US3843075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll rate control system
Assignee: United States Atomic Energy Commission
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Filing: 1973-06-11
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Granted: 1974-10-22
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Expires: 1993-06-11
Abstract
Abstract A control system which adjusts the angle of fins on an aerodynamic body proportional to fluid displaced by sensing masses subjected to centrifugal forces generated by the spin of the body. The displaced fluid controls the rotation of one or more fins and is interconnected between sensing masses to provide for synchronized and uniform movement within the system.
Inventors
- 👤 T Weber
- 👤 C Yokomizo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:59
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/60; F42B10/62; F42B10/64; F42B10/02; F42B10/26; F42B10/28; F42B10/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
299 words
A roll control system for an aerodynamics body having control fins extending therefrom comprising first and second rotatable means carried by said body at opposite ends of a diameter for rotatably supporting respectivE first and second of said fins for changing their orientation with respect to said body; actuator means for each of said fin supporting means, each actuator means including a housing having two chambers together with fluid responsive means for increasing the size of one of said chambers simultaneously with decreasing the size of the other chamber together with a mechanical means interconnecting said fluid responsive means and said fins for rotating said fins with said chamber size variation; fluid displacing means including first and second housings carried by said body, with each housing having a sensing mass dividing said housings into inward and outward portions and movable generally radially thereof in opposite directions inwardly and outwardly along a radius of said body in response to centrifugal force acting on said body for displacing fluid proportional to said centrifugal force from said inward and outward portions of said housings, and means for biasing said sensing masses to initial positions within said housings; coupling means including conduits for hydraulically interconnecting the outward portions of each of said fluid displacing means housings to a chamber of a separate one of the actuator means housing and the inward portion of each of said fluid displacing means housings to the other chambers of the opposite actuator housing means to provide an essentially constant-volume in each interconnected actuator means housing chamber, fluid displacing means housing portion, and conduit during sensing mass movement for rotating said first and second fins proportional to said fluid displacement and said centrifugal force; and an essentially noncompressible fluid filling each of said chambers, housing portions and conduits.
Claim 2
Dependent Claim
299 words
A roll control system for an aerodynamics body having control fins extending therefrom comprising first and second rotatable means carried by said body at opposite ends of a diameter for rotatably supporting respectivE first and second of said fins for changing their orientation with respect to said body; actuator means for each of said fin supporting means, each actuator means including a housing having two chambers together with fluid responsive means for increasing the size of one of said chambers simultaneously with decreasing the size of the other chamber together with a mechanical means interconnecting said fluid responsive means and said fins for rotating said fins with said chamber size variation; fluid displacing means including first and second housings carried by said body, with each housing having a sensing mass dividing said housings into inward and outward portions and movable generally radially thereof in opposite directions inwardly and outwardly along a radius of said body in response to centrifugal force acting on said body for displacing fluid proportional to said centrifugal force from said inward and outward portions of said housings, and means for biasing said sensing masses to initial positions within said housings; coupling means including conduits for hydraulically interconnecting the outward portions of each of said fluid displacing means housings to a chamber of a separate one of the actuator means housing and the inward portion of each of said fluid displacing means housings to the other chambers of the opposite actuator housing means to provide an essentially constant-volume in each interconnected actuator means housing chamber, fluid displacing means housing portion, and conduit during sensing mass movement for rotating said first and second fins proportional to said fluid displacement and said centrifugal force; and an essentially noncompressible fluid filling each of said chambers, housing portions and conduits.
Claim 3
Dependent Claim
59 words
The control system of claim 1 wherein said sensing mass movement and fluid displacement in one of said fluid displacing means housing portions causes the chamber of one of said actuators coupled therewith to expand while the other chamber of said one actuator is simultaneously decreasing and displacing fluid to a portion of the other fluid displacing means housing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |