US3848371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reconditioning a heat exchanger
Assignee: Individual
•
Filing: 1973-07-26
•
Granted: 1974-11-19
•
Expires: 1993-07-26
Abstract
Abstract A method of reconditioning an annular sealing surface on the header of a heat exchanger, in which a tool for finishing the sealing surface is supported on a ring, with suitable feed adjustments for the tool relative to the ring, and the ring in turn is rotatably supported upon a circular track that is attached around the header in a properly aligned position.
Inventors
- 👤 L Dillinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49352; Y10T29/49718; Y10T29/49719; Y10T409/00; Y10T409/30; Y10T409/303752
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
209 words
The method of reconditioning a generally circular header for a heat exchanger, which has a return tube bundle protruding from the center thereof and a plurality of studs protruding from the outer circumference thereof and projecting parallel to the tubes, by finishing an annular sealing surface which lies intermediate to said tubes and said studs, comprising the steps of: placing a circular rail about said header and concentric to said annular sealing surface and aligned parallel thereto; placing a ring in retentive engagement with said rail and rotatable thereon; selecting a surface finishing tool having a tool support and having a feed adjustment which is adjustable in two dimensions relative to said support; attaching said tool support to said ring in a fixed circumferential position thereon such that said tool support projects beyond and over said studs, and said tool may be adjusted axially of said ring so as to engage the annular sealing surface and cut same to a desired depth, and said tool may also be adjusted radially of said ring so as to sweep the full radial width of the annular sealing surface; and concurrently rotating said ring on said track, operating said tool, and varying said feed adjustment so as to finish the sealing surface.
Claim 2
Independent Claim
209 words
The method of reconditioning a generally circular header for a heat exchanger, which has a return tube bundle protruding from the center thereof and a plurality of studs protruding from the outer circumference thereof and projecting parallel to the tubes, by finishing an annular sealing surface which lies intermediate to said tubes and said studs, comprising the steps of: placing a circular rail about said header and concentric to said annular sealing surface and aligned parallel thereto; placing a ring in retentive engagement with said rail and rotatable thereon; selecting a surface finishing tool having a tool support and having a feed adjustment which is adjustable in two dimensions relative to said support; attaching said tool support to said ring in a fixed circumferential position thereon such that said tool support projects beyond and over said studs, and said tool may be adjusted axially of said ring so as to engage the annular sealing surface and cut same to a desired depth, and said tool may also be adjusted radially of said ring so as to sweep the full radial width of the annular sealing surface; and concurrently rotating said ring on said track, operating said tool, and varying said feed adjustment so as to finish the sealing surface.
Claim 3
Dependent Claim
44 words
The method of claim 1 wherein a rail support frame is placed about said header and removably attached thereto, is attached to said rail, and is adjusted so as to align said rail parallel to the desired finish level of said annular sealing surface.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein said ring is placed upon said track, and flanges are attached to said ring which extend down and underneath the sides of said track so as to retain said ring on said track.
Claim 5
Independent Claim
178 words
The method of reconditioning a generally circular header for a heat exchanger, which has a return tube bundle protruding from the center thereof, by finishing an annular sealing surface surrounding said return tube bundle, comprising the steps of: placing a circular rail about said header and concentric to said annular sealing surface And aligned parallel thereto; placing a ring in retentive engagement with said rail and rotatable thereon; selecting a surface finishing tool having a tool support and having a feed adjustment which is adjustable in two dimensions relative to said support; attaching said tool support to said ring in a fixed circumferential position thereon such that said tool may be adjusted axially of said ring so as to engage the annular sealing surface and cut same to a desired depth, and said tool may also be adjusted radially of said ring so as to sweep the full radial width of the annular sealing surface; and concurrently rotating said ring on said track, operating said tool, and varying said feed adjustment so as to finish the sealing surface.
Claim 6
Independent Claim
178 words
The method of reconditioning a generally circular header for a heat exchanger, which has a return tube bundle protruding from the center thereof, by finishing an annular sealing surface surrounding said return tube bundle, comprising the steps of: placing a circular rail about said header and concentric to said annular sealing surface And aligned parallel thereto; placing a ring in retentive engagement with said rail and rotatable thereon; selecting a surface finishing tool having a tool support and having a feed adjustment which is adjustable in two dimensions relative to said support; attaching said tool support to said ring in a fixed circumferential position thereon such that said tool may be adjusted axially of said ring so as to engage the annular sealing surface and cut same to a desired depth, and said tool may also be adjusted radially of said ring so as to sweep the full radial width of the annular sealing surface; and concurrently rotating said ring on said track, operating said tool, and varying said feed adjustment so as to finish the sealing surface.
Claim 7
Dependent Claim
44 words
The method of claim 4 wherein a rail support frame is placed about said header and removably attached thereto, is attached to said rail, and is adjusted so as to align said rail parallel to the desired finish level of said annular sealing surface.
Claim 8
Dependent Claim
39 words
The method of claim 4 wherein said ring is placed upon said track, and flanges are attached to said ring which extend down and underneath the sides of said track so as to retain said ring on said track.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |