US3095006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable flow restriction device
Assignee: Smith Development Co
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Filing: 1961-12-08
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Granted: 1963-06-25
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Expires: 1981-12-08
Abstract
No abstract record available.
Inventors
- 👤 Sydney S Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:14
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/08; F16K47/10; F16K47/04; F16K47/06; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5153; Y10T137/8593; Y10T137/87265; Y10T137/87378; Y10T137/87539
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A FLUID VARIABLE FLOW RESTRICTION DEVICE INCLUDING AN OUTER GENERALLY CYLINDRICAL BODY AND A GENERALLY CYLINDRICAL PLUG WITHIN THE BODY, SAID BODY HAVING AN INLET AND AN OUTLET AXIALLY SPACED THEREFROM, THE OUTER SURFACE OF THE PLUG AND THE INNER SURFACE OF THE BODY HAVING MATED SURFACES THAT DEFINE A PAIR OF PARALLEL GENERALLY HELICAL RESTRICTED ANNULAR FLOW PATHS, EACH GENERALLY UNIFORM IN CROSS SECTION, SAID FLOW PATHS BEING IN COMMUNICATION WITH SAID INLET AND BEING DIRECTED UNIFORMLY AND IN AN ANNULAR DIRECTION TOWARD THE OUTLET, MOVEMENT OF SAID PLUG RELATIVE TO SAID BODY BEING EFFECTIVE TO CHANGE THE CROSS SECTIONAL AREA OF SAID FLOW PATHS.
Claim 2
Dependent Claim
106 words
A FLUID VARIABLE FLOW RESTRICTION DEVICE INCLUDING AN OUTER GENERALLY CYLINDRICAL BODY AND A GENERALLY CYLINDRICAL PLUG WITHIN THE BODY, SAID BODY HAVING AN INLET AND AN OUTLET AXIALLY SPACED THEREFROM, THE OUTER SURFACE OF THE PLUG AND THE INNER SURFACE OF THE BODY HAVING MATED SURFACES THAT DEFINE A PAIR OF PARALLEL GENERALLY HELICAL RESTRICTED ANNULAR FLOW PATHS, EACH GENERALLY UNIFORM IN CROSS SECTION, SAID FLOW PATHS BEING IN COMMUNICATION WITH SAID INLET AND BEING DIRECTED UNIFORMLY AND IN AN ANNULAR DIRECTION TOWARD THE OUTLET, MOVEMENT OF SAID PLUG RELATIVE TO SAID BODY BEING EFFECTIVE TO CHANGE THE CROSS SECTIONAL AREA OF SAID FLOW PATHS.
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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |