US3149803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tethered hovering platform
Assignee: US Industries Inc
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Filing: 1961-07-19
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Granted: 1964-09-22
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Expires: 1981-07-19
Abstract
No abstract record available.
Inventors
- 👤 Petrides Thracy
- 👤 Wilfred P Stapelfeld
- 👤 Stroukoff Oleg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:18
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/02; B64C39/022
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
152 words
A TETHERED HOVERING PLATFORM COMPRISING A SYMMETRICAL BODY MEMBER, TWO COAXIALLY ROTATABLE DRIVEN SHAFTS EXTENDING VERTICALLY THROUGH SAID BODY MEMBER, LIFTING BLADES MOUNTED ON THE UPPER END OF EACH SAID DRIVEN SHAFT, ELECTRIC MOTOR MEANS FOR ROTATING SAID SHAFTS IN OPPOSITE DIRECTIONS, A SHROUD SURROUNDING THE LOWER PART OF SAID BODY MEMBER, ROTATABLE CONTROL BLADES EXTENDING INTO A DUCT FORMED BETWEEN SAID BODY MEMBER AND SAID SHROUD AND BEING ROTATED BY SAID ELECTRIC MOTOR MEANS, MOVABLE CONTROL VANES MOUNTED IN SAID DUCT AND IN THE DOWNWASH AREA OF SAID CONTROL BLADES FOR IMPARTING JAW AND PITCH STABILITY TO SAID PLATFORM, A TETHERING YOKE GIMBALED ONTO SAID BODY MEMBER THROUGH SUBSTANTIALLY THE CENTER OF GRAVITY OF SAID HOVERING PLATFORM, AND CABLE MEANS EXTENDING FROM SAID BODY MEMBER THROUGH SAID YOKE TO AN ELECTRIC POWER SUPPLY UNIT WHEREBY ELECTRIC POWER IS SUPPLIED TO SAID ELECTRIC MOTORS TO ROTATE SAID LIFTING BLADES AND CONTROL BLADES.
Claim 2
Dependent Claim
152 words
A TETHERED HOVERING PLATFORM COMPRISING A SYMMETRICAL BODY MEMBER, TWO COAXIALLY ROTATABLE DRIVEN SHAFTS EXTENDING VERTICALLY THROUGH SAID BODY MEMBER, LIFTING BLADES MOUNTED ON THE UPPER END OF EACH SAID DRIVEN SHAFT, ELECTRIC MOTOR MEANS FOR ROTATING SAID SHAFTS IN OPPOSITE DIRECTIONS, A SHROUD SURROUNDING THE LOWER PART OF SAID BODY MEMBER, ROTATABLE CONTROL BLADES EXTENDING INTO A DUCT FORMED BETWEEN SAID BODY MEMBER AND SAID SHROUD AND BEING ROTATED BY SAID ELECTRIC MOTOR MEANS, MOVABLE CONTROL VANES MOUNTED IN SAID DUCT AND IN THE DOWNWASH AREA OF SAID CONTROL BLADES FOR IMPARTING JAW AND PITCH STABILITY TO SAID PLATFORM, A TETHERING YOKE GIMBALED ONTO SAID BODY MEMBER THROUGH SUBSTANTIALLY THE CENTER OF GRAVITY OF SAID HOVERING PLATFORM, AND CABLE MEANS EXTENDING FROM SAID BODY MEMBER THROUGH SAID YOKE TO AN ELECTRIC POWER SUPPLY UNIT WHEREBY ELECTRIC POWER IS SUPPLIED TO SAID ELECTRIC MOTORS TO ROTATE SAID LIFTING BLADES AND CONTROL BLADES.
Claim 3
Dependent Claim
35 words
A TETHERED HOVERING PLATFORM ACCORDING TO CLAIM 1 HAVING IN ADDITION ALTITUDE RESPONSIVE MEANS FOR VARYING THE SPEED OF ROTATION OF SAID ELECTRIC MOTORS WHEREBY SAID HOVERING PLATFORM WILL MAINTAIN A PREDETERMINED ALTITUDE ABOVE GROUND.
References Cited (Backward Citations)
CA612551A
Cited
US1491997A
Cited
FR864986A
Cited
US2479549A
Cited
US2996269A
Cited
US2995740A
Cited
US3071335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |