US4046318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic boiler damper
Assignee: Individual
•
Filing: 1976-02-18
•
Granted: 1977-09-06
•
Expires: 1996-02-18
Abstract
Abstract An automatic boiler damper comprising a solenoid valve secured to the pivot axis of a damper included within a stack utilized to vent a heating system. The solenoid is electrically operated upon the closing of a thermostat secured to the stack at a point immediately over the damper location. The damper is provided with a vent hole which enables the thermostat to detect the presence of heated stack gases in sufficient quantity and temperature flowing upwardly from the damper in the closed position, so as to enable the solenoid to open the damper and vent the stack gases through the stack. Heat is conserved thereby and cold drafts are not permitted to enter the stack as a downdraft.
Inventors
- 👤 Mervyn Ripley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:45
CPC Classifications
F; F23; F23N; F23N3/00; F23N3/04; F23N3/045; F23L; F23L11/00; F23L11/005; F23L13/00; F23L13/02; F24; F24H; F24H15/00; F24H15/20; F24H15/235; F24H15/30; F24H15/33; F24H9/00; F24H9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
The combination of a heating system, a stack venting said heating system, a vane-type damper pivotably secured to said stack about an axle passing through the surfaces of said stack, the improvement comprising an automatic boiler damper having an electrically operated solenoid coil adapted to manipulate said vane into an open position, venting means adapted to permit a small amount of stack gases to emerge through said vane when said vane is in a closed position, temperature sensing means, said temperature sensing means including a temperature sensing element adapted to sense the temperature of said small amount of stack gases, said temperature sensing means adapted to supply energizing power to said solenoid coil upon reaching a pre-determined temperature level thereabout, said temperature sensing means including a pair of normally open contacts, said pair of normally open contacts being disposed in electrical touching engagement to each other when the temperature of said temperature sensing element reaches a preset temperature level, said pair of normally open contacts in a series electrical circuit with said solenoid coil, said series electrical circuit provided with operating power derived from said heating system when said heating system is electrically operated to produce heat.
Claim 2
Dependent Claim
197 words
The combination of a heating system, a stack venting said heating system, a vane-type damper pivotably secured to said stack about an axle passing through the surfaces of said stack, the improvement comprising an automatic boiler damper having an electrically operated solenoid coil adapted to manipulate said vane into an open position, venting means adapted to permit a small amount of stack gases to emerge through said vane when said vane is in a closed position, temperature sensing means, said temperature sensing means including a temperature sensing element adapted to sense the temperature of said small amount of stack gases, said temperature sensing means adapted to supply energizing power to said solenoid coil upon reaching a pre-determined temperature level thereabout, said temperature sensing means including a pair of normally open contacts, said pair of normally open contacts being disposed in electrical touching engagement to each other when the temperature of said temperature sensing element reaches a preset temperature level, said pair of normally open contacts in a series electrical circuit with said solenoid coil, said series electrical circuit provided with operating power derived from said heating system when said heating system is electrically operated to produce heat.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |