US3791003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of frabricating a plural finned heat exchanger
Assignee: Peerless of America Inc
•
Filing: 1972-08-07
•
Granted: 1974-02-12
•
Expires: 1992-08-07
Abstract
Abstract A tubular heat exchanger having spine-type fins formed integrally from the wall thereof and disposed therearound, with the fins cut from ribs extending longitudinally of the heat exchanger, and a method of manufacture which includes rotary movement between a tool and an elongated, ribbed tubular member relative to the longitudinal axis of the latter.
Inventors
- 👤 S Pasternak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:26
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207; B21J; B21J5/00; B21J5/06; B21J5/068; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49382
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
The method of making finned heat exchanger tubing comprising a. providing an elongated tube having longitudinally extending external ribs thereon, and b. using a cutting tool having a cutting edge and a face projecting therefrom, rotating said cutting and said tube relative to each other around the longitudinal axis of said tube in such position as to simultaneously cause 1. said cutting edge to slice said ribs to afford rib portions cut from other rib portions, and 2. said face to bend said first mentioned rib portions outwardly away from said other rib portions.
Claim 2
Independent Claim
94 words
The method of making finned heat exchanger tubing comprising a. providing an elongated tube having longitudinally extending external ribs thereon, and b. using a cutting tool having a cutting edge and a face projecting therefrom, rotating said cutting and said tube relative to each other around the longitudinal axis of said tube in such position as to simultaneously cause 1. said cutting edge to slice said ribs to afford rib portions cut from other rib portions, and 2. said face to bend said first mentioned rib portions outwardly away from said other rib portions.
Claim 3
Dependent Claim
16 words
said face to bend said first mentioned rib portions outwardly away from said other rib portions.
Claim 4
Dependent Claim
16 words
said face to bend said first mentioned rib portions outwardly away from said other rib portions.
Claim 5
Dependent Claim
23 words
The method defined in claim 1, and in which a. said slicing and bending are simultaneously accomplished on a plurality of said ribs.
Claim 6
Dependent Claim
22 words
The method defined in claim 1, and in which a. said ribs are substantially parallel to the longitudinal axis of said tube.
Claim 7
Dependent Claim
21 words
The method defIned in claim 1, and in which a. said ribs are curved around said tube in substantially helical form.
Claim 8
Dependent Claim
23 words
The method defined in claim 1, and in which a. said tool is stationary during said relative rotation of said tool and tube.
Claim 9
Dependent Claim
23 words
The method defined in claim 1, and in which a. said tube is stationary during said relative rotation of said tool and tube.
Claim 10
Dependent Claim
45 words
The method defined in claim 1, and in which a. said tube rotates around its longitudinal axis during said relative rotation of said tool and tube b. said tool rotates around the periphery of said tube during said relative rotation of said tool and tube.
Claim 11
Dependent Claim
75 words
The method defined in claim 1, and in which a. said tool, when in operative engagement with one of said ribs for so slicing and bending said one rib, is, at all times during said relative rotation of said tool and tube, in position to so slicingly and bendingly engage the next adjacent rib in the direction of travel of said tool relative to said tube during said relative rotation of said tool and tube.
Claim 12
Dependent Claim
37 words
The method defined in claim 8, and in which a. said tool is in operative simultaneous engagement with a plurality of said ribs whereby said slicing and raising are simultaneously accomplished on a plurality of said ribs.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |