Patent US4011903A successfully refreshed from Google Patents.
US4011903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper for heating/cooling system
Assignee: Lear Siegler Inc
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Filing: 1975-03-24
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Granted: 1977-03-15
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Expires: 1995-03-24
Abstract
Abstract A sliding damper plate is positioned between the blower and heat exchanger of a down draft gun-type furance for mobile home usage and includes cam means at opposite ends thereof for actuating associated switches coupled to the furnace and air conditioning control circuits. When the damper is closed to cut off the flow path through the furnace to permit a separate air conditioner unit to utilize the existing heating ductwork in a mobile home, one of the switches is actuated to permit operation of the air conditioning unit. Alternatively, when the damper is moved to an open position for heating operation, the air conditioning unit is inactivated and a second switch closed by the cam to permit furnace operation. If the damper is partially open or closed, both the furnace and air conditioning unit are deactivated.
Inventors
- 👤 Frank Harbin
- 👤 Harry W. Slater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:26
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00357; B60H1/00364; B60H1/00642; B60H1/00664; B60H1/00692; B60H1/22; B60H1/2203; B60H1/2212; F; F24; F24F; F24F11/00; F24F11/30; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
168 words
A damper and control for permitting use of common ducts in a heating/cooling system in which separate air forcing means are provided for a furnace associated therewith and an air conditioning unit associated therewith, said damper and control comprising: a stationary plate mounted to the furnace in the air flow path and including a relatively large aperture extending through said plate; a sliding plate movable between a first position which restricts the aperture of said stationary plate and a second position wherein said aperture is unrestricted; camming means comprising an elongated cam plate with a pair of spaced flanges extending outwardly therefrom, said cam plate coupled to said sliding plate approximately parallel to the direction of motion of said sliding plate; and electrical switch means comprising first and second electrical switches positioned to be alternately actuated by one of said flanges of said cam plate for providing a signal usable by a furnace control circuit to deactivate the furnace when said apertures are restricted by said sliding plate.
Claim 2
Dependent Claim
168 words
A damper and control for permitting use of common ducts in a heating/cooling system in which separate air forcing means are provided for a furnace associated therewith and an air conditioning unit associated therewith, said damper and control comprising: a stationary plate mounted to the furnace in the air flow path and including a relatively large aperture extending through said plate; a sliding plate movable between a first position which restricts the aperture of said stationary plate and a second position wherein said aperture is unrestricted; camming means comprising an elongated cam plate with a pair of spaced flanges extending outwardly therefrom, said cam plate coupled to said sliding plate approximately parallel to the direction of motion of said sliding plate; and electrical switch means comprising first and second electrical switches positioned to be alternately actuated by one of said flanges of said cam plate for providing a signal usable by a furnace control circuit to deactivate the furnace when said apertures are restricted by said sliding plate.
Claim 3
Dependent Claim
166 words
A damper and control for permitting use of common ducts in a heating/cooling system in which separate air forcing means are provided for a furnace associated therewith and an air conditioning unit associated therewith, said damper and control comprising: a pair of spaced, stationary plates mounted to each other and including relatively large aligned apertures extending through both plates; a sliding plate movable between a first position which restricts the apertures of said stationary plates and a second position wherein said apertures are unrestricted; camming means comprising an elongated cam plate with a pair of spaced flanges extending outwardly therefrom, said cam plate coupled to said sliding plate approximately parallel to the direction of motion of said sliding plate; and electrical switch means comprising first and second electrical switches positioned to be alternately actuated by one of said flanges of said cam plate for providing a signal usable by a furnace control circuit to deactivate the furnace when said apertures are restricted by said sliding plate.
Claim 4
Dependent Claim
166 words
A damper and control for permitting use of common ducts in a heating/cooling system in which separate air forcing means are provided for a furnace associated therewith and an air conditioning unit associated therewith, said damper and control comprising: a pair of spaced, stationary plates mounted to each other and including relatively large aligned apertures extending through both plates; a sliding plate movable between a first position which restricts the apertures of said stationary plates and a second position wherein said apertures are unrestricted; camming means comprising an elongated cam plate with a pair of spaced flanges extending outwardly therefrom, said cam plate coupled to said sliding plate approximately parallel to the direction of motion of said sliding plate; and electrical switch means comprising first and second electrical switches positioned to be alternately actuated by one of said flanges of said cam plate for providing a signal usable by a furnace control circuit to deactivate the furnace when said apertures are restricted by said sliding plate.
Claim 5
Dependent Claim
52 words
The system as defined in claim 2 and further including a housing positioned adjacent said cam plate and wherein said switches are mounted in said housing, said housing further including guide means extending therefrom to engage an edge of said cam plate for guidably supporting said cam plate as it is moved.
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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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |