US3779307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and cooling system for motor vehicles
Assignee: SU DEUTSCHE KUHLERFAB JULIUS F
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Filing: 1971-11-26
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Granted: 1973-12-18
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Expires: 1991-11-26
Abstract
Abstract A heating and cooling system for motor vehicles having a primary circuit including a pump driven by the engine for cooling the engine of the motor vehicle and a secondary circuit including a pump driven independently of the engine for heating and cooling the passenger compartment of the motor vehicle. The two circuits are connected by a 4-way mixing valve or a hydraulic bridge so that the same coolant circulates through both circuits, but the circulation of coolant through the secondary circuit is independent of engine r.p.m. The secondary circuit further includes means to regulate the amount of hot coolant coming from the engine and cold coolant coming from a cooling means which enters the passenger compartment air heat exchanger so that the same heat exchanger can continuously control the temperature of the air passing therethrough from cold to hot.
Inventors
- 👤 P Weiss
- 👤 H Bardong
- 👤 W Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:36
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00007
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
246 words
A heating and cooling system for a motor vehicle comprising: a primary circuit comprising an engine, a radiator, primary circuit pipe means for providing passageways for coolant between said engine and said radiator, and first pump means driven by said engine for circulating coolant through said primary circuit pipe means; a secondary circuit comprising heat exchange means for regulating the temperature of air blowing therethrough, cooling means for cooling the coolant that passes therethrough, and secondary circuit pipe means for providing passageways for coolant between said heat exchange means and said cooling means, said secondary circuit pipe means comprising a first pipe means for carrying coolant from said cooling means to said heat exchange means and a second pipe means for carrying coolant from said heat exchange means to said cooling means; fan means for blowing air through said heat exchange means; multichannel mixing means for connecting said primary and secondary circuits, said multichannel mixing means comprising a multichannel mixing device, first inlet means and first outlet means for providing passageways for coolant between said device and said primary circuit pipe means, second outlet means for providing a passageway for coolant from said device to said first pipe means of said secondary circuit pipe means, and second inlet means for providing a passageway for coolant from said second pipe means of said secondary circuit pipe means to said device; and second pump means driven independently of said engine for circulating coolant through said heat exchange means.
Claim 2
Dependent Claim
246 words
A heating and cooling system for a motor vehicle comprising: a primary circuit comprising an engine, a radiator, primary circuit pipe means for providing passageways for coolant between said engine and said radiator, and first pump means driven by said engine for circulating coolant through said primary circuit pipe means; a secondary circuit comprising heat exchange means for regulating the temperature of air blowing therethrough, cooling means for cooling the coolant that passes therethrough, and secondary circuit pipe means for providing passageways for coolant between said heat exchange means and said cooling means, said secondary circuit pipe means comprising a first pipe means for carrying coolant from said cooling means to said heat exchange means and a second pipe means for carrying coolant from said heat exchange means to said cooling means; fan means for blowing air through said heat exchange means; multichannel mixing means for connecting said primary and secondary circuits, said multichannel mixing means comprising a multichannel mixing device, first inlet means and first outlet means for providing passageways for coolant between said device and said primary circuit pipe means, second outlet means for providing a passageway for coolant from said device to said first pipe means of said secondary circuit pipe means, and second inlet means for providing a passageway for coolant from said second pipe means of said secondary circuit pipe means to said device; and second pump means driven independently of said engine for circulating coolant through said heat exchange means.
Claim 3
Dependent Claim
17 words
A system in accordance with claim 1 wherein said multichannel mixing device is a multichannel mixing valve.
Claim 4
Dependent Claim
45 words
A system in accordance with claim 1 wherein said secondary circuit further includes regulating means, connected to said secondary circuit pipe means, for regulating the ratio of coolant from said cooling means to that from said multichannel mixing means which enters said heat exchange means.
Claim 5
Dependent Claim
40 words
A system in accordance with claim 3 wherein said regulating means comprises a three-way valve connected to said first pipe means of said secondary circuit at the point where said second outlet means of said multichannel mixing means connects thereto.
Claim 6
Dependent Claim
98 words
A system in accordance with claim 3 wherein said regulating means comprises a third pump means for circulating coolant through said cooling means wherein said second pump means is connected to said second outlet means of said multi-channel mixing means and said third pump means is connected to said first pipe means of said secondary circuit upstream of the point where said second outlet means of said multichannel mixing means connects thereto or to said second pipe means of said secondary circuit downstream of the point where said second inlet means of said multichannel mixing means connects thereto.
Claim 7
Dependent Claim
18 words
A system in accordance with claim 5 wherein said third pump means is driven independently of said engine.
Claim 8
Dependent Claim
16 words
A system in accordance with claim 1 wherein said multichannel mixing device is a hydraulic bridge.
Claim 9
Dependent Claim
93 words
A system in accordance with claim 7 wherein said primary circuit pipe means comprises a first conduit means for carrying coolant from said engine to said radiator and a second conduit means for carrying coolant from said radiator to said engine, and further wherein said first inlet means of said multi-channel mixing means connects to said primary circuit pipe means at said first conduit means and said first outlet means connects to said primary circuit pipe means at said first conduit means downstream of the point where said first inlet means connects thereto.
Claim 10
Dependent Claim
35 words
A system in accordance with claim 7 wherein the connections of said second outlet and inlet means of said multichannel mixing device to said hydraulic bridge are in the neutral area of said hydraulic bridge.
Claim 11
Dependent Claim
82 words
A system in accordance with claim 1 wherein said primary circuit pipe means comprises a first conduit means for carrying coolant from said engine to said radiator and a second conduit means for carrying coolant from said radiator to said engine, and further wherein said first inlet means of said multi-channel mixing means connects to said primary circuit pipe means at said first conduit means and said first outlet means connects to said primary circuit pipe means at said second conduit means.
Claim 12
Dependent Claim
90 words
A system in accordance with claim 1 wherein said primary circuit pipe means comprises a first conduit means for carrying coolant from said engine to said radiator and a second conduit means for carrying coolant from said radiator to said engine, and wherein said primary circuit further includes by-pass means connected to said first and said second conduit means for causing said coolant to by-pass said radiator when activated and thermostat means connected to said first conduit means and said by-pass means for activating said by-pass means at predetermined times.
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |