US4748829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined heating and cooling apparatus
Assignee: Individual
•
Filing: 1986-12-31
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Granted: 1988-06-07
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Expires: 2006-12-31
Abstract
Abstract A combined heating and air conditioning unit has a condenser for cooling compressed working fluid and an evaporator for expanding the working fluid and to cool it. A centrifugal blower pulls air through the condenser into one side of the blower and pulls cool air through the evaporator into the other side of the blower. A divider in the center of the blower prevents the cool air from the evaporator and warm air from the condenser from mixing. At the output of the blower, a valve is provided at the output and connected to the delivery duct so that warm air from one side of the blower or cold air from the other is delivered to the duct, and the air not delivered to the duct is exhausted to the atmosphere. The valve may also allow some mixing of the warm and cold air.
Inventors
- 👤 Gary D. Whiteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:53
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/022; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87249
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
215 words
In a unit for alternatively space heating or cooling, which includes a compressor for compressing a working fluid, a condenser for expelling heat from the compressed working fluid, an evaporator for expanding working fluid to cool the working fluid interconnected to each other, blower means adjacent the condenser and the evaporator for drawing ambient air through the condenser and the evaporator into the blower means; divider means in the blower means for blocking mixing of the air from the condenser and from the evaporator in the blower means and maintaining air in first and second air flows; valve means in the path of the first and second air flows for directing at least a first portion of the first air flow to an outlet and exhausting at least a first portion of the second air flow or exhausting at least a first portion of the first air flow and directing at least a first portion of the second air flow to an outlet, the improvement comprising: the provision of the valve means having a center wall aligned with the dividing means and two side walls on each side of the center wall; and a pair of valve plates, one on each side of the center wall, each pivoting between a sidewall and the center plate.
Claim 2
Dependent Claim
215 words
In a unit for alternatively space heating or cooling, which includes a compressor for compressing a working fluid, a condenser for expelling heat from the compressed working fluid, an evaporator for expanding working fluid to cool the working fluid interconnected to each other, blower means adjacent the condenser and the evaporator for drawing ambient air through the condenser and the evaporator into the blower means; divider means in the blower means for blocking mixing of the air from the condenser and from the evaporator in the blower means and maintaining air in first and second air flows; valve means in the path of the first and second air flows for directing at least a first portion of the first air flow to an outlet and exhausting at least a first portion of the second air flow or exhausting at least a first portion of the first air flow and directing at least a first portion of the second air flow to an outlet, the improvement comprising: the provision of the valve means having a center wall aligned with the dividing means and two side walls on each side of the center wall; and a pair of valve plates, one on each side of the center wall, each pivoting between a sidewall and the center plate.
Claim 3
Dependent Claim
39 words
In the unit of claim 1, the improvement further comprising the provision of connecting means connecting the valve plates together and motive means attached to the connecting means for moving the connecting means and pivoting the valve plate simultaneously.
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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |