US4138060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic draft control
Assignee: Individual
•
Filing: 1977-04-26
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Granted: 1979-02-06
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Expires: 1997-04-26
Abstract
Abstract A flue damper control includes a flue pipe, a damper in the flue pipe and an electro-mechanical control for opening and closing the damper according to thermostatically controlled conditions. The damper control is provided with an adjustment means to adjust the "full" open and "full" closed positions of the damper vane.
Inventors
- 👤 Alfonso Iacono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:07
CPC Classifications
F; F23; F23L; F23L11/00; F23L11/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A furnace flue gases control device for regulating the damper vane in a flue pipe comprising; a flue pipe section having a damper vane therein; a shaft for rotating said damper vane, said shaft extending at least through one side of said flue pipe section; a pinion gear affixed to the shaft end extending through said side of said flue pipe section; a toothed rack engaging said pinion for rotating said damper vane to an open position; a solenoid for reciprocating said toothed gear rack; a return spring for returning said damper vane to a closed position; a switch means for controlling a furnace burner circuit; and a lever on said pinion gear for switching said switch means, wherein said solenoid and said switch are adjustable to change the open and closed positions of said damper vane.
Claim 2
Dependent Claim
137 words
A furnace flue gases control device for regulating the damper vane in a flue pipe comprising; a flue pipe section having a damper vane therein; a shaft for rotating said damper vane, said shaft extending at least through one side of said flue pipe section; a pinion gear affixed to the shaft end extending through said side of said flue pipe section; a toothed rack engaging said pinion for rotating said damper vane to an open position; a solenoid for reciprocating said toothed gear rack; a return spring for returning said damper vane to a closed position; a switch means for controlling a furnace burner circuit; and a lever on said pinion gear for switching said switch means, wherein said solenoid and said switch are adjustable to change the open and closed positions of said damper vane.
Claim 3
Dependent Claim
22 words
A furnace flue gases control device as claimed in claim 1, wherein said solenoid and said switch mounted in slots for adjustment.
Claim 4
Dependent Claim
17 words
A furnace flue gas control device as claimed in claim 2, wherein said switch is a microswitch.
Claim 5
Dependent Claim
13 words
Preamble claim 3, wherein said damper control device is mounted in a housing.
Claim 6
Dependent Claim
12 words
Preamble claim 4, wherein said flue pipe section is lined with asbestos.
Claim 7
Dependent Claim
21 words
Preamble claim 5, wherein said solenoid is electrically connected to a thermostat for controlling the heating and cooling of a furnace.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |