closed lower end; a vertically disposed compensation pipe; a pressure difference pick up device connecting said compensation pipe with said sedimentation pipe, said sedimentation pipe and said compensation pipe being filled with liquid to a common height which is above said pressure difference pick up device; measuring means connected with said pressure difference pick up device for measuring pressure differences sensed thereby; means for dumping a soil sample into the liquid in said sedimentation pipe; and levelling means for equalizing the levels of liquid in said sedimentation and compensation pipes after a soil sample has been dumped and during measurement by said measuring means.
Claim 2
Independent Claim
124 words
A device for analysing the grain classification of soil samples comprising, in combination: a vertically disposed sedimentation pipe having a closed lower end; a vertically disposed compensation pipe; a pressure difference pick up device connecting said compensation pipe with said sedimentation pipe, said sedimentation pipe and said compensation pipe being filled with liquid to a common height which is above said pressure difference pick up device; measuring means connected with said pressure difference pick up device for measuring pressure differences sensed thereby; means for dumping a soil sample into the liquid in said sedimentation pipe; and levelling means for equalizing the levels of liquid in said sedimentation and compensation pipes after a soil sample has been dumped and during measurement by said measuring means.
Claim 3
Dependent Claim
26 words
A device according to claim 1 wherein said levelling means comprises a flow connection between said compensation pipe and the upper region of said sedimentation pipe.
Claim 4
Dependent Claim
13 words
A device according to claim 2 wherein said flow connection includes a throttle.
Claim 5
Dependent Claim
19 words
A device according to claim 1 wherein said levelling means comprises an overflow pipe connected to said sedimentation pipe.
Claim 6
Dependent Claim
19 words
A device according to claim 4 wherein said levelling means further comprises a stop valve in said overflow pipe.
Claim 7
Dependent Claim
27 words
A device according to claim 5 wherein said pick up device communicates with said sedimentation pipe at a point above said lower end of the sedimentation pipe.
Claim 8
Dependent Claim
27 words
A device according to claim 4 wherein said pick up device communicates with said sedimentation pipe at a point above said lower end of the sedimentation pipe.
Claim 9
Dependent Claim
27 words
A device according to claim 3 wherein said pick up device communicates with said sedimentation pipe at a point above said lower end of the sedimentation pipe.
Claim 10
Dependent Claim
27 words
A device according to claim 2 wherein said pick up device communicates with said sedimentation pipe at a point above said lower end of the sedimentation pipe.
Claim 11
Dependent Claim
27 words
A device according to claim 1 wherein said pick up device communicates with said sedimentation pipe at a point above said lower end of the sedimentatin pipe.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |