US3728900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal nutation damper
Assignee: ORG EUROP DE RECH SPATIALES
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Filing: 1971-03-30
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Granted: 1973-04-24
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Expires: 1991-03-30
Abstract
Abstract A stabilization device to keep the nutation of a gyroscopic system, e.g., a spinning spacecraft or space vehicle, comprising an arcuate guide, a gas, liquid and/or solid component contained in said guide and adapted to move therein while dissipating energy, said movement being in a plane making an acute angle with the spin axis of said gyroscopic system.
Inventors
- 👤 U Engelking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:12
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/24; B64G1/28; B64G1/38; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1257
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
In combination with a gyroscopic system having a spin axis which provides the center of a tetrahedron formed by three reference planes having quadrants therebetween, a stabilization device for damping the nutation of said system comprising: an arcuate hollow tube associated with said system and located in a plane in one of said quadrants, said tube plane intersecting an adjacent reference plane at an acute angle of inclination; a material substance contained in said tube and movable therein when the system nutates about said spin axis; said acute angle of inclination being related to the ratio d/r by the equation: 5/7 (d/r - sin2 Beta ) (( Theta Z- Theta L)/ Theta L) 2 0 where Beta is the acute angle of inclination, Theta z is the spin moment of inertia, Theta L is the lateral moment of inertia, d is the distance between said tube and said spin axis, and r is the radius of curvature of the tube.
Claim 2
Dependent Claim
160 words
In combination with a gyroscopic system having a spin axis which provides the center of a tetrahedron formed by three reference planes having quadrants therebetween, a stabilization device for damping the nutation of said system comprising: an arcuate hollow tube associated with said system and located in a plane in one of said quadrants, said tube plane intersecting an adjacent reference plane at an acute angle of inclination; a material substance contained in said tube and movable therein when the system nutates about said spin axis; said acute angle of inclination being related to the ratio d/r by the equation: 5/7 (d/r - sin2 Beta ) (( Theta Z- Theta L)/ Theta L) 2 0 where Beta is the acute angle of inclination, Theta z is the spin moment of inertia, Theta L is the lateral moment of inertia, d is the distance between said tube and said spin axis, and r is the radius of curvature of the tube.
Claim 3
Dependent Claim
21 words
The combination system according to claim 1 in which said acute angle is approximately in the range of 0* to 45*.
Claim 4
Dependent Claim
16 words
The combination system according to claim 1 in which said material substance comprises a gas component.
Claim 5
Dependent Claim
16 words
The combination system according to claim 1 in which said material substance comprises a liquid component.
Claim 6
Dependent Claim
16 words
The combination system according to claim 1 in which said material substance comprises a solid component.
References Cited (Backward Citations)
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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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |