Patent US3823574A successfully refreshed from Google Patents.
US3823574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for opening exhaust and vent ports of an air conditioning unit
Assignee: Carrier Corp
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Filing: 1973-05-02
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Granted: 1974-07-16
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Expires: 1993-05-02
Abstract
Abstract Apparatus for selectively opening the exhaust and vent ports in a wall between the condenser and evaporator sections of an air conditioning unit, the apparatus comprising hinged doors biased to port closing positions and an operating lever having an actuating arm extending from a rotatable shaft for selectively exerting torque on tabs extending from the doors to open the selected one of the doors.
Inventors
- 👤 T Bolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:15
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/022; F24F1/027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
242 words
In an air conditioning unit having a casing, a partition dividing the unit into an evaporator section and a condenser section, an evaporator fan in the evaporator section of the unit and a condenser fan in the condenser section of the unit, the fans being disposed to create high and low pressure regions on the evaporator side of the partition, apparatus for selectively venting outdoor air to a space being conditioned or for exhausting from the space, said apparatus comprising: means defining an exhaust port in a region of the partition where the pressure on the evaporator side is higher than the pressure on the condenser side; an exhaust door for opening and closing said exhaust port; means for mounting said exhaust door for pivotal movement between exhaust port opening and closing positions; means defining a vent port in a region of the partition where the pressure on the evaporator side is lower than the region on the condenser side; a vent door for opening and closing said vent port; means for mounting said vent door for pivotal movement between vent port opening and closing positions; and lever means for operating said exhaust and vent doors, said lever means including actuating means extending from a rotatable shaft for selectively engaging one of said exhaust and vent doors to apply torque thereto to effect the pivotal movement of said one door, and control means extending transversely from said shaft for rotating the shaft.
Claim 2
Dependent Claim
242 words
In an air conditioning unit having a casing, a partition dividing the unit into an evaporator section and a condenser section, an evaporator fan in the evaporator section of the unit and a condenser fan in the condenser section of the unit, the fans being disposed to create high and low pressure regions on the evaporator side of the partition, apparatus for selectively venting outdoor air to a space being conditioned or for exhausting from the space, said apparatus comprising: means defining an exhaust port in a region of the partition where the pressure on the evaporator side is higher than the pressure on the condenser side; an exhaust door for opening and closing said exhaust port; means for mounting said exhaust door for pivotal movement between exhaust port opening and closing positions; means defining a vent port in a region of the partition where the pressure on the evaporator side is lower than the region on the condenser side; a vent door for opening and closing said vent port; means for mounting said vent door for pivotal movement between vent port opening and closing positions; and lever means for operating said exhaust and vent doors, said lever means including actuating means extending from a rotatable shaft for selectively engaging one of said exhaust and vent doors to apply torque thereto to effect the pivotal movement of said one door, and control means extending transversely from said shaft for rotating the shaft.
Claim 3
Dependent Claim
71 words
Apparatus according to claim 1 wherein the mounting means associated with each of said discharge and vent doors is located adjacent the respective discharge and vent ports, and said doors each include a port closing portion in the plane of the axis of pivotal movement of the door for covering the respective port and a second portion being engageable by said actuating means To effect the pivotal movement of the door.
Claim 4
Dependent Claim
50 words
Apparatus according to claim 1 and further including spring means for biasing said vent and exhaust doors to their respective port closing positions, wherein said lever means selectively applies torque to one of said vent and exhaust doors to open said one door against the force of said spring means.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 3 wherein the spring means for biasing said vent and exhaust doors each comprise a tension spring connected at one end to the respective exhaust and vent door and at the opposite end to said partition.
Claim 6
Dependent Claim
132 words
Apparatus according to claim 1 and further comprising: means for biasing said exhaust door to either the exhaust port opening position or the exhaust port closing position; and means for biasing said vent door to the same of the port opening or closing positions as said exhaust door biasing means biases said exhaust door; wherein said exhaust door mounting means and said vent door mounting means mount said doors for pivotal movement about parallel axes; and wherein said rotatable shaft has a longitudinal axis of rotation parallel to the axes of pivotal movement of said doors, and said control means has a manually accessible portion, movement of said control means rotating said shaft to apply torque to a selected one of said doors against the biasing means associated with said one door.
Claim 7
Dependent Claim
110 words
Apparatus according to claim 1 and further including means for biasing at least one of said exhaust and vent doors to its respective port opening or port closing position; wherein: said one door includes a port closing portion and a tab extending from said port closing portion, said tab including a first section engageable by said actuating means for effecting movement of said one door against the biasing means associated with said one door, and a second section transverse to said first section, said second section being engageable by said actuating means for maintaining said one door in the position to which said actuating means has moved said one door.
Claim 8
Dependent Claim
106 words
Apparatus according to claim 1 and further including means for biasing each of said exhaust and vent doors to one of their port opening or port closing positions; wherein: each of said doors includes a port closing portion and a tab extending from said port closing portion, said tab having a first section engageable by said actuating means for effecting movement of said door against the biasing means associated with said door, and a second section transverse to said first section, said second section being engageable by said actuating means for maintaining said door in the position to which said actuating means has moved said door.
Claim 9
Dependent Claim
44 words
Apparatus according to claim 7 wherein the first sections of said tabs are located in a generally opposed relationship, and said actuating means comprises an arm disposed between said tabs for alternatively exerting torque on said tabs to selectively move one of said doors.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |