Patent US3904313A successfully refreshed from Google Patents.
US3904313A
Expired / Lapsed
US
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Higher harmonics hub valve
Assignee: Individual
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Filing: 1973-11-05
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Granted: 1975-09-09
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Expires: 1993-11-05
Abstract
Abstract A hub valve for a circulation control rotor having the inherent capability of producing pulses of air at a given frequency and at harmonics of that frequency. The valve comprises a series of diaphragm or other seals, one for each blade, at the inlet to the air passage in the blade. Each seal is connected by means of a connecting rod to a crankpin on the end of a crankarm. The crankarm is fixed to a support and control shaft in the middle of the hub. The rotational speed of the hub determines the primary frequency of the airflow pulses; the connecting rod and crankarm mechanism superimpose harmonics onto this primary frequency.
Inventors
- 👤 Henry J Bernaerts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:05
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/325
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A hub assembly for a circulation control rotor comprising: a hollow drive shaft; a rotating outer hub meMber surrounding said hollow drive shaft and having a plurality of fluid outlets therein having radial axes, said rotating outer hub member being connected to said hollow drive shaft to form a fluid passage; a central shaft; individual movable sealing members connected to each of said fluid outlets aligned with said outlets and movable along their axes; and, means attached to said central shaft and angularly adjustable about the axis of said central shaft for moving said sealing members sequentially at a plurality of superimposed frequencies during opening.
Claim 2
Dependent Claim
105 words
A hub assembly for a circulation control rotor comprising: a hollow drive shaft; a rotating outer hub meMber surrounding said hollow drive shaft and having a plurality of fluid outlets therein having radial axes, said rotating outer hub member being connected to said hollow drive shaft to form a fluid passage; a central shaft; individual movable sealing members connected to each of said fluid outlets aligned with said outlets and movable along their axes; and, means attached to said central shaft and angularly adjustable about the axis of said central shaft for moving said sealing members sequentially at a plurality of superimposed frequencies during opening.
Claim 3
Dependent Claim
38 words
A hub assembly as in claim 1 wherein said means for moving said sealing members comprises a single crank arm on said central shaft and a connecting rod joined to each sealing member and to said crank arm.
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |