US4136735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange apparatus including a toroidal-type radiator
Assignee: Case LLC
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Filing: 1976-10-01
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Granted: 1979-01-30
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Expires: 1996-10-01
Abstract
Abstract Heat exchange apparatus including a toroidal-type radiator having radially extending cooling air passage-ways formed through the core thereof, a rotary fan positioned radially inwardly of the radiator core, and fan shroud means shaped and positioned with respect to the radiator core and the blades of the fan whereby the air stream induced by the fan during operation has a major component in a radial direction.
Inventors
- 👤 Harold D. Beck
- 👤 C. Paul Kolthoff, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:23
CPC Classifications
B; B60; B60K; B60K11/00; B60K11/02; B60K11/04; F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/522; F04D29/526; F04D29/54; F04D29/541; F04D29/545; F04D29/547; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/303; Y10S165/304; Y10S165/305; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
268 words
A heat exchange apparatus comprising: a heat exchanger means including a toroidal radiator structure, said toroidal radiator structure including a toroidal radiator core having a plurality of radially extending cooling air passageways formed therethrough, said toroidal radiator structure further including a first radially extending wall and a second radially extending wall axially spaced and substantially parallel with respect to said first wall, said first and second walls substantially defining the axial limits of said toroidal radiator core and an air-receiving plenum chamber disposed radially inwardly of said toroidal radiator core; a rotatable, axial flow fan having a plurality of circumferentially spaced, radially extending impeller blades; and a generally annular fan shroud means supported within an opening formed through said first wall and encircling the fan, said fan shroud means including a generally cylindrical, axially extending throat section, an annular, generally radially extending flat flange section, said flat flange section being spaced radially outwardly and axially in a direction downstream from said throat section and having a radial length substantially equal to the axial length of said cylindrical throat section, said fan shroud means being positioned with respect to said toroidal radiator structure whereby said flat flange section lies substantially in a plane spaced and parallel with respect to said first and second walls, and an annular intermediate section extending between and operatively interconnecting said throat section and said radial flat flange section, said throat section, intermediate section, and radial flat flange section being effective to produce a low pressure region between the air stream flowing over the surface thereof and such surface when the fan is in operation.
Claim 2
Dependent Claim
268 words
A heat exchange apparatus comprising: a heat exchanger means including a toroidal radiator structure, said toroidal radiator structure including a toroidal radiator core having a plurality of radially extending cooling air passageways formed therethrough, said toroidal radiator structure further including a first radially extending wall and a second radially extending wall axially spaced and substantially parallel with respect to said first wall, said first and second walls substantially defining the axial limits of said toroidal radiator core and an air-receiving plenum chamber disposed radially inwardly of said toroidal radiator core; a rotatable, axial flow fan having a plurality of circumferentially spaced, radially extending impeller blades; and a generally annular fan shroud means supported within an opening formed through said first wall and encircling the fan, said fan shroud means including a generally cylindrical, axially extending throat section, an annular, generally radially extending flat flange section, said flat flange section being spaced radially outwardly and axially in a direction downstream from said throat section and having a radial length substantially equal to the axial length of said cylindrical throat section, said fan shroud means being positioned with respect to said toroidal radiator structure whereby said flat flange section lies substantially in a plane spaced and parallel with respect to said first and second walls, and an annular intermediate section extending between and operatively interconnecting said throat section and said radial flat flange section, said throat section, intermediate section, and radial flat flange section being effective to produce a low pressure region between the air stream flowing over the surface thereof and such surface when the fan is in operation.
Claim 3
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 1, wherein said axial flow fan is of the blower type, said fan drawing air generally axially from the exterior of said toroidal radiator structure and discharging the same into said plenum chamber, said fan-generated air stream discharged into said plenum chamber having a major velocity component in a radially outward direction.
Claim 4
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 2, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 5
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 3, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 6
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 1, wherein said axial flow fan is of the suction type, said fan drawing air generally axially from said plenum chamber and discharging the same exteriorly of said toroidal radiator structure, said fan-generated air stream discharged exteriorly of said toroidal radiator structure having a major velocity component in a radially outward direction.
Claim 7
Dependent Claim
31 words
A heat exchange apparatus as set forth in claim 5, wherein said generally radially extending flat flange section of said fan shroud means is disposed exteriorly of said air-receiving plenum chamber.
Claim 8
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 1, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 9
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 7, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 10
Dependent Claim
210 words
A heat exchange apparatus as set forth in claim 1, wherein said impeller blades have an effective axial width, AW, measured along the rotational axis of the fan between a first plane and a second plane, said planes being axially spaced and parallel with respect to each other and disposed substantially normal to the rotational axis of the fan, said first and second planes extending radially, respectively, through a point on the leading edge of each of the impeller blades at the radially outermost, tip region thereof and through a point on the trailing edge of each of the impeller blades at the radially outermost, tip region thereof, the radially outermost, tip region of each of said impeller blades having a radial length of approximately 1/3 of the radial length of the impeller blade, said fan being axially positioned with respect to said fan shroud means whereby one of said first first and second planes is axially spaced from and on either axial side of a radial plane containing a first axial end of said throat section a distance of 0 to 12 percent of AW; and wherein said intermediate section extends between and operatively interconnects a second axial end of said throat section and said radial flat flange section.
Claim 11
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 9, wherein said axial flow fan is of the suction type, said fan drawing air generally axially from said plenum chamber and discharging the same exteriorly of said toroidal radiator structure, said fan-generated air stream discharged exteriorly of said toroidal radiator structure having a major velocity component in a radially outward direction.
Claim 12
Dependent Claim
31 words
A heat exchange apparatus as set forth in claim 10, wherein said generally radially extending flat flange section of said fan shroud means is disposed exteriorly of said air-receiving plenum chamber.
Claim 13
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 9, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 14
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 12, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 15
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 9, wherein said axial flow fan is of the blower type, said fan drawing air generally axially from the exterior of said toroidal radiator structure and discharging the same into said plenum chamber, said fan-generated air stream discharged into said plenum chamber having a major velocity component in a radially outward direction.
Claim 16
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 14, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 17
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 15, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 18
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 14, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 19
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 17, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 20
Dependent Claim
55 words
A heat exchange apparatus as set forth in claim 9, wherein the other one of said first and second planes is axially spaced from and on either axial side of a radial plane containing the juncture of said intermediate section and said radial flat flange section a distance of 0 to 12 percent of AW.
Claim 21
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 19, wherein said axial flow fan is of the blower type, said fan drawing air generally axially from the exterior of said toroidal radiator structure and discharging the same into said plenum chamber, said fan-generated air stream discharged into said plenum chamber having a major velocity component in a radially outward direction.
Claim 22
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 20, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 23
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 21, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 24
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 19, wherein said axial flow fan is of the suction type, said fan drawing air generally axially from said plenum chamber and discharging the same exteriorly of said toroidal radiator structure, said fan-generated air stream discharged exteriorly of said toroidal radiator structure having a major velocity component in a radially outward direction.
Claim 25
Dependent Claim
31 words
A heat exchange apparatus as set forth in claim 23, wherein said generally radially extending flat flange section of said fan shroud means is disposed exteriorly of said air-receiving plenum chamber.
Claim 26
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 19, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 27
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 25, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 28
Dependent Claim
65 words
A heat exchange apparatus as set forth in claim 19, wherein said one of said first and second planes is substantially coincident with said radial plane containing a first axial end of said throat section, and said other one of said first and second planes is substantially coincident with said radial plane containing the juncture of said intermediate section and said radial flat flange section.
Claim 29
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 27, wherein said axial flow fan is of the blower type, said fan drawing air generally axially from the exterior of said toroidal radiator structure and discharging the same into said plenum chamber, said fan-generated air stream discharged into said plenum chamber having a major velocity component in a radially outward direction.
Claim 30
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 27, wherein said axial flow fan is of the suction type, said fan drawing air generally axially from said plenum chamber and discharging the same exteriorly of said toroidal radiator structure, said fan-generated air stream discharged exteriorly of said toroidal radiator structure having a major velocity component in a radially outward direction.
Claim 31
Dependent Claim
31 words
A heat exchange apparatus as set forth in claim 29, wherein said generally radially extending flat flange section of said fan shroud means is disposed exteriorly of said air-receiving plenum chamber.
Claim 32
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 27, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 33
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 31, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 34
Dependent Claim
89 words
A heat exchange apparatus as set forth in claim 27, wherein in said intermediate section is radially curved, and wherein the following relationships exist: RF = AW/3 plus or minus 12 percent of AW, CF = AW/3 plus or minus 12 percent of AW, and R = 2AW/3 plus or minus 12 percent of AW, where RF is is the radial length of the radial flat flange section, CF is the axial length of the cylindrical throat section, and R is the radius of curvature of the intermediate section.
Claim 35
Dependent Claim
61 words
A heat exchange apparatus as set forth in claim 33, wherein said axial flow fan is of the suction type, said fan drawing air generally axially from said plenum chamber and discharging the same exteriorly of said toroidal radiator structure, said fan-generated air stream discharged exteriorly of said toroidal radiator structure having a major velocity component in a radially outward direction.
Claim 36
Dependent Claim
31 words
A heat exchange apparatus as set forth in claim 34, wherein said generally radially extending flat flange section of said fan shroud means is disposed exteriorly of said air-receiving plenum chamber.
Claim 37
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 33, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 38
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 36, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
Claim 39
Dependent Claim
60 words
A heat exchange apparatus as set forth in claim 33, wherein said axial flow fan is of the blower type, said fan drawing air generally axially from the exterior of said toroidal radiator structure and discharging the same into plenum chamber, said fan-generated air stream discharged into said plenum chamber having a major velocity component in a radially outward direction.
Claim 40
Dependent Claim
34 words
A heat exchange apparatus as set forth in claim 38, wherein said throat, intermediate, and radial flat flange sections of said annular fan shroud means are axially spaced intermediate said first and second walls.
Claim 41
Dependent Claim
33 words
A heat exchange apparatus as set forth in claim 39, wherein said annular shroud means further includes an annular shroud section operatively interconnecting and extending between said throat section and said first wall.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |