US3706231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbulence and vortex suppression in gyros
Assignee: Boeing North American Inc
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Filing: 1970-10-02
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Granted: 1972-12-19
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Expires: 1990-10-02
Abstract
Abstract A gyro in which the rotor operates in a fluid medium generally has a non-laminar flow causing gyro drift and hence inaccuracy. Certain inventive features are built into the structure of the tyro which minimize vortex or turbulent flow in the fluid medium together with minimization of waviness of vortex or turbulent flow, thereby increasing the drift stability of the gyro.
Inventors
- 👤 Raymond Noar
- 👤 Robert H Tuffias
- 👤 Kenneth P Gow
- 👤 Thomas A Drew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:38
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/20; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1282
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
In an apparatus having an inner housing and a rotor within said inner housing having a web, which rotor is driven in a fluid medium, and structural members positioned within the apparatus for providing laminar flow of said fluid medium therein comprising in combination: means positioned in the hub region of said rotor for constraining vortices thereat; means positioned in the web region of the rotor for limited radial flow of said medium; means in proximity of the web and rim regions of the rotor for reducing vortices in said regions; means positioned opposite the outer peripheral side faces of the rotor for maintaining the flow of said fluid medium in laminar state from the web area of the rotor to the outer periphery thereof along said side faces; means integral with the inner surface of the inner housing positioned opposite to the outer periphery of the rotor for constraining vortex action by producing cancellation of forces due to the vortices occuring between the inner housing and the outer periphery of the rotor; and means attached to the inner surface of the inner housing for reducing turbulent flow in said fluid medium at the outer periphery of the rotor thereby providing laminar flow of said fluid medium.
Claim 2
Dependent Claim
207 words
In an apparatus having an inner housing and a rotor within said inner housing having a web, which rotor is driven in a fluid medium, and structural members positioned within the apparatus for providing laminar flow of said fluid medium therein comprising in combination: means positioned in the hub region of said rotor for constraining vortices thereat; means positioned in the web region of the rotor for limited radial flow of said medium; means in proximity of the web and rim regions of the rotor for reducing vortices in said regions; means positioned opposite the outer peripheral side faces of the rotor for maintaining the flow of said fluid medium in laminar state from the web area of the rotor to the outer periphery thereof along said side faces; means integral with the inner surface of the inner housing positioned opposite to the outer periphery of the rotor for constraining vortex action by producing cancellation of forces due to the vortices occuring between the inner housing and the outer periphery of the rotor; and means attached to the inner surface of the inner housing for reducing turbulent flow in said fluid medium at the outer periphery of the rotor thereby providing laminar flow of said fluid medium.
Claim 3
Dependent Claim
27 words
The invention as stated in claim 1 including: means for constraining vortices occurring between the outer periphery of the rotor and the surfaces of the inner housing.
Claim 4
Dependent Claim
27 words
The invention as stated in claim 1, including: means for providing a reduction in the Reynolds number; and means for providing a reduction in the Taylor number.
Claim 5
Dependent Claim
199 words
The invention as stated in claim 1: means positioned in the hub region of the rotor being radially positioned partially circumjacent said hub region about the outer surface of the hub region of the rotor; means positioned in the web region of the rotor being orthogonally disposed with respect to the face of said web region; means in proximity of the web region of the rotor being angularly disposed with respect to the face of the web of the rotor and the means in proximity of the rim region of the rotor being positioned substantially parallel to the web region of the rotor; means positioned opposite the outer peripheral side faces of the rotor having faces which are positioned parallel to the side faces of the rotor; means integral with the inner surface of the inner housiNg positioned opposite the outer periphery of the rotor forming radial extensions from the peripheral circumference of the inner housing and spaced apart from and circumjacent the outer periphery of rotor, each radial extension being parallel to any other of the radial extensions; and means attached to the inner surface of the inner housing being wedged in the structure of the inner housing.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |