US3785433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system including indoor fan speed control
Assignee: Trane US Inc
•
Filing: 1972-05-30
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Granted: 1974-01-15
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Expires: 1992-05-30
Abstract
Abstract An air conditioning system comprising both heating and cooling means and a motor-driven air circulating means includes control means responsive to the temperature of the air flowing from the cooling means for increasing the motor speed during operation of the cooling means.
Inventors
- 👤 J Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/02; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F25C; F25C5/00; F25C5/20; F25C5/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
In an air conditioning system comprising air cooling means, air heating means, and air circulating means including a multiple-speed drive motor for circulating a stream of air in heat transfer relationship with said cooling and heating means; control means including: switch means for selectively operating said heating or cooling means; and a motor energizing circuit including a drive motor switch for energizing said drive motor during operation of either said heat means or said cooling means; said motor energizing circuit including temperature responsive switch means in series with said drive motor switch and in the path of the airstream flowing from said cooling means for operating said motor at a higher speed only when the temperature of the air sensed thereby indicates operation of said cooling means.
Claim 2
Dependent Claim
127 words
In an air conditioning system comprising air cooling means, air heating means, and air circulating means including a multiple-speed drive motor for circulating a stream of air in heat transfer relationship with said cooling and heating means; control means including: switch means for selectively operating said heating or cooling means; and a motor energizing circuit including a drive motor switch for energizing said drive motor during operation of either said heat means or said cooling means; said motor energizing circuit including temperature responsive switch means in series with said drive motor switch and in the path of the airstream flowing from said cooling means for operating said motor at a higher speed only when the temperature of the air sensed thereby indicates operation of said cooling means.
Claim 3
Dependent Claim
22 words
An air conditioning system according to claim 1 in which said temperature responsive switch means is between said cooling and heating means.
Claim 4
Dependent Claim
161 words
In an air conditioning system comprising air cooling means, air heating means, and air circulating means including a multiple-speed drive motor for circulating a stream of enclosure air to be conditioned in heat transfer relationship first with said cooling means and thereafter with heating means; control means including: a thermostat including switch means for selectively operating said heating or cooling means and for controlling the operation of said heating and cooling means in response to enclosure temperature; a motor energizing circuit including a drive motor switch for energizing said drive motor during operation of either said heat means or said cooling means; and said motor energizing circuit including temperature responsive switch means in series with said drive motor switch and in the path of the airstream flowing from said cooling means for initially operating said motor at a low speed and for increasing the motor speed only when the temperature of the air sensed thereby indicates operation of said cooling means.
Claim 5
Dependent Claim
161 words
In an air conditioning system comprising air cooling means, air heating means, and air circulating means including a multiple-speed drive motor for circulating a stream of enclosure air to be conditioned in heat transfer relationship first with said cooling means and thereafter with heating means; control means including: a thermostat including switch means for selectively operating said heating or cooling means and for controlling the operation of said heating and cooling means in response to enclosure temperature; a motor energizing circuit including a drive motor switch for energizing said drive motor during operation of either said heat means or said cooling means; and said motor energizing circuit including temperature responsive switch means in series with said drive motor switch and in the path of the airstream flowing from said cooling means for initially operating said motor at a low speed and for increasing the motor speed only when the temperature of the air sensed thereby indicates operation of said cooling means.
Claim 6
Dependent Claim
22 words
An air conditioning system according to claim 3 wherein said temperature responsive switch means is positioned between said cooling and heating means.
References Cited (Backward Citations)
US3367408A
Cited
US3454078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |