US3734271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band conveyer on an air cushion
Assignee: Individual
•
Filing: 1972-03-01
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Granted: 1973-05-22
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Expires: 1992-03-01
Abstract
Abstract The conveyer comprises a continuous band whose operating and idle strands are moved in separate closed troughs interconnected by air-supply pipe lines to successively form an air cushion under both strands of the band with the aid of one fan.
Inventors
- 👤 A Alexandrovich
- 👤 P Onokhov
- 👤 J Makhover
- 👤 A Gudovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:27
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/60; B65G2201/00; B65G2201/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A band conveyer on an air cushion, comprising a base; a driving drum mounted at an end portion of said base; a tensioning drum mounted at the opposite end portion of said base; a flexible continuous band embracing said drums and driven by said driving drum; a first closed trough in which the upper operating strand of said band is moved to carry the material being transported; at least one fan mounted on said base; said first trough connected in its lower portion with a force port of said fan to provide an air cushion under said operating strand of the band; a second closed trough in which the lower idle strand of said band is moved; air-supply pipe lines connecting the lower portion of said second trough with said first trough to discharge the air from the latter to under said idle strand of the band; at least one exhaust port made in said second trough.
Claim 2
Dependent Claim
157 words
A band conveyer on an air cushion, comprising a base; a driving drum mounted at an end portion of said base; a tensioning drum mounted at the opposite end portion of said base; a flexible continuous band embracing said drums and driven by said driving drum; a first closed trough in which the upper operating strand of said band is moved to carry the material being transported; at least one fan mounted on said base; said first trough connected in its lower portion with a force port of said fan to provide an air cushion under said operating strand of the band; a second closed trough in which the lower idle strand of said band is moved; air-supply pipe lines connecting the lower portion of said second trough with said first trough to discharge the air from the latter to under said idle strand of the band; at least one exhaust port made in said second trough.
Claim 3
Dependent Claim
22 words
A band conveyer as claimed in claim 1, wherein both said troughs are enclosed in a common casing forming air-supply pipe lines.
Claim 4
Dependent Claim
40 words
A band conveyer as claimed in claim 1, wherein, in order to provide a closed circulation of air, said exhaust port of the second trough is connected with the intake port of said fan forcing air into said first trough.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |