Patent US3090328A successfully refreshed from Google Patents.
US3090328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transportation systems
Assignee: Honeywell Inc
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Filing: 1961-09-15
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Granted: 1963-05-21
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Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Berggren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
B; B61; B61B; B61B13/00; B61B13/12; B61B13/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A DEVICE OF THE CHARACTER DESCRIBED COMPRISING A TUBE THROUGH WHICH CARS OR VEHICLES ARE ADAPTED TO MOVE; A CAR OR VEHICLE WITHIN SAID TUBE HAVING PROPULSION MEANS, SAID CAR EXTERIOR CONFORMING ADJACENT ITS FRONT END WITH RESPECT TO ITS DIRECTION OF PROPULSION AND FOR A CONSIDERABLE LENGTH TOWARD THE REAR TO THE INSIDE OF THE TUBE AND HAVING A SMALLER DIAMETER THAN THE TUBE TO PROVIDE FOR PASSAGE OF AIR BETWEEN THE CAR AND THE TUBE, SAID CAR HAVING A PORTION THEREOF ADJACENT THE REAR END AND OVER A SUBSTANTIAL PORTION SUCH AS A SEMICIRCULAR PORTION OF THE BOTTOM ENLARGED TRANSVERSELY OF THE CAR TO SUBSTANTIALLY PREVENT RELATIVE PASSAGE OF AIR BETWEEN THIS PORTION OF THE VEHICLE AND THE TUBE WALL AND THUS SUBSTANTIALLY PREVENT RELATIVE MOTION OF AIR RELATIVE TO THE VEHICLE, WHEREBY AT HIGH SPEED OF PROPULSION AND RELATIVE MOTION OF AIR AND THE VEHICLE OVER THE UPPER PORTION OF THE VEHICLE, THE VEHICLE OR CAR IS SUPPORTED ON AIR WITHIN THE TUBE BY THE BERNOULLI EFFECT CAUSED BY THE DECREASE IN STATIC PRESSURE OF THE AIR AT THE TOP OF THE CAR AND THE INCREASE IN STATIC PRESSURE ON THE BOTTOM OF THE CAR.
Claim 2
Independent Claim
198 words
A DEVICE OF THE CHARACTER DESCRIBED COMPRISING A TUBE THROUGH WHICH CARS OR VEHICLES ARE ADAPTED TO MOVE; A CAR OR VEHICLE WITHIN SAID TUBE HAVING PROPULSION MEANS, SAID CAR EXTERIOR CONFORMING ADJACENT ITS FRONT END WITH RESPECT TO ITS DIRECTION OF PROPULSION AND FOR A CONSIDERABLE LENGTH TOWARD THE REAR TO THE INSIDE OF THE TUBE AND HAVING A SMALLER DIAMETER THAN THE TUBE TO PROVIDE FOR PASSAGE OF AIR BETWEEN THE CAR AND THE TUBE, SAID CAR HAVING A PORTION THEREOF ADJACENT THE REAR END AND OVER A SUBSTANTIAL PORTION SUCH AS A SEMICIRCULAR PORTION OF THE BOTTOM ENLARGED TRANSVERSELY OF THE CAR TO SUBSTANTIALLY PREVENT RELATIVE PASSAGE OF AIR BETWEEN THIS PORTION OF THE VEHICLE AND THE TUBE WALL AND THUS SUBSTANTIALLY PREVENT RELATIVE MOTION OF AIR RELATIVE TO THE VEHICLE, WHEREBY AT HIGH SPEED OF PROPULSION AND RELATIVE MOTION OF AIR AND THE VEHICLE OVER THE UPPER PORTION OF THE VEHICLE, THE VEHICLE OR CAR IS SUPPORTED ON AIR WITHIN THE TUBE BY THE BERNOULLI EFFECT CAUSED BY THE DECREASE IN STATIC PRESSURE OF THE AIR AT THE TOP OF THE CAR AND THE INCREASE IN STATIC PRESSURE ON THE BOTTOM OF THE CAR.
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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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |