US3593783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger for motor vehicle heaters
Assignee: Eberspaecher Climate Control Systems GmbH and Co KG
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Filing: 1968-07-12
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Granted: 1971-07-20
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Expires: 1988-07-12
Abstract
Abstract A heat exchanger for motor vehicle heater comprises two mating outer half shells and two mating inner half shells, the outer and inner half shells preferably being integral with each other. The shells are formed with stamped mating half ducts which, when the half shells are assembled in mating relation, define respective separated flow paths for a heating medium and for a fluid heat exchange medium. The half shells may be stamped to conjointly define a combustion chamber on the axis of symmetry.
Inventors
- 👤 Gerhard Muller
- 👤 Fritz Mohring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2212; F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0037; B60H2001/2268; B60H2001/2271; F28F; F28F2250/00; F28F2250/10; F28F2250/102; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/373
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
206 words
A heat exchanger for motor vehicle heaters comprising, in combination, two mating inner half shells formed with stamped mating half ducts and being secured together to form a sinously arranged first flow path, said first flow path comprising consecutively arranged flow path sections disposed at least in part in coextensive relationship with one another and angularly bent flow path sections interconnecting immediately succeeding said flow path sections for changing the direction of flow through said first flow path, two mating outer half shells formed with stamped half ducts and being secured together and enclosing said mating inner half shells, said outer half shells being spaced outwardly from said inner half shells and forming therebetween a second flow path separated from said first flow path so that a heating gas flows within one of said first and second flow paths in indirect heat transfer relationship with a fluid heat exchange medium flowing in the other of said first and second flow paths, and a plurality of openings spaced along said first flow path extending between coextensively disposed said flow path sections for bypassing flow between the interconnected said flow path sections for preventing the development of vibrations due to the sinuous arrangement of said first flow path.
Claim 2
Dependent Claim
206 words
A heat exchanger for motor vehicle heaters comprising, in combination, two mating inner half shells formed with stamped mating half ducts and being secured together to form a sinously arranged first flow path, said first flow path comprising consecutively arranged flow path sections disposed at least in part in coextensive relationship with one another and angularly bent flow path sections interconnecting immediately succeeding said flow path sections for changing the direction of flow through said first flow path, two mating outer half shells formed with stamped half ducts and being secured together and enclosing said mating inner half shells, said outer half shells being spaced outwardly from said inner half shells and forming therebetween a second flow path separated from said first flow path so that a heating gas flows within one of said first and second flow paths in indirect heat transfer relationship with a fluid heat exchange medium flowing in the other of said first and second flow paths, and a plurality of openings spaced along said first flow path extending between coextensively disposed said flow path sections for bypassing flow between the interconnected said flow path sections for preventing the development of vibrations due to the sinuous arrangement of said first flow path.
Claim 3
Dependent Claim
58 words
A heat exchanger for motor vehicle heaters, as set forth in claim 1, wherein said first flow path having an inlet at one end thereof and an outlet at the opposite end thereof and said first flow path being arranged to contain the heating gas with the fluid heat exchange medium being contained within said second flow path.
Claim 4
Dependent Claim
39 words
A heat exchanger for motor vehicle heaters, as set forth in claim 2, wherein the portion of said first flow path extending from its inlet end forming a combustion chamber for supplying heating gas into said flow path sections.
Claim 5
Dependent Claim
33 words
A heat exchanger for motor vehicle heaters, as set forth in claim 3, wherein said openings between said flow path sections being spaced downstream in said first flow path from said combustion chamber.
Claim 6
Dependent Claim
54 words
A heat exchanger for motor vehicle heaters, as set forth in claim 4, wherein said first flow path branching into two separate consecutively arranged sets of flow path sections with the oppositely disposed outlet ends of said flow path sections being in communication with each other at the outlet from said first flow path.
Claim 7
Dependent Claim
34 words
A heat exchanger for motor vehicle heaters, as set forth in claim 1, in which an exhaust nipple is stamped into said inner half shells and forms the outlet from said first flow path.
Claim 8
Dependent Claim
33 words
A heat exchanger for motor vehicle heaters, as set forth in claim 4, wherein said openings extending between said flow path sections being disposed perpendicular to the axis of said flow path sections.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |