Patent US3670658A successfully refreshed from Google Patents.
US3670658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transportation system
Assignee: Individual
•
Filing: 1970-07-09
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Granted: 1972-06-20
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Expires: 1990-07-09
Abstract
Abstract A transportation system wherein a plurality of gas filled loadcarrying units having substantially neutral buoyancy are moved through a conduit. Guiding and driving rollers in the conduit guide and drive the units therethrough.
Inventors
- 👤 Mogens Stelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:07
CPC Classifications
B; B64; B64B; B64B1/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A transportation system including: a. at least one cylindrical transportation unit having a load carrying portion and a balloon portion adapted to be filled with a lighter than air gas so that a loaded unit has substantially neutral buoyancy, b. a conduit having a loading end and an unloading end adapted to receive the unit, c. grooves extending longitudinally of the unit, d. rollers mounted on the walls of the conduit arranged in spaced apart groups of four adapted to roll in the grooves for providing lateral and vertical guidance for the unit, at least one roller of some of the groups being a driving roller frictionally engaging the unit; the groups having driving rollers being so spaced that the unit is at all times engaged by a driving roller.
Claim 2
Dependent Claim
130 words
A transportation system including: a. at least one cylindrical transportation unit having a load carrying portion and a balloon portion adapted to be filled with a lighter than air gas so that a loaded unit has substantially neutral buoyancy, b. a conduit having a loading end and an unloading end adapted to receive the unit, c. grooves extending longitudinally of the unit, d. rollers mounted on the walls of the conduit arranged in spaced apart groups of four adapted to roll in the grooves for providing lateral and vertical guidance for the unit, at least one roller of some of the groups being a driving roller frictionally engaging the unit; the groups having driving rollers being so spaced that the unit is at all times engaged by a driving roller.
Claim 3
Dependent Claim
31 words
A transportation system as claimed in claim 1 in which the rollers are inflatable, the driving roller being rubber covered so as to provide a substantially non-slip engagement with the unit.
Claim 4
Dependent Claim
32 words
A transportation system as claimed in claim 1 in which the unit has elastic end portions adapted to expand and contract in relation to variation of gas pressure in the balloon portion.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |