US5052480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe for coolant condenser
Assignee: Marunaka Seisakusho YK
•
Filing: 1990-05-01
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Granted: 1991-10-01
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Expires: 2010-05-01
Abstract
Abstract A header pipe for an automobile coolant condenser having a W-shaped profile in longitudinal cross section such that the projecting portions of the profile makes two-point contact with the ends of the corrugated fins.
Inventors
- 👤 Ichio Nakajima
- 👤 Tsuneo Kousaka
- 👤 Noboru Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:06
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0243; F28F9/0219; F28F9/0224; F28F9/04; F28F9/16; F28F9/18; F28D; F28D21/00; F28D2021/0019; F28D2021/008; F28D2021/0084
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
In a coolant condenser having a pair of header pipes spanned by a plurality of heat exchange tubes having ends adapted to be inserted in slots in said header pipes and corrugated fins arranged between adjacent heat exchange tubes, the improvement wherein the wall sections of the header pipe, between adjacent slots, has a W-shaped profile in longitudinal cross section, having a central depressed portion straddled by a pair of projecting portions such that said projecting portions engage and support the adjacent end surface of said corrugated fins.
Claim 2
Dependent Claim
88 words
In a coolant condenser having a pair of header pipes spanned by a plurality of heat exchange tubes having ends adapted to be inserted in slots in said header pipes and corrugated fins arranged between adjacent heat exchange tubes, the improvement wherein the wall sections of the header pipe, between adjacent slots, has a W-shaped profile in longitudinal cross section, having a central depressed portion straddled by a pair of projecting portions such that said projecting portions engage and support the adjacent end surface of said corrugated fins.
Claim 3
Dependent Claim
31 words
The improvement according to claim 1, wherein said header pipe is formed of two longitudinal halves, said halves being stamped and provided with partitioning plates prior to securing said halves together.
Claim 4
Dependent Claim
19 words
The improvement according to claim 1, wherein said depressed and projecting portions are disposed transversely to the longitudinal axis.
References Cited (Backward Citations)
FR1350811A
Cited
US4881594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |