US3769660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bur extractor
Assignee: TRIANGLE MANUFACTURING Co
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Filing: 1972-05-23
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Granted: 1973-11-06
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Expires: 1992-05-23
Abstract
Abstract A pneumatic conveyor moves unprocessed cotton upward through a generally inverted U-shaped inlet chute. Included in the chute is an air separator that reduces air flow in a low velocity leg through which unprocessed cotton gravitates toward a bur extractor. Within the low velocity leg is a throat region and access door to facilitate manual removal of large contaminants like sagebrush. A fan, discharging air tangent to one wall of an outlet chute, generates a suction in a space defining an outlet in the bur extractor for conveying processed cotton to storage.
Inventors
- 👤 R Schuette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
D; D01; D01B; D01B1/00; D01B1/02; D01B1/04; D01B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A bur extractor comprising: an inlet chute having generally an inverted U-shaped, an inlet fan connected with said chute upstream from said perforate section to create a high pressure leg to pneumatically convey unprocessed cotton upward, means for moving unprocessed cotton into said inlet chute at a position between said inlet fan and said perforate section for conveyance upward, a pressure reducing means including an upper perforate section in the inlet chute to reduce the pressure to essentially atmospheric and thus, create a low pressure leg through which unprocessed cotton gravitates, bur separation means connected with and receiving unprocessed cotton from the low pressure leg, an outlet conveyor connected with the bur separation means to convey processed cotton to storage said outlet conveyor comprising: an outlet chute extending upward from the bur separation means, a fan connected with said outlet chute to generate air flow substantially tangent to one wall thereof and adjacent a space defining a processed cotton outlet from the bur separation means to generate a suction in said space to draw processed cotton into the outlet chute and prevent backflow of air through the bur separation means.
Claim 2
Dependent Claim
190 words
A bur extractor comprising: an inlet chute having generally an inverted U-shaped, an inlet fan connected with said chute upstream from said perforate section to create a high pressure leg to pneumatically convey unprocessed cotton upward, means for moving unprocessed cotton into said inlet chute at a position between said inlet fan and said perforate section for conveyance upward, a pressure reducing means including an upper perforate section in the inlet chute to reduce the pressure to essentially atmospheric and thus, create a low pressure leg through which unprocessed cotton gravitates, bur separation means connected with and receiving unprocessed cotton from the low pressure leg, an outlet conveyor connected with the bur separation means to convey processed cotton to storage said outlet conveyor comprising: an outlet chute extending upward from the bur separation means, a fan connected with said outlet chute to generate air flow substantially tangent to one wall thereof and adjacent a space defining a processed cotton outlet from the bur separation means to generate a suction in said space to draw processed cotton into the outlet chute and prevent backflow of air through the bur separation 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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |