CA1052650A - Fluid drive coupling control device for engine cooler fan - Google Patents
Fluid drive coupling control device for engine cooler fanInfo
- Publication number
- CA1052650A CA1052650A CA243,941A CA243941A CA1052650A CA 1052650 A CA1052650 A CA 1052650A CA 243941 A CA243941 A CA 243941A CA 1052650 A CA1052650 A CA 1052650A
- Authority
- CA
- Canada
- Prior art keywords
- bimetal member
- bimetal
- control mechanism
- engine
- spring means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 20
- 230000008878 coupling Effects 0.000 title claims abstract description 15
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 230000004913 activation Effects 0.000 claims 1
- 238000001994 activation Methods 0.000 claims 1
- 230000009849 deactivation Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 6
- 238000005192 partition Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/042—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using fluid couplings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D35/00—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
- F16D35/02—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part
- F16D35/021—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves
- F16D35/022—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves the valve being actuated by a bimetallic strip
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Temperature-Responsive Valves (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
In a drive fluid coupling for cooler fan blades of an engine of vehicles, such as automobiles or the like including a mounting base disposed on front face of a casing closure, a cup-shaped, snap spring-like, instantaneously heat-responsive bimetal member an apex centering, reversally deformable concavo-convex section mounted by engagement of its peripheral edge in an annular groove formed in the mounting case, and an actuating rod extending from the apex portion of the bimetal member to actuate a fluid clutch at the distal end.
A control mechanism of the heat-responsive bimetal member comprises a spring disposed to apply an urging force on a rear surface of the heat-responsive bimetal member.
In a drive fluid coupling for cooler fan blades of an engine of vehicles, such as automobiles or the like including a mounting base disposed on front face of a casing closure, a cup-shaped, snap spring-like, instantaneously heat-responsive bimetal member an apex centering, reversally deformable concavo-convex section mounted by engagement of its peripheral edge in an annular groove formed in the mounting case, and an actuating rod extending from the apex portion of the bimetal member to actuate a fluid clutch at the distal end.
A control mechanism of the heat-responsive bimetal member comprises a spring disposed to apply an urging force on a rear surface of the heat-responsive bimetal member.
Description
105'~650 The present invention relates to a control mechanism having spring means and an instantaneously heat-responsive birnetal member used in a drive fluid coupling for cooler fan blades of a vehicle engine, such as an automobile or the like.
Japanese patent No. 47214/74 discloses a drive fluid coupling, for the cooler fan blades of an engine of a vehicle such as an automobile or the like having an attachment base dis-posed on the front face of a casing closure, which is provided with a cup-shaped, snap spring-like heat-responsive bimetal member of an apex centering, deformable concave-convex section attached in engagement of its peripheral edge in an annular groove formed in the attachment base, and with an actuating rod extending from the apex portion of the bimetal member thereby to actuate a fluid clutch at the distal end.
~owever, the conventional bimetal member for a coupling of the class described above has the disadvantage that operative temperatures in response to which it is inversely deformed and restored cannot be approximated to a determined degree because the responsive operation is performed only by the bimetal.
An object of this invention is, therefore, to provide a control mechanism of a bimetal member for a coupling of the class referred to herein for approximating to a determined degree operative temperatures in response to which it is inversely deformed and restored.
Another object of this invention is to provide a con-trol mechanism of a bimetal member for a coupling of the class ~- enabling the operative temperatures to be adjusted cor-respondingly to the characteristic of the bimetal.
According to this invention, generally,a spring or springs are coupled with the heat-responsive bimetal member thereby to preliminarily apply to the bimetal member an urging force tending to approximate operative temperatures to which the , -- 1 --'~
1~5'~650 bimetal member is inversely deformed and restored in response.
In accordance with the above objects, the invention more specifically relates to a control mechanism for a fluid clul:ch coupling a cooler fan with an engine, this mechanism com-prising: a mounting base and a cup-shaped snap-deformable heat-responsive bimetal member having a central apex portion and a concave-convex section. This bimetal member is mounted by engagement of its peripheral edge in an annular groove formed in the mounting base. An actuating rod extends from the apex portion of the bimetal member and is adapted to actuate the fluid clutch.
There is also provided a coil spring which is disposed to apply an urging force on the central apex portion of the bimetal member to minimize the difference between a temperature at which the bimetal member snap deforms to couple the engine and fan, and a temperature at which the bimetal member snap deforms to decouple the engine and fan.
In a preferred embodiment of the invention, the spring engages the concave section of the bimetal member. In another embodiment, it engages the convex section.
Embodiments of the invention will now be described with reference to the appended drawings wherein:
Fig. 1 shows a longitudinal section of one embodiment of the invention;
Fig. 2 diagrammatically shows characteristics of one embodlment of the invention;
~;~ Fig. 3, second sheet of drawings, shows a plane view of the bimetal incorporated in embodiments of the invention;
Fig. 4, second sheet of drawings, shows a cross-section taken along line I-I;
Fig. 5, first sheet of drawings, shows a longitudinal section of another embodiment of the invention;
Figure 6, first sheet of drawings, diagrammatically ~ .... .. .
105'~650 shows characteristics of the other embodiment of the invention;
Fig. 7 shows a longitudinal section of still other embodiment of the invention;
Fig. 8 diagrammatically shows characteristics of the still other embodiment of the invention; and Fig. 9 diagrammatically shows characteristics of the conventional device.
A heat-responsive bimetal member 4 is connected at a front and a rear center surface 82 and 81 with an actuating rod 7 of a fluid clutch mechanism a so that the bimetal member can be inversely deformed and restored in a bilateral side of the axis of the rod 7. The bimetal member 4 is thus secured at the rear end rigidly with a valve member 13 disposed in a fluid accumulator chamber 12 thereby to operatively open and close an outlet 11 formed in a partition plate 10 in response to variation of environmental temperatures of an engine, and is engaged at a peripheral edge 5 in an annular groove 3 of an attachment base protruding on the front surface of a casing closure 1 of a fluid coupling.
The attachment base 2 is provided with more than one aeration opening. The partition plate 10 interposed between ` the casing closure 1 and a casing 16 has an inlet 15 formed therein in a peripheral position and constituting in combination with a finger-like protrusion 17 rigid with the casing closure 1 for allowing a fluid amount staying in a peripheral end of a torque transmission chamber 18 under centrifugation to flow into - the fluid accumulator chamber 12.
A drive shaft 21 is supported through bearing 20 on the casing 16 and has at an innder end a drive disc 19 spaced from an inner surface of the partition plate 10 and the casing .~ .
~s 105Z~S0 16 to define ~ torque transmission spacing 221, 222. The drive sha~t 21 is provided at an outer end with a flange 23 ha~ing a suited number o~ apertures 24, 24 ...... formed therein to receive bolt stems for locking a pulley not shown thereto.
The drive disc 19 has a stepped peripheral groove 25 formed in the periphery and passa~es 2~, 26 O~.O~ extending across the torque transmission spacings 222.
The casing 16 is provided at the rear por-tion with coller fan vanes 27, 27 ~OO.~ secured with bolt apertures 28~ 2~ ...... .
Either bo-th or one of coil springs 91 and 92 are disposed on the side of the rear or the front surface 81 or 82 or the both surfaces of the bimetal member in the manner that one of coil springs is compressed, while another coil spring is not compressed, to exert an urging force on either of the rear or the front surface of the bi~etal member, or otherwise that only one of the rear and the front surface of the bimetal member is applied with an urging force.
Reference number 29 in ~ig. 5 designates a pivot joint of the valve member 130 ; ~igure 2 shows a diagram in which ~1 is a curve representing characteristics of one embodiment of this invention ; in texms of function of environmental temperature o an engine to rotation of the cooler fan, and R2 is a curve representing in the same manner characteristics of a conventional mechanism solel~y of bimetal. T1 and Tll shows thus range of operative temperature.
The heat-responsive bimetal membex 4 is distorted, as an environmental temperature of an engine rises, to cause the valve member 13 to open the outlet 11 through whicih a fluid accumulated in the fluid accumulator chamber 12 by ` :.
105~50 interminal inflow throu~h the da~med inlet 15 is allowed to flow into the torque transmission spacings 221~ 222 in the torque transmission chamber there~y to increase a relative rotational velocity of cooler fan blades 28 vJith that of the drive shaft. ~n inward distortion of the bimetal member 4 permits the valve member to closc the outlet 1 1, at a low environmental temperature of an engine, thereby to reduce flow rate of the fluid into the torque transmission spacings 221, 222, resulting in rcduction of a relative velocity of the cooler fan blades.
The bimetal member 4 is distorted at a desired, predetermined temperature in an inward or an outward direction which is instantaneously determined by its cup-like configuration, to actuate valve member l3 to open or close the outlet ll.
Some amplitude of difference is observed to exist between the temperatures of inverse deformation and restoration of the bimetal 14~ when it is solely fitted on the actuating rod 7. A warmed water test showed that the temperature difference was approximately 13C as to a bimetal of dia~eter of 28 mm and thickness of 0.2 mm. It is apparent that a bimetal of this dimension when directed to con+rol of a fluid coupling for cooler fan will often present a temperature difference in the order of 20C to 30C due to a low heat conductivity of an environmental air and a thermal influence of the coupling case.
In this invention, the cup-like bimetal member is coupled with coil spring 91 or 92 or springs 91 and 92 as shown in ~igs. 1,5, and 7, respectively~ to add an urging force to that of the curved bimetal~ so that operative temperatures responsive to which the bimetal member is inversely deformed and restored can be approximated to a determined degree for control of the fluid coupling by selective adjustement of an , ~ 0 5'~ S O
initial compression of the spring or sprin~s. ~he operative temperatures of the inversc deformation and restoration of the bimetal member can be thus adjusted to any degrec suited to the purpose of applications, and design of the control is facilitated to obtain any desired characteristics. ~he bimetal control can thus perform an instantaneous responsive operation to variation of an environmental temperature of an engine in a more efficient manner.
., .
_ 6 -
Japanese patent No. 47214/74 discloses a drive fluid coupling, for the cooler fan blades of an engine of a vehicle such as an automobile or the like having an attachment base dis-posed on the front face of a casing closure, which is provided with a cup-shaped, snap spring-like heat-responsive bimetal member of an apex centering, deformable concave-convex section attached in engagement of its peripheral edge in an annular groove formed in the attachment base, and with an actuating rod extending from the apex portion of the bimetal member thereby to actuate a fluid clutch at the distal end.
~owever, the conventional bimetal member for a coupling of the class described above has the disadvantage that operative temperatures in response to which it is inversely deformed and restored cannot be approximated to a determined degree because the responsive operation is performed only by the bimetal.
An object of this invention is, therefore, to provide a control mechanism of a bimetal member for a coupling of the class referred to herein for approximating to a determined degree operative temperatures in response to which it is inversely deformed and restored.
Another object of this invention is to provide a con-trol mechanism of a bimetal member for a coupling of the class ~- enabling the operative temperatures to be adjusted cor-respondingly to the characteristic of the bimetal.
According to this invention, generally,a spring or springs are coupled with the heat-responsive bimetal member thereby to preliminarily apply to the bimetal member an urging force tending to approximate operative temperatures to which the , -- 1 --'~
1~5'~650 bimetal member is inversely deformed and restored in response.
In accordance with the above objects, the invention more specifically relates to a control mechanism for a fluid clul:ch coupling a cooler fan with an engine, this mechanism com-prising: a mounting base and a cup-shaped snap-deformable heat-responsive bimetal member having a central apex portion and a concave-convex section. This bimetal member is mounted by engagement of its peripheral edge in an annular groove formed in the mounting base. An actuating rod extends from the apex portion of the bimetal member and is adapted to actuate the fluid clutch.
There is also provided a coil spring which is disposed to apply an urging force on the central apex portion of the bimetal member to minimize the difference between a temperature at which the bimetal member snap deforms to couple the engine and fan, and a temperature at which the bimetal member snap deforms to decouple the engine and fan.
In a preferred embodiment of the invention, the spring engages the concave section of the bimetal member. In another embodiment, it engages the convex section.
Embodiments of the invention will now be described with reference to the appended drawings wherein:
Fig. 1 shows a longitudinal section of one embodiment of the invention;
Fig. 2 diagrammatically shows characteristics of one embodlment of the invention;
~;~ Fig. 3, second sheet of drawings, shows a plane view of the bimetal incorporated in embodiments of the invention;
Fig. 4, second sheet of drawings, shows a cross-section taken along line I-I;
Fig. 5, first sheet of drawings, shows a longitudinal section of another embodiment of the invention;
Figure 6, first sheet of drawings, diagrammatically ~ .... .. .
105'~650 shows characteristics of the other embodiment of the invention;
Fig. 7 shows a longitudinal section of still other embodiment of the invention;
Fig. 8 diagrammatically shows characteristics of the still other embodiment of the invention; and Fig. 9 diagrammatically shows characteristics of the conventional device.
A heat-responsive bimetal member 4 is connected at a front and a rear center surface 82 and 81 with an actuating rod 7 of a fluid clutch mechanism a so that the bimetal member can be inversely deformed and restored in a bilateral side of the axis of the rod 7. The bimetal member 4 is thus secured at the rear end rigidly with a valve member 13 disposed in a fluid accumulator chamber 12 thereby to operatively open and close an outlet 11 formed in a partition plate 10 in response to variation of environmental temperatures of an engine, and is engaged at a peripheral edge 5 in an annular groove 3 of an attachment base protruding on the front surface of a casing closure 1 of a fluid coupling.
The attachment base 2 is provided with more than one aeration opening. The partition plate 10 interposed between ` the casing closure 1 and a casing 16 has an inlet 15 formed therein in a peripheral position and constituting in combination with a finger-like protrusion 17 rigid with the casing closure 1 for allowing a fluid amount staying in a peripheral end of a torque transmission chamber 18 under centrifugation to flow into - the fluid accumulator chamber 12.
A drive shaft 21 is supported through bearing 20 on the casing 16 and has at an innder end a drive disc 19 spaced from an inner surface of the partition plate 10 and the casing .~ .
~s 105Z~S0 16 to define ~ torque transmission spacing 221, 222. The drive sha~t 21 is provided at an outer end with a flange 23 ha~ing a suited number o~ apertures 24, 24 ...... formed therein to receive bolt stems for locking a pulley not shown thereto.
The drive disc 19 has a stepped peripheral groove 25 formed in the periphery and passa~es 2~, 26 O~.O~ extending across the torque transmission spacings 222.
The casing 16 is provided at the rear por-tion with coller fan vanes 27, 27 ~OO.~ secured with bolt apertures 28~ 2~ ...... .
Either bo-th or one of coil springs 91 and 92 are disposed on the side of the rear or the front surface 81 or 82 or the both surfaces of the bimetal member in the manner that one of coil springs is compressed, while another coil spring is not compressed, to exert an urging force on either of the rear or the front surface of the bi~etal member, or otherwise that only one of the rear and the front surface of the bimetal member is applied with an urging force.
Reference number 29 in ~ig. 5 designates a pivot joint of the valve member 130 ; ~igure 2 shows a diagram in which ~1 is a curve representing characteristics of one embodiment of this invention ; in texms of function of environmental temperature o an engine to rotation of the cooler fan, and R2 is a curve representing in the same manner characteristics of a conventional mechanism solel~y of bimetal. T1 and Tll shows thus range of operative temperature.
The heat-responsive bimetal membex 4 is distorted, as an environmental temperature of an engine rises, to cause the valve member 13 to open the outlet 11 through whicih a fluid accumulated in the fluid accumulator chamber 12 by ` :.
105~50 interminal inflow throu~h the da~med inlet 15 is allowed to flow into the torque transmission spacings 221~ 222 in the torque transmission chamber there~y to increase a relative rotational velocity of cooler fan blades 28 vJith that of the drive shaft. ~n inward distortion of the bimetal member 4 permits the valve member to closc the outlet 1 1, at a low environmental temperature of an engine, thereby to reduce flow rate of the fluid into the torque transmission spacings 221, 222, resulting in rcduction of a relative velocity of the cooler fan blades.
The bimetal member 4 is distorted at a desired, predetermined temperature in an inward or an outward direction which is instantaneously determined by its cup-like configuration, to actuate valve member l3 to open or close the outlet ll.
Some amplitude of difference is observed to exist between the temperatures of inverse deformation and restoration of the bimetal 14~ when it is solely fitted on the actuating rod 7. A warmed water test showed that the temperature difference was approximately 13C as to a bimetal of dia~eter of 28 mm and thickness of 0.2 mm. It is apparent that a bimetal of this dimension when directed to con+rol of a fluid coupling for cooler fan will often present a temperature difference in the order of 20C to 30C due to a low heat conductivity of an environmental air and a thermal influence of the coupling case.
In this invention, the cup-like bimetal member is coupled with coil spring 91 or 92 or springs 91 and 92 as shown in ~igs. 1,5, and 7, respectively~ to add an urging force to that of the curved bimetal~ so that operative temperatures responsive to which the bimetal member is inversely deformed and restored can be approximated to a determined degree for control of the fluid coupling by selective adjustement of an , ~ 0 5'~ S O
initial compression of the spring or sprin~s. ~he operative temperatures of the inversc deformation and restoration of the bimetal member can be thus adjusted to any degrec suited to the purpose of applications, and design of the control is facilitated to obtain any desired characteristics. ~he bimetal control can thus perform an instantaneous responsive operation to variation of an environmental temperature of an engine in a more efficient manner.
., .
_ 6 -
Claims (5)
1. A control mechanism for a fluid clutch coupling a cooler fan with an engine comprising: a mounting base; a cup-shaped, snap-deformable, heat-responsive bimetal member with a central apex portion and a concave-convex section, which member is mounted by engagement of its peripheral edge in an annular groove formed in the mounting base; an actuating rod extending from the apex portion of the bimetal member adapted to actuate the fluid clutch and a spring means disposed to apply an urging force on said central apex portion of the bimetal member to minimize the difference between a temperature at which the bimetal member snap deforms to couple the engine and fan, and a temperature at which the bimetal member snap deforms to decouple the engine and fan.
2. The control mechanism of claim 1 wherein said spring means engages the concave section of the bimetal member.
3. The control mechanism of claim 1 wherein said spring means engages the convex section of the bimetal member.
4. The control mechanism of claim 1, wherein said spring means comprises:
a first coil spring engaging one surface of the bimetal member to bias the bimetal member to induce activa-tion of the coupling; and a second coil spring engaging another surface of the bimetal member to bias the bimetal member to induce deactivation of the coupling.
a first coil spring engaging one surface of the bimetal member to bias the bimetal member to induce activa-tion of the coupling; and a second coil spring engaging another surface of the bimetal member to bias the bimetal member to induce deactivation of the coupling.
5. The control mechanism of claim 1, wherein said spring means comprises:
a first coil spring engaging the concave principal surface of the cup-shaped bimetallic member; and a second coil spring engaging the convex principal surface of the cup-shaped bimetallic member, said first and second coil springs exerting opposing forces on the bimetallic member.
a first coil spring engaging the concave principal surface of the cup-shaped bimetallic member; and a second coil spring engaging the convex principal surface of the cup-shaped bimetallic member, said first and second coil springs exerting opposing forces on the bimetallic member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1188275A JPS5187664A (en) | 1975-01-30 | 1975-01-30 | SHUNKANODOTAIBAIMETARUOMOCHIITA JIDOSHATONOSOKOSHAYONAINENKIKANNO REIKYAKUFUANBUREEDONOKUDOYORYUTAIKATSUPURINGUNIOKERUNETSUODOTAIBAIMETARUNO ODOSAYOSEIGYOKIKO |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1052650A true CA1052650A (en) | 1979-04-17 |
Family
ID=11790087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA243,941A Expired CA1052650A (en) | 1975-01-30 | 1976-01-19 | Fluid drive coupling control device for engine cooler fan |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5187664A (en) |
| CA (1) | CA1052650A (en) |
| FR (1) | FR2299507A1 (en) |
| GB (1) | GB1509351A (en) |
| IT (1) | IT1055805B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5634178Y2 (en) * | 1977-07-13 | 1981-08-13 | ||
| CN101463750B (en) * | 2007-12-19 | 2012-06-13 | 华纳圣龙（宁波）有限公司 | Silicone oil fan clutch |
| US9267390B2 (en) | 2012-03-22 | 2016-02-23 | Honeywell International Inc. | Bi-metallic actuator for selectively controlling air flow between plena in a gas turbine engine |
| CN107630743A (en) * | 2017-10-30 | 2018-01-26 | 山东五龙汽车零部件有限公司 | A kind of constant temperature temperature-controlled fan clutch |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2877751A (en) * | 1957-02-06 | 1959-03-17 | Evelyn Dew | Thermostatically controlled cooling systems for internal combustion engines |
| DE1268432B (en) * | 1962-06-20 | 1968-05-16 | Gerd W Seifert Dipl Ing Dr Ing | Cooling air blower for internal combustion engines, especially for motor vehicles |
| FR2046088A5 (en) * | 1969-07-01 | 1971-03-05 | Usui Kokusai Sangyo Kk | |
| DE2044382A1 (en) * | 1970-09-08 | 1972-03-16 | Dr.-Ing. H.C. F. Porsche Kg, 7000 Stuttgart-Zuffenhausen | Control device for the cooling air fan of internal combustion engines |
-
1975
- 1975-01-30 JP JP1188275A patent/JPS5187664A/en active Granted
-
1976
- 1976-01-15 GB GB165376A patent/GB1509351A/en not_active Expired
- 1976-01-16 IT IT6709576A patent/IT1055805B/en active
- 1976-01-19 CA CA243,941A patent/CA1052650A/en not_active Expired
- 1976-01-29 FR FR7602463A patent/FR2299507A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2299507B1 (en) | 1980-01-11 |
| IT1055805B (en) | 1982-01-11 |
| AU1012676A (en) | 1977-07-14 |
| JPS5187664A (en) | 1976-07-31 |
| FR2299507A1 (en) | 1976-08-27 |
| DE2602660B2 (en) | 1977-04-07 |
| GB1509351A (en) | 1978-05-04 |
| DE2602660A1 (en) | 1976-08-05 |
| JPS5444065B2 (en) | 1979-12-24 |
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