Patent US4821795A successfully refreshed from Google Patents.
US4821795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Undulated heat exchanger fin
Assignee: MCCORD HEAT TRASFER Corp A CORP OF
•
Filing: 1987-10-22
•
Granted: 1989-04-18
•
Expires: 2007-10-22
Abstract
Abstract A heat exchanger assembly (10) of the tube-fin type comprises a housing (12), a plurality of tubes (24), and a plurality of fins (26). The fins (26) comprise a generally flat plate (27) and have a plurality of holes (28) therethrough. The tubes (24) extend through the holes (28). The fins (26) further include a plurality of undulations (30). The undulations project outwardly from the plate (27) and are arranged in a plurality of engaging rows (32, 34, 36). The undulations (30) are offset between the rows (32, 34, 36) so that the crests (40) of the undulations (30) are not linear in the direction parallel to the width of the plate (27).
Inventors
- 👤 James W. B. Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:19
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/32; F28F1/325; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/442; Y10S165/443
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
125 words
A heat exchanger assembly (10) of the tube-fin type comprising: a housing (12); a plurality of fins (26) having a plurality of holes (28) therethrough, a plurality of tubes (24) adapted for disposition within said housing (12) and extending through said holes (28); said assembly (10) characterized by said fins (26) including a plurality of undulations (30) arranged in rows (32, 34, 36) between adjacent of said holes (28) and spaced from one another along said rows (32, 34, 36) with the spacing between adjacent undulations (30) varying from one of said rows (32, 34, 36) to the next of said rows (32, 34, 36) and each of said rows (32, 34, 36) including a flat portion (38) of said fin between said undulations (30).
Claim 2
Dependent Claim
125 words
A heat exchanger assembly (10) of the tube-fin type comprising: a housing (12); a plurality of fins (26) having a plurality of holes (28) therethrough, a plurality of tubes (24) adapted for disposition within said housing (12) and extending through said holes (28); said assembly (10) characterized by said fins (26) including a plurality of undulations (30) arranged in rows (32, 34, 36) between adjacent of said holes (28) and spaced from one another along said rows (32, 34, 36) with the spacing between adjacent undulations (30) varying from one of said rows (32, 34, 36) to the next of said rows (32, 34, 36) and each of said rows (32, 34, 36) including a flat portion (38) of said fin between said undulations (30).
Claim 3
Dependent Claim
30 words
An assembly as set forth in claim 1 further characterized by said undulations (30) being offset from one of said rows (32, 34, 36) to another one of said rows.
Claim 4
Dependent Claim
30 words
An assembly as set forth in claim 2 further characterized by the ends of said rows (32, 34, 36) being disposed in an arc about adjacent of said holes (28).
Claim 5
Dependent Claim
19 words
An assembly as set forth in claim 3 further characterized by said rows (32, 34, 36) engaging one another.
Claim 6
Dependent Claim
20 words
An assembly as set forth in claim 4 further characterized by said undulations (30) projecting outwardly from said fin (26).
Claim 7
Dependent Claim
65 words
An assembly as set forth in claim 5 further characterized by a first (32) of said rows comprising three of said undulations (30) immediately adjacent one another, a second (34) of said rows comprising two of said undulations (30) with one of said a flat portions (38) therebetween, and a third (36) of said rows comprising two of said undulations (30) immediately adjacent one another.
Claim 8
Dependent Claim
19 words
An assembly as set forth in claim 6 further characterized by said tubes (24) having a substantially circular cross-section.
Claim 9
Dependent Claim
24 words
An assembly as set forth in claim 7 further characterized by said tubes (24) being disposed parallel to each other within said housing (12).
Claim 10
Dependent Claim
40 words
An assembly as set forth in claim 8 further characterized by said housing (12) being generally cylindrical and having a hot fluid inlet (14), a hot fluid outlet (16), a cooling fluid inlet (18), and a cooling fluid outlet (20).
Claim 11
Dependent Claim
33 words
An assembly as set forth in claim 9 further characterized by said housing further including a plurality of baffles disposed therein for directing the flow of the hot fluid over said tubes (24).
Claim 12
Dependent Claim
42 words
An assembly as set forth in claim 10 further characterized by said housing further including a cooling fluid inlet reservoir (19) and a cooling fluid outlet reservoir 21, said tubes (24) extending between said inlet reservoir (19) and said outlet reservoir (21).
Claim 13
Dependent Claim
106 words
A fin (26) for use in a heat exchanger of the tube-fin type comprising a generally flat plate (27) including a plurality of holes (28) therethrough for supporting a plurality of tubes (24), and characterized by including a plurality of undulations (30) arranged in rows (32, 34, 36) between adjacent of said holes (28) and spaced from one another along said rows (32, 34, 36) with the spacing varying from one of said rows (32, 34, 36) to the next of said rows (32, 34, 36) and each said rows (32, 34, 36) including a flat portion (38) of said fin (26) between said undulations (30).
Claim 14
Dependent Claim
106 words
A fin (26) for use in a heat exchanger of the tube-fin type comprising a generally flat plate (27) including a plurality of holes (28) therethrough for supporting a plurality of tubes (24), and characterized by including a plurality of undulations (30) arranged in rows (32, 34, 36) between adjacent of said holes (28) and spaced from one another along said rows (32, 34, 36) with the spacing varying from one of said rows (32, 34, 36) to the next of said rows (32, 34, 36) and each said rows (32, 34, 36) including a flat portion (38) of said fin (26) between said undulations (30).
Claim 15
Dependent Claim
33 words
A fin as et forth in claim 12 further characterized by said undulations (30) being offset from one of said rows (32, 34, 36) to another one of said rows (32, 34, 36).
Claim 16
Dependent Claim
30 words
A fin as set forth in claim 13 further characterized by the ends of said rows (32, 34, 36) being disposed in an arc about adjacent of said holes (28).
Claim 17
Dependent Claim
19 words
A fin as set forth in claim 14 further characterized by said rows (32, 34, 36) engaging one another.
Claim 18
Dependent Claim
19 words
A fin as set forth in claim 15 further characterized by said undulations (30) projecting from said fin (26).
Claim 19
Dependent Claim
62 words
A fin as set forth in claim 16 further characterized by a first (32) of said rows comprising three of said undulations (30) immediately adjacent one another, a second (34) of said rows comprising two of said undulations (30) with a flat portion (38) therebetween, and a third (36) of said rows comprising two of said undulations (30) immediately adjacent one another.
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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |