Patent US2664102A successfully refreshed from Google Patents.
Patent US4305459A successfully refreshed from Google Patents.
US4305459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Mahle Behr GmbH and Co KG
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Filing: 1980-01-23
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Granted: 1981-12-15
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Expires: 2000-01-23
Abstract
Abstract A passage is provided in a heat exchanger water compartment to permit extension of a tube therethrough and at the same time assist in sealing the tube and passage interface. The distance between the intersection of the lower bottom edge of the water compartment bottom part with the inner edge of the passage and the intersection of the horizontal extension of the upper edge of the bottom part in the direction of the passage extension has a positive value.
Inventors
- 👤 Manfred Nonnenmann
- 👤 Helmut Bardong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:22
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/0219; F28F9/0224; F28F9/0226; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/492; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
In a solderless heat exchanger including a water compartment, having a substantially planar bottom having upper and lower surfaces, and a top, and a block of finned tubes passing through the water compartment bottom, in which the tubes are seated therein by expansion of the tubes, the improvement by which the interconnections of the tubes with the water compartment bottom are made tight with respect to water and air, without additional sealing elements, wherein the tubes are surrounded by passages comprising a portion of the bottom in which the entire thickness of the bottom is bent to surround said tubes and wherein, for each said tube, the line of intersection of (1) the curved portion of that surface of said water compartment bottom which contacts said tube, with (2) the internal cylindrical portion of said surface which is in contact with said tube lies between planar extensions, at said tube, of said upper and lower surfaces of said water compartment bottom.
Claim 2
Dependent Claim
161 words
In a solderless heat exchanger including a water compartment, having a substantially planar bottom having upper and lower surfaces, and a top, and a block of finned tubes passing through the water compartment bottom, in which the tubes are seated therein by expansion of the tubes, the improvement by which the interconnections of the tubes with the water compartment bottom are made tight with respect to water and air, without additional sealing elements, wherein the tubes are surrounded by passages comprising a portion of the bottom in which the entire thickness of the bottom is bent to surround said tubes and wherein, for each said tube, the line of intersection of (1) the curved portion of that surface of said water compartment bottom which contacts said tube, with (2) the internal cylindrical portion of said surface which is in contact with said tube lies between planar extensions, at said tube, of said upper and lower surfaces of said water compartment bottom.
Claim 3
Dependent Claim
26 words
A heat exchanger in accordance with claim 1, wherein said passages are formed such that they extend in the direction away from the water compartment top.
Claim 4
Dependent Claim
25 words
A heat exchanger in accordance with claim 1 wherein said passages are formed such that they extend in the direction toward the water compartment top.
Claim 5
Dependent Claim
29 words
A heat exchanger is accordance with claim 3, wherein the end of each said tube passing into the water compartment extends beyond the end of the respective passage thereof.
References Cited (Backward Citations)
BE572760A
Cited
US513620A
Cited
US2735698A
Cited
US940870A
Cited
US993883A
Cited
US2009863A
Cited
US2184658A
Cited
US2488627A
Cited
US2573161A
Cited
US2656155A
Cited
US2695446A
Cited
GB699032A
Cited
US2807445A
Cited
US3027142A
Cited
US2886881A
Cited
US3283402A
Cited
US3583478A
Cited
US3557903A
Cited
US3628923A
Cited
GB1353928A
Cited
DE2134028A1
Cited
US3749161A
Cited
US3787945A
Cited
US4159741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |