US6718956B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooler of an exhaust gas recirculation system and exhaust gas recirculation system including one such cooler
Assignee: Hanon Systems Corp
•
Filing: 2001-10-02
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Granted: 2004-04-13
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Expires: 2021-10-02
Abstract
Abstract A cooler of an exhaust gas recirculating system comprises a housing including coolant inflow and outflow ports and at least one bypass pipe arranged within said housing.
Inventors
- 👤 Bernhard Klipfel
- 👤 Ralf Hördt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:14
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1669; F02; F02M; F02M26/00; F02M26/13; F02M26/22; F02M26/23; F02M26/25; F02M26/29; F02M26/32; F28F; F28F27/00; F28F27/02; F28F2250/00; F28F2250/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
A cooler of an exhaust gas recirculating system comprising a housing including coolant inflow and outflow ports for cooling fluid, at least one bypass pipe for hot exhaust gas, wherein said bypass pipe is arranged within said housing, said bypass pipe is a double-walled pipe, and a vacuum is formed between both walls of said double-walled pipe to minimize cooling of the hot bypass exhaust gas flowing through the bypass pipe.
Claim 2
Dependent Claim
71 words
A cooler of an exhaust gas recirculating system comprising a housing including coolant inflow and outflow ports for cooling fluid, at least one bypass pipe for hot exhaust gas, wherein said bypass pipe is arranged within said housing, said bypass pipe is a double-walled pipe, and a vacuum is formed between both walls of said double-walled pipe to minimize cooling of the hot bypass exhaust gas flowing through the bypass pipe.
Claim 3
Dependent Claim
20 words
The cooler as set forth in claim 1 , wherein said bypass pipe is arranged substantially centrally in said housing.
Claim 4
Dependent Claim
98 words
A cooler of an exhaust gas recirculating system comprising a housing including coolant inflow and outflow ports for cooling fluid, at least one bypass pipe for hot exhaust gas, said bypass pipe being arranged within said housing, wherein said cooler comprises a sole inflow and/or outflow for said exhaust to be recirculated as well as an actuator for closing off at least said bypass pipe, said bypass pipe is a double-walled pipe, and a vacuum is formed between both walls of said double-walled pipe to minimize cooling of the hot bypass exhaust gas flowing through the bypass pipe.
Claim 5
Dependent Claim
98 words
A cooler of an exhaust gas recirculating system comprising a housing including coolant inflow and outflow ports for cooling fluid, at least one bypass pipe for hot exhaust gas, said bypass pipe being arranged within said housing, wherein said cooler comprises a sole inflow and/or outflow for said exhaust to be recirculated as well as an actuator for closing off at least said bypass pipe, said bypass pipe is a double-walled pipe, and a vacuum is formed between both walls of said double-walled pipe to minimize cooling of the hot bypass exhaust gas flowing through the bypass pipe.
Claim 6
Dependent Claim
15 words
The cooler as set forth in claim 3 , wherein said actuator is a flap.
Claim 7
Dependent Claim
20 words
The cooler as set forth in claim 3 , wherein said bypass pipe is arranged substantially centrally in said housing.
Claim 8
Dependent Claim
98 words
A cooler of an exhaust gas recirculating system comprising a housing including coolant inflow and outflow ports for cooling fluid, at least one bypass pipe for hot exhaust gas, said bypass pipe being arranged within said housing, wherein said cooler comprises a sole inflow for said exhaust gas to be recirculated and said bypass pipe as viewed flow-technically is located in the extension of said inflow, said bypass pipe is a double-walled pipe, and a vacuum is formed between both walls of said double-walled pipe to minimize cooling of the hot exhaust gas flowing through the bypass pipe.
Claim 9
Dependent Claim
98 words
A cooler of an exhaust gas recirculating system comprising a housing including coolant inflow and outflow ports for cooling fluid, at least one bypass pipe for hot exhaust gas, said bypass pipe being arranged within said housing, wherein said cooler comprises a sole inflow for said exhaust gas to be recirculated and said bypass pipe as viewed flow-technically is located in the extension of said inflow, said bypass pipe is a double-walled pipe, and a vacuum is formed between both walls of said double-walled pipe to minimize cooling of the hot exhaust gas flowing through the bypass pipe.
Claim 10
Dependent Claim
24 words
The cooler as set forth in claim 6 , wherein said cooler further comprises an actuator for closing off at least said bypass pipe.
Claim 11
Dependent Claim
20 words
The cooler as set forth in claim 6 , wherein said bypass pipe is arranged substantially centrally in said housing.
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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) | 2007-04-13 | 2007-10-13 | 2008-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-13 | 2011-10-13 | 2012-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-13 | 2015-10-13 | 2016-04-13 | $7700.00 | Window Closed / Lapsed |