Patent US4682191A successfully refreshed from Google Patents.
Patent US3673846A successfully refreshed from Google Patents.
US3673846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers
Assignee: Associated Engineering Ltd
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Filing: 1970-04-28
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Granted: 1972-07-04
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Expires: 1990-04-28
Abstract
Abstract This invention relates to an apparatus for producing a heat exchanger fin structure of the type disclosed in FIGS. 1 to 3 of copending U.S. Pat. application Ser. No. 755077. The apparatus comprises means for feeding the corrugated strip forming the fin structure along the direction of the longitudinal plane of the structure to pass restraining means engaging with the corner of an area forming a fin to temporarily restrain or stop the motion of a fin area until at least the next following fin area is inclined towards the restrained area, whereafter the restraining means yield to allow the thus converged fins so formed to pass said means, whereby the resulting corrugated structure has the adjacent fins, extending from either side of a region converging towards each other.
Inventors
- 👤 Henry John Levington
- 👤 Charles Keith Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:44
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/025; F28F3/027; B; B21; B21D; B21D53/00; B21D53/02; B21D53/022; B21D53/025; B21D53/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
216 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, such that the adjacent fins extending from either side of a region converge towards each other; said apparatus comprising means for shaping the strip to form a corrugated structure with the fins extending from either side of a region diverging from each other, or being substantially normal to the said regions, and means for feeding said corrugated structure along the direction of the longitudinal plane of the structure to pass restraining means located at least on one side of said corrugated structure, each said restraining means engaging with the corner between an area forming a fin and a region to temporarily restrain or stop the motion of a fin area until at least the next following fin area is inclined towards the restrained area, whereafter the restraining means yield to allow the thus converged fins so formed to pass said means, whereby the resulting corrugated structure has the adjacent fins, extEnding from either side of a region, converging towards each other.
Claim 2
Dependent Claim
216 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, such that the adjacent fins extending from either side of a region converge towards each other; said apparatus comprising means for shaping the strip to form a corrugated structure with the fins extending from either side of a region diverging from each other, or being substantially normal to the said regions, and means for feeding said corrugated structure along the direction of the longitudinal plane of the structure to pass restraining means located at least on one side of said corrugated structure, each said restraining means engaging with the corner between an area forming a fin and a region to temporarily restrain or stop the motion of a fin area until at least the next following fin area is inclined towards the restrained area, whereafter the restraining means yield to allow the thus converged fins so formed to pass said means, whereby the resulting corrugated structure has the adjacent fins, extEnding from either side of a region, converging towards each other.
Claim 3
Dependent Claim
59 words
Apparatus as claimed in claim 1, wherein the corrugated structure is driven towards the restraining means by means of rotating endless belts arranged on opposite sides of the structure so that it passes between the belts which frictionally engage with the said regions to move the structure through the gap between the belts as they are driven in rotation.
Claim 4
Dependent Claim
77 words
Apparatus as claimed in claim 1, wherein the resilient restraining means comprise a spring-pressed member arranged on either side of the corrugated structure, the members being offset with respect to one another and each member having a shoulder portion which can engage with the corner between a fin area and a region but which is yieldable to allow the corrugated structure to pass therebetween upon a following fin area being inclined towards an area which is restrained.
Claim 5
Dependent Claim
40 words
Apparatus as claimed in claim 1, including means for providing each of the fin areas with louvres, wherein the louvres are formed by said means for shaping the strip to form a corrugated structure, said means including a press tool.
Claim 6
Dependent Claim
34 words
Apparatus as claimed in claim 4, wherein the press tool includes a first section for forming the corrugations and partially forming the louvres and a second section for completing the formation of the louvres.
Claim 7
Dependent Claim
37 words
Apparatus as claimed in claim 4, wherein the press tool includes a first section for forming the corrugations, a second section for partially forming the louvres and a third section for completing the formation of the louvres.
Claim 8
Dependent Claim
32 words
Apparatus as claimed in claim 1, including means for subjecting the corrugated structure to a further operation to ensure that the structure in its finished form has the corrugations substantially fully closed.
Claim 9
Dependent Claim
64 words
Apparatus as claimed in claim 7, including means for subjecting said corrugated structure to an intermittent pressing operation, the pressure being applied substantially at right angles to said regions, and means for restraining the corrugated structure at a position beyond the station where the intermittent pressing operation is carried out, to assist in maintaining the corrugations in the fully closed position during this operation.
Claim 10
Dependent Claim
191 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, said apparatus including punch and die means for shaping the strip to form a corrugated structure with the fins which extend from either side of a region diverging from each other, said punch having two flank faces each formed with serrations, and said die means having two flank faces formed with co-operating serrations, whereby on reciprocation of the punch relative to the die the strip is corrugated and at least partially formed with louvres and wherein the serrations of said die means consist solely of indentations and the serrations of said punch means consist solely of projections, so that louvres are formed in he strip which extend on one side only of the strip, said apparatus including further punch and die means for completing said louvres so that they extend on both sides of the strip.
Claim 11
Dependent Claim
191 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, said apparatus including punch and die means for shaping the strip to form a corrugated structure with the fins which extend from either side of a region diverging from each other, said punch having two flank faces each formed with serrations, and said die means having two flank faces formed with co-operating serrations, whereby on reciprocation of the punch relative to the die the strip is corrugated and at least partially formed with louvres and wherein the serrations of said die means consist solely of indentations and the serrations of said punch means consist solely of projections, so that louvres are formed in he strip which extend on one side only of the strip, said apparatus including further punch and die means for completing said louvres so that they extend on both sides of the strip.
Claim 12
Dependent Claim
157 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, such that the adjacent fins extending from either side of a region converge towards each other; said apparatus comprising means for feeding said corrugated strip in a direction parallel to said median longitudinal plane, means in contact with said corrugated stRip to restrain movement thereof, said means comprising a resiliently-loaded member having a shoulder which engages with successive corners between said fins and those regions which lie in one of said two planes, whereby to cause the corrugations to close up toward one another, at least the fin next to the restrained fin being thus caused to incline toward the restrained fin.
Claim 13
Dependent Claim
157 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, such that the adjacent fins extending from either side of a region converge towards each other; said apparatus comprising means for feeding said corrugated strip in a direction parallel to said median longitudinal plane, means in contact with said corrugated stRip to restrain movement thereof, said means comprising a resiliently-loaded member having a shoulder which engages with successive corners between said fins and those regions which lie in one of said two planes, whereby to cause the corrugations to close up toward one another, at least the fin next to the restrained fin being thus caused to incline toward the restrained fin.
Claim 14
Dependent Claim
33 words
Apparatus as claimed in claim 10, wherein said means for feeding said corrugated strip comprises a pair of endless belts, each belt having a section in contact with a number of said regions.
Claim 15
Dependent Claim
66 words
Apparatus as claimed in claim 10, wherein two said restraining means are provided, one co-operating with successive corners between the fins and those regions in one of said planes and the other co-operating with successive corners between the fins and those regions in the other of said planes, the two restraining means being offset from one another relative to the direction of motion of the strip.
Claim 16
Dependent Claim
178 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, such that the adjacent fins extending from either side of a region converge towards each other; said apparatus comprising means for holding said corrugated strip with the corrugations in a closed-up configuration, and pressing means comprising a base and a top tool, the base having a surface in one of the two planes and in contact with a number of the regions of the strip and the top tool having a surface in the other of the two planes and in contact with a number of the alternate regions of the strip and means to subject the strip to an intermittent pressure between the top tool and the base, the pressure being applied in a direction substantially at right angles to the regions.
Claim 17
Dependent Claim
178 words
Apparatus for producing a fin structure consisting of a metal strip shaped to a corrugated form having areas forming fins alternating with and extending between regions which lie in two planes respectively located on opposite sides of the median longitudinal plane of the corrugated structure and having the fins inclined with respect to each other, such that the adjacent fins extending from either side of a region converge towards each other; said apparatus comprising means for holding said corrugated strip with the corrugations in a closed-up configuration, and pressing means comprising a base and a top tool, the base having a surface in one of the two planes and in contact with a number of the regions of the strip and the top tool having a surface in the other of the two planes and in contact with a number of the alternate regions of the strip and means to subject the strip to an intermittent pressure between the top tool and the base, the pressure being applied in a direction substantially at right angles to the regions.
Claim 18
Dependent Claim
39 words
Apparatus as claimed in claim 13 wherein said means to subject the strip to an intermittent pressure includes a cam arranged on each rotation to load the top tool relative to the base, and means to rotate the cam.
Claim 19
Dependent Claim
166 words
A press tool for forming a louvred corrugated structure from a strip of metal, including a first section comprising die means including a die cavity having a saw-tooth-section portion, the saw-teeth extending on both sides of the median plane of the face of the die cavity, and punch means having a corresponding saw-tooth-section portion to mate with the saw-tooth-section portion of the die cavity, whereby in a single operation the corrugations are formed, and the louvres are completely formed so that they extend from both sides of the strip of metal, said press tool also including a second section comprising co-operating plunger means and second die cavity means in which the louvred corrugated strip is positioned and located, said plunger means and said second die cavity means being relieved to clear the louvres, whereby the plunger means and the second die cavity means engage only with flat portions of the strip to clamp the strip while the corrugations and louvres are formed in said first section.
Claim 20
Dependent Claim
166 words
A press tool for forming a louvred corrugated structure from a strip of metal, including a first section comprising die means including a die cavity having a saw-tooth-section portion, the saw-teeth extending on both sides of the median plane of the face of the die cavity, and punch means having a corresponding saw-tooth-section portion to mate with the saw-tooth-section portion of the die cavity, whereby in a single operation the corrugations are formed, and the louvres are completely formed so that they extend from both sides of the strip of metal, said press tool also including a second section comprising co-operating plunger means and second die cavity means in which the louvred corrugated strip is positioned and located, said plunger means and said second die cavity means being relieved to clear the louvres, whereby the plunger means and the second die cavity means engage only with flat portions of the strip to clamp the strip while the corrugations and louvres are formed in said first section.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |