US3552444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable throttle valve for logic applications
Assignee: Brown and Sharpe Manufacturing Co
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Filing: 1969-04-21
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Granted: 1971-01-05
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Expires: 1989-04-21
Abstract
Abstract The disclosure of the invention is a variable throttle valve which consists of two cooperating valve elements having oppositely disposed relatively diverging surfaces, at least one of which is an elastomer, one of said surfaces having a spiral capillary restrictor groove, and means for relatively moving said surfaces toward and away from one another to control the effective length of said spiral capillary restrictor groove.
Inventors
- 👤 George Napoleon Levesque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:27
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F16L55/027; F15; F15C; F15C1/00; F15C1/02; F16K; F16K47/00; F16K47/04; F16K47/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A variable throttle valve having, in combination, two cooperating valve elements having oppositely disposed diverging surfaces, at least one of said elements being an elastomer, and a spiral capillary restrictor groove formed in one of said diverging surfaces having an effective length determined by the length of closure of said groove by the diverging surface of the other said valve element, and adjusting means for relatively moving said valve elements including said diverging surfaces toward and away from each other to vary the effective length of said spiral capillary restrictor groove.
Claim 2
Dependent Claim
91 words
A variable throttle valve having, in combination, two cooperating valve elements having oppositely disposed diverging surfaces, at least one of said elements being an elastomer, and a spiral capillary restrictor groove formed in one of said diverging surfaces having an effective length determined by the length of closure of said groove by the diverging surface of the other said valve element, and adjusting means for relatively moving said valve elements including said diverging surfaces toward and away from each other to vary the effective length of said spiral capillary restrictor groove.
Claim 3
Dependent Claim
56 words
A variable throttle valve according to claim 1, in which one of said cooperating relatively adjustable valve elements is formed of a hard nonyielding material, the other of said cooperating relatively adjustable valve elements is an elastomer, and a restrictor groove is formed in the engaging surface of one of said cooperating relatively adjustable valve elements.
Claim 4
Dependent Claim
31 words
A variable throttle valve according to claim 2, in which the restrictor groove is formed in the engaging surface of that valve element which is formed of a hard nonyielding material.
Claim 5
Dependent Claim
18 words
A variable throttle valve according to claim 2, in which the restrictor groove is formed in the elastomer.
Claim 6
Dependent Claim
34 words
A variable throttle valve according to claim 1, in which both of said cooperating relatively adjustable valve elements are elastomers, the restrictor groove being formed in the diverging surface of one of said elastomers.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |