Patent US3188884A successfully refreshed from Google Patents.
US3188884A
Expired / Lapsed
US
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Helicopter mechanism
Assignee: Individual
•
Filing: 1963-04-29
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Granted: 1965-06-15
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Bancroft Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:03
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/08; B64C27/10; B64C27/32; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A MECHANISM FOR HELICOPTERS AND THE LIKE INCLUDING A ROTARY POWER INPUT MEMBER AND TWO ROTARY POWER OUTPUT MEMBERS, FIRST PLANETARY GEAR MEANS FOR INTERGEARING SAID OUTPUT MEMBER FOR CONTRAROTATION AND SECOND PLANETARY GEAR MEANS FOR INTERGEARING SAID INPUT MEMBER TO DIFFERENT PORTIONS OF SAID FIRST PLANETARY GEAR MEANS SO THAT THE ROTATIVE SPEEDS OF THE LATTER ARE FREE TO VARY RELATIVE TO SAID INPUT MEMBER WITHOUT AFFECTING THEIR SPEED RATIO RELATIVE TO EACH OTHER.
Claim 2
Dependent Claim
75 words
A MECHANISM FOR HELICOPTERS AND THE LIKE INCLUDING A ROTARY POWER INPUT MEMBER AND TWO ROTARY POWER OUTPUT MEMBERS, FIRST PLANETARY GEAR MEANS FOR INTERGEARING SAID OUTPUT MEMBER FOR CONTRAROTATION AND SECOND PLANETARY GEAR MEANS FOR INTERGEARING SAID INPUT MEMBER TO DIFFERENT PORTIONS OF SAID FIRST PLANETARY GEAR MEANS SO THAT THE ROTATIVE SPEEDS OF THE LATTER ARE FREE TO VARY RELATIVE TO SAID INPUT MEMBER WITHOUT AFFECTING THEIR SPEED RATIO RELATIVE TO EACH OTHER.
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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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |