US3704076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw feeder for paste-like materials
Assignee: SEVERODONETSKY FILIAL NIIHIMMASH
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Filing: 1970-12-16
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Granted: 1972-11-28
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Expires: 1990-12-16
Abstract
Abstract A screw feeder used for batching paste-like materials, having batching and charging chambers, the batching chamber accommodating a screw conveyor used to displace the material and having a cylindrical spiral eccentrically secured thereto, the turns of the spiral being disposed inbetween the tunrs of the lower portion of the screw conveyor and, in the course of rotation, cleaning the screw conveyor of the material adhered thereto.
Inventors
- 👤 Igor Vasilievich Bodunov
- 👤 Boris Sergeevich Modestov
- 👤 Viktor Vasilievich Ivanchenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:24
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/46
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
A screw feeder for paste-like material comprising: a housing having a charging chamber and a batching chamber; a rotatable screw conveyor having material displacing threads disposed in said batching chamber for displacing said material; a tubular member extending through said batching chamber and eccentrically receiving said screw conveyor, said tubular member being rotatable at an angular speed which is a multiple of the annular speed of said screw conveyor; scraping helical turns, formed on said tubular member and extending longitudinally substantially along the entire length thereof and being disposed between said material displacing threads of the screw conveyor in the lower portion thereof for cleaning from the displacing threads material adhering thereto during the course of rotation, said scraping helical turns having a pitch corresponding to the pitch of said material displacing threads; and means for synchronously rotating said screw conveyor and said tubular member.
Claim 2
Dependent Claim
145 words
A screw feeder for paste-like material comprising: a housing having a charging chamber and a batching chamber; a rotatable screw conveyor having material displacing threads disposed in said batching chamber for displacing said material; a tubular member extending through said batching chamber and eccentrically receiving said screw conveyor, said tubular member being rotatable at an angular speed which is a multiple of the annular speed of said screw conveyor; scraping helical turns, formed on said tubular member and extending longitudinally substantially along the entire length thereof and being disposed between said material displacing threads of the screw conveyor in the lower portion thereof for cleaning from the displacing threads material adhering thereto during the course of rotation, said scraping helical turns having a pitch corresponding to the pitch of said material displacing threads; and means for synchronously rotating said screw conveyor and said tubular member.
Claim 3
Dependent Claim
46 words
The screw feeder according to claim 1 wherein said screw conveyor and said tubular member having an angular speed relationship inversely proportioned to their respective pitches, and a distributor box for imparting the same direction of rotation to said screw conveyor and to said tubular member.
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |