US4154111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cotton dust analyzer
Assignee: United States Department of Agriculture
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Filing: 1978-04-04
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Granted: 1979-05-15
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Expires: 1998-04-04
Abstract
Abstract An apparatus for sampling dust from lint cotton is disclosed. Air is blown through a known sample of lint cotton positioned in a holding fixture to remove the dust. A suction means is provided to move and direct the dust removed from the lint cotton sample to a filtering means which gathers the dust for subsequent weighing. This accurate dust sample is then used to program experiments for improving the health and safety conditions in the lint cotton process as well as the efficiency of the machinery used in lint cotton processing.
Inventors
- 👤 Joe D. Anderson
- 👤 Roy V. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:44
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2202; G01N1/2205; G01N2001/222; G01N2001/2223
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
284 words
An apparatus for extracting cotton dust for the purpose of determining dust generation potential of a lint cotton specimen comprising in combination: (a) a sample holding means containing a lint cotton sample which is impregnated with dust; (b) a means of blowing air through said lint cotton sample and removing the dust from said lint cotton, said air blowing means located adjacent and parallel to said sample holding means; (c) a filtering means to capture said dust removed from said sample, said filtering means located adjacent and parallel to said sample holding means and on the opposing side of said sample holding means from said air blowing means; (d) a suction means to move the dust laden air which is blown from the lint cotton sample and direct said dust to said filtering means where said dust is captured by a filter of said filtering means; (e) an enclosure around the above to enclosed said apparatus from the atmosphere and provide for air flow through said apparatus, said enclosure comprising: (1) a filtered opening at the upstream end allowing for air suction; and, (2) an exhaust opening at the down stream end of the apparatus; (f) a means of changing said sample and said filter comprising: (1) an interface where said enclosure separates into two parts, said interface located at the approximate location of said sample holding means; (2) a set of double acting air cylinders mounted on said enclosure in a vertical position on each side of said filter and said sample holding means, said air cylinders being parallel and adjacent to said filter and said sample holding means, said air cylinders provided to raise and lower the top part of said enclosure.
Claim 2
Independent Claim
284 words
An apparatus for extracting cotton dust for the purpose of determining dust generation potential of a lint cotton specimen comprising in combination: (a) a sample holding means containing a lint cotton sample which is impregnated with dust; (b) a means of blowing air through said lint cotton sample and removing the dust from said lint cotton, said air blowing means located adjacent and parallel to said sample holding means; (c) a filtering means to capture said dust removed from said sample, said filtering means located adjacent and parallel to said sample holding means and on the opposing side of said sample holding means from said air blowing means; (d) a suction means to move the dust laden air which is blown from the lint cotton sample and direct said dust to said filtering means where said dust is captured by a filter of said filtering means; (e) an enclosure around the above to enclosed said apparatus from the atmosphere and provide for air flow through said apparatus, said enclosure comprising: (1) a filtered opening at the upstream end allowing for air suction; and, (2) an exhaust opening at the down stream end of the apparatus; (f) a means of changing said sample and said filter comprising: (1) an interface where said enclosure separates into two parts, said interface located at the approximate location of said sample holding means; (2) a set of double acting air cylinders mounted on said enclosure in a vertical position on each side of said filter and said sample holding means, said air cylinders being parallel and adjacent to said filter and said sample holding means, said air cylinders provided to raise and lower the top part of said enclosure.
Claim 3
Dependent Claim
50 words
The apparatus of claim 1 wherein the sample holding means comprises in combination a top holding screen in parallel with a bottom holding screen, said sample held in-between and said bottom holding screen sized to allow specific dust sized particles to pass through when air is blown through said sample.
Claim 4
Dependent Claim
100 words
The apparatus of claim 1 including a means of automatically moving the air blowing means back and forth comprising in combination: (a) a first chain drive affixed to said air blowing means; (b) a second chain drive communicating with said first chain drive; (c) an anti-backlash reversing drive, driving said second chain drive backward and forward. (d) a third chain drive connecting said reversing drive and a gear motor; (e) a set of parallel guide rails to guide said air blowing means backward and forward; (f) a set of micro switches to reverse the motion on said air blowing means.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1 wherein the top part of the enclosure is raised and lowered approximately 6 to 8 inches for top and bottom enclosure separation.
References Cited (Backward Citations)
US1704418A
Cited
US2237417A
Cited
US2509264A
Cited
US3309518A
Cited
US3608379A
Cited
US3572128A
Cited
US3748905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |