Patent US3133529A successfully refreshed from Google Patents.
US3133529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of benson boilers and similar high pressure boilers
Assignee: Duerrwerke AG
•
Filing: 1961-03-29
•
Granted: 1964-05-19
•
Expires: 1981-03-29
Abstract
No abstract record available.
Inventors
- 👤 Wessely Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:52
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
APPARATUS FOR REGULATING THE HEAT INPUT TO A FLUID HEATING AND SUPERHEATING UNIT OF THE ONCE-THROUGH TYPE WHICH COMPRISES MEANS FOR PASSING A CONTROLLED VARIABLE FLOW OF FLUID THROUGH SAID UNIT, MEANS FOR MEASURING THE TEMPERATURE DIFFERENTIAL IN THE FLUID FLOW PATH OF A BYPASS SECTION POSITIONED IN PARALLEL TO THE FLUID HEATING PORTION OF SAID UNIT, MEANS FOR MAINTAINING A SUBSTANTIALLY CONSTANT FLUID FLOW THROUGH SAID BYPASS SECTION OF THE FLUID HEATING PORTION OF SAID UNIT, MEANS FOR MEASURING THE FLOW RATE AND PRESSURE OF THE FLUID HEATED IN SAID UNIT, AND CONTROL MEANS FOR REGULATING THE RATE OF FUEL DELIVERY TO SAID UNIT RESPONSIVE TO THE FLOW RATE AND PRESSURE OF SAID FLUID AS MODIFIED BY SAID MEASUREMENT OF FLUID HEATING TEMPERATURE DIFFERENTIAL.
Claim 2
Dependent Claim
125 words
APPARATUS FOR REGULATING THE HEAT INPUT TO A FLUID HEATING AND SUPERHEATING UNIT OF THE ONCE-THROUGH TYPE WHICH COMPRISES MEANS FOR PASSING A CONTROLLED VARIABLE FLOW OF FLUID THROUGH SAID UNIT, MEANS FOR MEASURING THE TEMPERATURE DIFFERENTIAL IN THE FLUID FLOW PATH OF A BYPASS SECTION POSITIONED IN PARALLEL TO THE FLUID HEATING PORTION OF SAID UNIT, MEANS FOR MAINTAINING A SUBSTANTIALLY CONSTANT FLUID FLOW THROUGH SAID BYPASS SECTION OF THE FLUID HEATING PORTION OF SAID UNIT, MEANS FOR MEASURING THE FLOW RATE AND PRESSURE OF THE FLUID HEATED IN SAID UNIT, AND CONTROL MEANS FOR REGULATING THE RATE OF FUEL DELIVERY TO SAID UNIT RESPONSIVE TO THE FLOW RATE AND PRESSURE OF SAID FLUID AS MODIFIED BY SAID MEASUREMENT OF FLUID HEATING TEMPERATURE DIFFERENTIAL.
References Cited (Backward Citations)
US2907305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |