US4645000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube and fin heat exchanger
Assignee: Motors Liquidation Co
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Filing: 1986-04-21
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Granted: 1987-02-24
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Expires: 2006-04-21
Abstract
Abstract A tube and fin heat exchanger is disclosed comprising a pair of tanks, a plurality of tubes of non-circular cross section connected at their ends to tanks, and a plurality of corrugated fin strips each arranged between and extending along the length of adjacent ones of the tubes. Each of the fin strips has a constant corrugation spacing extending along an intermediate and almost the entire length of the tubes and a smaller corrugation spacing extending the remainder of the length of the tubes to their ends so as to provide increased resistance to ballooning of the tubes at their ends by internal pressure.
Inventors
- 👤 Louis Scarselletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:45
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/0535; F28D1/05366; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/126; F28F2215/00; F28F2215/04; F28F2225/00; F28F2225/04; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/486; Y10S165/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A tube and fin heat exchanger comprising a pair of tanks, a plurality of tubes of non-circular cross section connected at their ends to said tanks, a plurality of corrugated fin strips each arranged between and extending along the length of adjacent ones of said tubes, characterized by each said fin strip having a constant corrugation spacing extending along an intermediate and almost the entire length of said tubes and further having a substantially smaller corrugation spacing extending the remainder of the length of the tubes to their ends so as to provide increased resistance to ballooning of the tubes at their ends by internal pressure.
Claim 2
Dependent Claim
106 words
A tube and fin heat exchanger comprising a pair of tanks, a plurality of tubes of non-circular cross section connected at their ends to said tanks, a plurality of corrugated fin strips each arranged between and extending along the length of adjacent ones of said tubes, characterized by each said fin strip having a constant corrugation spacing extending along an intermediate and almost the entire length of said tubes and further having a substantially smaller corrugation spacing extending the remainder of the length of the tubes to their ends so as to provide increased resistance to ballooning of the tubes at their ends by internal pressure.
Claim 3
Dependent Claim
130 words
A tube and fin heat exchanger comprising a pair of tanks, a plurality of flat-sided tubes connected at their ends to said tanks, a plurality of corrugated fin strips each arranged between and extending along the length of adjacent ones of said tubes, characterized by each said fin strip having a constant corrugation spacing extending along an intermediate and almost the entire length of said tubes so as to form fin portions inclined to the tubes and further having a substantially smaller corrugation spacing extending the remainder of the length of the tubes to their ends so as to form fin portions at substantially right angles to and adjacent the ends of the tubes to thereby provide increased resistance to ballooning of the tubes at their ends by internal pressure.
Claim 4
Dependent Claim
130 words
A tube and fin heat exchanger comprising a pair of tanks, a plurality of flat-sided tubes connected at their ends to said tanks, a plurality of corrugated fin strips each arranged between and extending along the length of adjacent ones of said tubes, characterized by each said fin strip having a constant corrugation spacing extending along an intermediate and almost the entire length of said tubes so as to form fin portions inclined to the tubes and further having a substantially smaller corrugation spacing extending the remainder of the length of the tubes to their ends so as to form fin portions at substantially right angles to and adjacent the ends of the tubes to thereby provide increased resistance to ballooning of the tubes at their ends by internal pressure.
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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |