US3260459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced air heating control systems
Assignee: Robertshaw Controls Co
•
Filing: 1963-01-29
•
Granted: 1966-07-12
•
Expires: 1983-01-29
Abstract
No abstract record available.
Inventors
- 👤 Michael J Caparone
- 👤 Marvin M Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:24
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A HEATING CONTROL SYSTEM, THE COMBINATION COMPRISING A BURNER FOR SUPPLYING HEATED AIR TO AN AREA, A DIFFERENTIAL PRESSRUE OPERATED DISPHRAGM VALVE FOR SUPPLYING FUEL AT A REGULATED PRESSRUE TO SAID BURNER, A BLEED FLOW OF FUEL FOR MAINTAINING AN OPERATING PRESSURE ON THE ONE SIDE OF SAID DIAPHRAGM VALVE, A PILOT PRESSURE REGULATOR FOR REGULATING SAID BLEED FLOW, AN ON-OFF VALVE MOVABLE BETWEEN ON AND OFF POSITIONS FOR CONTROLLING SAID BLEED FLOW, THERMOSTATIC MEANS OPERATIVELY CONNECTED TO SAID ON-OFF VALVE FOR ACTUATING THE SAME IN RESPONSE TO TEMPERATURE VARIATIONS IN THE AREA, THERMALLY RESPONSIVE MEANS REMOTELY DISPOSED FROM THE AREA OF MODULATING SAID PRESSRUE REGULATOR IN RESPONSE TO TEMPERATURE DIFFERENTIALS, FAN MEANS FOR CIRCULATING THE HEATED AIR,
Claim 2
Dependent Claim
119 words
IN A HEATING CONTROL SYSTEM, THE COMBINATION COMPRISING A BURNER FOR SUPPLYING HEATED AIR TO AN AREA, A DIFFERENTIAL PRESSRUE OPERATED DISPHRAGM VALVE FOR SUPPLYING FUEL AT A REGULATED PRESSRUE TO SAID BURNER, A BLEED FLOW OF FUEL FOR MAINTAINING AN OPERATING PRESSURE ON THE ONE SIDE OF SAID DIAPHRAGM VALVE, A PILOT PRESSURE REGULATOR FOR REGULATING SAID BLEED FLOW, AN ON-OFF VALVE MOVABLE BETWEEN ON AND OFF POSITIONS FOR CONTROLLING SAID BLEED FLOW, THERMOSTATIC MEANS OPERATIVELY CONNECTED TO SAID ON-OFF VALVE FOR ACTUATING THE SAME IN RESPONSE TO TEMPERATURE VARIATIONS IN THE AREA, THERMALLY RESPONSIVE MEANS REMOTELY DISPOSED FROM THE AREA OF MODULATING SAID PRESSRUE REGULATOR IN RESPONSE TO TEMPERATURE DIFFERENTIALS, FAN MEANS FOR CIRCULATING THE HEATED AIR,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |