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US3662818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor transfer
Assignee: Motors Liquidation Co
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Filing: 1970-05-11
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Granted: 1972-05-16
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Expires: 1990-05-11
Abstract
Abstract In preferred form, an automobile heating and air conditioning system having a plenum chamber containing a heater core and an evaporator core, and a closable purge outlet opening into the passenger compartment. When the heating and air conditioning system is inoperative, the purge outlet allows air to flow through the plenum chamber and into the passenger compartment to prevent the formation of odor and humidity in the chamber. When the system is operative to heat, cool or ventilate the automobile interior, the purge outlet is blocked by a pivotal door which also directs air through a heater outlet for distribution into the passenger compartment.
Inventors
- 👤 John Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:49
CPC Classifications
B; B60; B60H; B60H3/00; B60H3/0085
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
A heating and air conditioning system for an automobile passenger compartment comprising: hollow duct means forming an elongated plenum chamber for passing air therethrough; a warmed heater core within said plenum chamber for heating air flowing through said plenum chamber; a cooled evaporator core within said plenum chamber for cooling and dehumidifying air flowing through said plenum chamber; an inlet opening in said duct means for admitting air from said passenger compartment into one end of said elongated plenum chamber; outlet opening means in said duct for discharging air from the other end of said elongated plenum chamber into said passenger compartment; a blower within said plenum chamber for drawing air through said inlet from said passenger compartment and discharging the air through said outlet means back into said passenger compartment; an electric motor powered by a battery for rotating said blower; and means including the automobile ignition switch for energizing said blower motor for producing a continuous relatively low volume of airflow through said plenum independently of the heating and air conditioning controls.
Claim 2
Dependent Claim
174 words
A heating and air conditioning system for an automobile passenger compartment comprising: hollow duct means forming an elongated plenum chamber for passing air therethrough; a warmed heater core within said plenum chamber for heating air flowing through said plenum chamber; a cooled evaporator core within said plenum chamber for cooling and dehumidifying air flowing through said plenum chamber; an inlet opening in said duct means for admitting air from said passenger compartment into one end of said elongated plenum chamber; outlet opening means in said duct for discharging air from the other end of said elongated plenum chamber into said passenger compartment; a blower within said plenum chamber for drawing air through said inlet from said passenger compartment and discharging the air through said outlet means back into said passenger compartment; an electric motor powered by a battery for rotating said blower; and means including the automobile ignition switch for energizing said blower motor for producing a continuous relatively low volume of airflow through said plenum independently of the heating and air conditioning controls.
Claim 3
Dependent Claim
198 words
A heating and air conditioning system for an automobile passenger compartment comprising: hollow duct means forming an elongated plenum chamber for passing air therethrough; a warmed heater core within said plenum chamber for heating air flowing through said plenum chamber; a cooled evaporator core within said plenum chamber for cooling and dehumidifying air flowing through said plenum chamber; an inlet in said duct means for admitting air into one end of said elongated plenum chamber; a purge outlet in said duct means for discharging air from the other end of said elongated plenum chamber into the passenger compartment; another outlet in said duct means for discharging air from said other end of said elongated plenum chamber into the passenger compartment; control means for blocking said last mentioned outlet and unblocking said purge outlet when the heating and air conditioning system is inactive and for unblocking said last mentioned outlet and blocking said purge outlet when the system is active; an electric motor powered fan energized through the automobile ignition switch to cause a continuous air flow into said inlet means, through said plenum chamber and alternatively out said purge outlet and said other outlet into the passenger compartment.
Claim 4
Dependent Claim
198 words
A heating and air conditioning system for an automobile passenger compartment comprising: hollow duct means forming an elongated plenum chamber for passing air therethrough; a warmed heater core within said plenum chamber for heating air flowing through said plenum chamber; a cooled evaporator core within said plenum chamber for cooling and dehumidifying air flowing through said plenum chamber; an inlet in said duct means for admitting air into one end of said elongated plenum chamber; a purge outlet in said duct means for discharging air from the other end of said elongated plenum chamber into the passenger compartment; another outlet in said duct means for discharging air from said other end of said elongated plenum chamber into the passenger compartment; control means for blocking said last mentioned outlet and unblocking said purge outlet when the heating and air conditioning system is inactive and for unblocking said last mentioned outlet and blocking said purge outlet when the system is active; an electric motor powered fan energized through the automobile ignition switch to cause a continuous air flow into said inlet means, through said plenum chamber and alternatively out said purge outlet and said other outlet into the passenger compartment.
Claim 5
Dependent Claim
61 words
The heating and ventilating system as set forth in Claim 2, wherein said duct means extends through a firewall of the automobile to discharge air into the front of the passenger compartment, said purge outlet facing in a direction away from the passenger compartment toward the firewall for preventing a direct flow of air therethrough onto passengers in the passenger compartment.
Claim 6
Dependent Claim
25 words
A heating and air conditioning system as set forth in Claim 2, wherein said purge outlet has a smalleR flow area than said other outlet.
Claim 7
Dependent Claim
57 words
A heating and air conditioning system as set forth in Claim 2, wherein said purge outlet and said other outlet are adjacent one another through said duct means, said control means including a door hinged at one edge to said duct means between said purge outlet and said other outlet and pivotal to alternately block said outlets.
References Cited (Backward Citations)
US3315730A
Cited
US3451468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |