US3237459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damping device
Assignee: Northrop Grumman Corp
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Filing: 1961-10-02
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Granted: 1966-03-01
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 Borg Sune Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:58
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1257
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
IN APPARATUS FOR PROVIDING PREDETERMINED DAMPING OF AN INSTRUMENT CONTAINED IN A HOUSING, SAID INSTRUMENT HAVING AT LEAST A ROTATABLE COMPONENT IMMERSED IN A FLUID WHICH SUBSTANTIALLY FILLS SAID HOUSING, THE COMBINATION OF A GENERALLY ANNULAR PASSAGE FORMED WITHIN SAID HOUSING, A PLURALITY OF VANES ATTACHED TO SAID ROTATABLE COMPONENT, SAID VANES BEING DISPOSED IN SAID ANNULAR PASSAGE, A LIKE PLURALITY OF APERTURE MEMBERS DISPOSED IN SAID PASSAGE, EACH SAID APERTURE MEMBER BEING DISPOSED BETWEEN TWO OF SAID VANES, SAID APERTURE MEMBERS INCLUDING A FIXED ELEMENT HAVING AN APERTURE OF PREDETERMINED GEOMETRIC CONFIGURATION FORMED THERETHROUGH AND A MOVABLE ELEMENT ARRANGED ADJACENT SAID FIXED ELEMENT AND SLIDABLE RELATIVE THERETO TO MASK SAID APERTURE, A BELLOWS FORMING A PORTION OF SAID HOUSING AND HAVING AT LEAST A PORTION THEREOF MOVABLE IN RESPONSE TO VOLUMETRIC CHANGES IN SAID FLUID, MEANS CONNECTED TO SAID PORTION OF SAID BELLOWS AND EXTENDING TO SAID MOVABLE ELEMENTS OF SAID APERTURES, AND SPRING MEANS BIASING SAID MOVABLE ELEMENTS AGAINST SAID MEANS CONNECTED TO SAID PORTION OF SAID BELLOWS, WHEREBY SAID MOVABLE ELEMENTS MASK PORTIONS OF SAID APERTURES TO REDUCE THE EFFECTIVE AREA OF SAID PASSAGE AS A PREDETERMINED FUNCTION OF SAID VOLUMETRIC CHANGES IN SAID FLUID.
Claim 2
Dependent Claim
198 words
IN APPARATUS FOR PROVIDING PREDETERMINED DAMPING OF AN INSTRUMENT CONTAINED IN A HOUSING, SAID INSTRUMENT HAVING AT LEAST A ROTATABLE COMPONENT IMMERSED IN A FLUID WHICH SUBSTANTIALLY FILLS SAID HOUSING, THE COMBINATION OF A GENERALLY ANNULAR PASSAGE FORMED WITHIN SAID HOUSING, A PLURALITY OF VANES ATTACHED TO SAID ROTATABLE COMPONENT, SAID VANES BEING DISPOSED IN SAID ANNULAR PASSAGE, A LIKE PLURALITY OF APERTURE MEMBERS DISPOSED IN SAID PASSAGE, EACH SAID APERTURE MEMBER BEING DISPOSED BETWEEN TWO OF SAID VANES, SAID APERTURE MEMBERS INCLUDING A FIXED ELEMENT HAVING AN APERTURE OF PREDETERMINED GEOMETRIC CONFIGURATION FORMED THERETHROUGH AND A MOVABLE ELEMENT ARRANGED ADJACENT SAID FIXED ELEMENT AND SLIDABLE RELATIVE THERETO TO MASK SAID APERTURE, A BELLOWS FORMING A PORTION OF SAID HOUSING AND HAVING AT LEAST A PORTION THEREOF MOVABLE IN RESPONSE TO VOLUMETRIC CHANGES IN SAID FLUID, MEANS CONNECTED TO SAID PORTION OF SAID BELLOWS AND EXTENDING TO SAID MOVABLE ELEMENTS OF SAID APERTURES, AND SPRING MEANS BIASING SAID MOVABLE ELEMENTS AGAINST SAID MEANS CONNECTED TO SAID PORTION OF SAID BELLOWS, WHEREBY SAID MOVABLE ELEMENTS MASK PORTIONS OF SAID APERTURES TO REDUCE THE EFFECTIVE AREA OF SAID PASSAGE AS A PREDETERMINED FUNCTION OF SAID VOLUMETRIC CHANGES IN SAID FLUID.
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |