US3447775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm valve control
Assignee: Robertshaw Controls Co
•
Filing: 1965-03-25
•
Granted: 1969-06-03
•
Expires: 1985-03-25
Abstract
No abstract record available.
Inventors
- 👤 Jay R Katchka
- 👤 Theodore J Dykzeul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:55
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0638; G05D16/0641; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/38; F16K31/385; F23; F23N; F23N1/00; F23N1/007; G05D16/14; G05D16/16; G05D16/163; F23N2225/00; F23N2225/08; F23N2235/00; F23N2235/12; F23N2235/18; F23N2235/20; F23N2235/24; F23N5/00; F23N5/02; F23N5/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A CONTROL SYSTEM FOR SUPPLYING A FUEL FLOW TO BURNER APPARATUS, THE COMBINATION COMPRISING A CASING HAVING INLET AND OUTLET MEANS, A DIAPHRAGM VALVE OPERATIVELY DISPOSED BETWEEN SAID INLET AND OUTLET MEANS AND DEFINING A PRESSURE OPERATING CHAMBER IN SAID CASING, BLEED LINE MEANS FOR EFFECTING OPERATION OF SAID DIAPHRAGM VALVE, SAID BLEED LINE MEANS INCLUDING AN INLET BLEED PASSAGE COMMUNICATING WITH SAID INLET MEANS, A FIRST BLEED PASSAGE BETWEEN SAID INLET BLEED PASSAGE AND THE PRESSURE OPERATING CHAMBER AND A SECOND BLEED PASSAGE BETWEEN SAID INLET BLEED PASSAGE AND SAID OUTLET MEANS, VALVE MEANS IN SAID BLEED LINE MEANS CONTROLLING A BLEED FLOW THERETHROUGH, AND FLOATING VARIABLE ORIFICE MEANS OPERATIVELY DISPOSED IN THE INLET BLEED PASSAGE OF SAID BLEED LINE MEANS UPSTREAM OF SAID VALVE MEANS THREIN TO VARY A BLEED FLOW THERETHROUGH AND EFFECT OPERATION OF SAID DIAPHRAGM VALVE, SAID FLOATING VARIABLE ORIFICE MEANS BEING OPERATED IN RESPONSE TO PRESSURE DIFFERENTIALS OF THE BLEED FLOW.
Claim 2
Dependent Claim
158 words
IN A CONTROL SYSTEM FOR SUPPLYING A FUEL FLOW TO BURNER APPARATUS, THE COMBINATION COMPRISING A CASING HAVING INLET AND OUTLET MEANS, A DIAPHRAGM VALVE OPERATIVELY DISPOSED BETWEEN SAID INLET AND OUTLET MEANS AND DEFINING A PRESSURE OPERATING CHAMBER IN SAID CASING, BLEED LINE MEANS FOR EFFECTING OPERATION OF SAID DIAPHRAGM VALVE, SAID BLEED LINE MEANS INCLUDING AN INLET BLEED PASSAGE COMMUNICATING WITH SAID INLET MEANS, A FIRST BLEED PASSAGE BETWEEN SAID INLET BLEED PASSAGE AND THE PRESSURE OPERATING CHAMBER AND A SECOND BLEED PASSAGE BETWEEN SAID INLET BLEED PASSAGE AND SAID OUTLET MEANS, VALVE MEANS IN SAID BLEED LINE MEANS CONTROLLING A BLEED FLOW THERETHROUGH, AND FLOATING VARIABLE ORIFICE MEANS OPERATIVELY DISPOSED IN THE INLET BLEED PASSAGE OF SAID BLEED LINE MEANS UPSTREAM OF SAID VALVE MEANS THREIN TO VARY A BLEED FLOW THERETHROUGH AND EFFECT OPERATION OF SAID DIAPHRAGM VALVE, SAID FLOATING VARIABLE ORIFICE MEANS BEING OPERATED IN RESPONSE TO PRESSURE DIFFERENTIALS OF THE BLEED FLOW.
References Cited (Backward Citations)
US414493A
Cited
US1144657A
Cited
US1878001A
Cited
US2387225A
Cited
US2491521A
Cited
US2991796A
Cited
US2936997A
Cited
US3145056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |