US3780799A — Heat exchangers and method of making same

Claim 1

Independent Claim 82 words

A heat exchanger comprising a. one-piece cross-fins having 1. slots opening outwardly through the marginal edge portion thereof, and 2. openings, having a closed periphery, disposed in spaced relation to said marginal edge portion, and b. a one-piece coil of tubing 1. having a serpentine form, and 2. comprising a''. passes and b''. return bends interconnecting respective pairs of said passes, c. certain of said passes being disposed in said slots, and d. other of said passes being disposed in said openings.

Claim 2

Dependent Claim 82 words

A heat exchanger comprising a. one-piece cross-fins having 1. slots opening outwardly through the marginal edge portion thereof, and 2. openings, having a closed periphery, disposed in spaced relation to said marginal edge portion, and b. a one-piece coil of tubing 1. having a serpentine form, and 2. comprising a''. passes and b''. return bends interconnecting respective pairs of said passes, c. certain of said passes being disposed in said slots, and d. other of said passes being disposed in said openings.

Claim 3

Dependent Claim 57 words

inserting said other return bend and said two passes through said opening in a direction longitudinally of said two passes, with said return bend passing through said central portion and said two passes passing through respective ones of said end portions, into position wherein said two passes are disposed in respective ones of said end portions, and

Claim 4

Dependent Claim 57 words

inserting said other return bend and said two passes through said opening in a direction longitudinally of said two passes, with said return bend passing through said central portion and said two passes passing through respective ones of said end portions, into position wherein said two passes are disposed in respective ones of said end portions, and

Claim 5

Dependent Claim 9 words

return bends interconnecting respective pairs of said outer passes,

Claim 6

Dependent Claim 9 words

return bends interconnecting respective pairs of said outer passes,

Claim 7

Dependent Claim 59 words

an opening having a closed periphery, disposed in spaced relation to the marginal edge of said assembly, c. inserting said other return bend and said two passes through said opening in a direction longitudinally of said two passes into position wherein said two passes are disposed in said opening, and d. moving said outer pass transversely into said slot.

Claim 8

Dependent Claim 59 words

an opening having a closed periphery, disposed in spaced relation to the marginal edge of said assembly, c. inserting said other return bend and said two passes through said opening in a direction longitudinally of said two passes into position wherein said two passes are disposed in said opening, and d. moving said outer pass transversely into said slot.

Claim 9

Dependent Claim 19 words

a central portion interconnecting said end portions and having a width less than the diameter of said return bends.

Claim 10

Dependent Claim 19 words

a central portion interconnecting said end portions and having a width less than the diameter of said return bends.

Claim 11

Dependent Claim 21 words

openings, having a closed periphery, disposed in spaced relation to said marginal edge portion, and b. a one-piece coil of tubing

Claim 12

Dependent Claim 21 words

openings, having a closed periphery, disposed in spaced relation to said marginal edge portion, and b. a one-piece coil of tubing

Claim 13

Dependent Claim 34 words

comprising a''. passes and b''. return bends interconnecting respective pairs of said passes, c. certain of said passes being disposed in said slots, and d. other of said passes being disposed in said openings.

Claim 14

Dependent Claim 34 words

comprising a''. passes and b''. return bends interconnecting respective pairs of said passes, c. certain of said passes being disposed in said slots, and d. other of said passes being disposed in said openings.

Claim 15

Dependent Claim 40 words

A heat exchanger as defined in claim 1, and in which a. said certain passes are laterally spaced from each other along said marginal edge portion, and b. said other passes are laterally spacEd from each other in said cross-fins.

Claim 16

Dependent Claim 4 words

two other elongated passes,

Claim 17

Dependent Claim 4 words

two other elongated passes,

Claim 18

Dependent Claim 8 words

disposed in uniplanar relation to said respective row.

Claim 19

Dependent Claim 8 words

disposed in uniplanar relation to said respective row.

Claim 20

Dependent Claim 8 words

interconnect passes in adjacent ones of said rows.

Claim 21

Dependent Claim 8 words

interconnect passes in adjacent ones of said rows.

Claim 22

Dependent Claim 45 words

body portions disposed in inwardly spaced relation to said marginal edge portion, b. said body portions have substantially the same inside diameters as the outside diameters of said passes, and c. said entry portions are of lesser width than said diameters of said body portions.

Claim 23

Dependent Claim 45 words

body portions disposed in inwardly spaced relation to said marginal edge portion, b. said body portions have substantially the same inside diameters as the outside diameters of said passes, and c. said entry portions are of lesser width than said diameters of said body portions.

Claim 24

Dependent Claim 19 words

a central portion interconnecting said end portions and having a width less than the diameter of said return bends.

Claim 25

Dependent Claim 19 words

a central portion interconnecting said end portions and having a width less than the diameter of said return bends.

Claim 26

Dependent Claim 14 words

inserting said outside pass transversely through said entry portion into said body portion, and

Claim 27

Dependent Claim 14 words

inserting said outside pass transversely through said entry portion into said body portion, and

Claim 28

Dependent Claim 24 words

openings disposed in spaced relation to the marginal edge of said assembly, b. forming tubing into a one piece coil of serpentine form having

Claim 29

Dependent Claim 24 words

openings disposed in spaced relation to the marginal edge of said assembly, b. forming tubing into a one piece coil of serpentine form having

Claim 30

Dependent Claim 7 words

are permanently of said respective widths thereof.

Claim 31

Dependent Claim 7 words

are permanently of said respective widths thereof.

Claim 32

Dependent Claim 10 words

internal pressure applied by working fluid inside said tubing, and

Claim 33

Dependent Claim 10 words

internal pressure applied by working fluid inside said tubing, and

Claim 34

Dependent Claim 22 words

inserting said thus flattened outer passes transversely through said entry portions into said body portions in the direction of said flattening, and

Claim 35

Dependent Claim 22 words

inserting said thus flattened outer passes transversely through said entry portions into said body portions in the direction of said flattening, and

Claim 36

Dependent Claim 44 words

a body portion extending from said entry portion on the side thereof remote from said marginal edge, and having a greater width perpendicular to the longitudinal center line of said entry portion than the narrowest width of said entry portion, and b. which includes

Claim 37

Dependent Claim 44 words

a body portion extending from said entry portion on the side thereof remote from said marginal edge, and having a greater width perpendicular to the longitudinal center line of said entry portion than the narrowest width of said entry portion, and b. which includes

Claim 38

Dependent Claim 61 words

inserting said other return bends and the respective two other passes interconnected thereto through said opening in a direction longitudinally of said two passes, with said return bends passing through said central portion and said two passes passing through respective ones of said end portions, into position wherein said two passes are disposed in respective ones of said end portions, and

Claim 39

Dependent Claim 61 words

inserting said other return bends and the respective two other passes interconnected thereto through said opening in a direction longitudinally of said two passes, with said return bends passing through said central portion and said two passes passing through respective ones of said end portions, into position wherein said two passes are disposed in respective ones of said end portions, and

Claim 40

Dependent Claim 9 words

internal pressure applied by working fluid inside said tubing.

Claim 41

Dependent Claim 9 words

internal pressure applied by working fluid inside said tubing.

Claim 42

Dependent Claim 22 words

inserting said thus flattened outer passes transversely through said entry portions into said body portions in the direction of said flattening, and

Claim 43

Dependent Claim 22 words

inserting said thus flattened outer passes transversely through said entry portions into said body portions in the direction of said flattening, and

Claim 44

Dependent Claim 44 words

a body portion extending from said entry portion on the side thereof remote from said marginal edge, and having a greater width perpendicular to the longitudinal center line of said entry portion than the narrowest width of said entry portion, and b. which includes

Claim 45

Dependent Claim 44 words

a body portion extending from said entry portion on the side thereof remote from said marginal edge, and having a greater width perpendicular to the longitudinal center line of said entry portion than the narrowest width of said entry portion, and b. which includes

Claim 46

Dependent Claim 19 words

expanding said outer passes in said body portions into abutting engagement with the side walls of said body portions.

Claim 47

Dependent Claim 19 words

expanding said outer passes in said body portions into abutting engagement with the side walls of said body portions.

Claim 48

Dependent Claim 15 words

expanding said other return bend to a diameter not substantially less than said normal diameter.

Claim 49

Dependent Claim 15 words

expanding said other return bend to a diameter not substantially less than said normal diameter.

Claim 50

Dependent Claim 19 words

expanding said outer passes in said body portions into abutting engagement with the side walls of said body portions.

Claim 51

Dependent Claim 19 words

expanding said outer passes in said body portions into abutting engagement with the side walls of said body portions.

Claim 52

Dependent Claim 5 words

expanding said other return bends.

Claim 53

Dependent Claim 5 words

expanding said other return bends.

Claim 54

Dependent Claim 46 words

said return bends are so expanded by internal pressure applied by working fluid inside said tubing, and b. which includes expanding said other passes into abutting engagement with the side walls of said end portions by internal pressure applied by said working fluid inside said tubing.

Claim 55

Dependent Claim 46 words

said return bends are so expanded by internal pressure applied by working fluid inside said tubing, and b. which includes expanding said other passes into abutting engagement with the side walls of said end portions by internal pressure applied by said working fluid inside said tubing.

Claim 56

Dependent Claim 18 words

expanding said outside pass in said body portion to a diameter not substantially less than said normal diameter.

Claim 57

Dependent Claim 18 words

expanding said outside pass in said body portion to a diameter not substantially less than said normal diameter.

Claim 58

Dependent Claim 25 words

a plurality of other elongated passes disposed in laterally spaced relation to each other and extending at an acute angle to said outer passes, and

Claim 59

Dependent Claim 25 words

a plurality of other elongated passes disposed in laterally spaced relation to each other and extending at an acute angle to said outer passes, and

Claim 60

Dependent Claim 14 words

a return bend connecting said outer pass to one of said other passes, and

Claim 61

Dependent Claim 14 words

a return bend connecting said outer pass to one of said other passes, and

Claim 62

Dependent Claim 23 words

A heat exchanger as defined in claim 1, and in which a. said other passes are disposed in not less than one row.

Claim 63

Dependent Claim 41 words

A heat exchanger as defined in claim 1, and in which a. said other passes are disposed in a plurality of rows, and b. said return bends interconnect adjacent ones of said passes, and c. said return bends include return bends

Claim 64

Dependent Claim 13 words

another return bend interconnecting said other passes, b. forming a cross-fin assembly having

Claim 65

Dependent Claim 13 words

another return bend interconnecting said other passes, b. forming a cross-fin assembly having

Claim 66

Dependent Claim 59 words

other return bends interconnecting adjacent ones of said other passes, c. inserting said other return bends and said other passes through said openings, in a longitudinal direction relative to said other passes, into position to dispose said other passes in said openings, d. inserting said outer passes laterally into said slots, and e. securing said coil to said assembly.

Claim 67

Dependent Claim 59 words

other return bends interconnecting adjacent ones of said other passes, c. inserting said other return bends and said other passes through said openings, in a longitudinal direction relative to said other passes, into position to dispose said other passes in said openings, d. inserting said outer passes laterally into said slots, and e. securing said coil to said assembly.

Claim 68

Dependent Claim 45 words

A heat exchanger as defined in claim 1, and in which a. said other passes are disposed in a plurality of rows, and b. said return bends interconnect adjacent ones of said passes, and c. said return bends interconnecting said other passes in said rows

Claim 69

Dependent Claim 62 words

A heat exchanger as defined in claim 1, and in which a. said passes disposed in said slots are disposed in two rows of laterally spaced passes, b. said rows are disposed on opposite sides of said cross-fins, and c. said other passes are disposed in not less than one row of laterally spaced other passes between said two first mentioned rows.

Claim 70

Dependent Claim 29 words

A heat exchanger as defined in claim 6, and in which a. said return bends have substantially the same outside diameter as said passes, and b. said openings have

Claim 71

Dependent Claim 15 words

A heat exchanger as defined in claim 1, and in which a. said slots embody

Claim 72

Dependent Claim 29 words

A heat exchanger as defined in claim 8, and in which a. said return bends have substantially the same outside diameter as said passes, and b. said openings have

Claim 73

Dependent Claim 19 words

A heat exchanger as defined in claim 9, and in which a. said entry portions and said central portions

Claim 74

Independent Claim 17 words

The method of making a heat exchanger comprising a. forming a one piece coil of tubing having

Claim 75

Independent Claim 17 words

The method of making a heat exchanger comprising a. forming a one piece coil of tubing having

Claim 76

Dependent Claim 16 words

The method of making a heat exchanger as defined in claim 11, and a. in which

Claim 77

Dependent Claim 16 words

The method of making a heat exchanger as defined in claim 11, and a. in which

Claim 78

Independent Claim 14 words

The method of making a heat exchanger comprising a. forming a cross-fin assembly having

Claim 79

Independent Claim 14 words

The method of making a heat exchanger comprising a. forming a cross-fin assembly having

Claim 80

Dependent Claim 16 words

The method of making a heat exchanger as defined in claim 14, and a. in which

Claim 81

Dependent Claim 29 words

The method of making a heat exchanger as defined in claim 15, and in which a. said expanding of said outer passes is accomplished by the simultaneous application of

Claim 82

Dependent Claim 16 words

The method of making a heat exchanger as defined in claim 14, and a. in which

Claim 83

Dependent Claim 16 words

The method of making a heat exchanger as defined in claim 17, and a. in which

Claim 84

Dependent Claim 29 words

The method of making a heat exchanger as defined in claim 18, and a. in which said expanding of said outer passes is accomplished by the simultaneous application of

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-12-24	1977-06-25	1977-12-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-12-24	1981-06-25	1981-12-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-12-24	1985-06-25	1985-12-25	$7700.00	Window Closed / Lapsed

Heat exchangers and method of making same

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