Patent US3690183A successfully refreshed from Google Patents.
US3690183A
Expired / Lapsed
US
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Method and apparatus for testing fine aggregate samples
Assignee: Builders Sand Co
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Filing: 1970-10-15
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Granted: 1972-09-12
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Expires: 1990-10-15
Abstract
Abstract A method and apparatus for testing a fine aggregate sample wherein a measured quantity of the aggregate is introduced into the inner cylindrical sizing screen of a series thereof of decreasing mesh fineness and then liquid is introduced into the interior of the inner screen while the series thereof along with a casing around the screens are constantly rotated to effect segregation of the particles of aggregate. Manifold structure at one end of the screens directs particles retained within a particular screen into a respective perforated volumetric measuring cup with the liquid introduced serving not only to facilitate segregation of the particles but also operating to flush all particles retained by each screen from the surface thereof. Since the web volume of each segregated sample collected bears a mathematical relationship to the amount thereof in the original dry sample, the percentage of each size range of particles in the aggregate composition being sampled can be quickly and easily determined using an empirically derived table or slide rule.
Inventors
- 👤 Harry Harlan Livingood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:10
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/02; G01N15/0272
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
318 words
Apparatus for testing a fine aggregate composition containing particles of different sizes comprising: separation structure adapted to receive a measured quantity of said composition as a sample thereof and including a series of generally cylindrical screen units in spaced, telescoped relationship having screen portions of different relative screen mesh sizes respectively, the unit having the coarsest mesh screen portion being located in the innermost position relative to the remaining screen units, said screen units being disposed for receipt of the sample on said unit having the coarsest screen mesh portion and being arranged in serial order of increasing fineness of screen mesh so that the particles of said sample are segregated as to size since all but those particles retained by the screen portion of a respective screen unit pass therethrough to the next adjacent screen unit; a casing located in surrounding relationship to the outermost screen unit of said series thereof; means for directing a liquid against the particle retaining portion of each screen unit to flush particles therefrom that have been retained thereon; volumetric measuring means including a receptacle for the casing and each screen unit having a screen mesh portion of a different size than other screen units, said volumetric collecting means collecting the particles flushed from each screen unit respectively for permitting rapid determination of the corresponding volumes thereof with respect to the initial volume of said measured quantity of said aggregate composition, each of said receptacles containing openings therein located to prevent accumulation of liquid in a respective receptacle; and manifold means operably associated with said screen units and the casing for directing particles flushed from respective screen units and the casing into corresponding volumetric measuring means, said manifold means being provided with guide surfaces leading from the spaces between respective adjacent pairs of screen units as well as the space between the outermost screen unit and the casing, directly to corresponding receptacles.
Claim 2
Dependent Claim
318 words
Apparatus for testing a fine aggregate composition containing particles of different sizes comprising: separation structure adapted to receive a measured quantity of said composition as a sample thereof and including a series of generally cylindrical screen units in spaced, telescoped relationship having screen portions of different relative screen mesh sizes respectively, the unit having the coarsest mesh screen portion being located in the innermost position relative to the remaining screen units, said screen units being disposed for receipt of the sample on said unit having the coarsest screen mesh portion and being arranged in serial order of increasing fineness of screen mesh so that the particles of said sample are segregated as to size since all but those particles retained by the screen portion of a respective screen unit pass therethrough to the next adjacent screen unit; a casing located in surrounding relationship to the outermost screen unit of said series thereof; means for directing a liquid against the particle retaining portion of each screen unit to flush particles therefrom that have been retained thereon; volumetric measuring means including a receptacle for the casing and each screen unit having a screen mesh portion of a different size than other screen units, said volumetric collecting means collecting the particles flushed from each screen unit respectively for permitting rapid determination of the corresponding volumes thereof with respect to the initial volume of said measured quantity of said aggregate composition, each of said receptacles containing openings therein located to prevent accumulation of liquid in a respective receptacle; and manifold means operably associated with said screen units and the casing for directing particles flushed from respective screen units and the casing into corresponding volumetric measuring means, said manifold means being provided with guide surfaces leading from the spaces between respective adjacent pairs of screen units as well as the space between the outermost screen unit and the casing, directly to corresponding receptacles.
Claim 3
Dependent Claim
73 words
Apparatus as set forth in claim 1, wherein is provided a support plate removably carried by said casing remote from the screen units, said manifold means being located between the screen units and said support plate, there being a series of carriers on said support plate for removably receiving respective receptacles and disposed to support the receptacles in locations to receive aggregate particles delivered thereto from said screen units via the manifold means.
Claim 4
Dependent Claim
29 words
Apparatus as set forth in claim 2, wherein said receptacles are each constructed of screen material for free flow of liquid therethrough while retaining particles of aggregate delivered therein.
Claim 5
Dependent Claim
46 words
Apparatus as set forth in claim 2, wherein said support plate is provided with a tubular delivery element for receiving said quantity of aggregate, said manifold means having a passage therethrough located to communicate the tubular delivery element with the interior of the innermost screen element.
Claim 6
Dependent Claim
26 words
Apparatus as set forth in claim 4, wherein is provided gate means in said tubular element for controlling a release of said quantity of aggregate therefrom.
Claim 7
Dependent Claim
43 words
Apparatus as set forth in claim 5, wherein said tubular element is of a size to contain said predetermined quantity of aggregate when the gate means is in diSposition preventing delivery of said aggregate to the innermost screen unit from said tubular element.
Claim 8
Dependent Claim
280 words
Apparatus for testing a fine aggregate composition containing particles of different sizes comprising: separation structure adapted to receive a measured quantity of said composition as a sample thereof and including a series of generally cylindrical screen units in spaced, telescoped relationship having screen portions of different relative screen mesh sizes respectively, the unit having the coarsest mesh screen portion being located in the innermost position relative to the remaining screen units, said screen units being disposed for receipt of the sample on said unit having the coarsest screen mesh portion and being arranged in serial order of increasing fineness of screen mesh so that the particles of said sample are segregated as to size since all but those particles retained by the screen portion of a respective screen unit pass therethrough to the next adjacent screen unit; a casing located in surrounding relationship to the outermost screen unit of said series thereof; means mounting said casing for swinging movement about an axis transverse to the longitudinal axis thereof to facilitate loading and unloading of the structure; means for directing a liquid against the particle retaining portion of each screen unit to flush particles therefrom that have been retained thereon; volumetric measuring means for collecting the particles flushed from each screen unit respectively for permitting rapid determination of the corresponding volumes thereof with respect to the initial volume of said measured quantity of said aggregate composition, each of said receptacles containing openings therein located to prevent accumulation of liquid in a respective receptacle; and manifold means operably associated with said screen units and the casing for directing particles flushed from respective screen units and the casing into corresponding volumetric measuring means.
Claim 9
Dependent Claim
280 words
Apparatus for testing a fine aggregate composition containing particles of different sizes comprising: separation structure adapted to receive a measured quantity of said composition as a sample thereof and including a series of generally cylindrical screen units in spaced, telescoped relationship having screen portions of different relative screen mesh sizes respectively, the unit having the coarsest mesh screen portion being located in the innermost position relative to the remaining screen units, said screen units being disposed for receipt of the sample on said unit having the coarsest screen mesh portion and being arranged in serial order of increasing fineness of screen mesh so that the particles of said sample are segregated as to size since all but those particles retained by the screen portion of a respective screen unit pass therethrough to the next adjacent screen unit; a casing located in surrounding relationship to the outermost screen unit of said series thereof; means mounting said casing for swinging movement about an axis transverse to the longitudinal axis thereof to facilitate loading and unloading of the structure; means for directing a liquid against the particle retaining portion of each screen unit to flush particles therefrom that have been retained thereon; volumetric measuring means for collecting the particles flushed from each screen unit respectively for permitting rapid determination of the corresponding volumes thereof with respect to the initial volume of said measured quantity of said aggregate composition, each of said receptacles containing openings therein located to prevent accumulation of liquid in a respective receptacle; and manifold means operably associated with said screen units and the casing for directing particles flushed from respective screen units and the casing into corresponding volumetric measuring means.
Claim 10
Dependent Claim
296 words
Apparatus for testing a fine aggregate composition containing particles of different sizes comprising: separation structure adapted to receive a measured quantity of said composition as a sample thereof and including a series of generally cylindrical screen units in spaced, telescoped relationship having screen portions of different relative screen mesh sizes respectively, the unit having the coarsest mesh screen portion being located in the innermost position relative to the remaining screen units, said screen units being disposed for receipt of the sample on said unit having the coarsest screen mesh portion and being arranged in serial order of increasing fineness of screen mesh so that the particles of said sample are segregated as to size since all but those particles retained by the screen portion of a respective screen unit pass therethrough to the next adjacent screen unit; a casing located in surrounding relationship to the outermost screen unit of said series thereof; means mounting said casing for rotation about the longitudinal axis thereof to facilitate segregation of particles by said screen units and for swinging movement about an axis transverse to said longitudinal axis to facilitate loading and unloading of the structure; means for directing a liquid against the particle retaining portion of each screen unit to flush particles therefrom that have been retained thereon; volumetric measuring means for collecting the particles flushed from each screen unit respectively for permitting rapid determination of the corresponding volumes thereof with respect to the initial volume of said measured quantity of said aggregate composition, each of said receptacles containing openings therein located to prevent accumulation of liquid in a respective receptacle; and manifold means operably associated with said screen units and the casing for directing particles flushed from respective screen units and the casing into corresponding volumetric measuring meaNs.
Claim 11
Dependent Claim
296 words
Apparatus for testing a fine aggregate composition containing particles of different sizes comprising: separation structure adapted to receive a measured quantity of said composition as a sample thereof and including a series of generally cylindrical screen units in spaced, telescoped relationship having screen portions of different relative screen mesh sizes respectively, the unit having the coarsest mesh screen portion being located in the innermost position relative to the remaining screen units, said screen units being disposed for receipt of the sample on said unit having the coarsest screen mesh portion and being arranged in serial order of increasing fineness of screen mesh so that the particles of said sample are segregated as to size since all but those particles retained by the screen portion of a respective screen unit pass therethrough to the next adjacent screen unit; a casing located in surrounding relationship to the outermost screen unit of said series thereof; means mounting said casing for rotation about the longitudinal axis thereof to facilitate segregation of particles by said screen units and for swinging movement about an axis transverse to said longitudinal axis to facilitate loading and unloading of the structure; means for directing a liquid against the particle retaining portion of each screen unit to flush particles therefrom that have been retained thereon; volumetric measuring means for collecting the particles flushed from each screen unit respectively for permitting rapid determination of the corresponding volumes thereof with respect to the initial volume of said measured quantity of said aggregate composition, each of said receptacles containing openings therein located to prevent accumulation of liquid in a respective receptacle; and manifold means operably associated with said screen units and the casing for directing particles flushed from respective screen units and the casing into corresponding volumetric measuring meaNs.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |