US3223325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Domestic heating system
Assignee: Individual
•
Filing: 1964-02-20
•
Granted: 1965-12-14
•
Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Letourneau Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:01
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/02; F24D5/04; F24D19/00; F24D19/10; F24D19/1084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A HEATING SYSTEM COMPRISING A FURNACE HAVING INPUT AND OUTPUT DUCTS ENABLING AIR INTERCHANGE BETWEEN SAID FURNACE AND AT LEAST A PAIR OF DISCRETE ZONES OF A DEWLLING; EACH SAID ZONE HAVING CORRESPONDING BAFFLES INTERPOSED BETWEEN ITSELF AND SAID FURNACE, BAFFLE OPERATING MEANS FOR SELECTIVELY ESTABLISHING OR PREVENTING SAID AIR INTERCHANGE BETWEEN ANY OF SAID ZONES AND SAID FURNACE, CONTROL MEANS FOR SAID BAFFLE OPERATING MEANS COMPRISING A THERMOPLASTIC SENSOR LOOP FOR EACH ZONE, A ZONE RELAY RESPONSIVE TO SAID SENSOR LOOP, MOTORING LOOP FOR EACH BAFFLE OPERATING MEANS TO DRIVE SAME IN RESPONSE TO ENERGIZATION OF THE RESPECTIVE ZONE-RELAY, A HOLDING LOOP FOR MAINTAINING SAID MOTORING LOOP AFTER DE-ENERGIZATION OF SAID ZONE-RELAY, AND DELAY MEANS TO BREAK SAID HOLDING LOOP AFTER SHUTDOWN OF SAID FURNACES, SAID MEANS RESPONSIVE TO COOLING OF SAID FURNACE.
Claim 2
Dependent Claim
134 words
A HEATING SYSTEM COMPRISING A FURNACE HAVING INPUT AND OUTPUT DUCTS ENABLING AIR INTERCHANGE BETWEEN SAID FURNACE AND AT LEAST A PAIR OF DISCRETE ZONES OF A DEWLLING; EACH SAID ZONE HAVING CORRESPONDING BAFFLES INTERPOSED BETWEEN ITSELF AND SAID FURNACE, BAFFLE OPERATING MEANS FOR SELECTIVELY ESTABLISHING OR PREVENTING SAID AIR INTERCHANGE BETWEEN ANY OF SAID ZONES AND SAID FURNACE, CONTROL MEANS FOR SAID BAFFLE OPERATING MEANS COMPRISING A THERMOPLASTIC SENSOR LOOP FOR EACH ZONE, A ZONE RELAY RESPONSIVE TO SAID SENSOR LOOP, MOTORING LOOP FOR EACH BAFFLE OPERATING MEANS TO DRIVE SAME IN RESPONSE TO ENERGIZATION OF THE RESPECTIVE ZONE-RELAY, A HOLDING LOOP FOR MAINTAINING SAID MOTORING LOOP AFTER DE-ENERGIZATION OF SAID ZONE-RELAY, AND DELAY MEANS TO BREAK SAID HOLDING LOOP AFTER SHUTDOWN OF SAID FURNACES, SAID MEANS RESPONSIVE TO COOLING OF SAID 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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |