Patent US5594501A successfully refreshed from Google Patents.
Patent US4962811A successfully refreshed from Google Patents.
US4962811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Altemira Co Ltd
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Filing: 1989-10-17
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Granted: 1990-10-16
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Expires: 2009-10-17
Abstract
Abstract A heat exchanger has a tubular inlet header and a tubular outlet header, each formed in its peripheral wall with a slot extending axially thereof, and a zigzag tube comprising a plurality of straight tube portions arranged in parallel to one another and bent portions each interconnecting the immediately adjacent straight tube portions at their upper or lower ends. The tube portions at opposite ends of the flat tube are joined to the respective headers with the unconnected end of each tube portion inserted in the slot. An extension of the center line of the flat tube portion inserted in the outlet header does not intersect the center line of the outlet header.
Inventors
- 👤 Yuji Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:06
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/026; F28F9/0265; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/047; F28D1/0477; F28D1/0478; F28F9/0243; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/495; Y10S165/497
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
177 words
A heat exchanger comprising: a tubular inlet header and a tubular outlet header, each formed in a respective peripheral wall with a slot extending axially thereof, the tubular outlet header is formed with the slot on a line where the peripheral wall thereof intersects a plane containing a center line of the outlet header; and a zigzag flat tube including a plurality of straight tube portions arranged in parallel to one another, the straight tube portion at one end of the flat tube is present in the plane containing the center line of the tubular outlet header, the straight tube portion being bent at an end thereof inserted in the tubular outlet header, and bent portions each interconnecting immediately adjacent straight tube portions at respective ends, the straight tube portions at opposite ends of the flat tube being joined to the respective headers with an unconnected end of each straight tube portion inserted in the slot, an extension of the center line of the bent portion does not intersect the center line of the tubular outlet header.
Claim 2
Dependent Claim
177 words
A heat exchanger comprising: a tubular inlet header and a tubular outlet header, each formed in a respective peripheral wall with a slot extending axially thereof, the tubular outlet header is formed with the slot on a line where the peripheral wall thereof intersects a plane containing a center line of the outlet header; and a zigzag flat tube including a plurality of straight tube portions arranged in parallel to one another, the straight tube portion at one end of the flat tube is present in the plane containing the center line of the tubular outlet header, the straight tube portion being bent at an end thereof inserted in the tubular outlet header, and bent portions each interconnecting immediately adjacent straight tube portions at respective ends, the straight tube portions at opposite ends of the flat tube being joined to the respective headers with an unconnected end of each straight tube portion inserted in the slot, an extension of the center line of the bent portion does not intersect the center line of the tubular outlet header.
Claim 3
Dependent Claim
46 words
A heat exchanger as defined in claim 1 wherein the center line of the bent portion of the straight tube portion providing one end of the flat tube and inserted in the outlet header makes an angle of 10° to 90 degrees with a vertical line.
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) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |