US3833118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain cleaning device
Assignee: Gilmore and Tatge Manufacturing Co Inc
•
Filing: 1972-12-21
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Granted: 1974-09-03
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Expires: 1992-12-21
Abstract
Abstract A grain cleaning device for removing ''''fines'''' such as broken kernels, hulls, dust and the like from grain, including a tube through which grain is moved with a whirling motion and in an elevated air pressure, the tube having an opening to the atmosphere at its periphery obstructed by a perforated screen, so that the fines are removed from grain through said opening by both centrifugal force and by air flow. The screen is interchangeable with others having different perforation sizes, for use with grains having other kernel sizes, so as to prevent passage of whole kernels but to permit passage of fines.
Inventors
- 👤 M Gilmore
- 👤 R Chaffee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:21
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/06; B07B7/08; B07B7/083; F; F26; F26B; F26B17/00; F26B17/12; F26B17/122; F26B17/124; F26B9/00; F26B9/06; F26B9/08; F26B9/082; F26B9/085
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A device for cleaning kernel fragments, hulls and other small debris, denoted ''''fines'''', from grain, comprising: a. a tube having an aperture formed in the wall thereof, b. a perforated screen covering said opening, c. means operable to move grain to be cleaned through said tube, and d. means operable to provide an atmosphere of positively elevated air pressure within said tube, whereby as said grain passes through said tube, the resulting outward current of air through said screen will carry said fines with it, the perforations of said screen being too small to pass whole kernels of grain.
Claim 2
Independent Claim
99 words
A device for cleaning kernel fragments, hulls and other small debris, denoted ''''fines'''', from grain, comprising: a. a tube having an aperture formed in the wall thereof, b. a perforated screen covering said opening, c. means operable to move grain to be cleaned through said tube, and d. means operable to provide an atmosphere of positively elevated air pressure within said tube, whereby as said grain passes through said tube, the resulting outward current of air through said screen will carry said fines with it, the perforations of said screen being too small to pass whole kernels of grain.
Claim 3
Dependent Claim
51 words
A device as recited in claim 1 with the addition of means operable to impart to the grain moving through said tube a whirling motion about the axis of said tube, whereby as said grain moves past said aperture, said fines are additionally driven outwardly through said screen by centrifugal force.
Claim 4
Dependent Claim
50 words
A device as recited in claim 2 wherein said tube is vertical, and wherein said means for moving grain through said tube comprises an auger mounted coaxially within said tube for rotation therein, and means operable to rotate said auger to elevate grain in said tube past the aperture thereof.
Claim 5
Dependent Claim
46 words
A device as recited in claim 1 wherein said means for providing an elevated air pressure within said tube comprises a blower fan operable to deliver air to said tube at the end thereof at which grain enters, and means operable to drive said blower fan.
Claim 6
Dependent Claim
69 words
A device as recited in claim 1 with the addition of: a. a housing disposed externally of said tube and having an open side covering the opening of said tube, whereby to receive said fines, said screen being disposed between said housing and said tube, b. means affixing said housing to said tube, and c. means operable to convey said fines from said housing to a point of disposal.
Claim 7
Dependent Claim
32 words
A device as recited in claim 5 wherein said screen member is detachably mounted between said tube and said housing, whereby to be interchangeable with other screens having perforations of other sizes.
Claim 8
Dependent Claim
45 words
A device as recited in claim 6 wherein said means affixing said housing to said tube disposes said housing spaced apart from said tube by a distance generally equal to the thickness of said screen, said screen being slidably insertable between the tube and housing.
Claim 9
Dependent Claim
27 words
A device as recited in claim 7 wherein said tube is cylindrical, and wherein said screen is cylindrically curved for ready insertion between said tube and housing.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |