Abstract: A thermostatic device for selectively opening and closing one of more apertures used for controlling the flow of a coolant fluid includes a housing, at least one fixed element and at least one moveable element. The at least one fixed element is fixedly interconnected to the housing. The at least one moveable is moveably connected to the housing. A fluid path passes through the fixed element and the moveable element. The fluid path is opened and closed in response to movement of the moveable element relative to the fixed element such that when the moveable element is in a first position the fluid path is closed and when the moveable element is in a second position the fluid path is open. A temperature responsive bi-metal element is coupled to the moveable element for moving the moveable element between the first position and the second position.

Abstract: A fluid cooling device for a motor vehicle includes a fluid inlet tank and a fluid outlet tank. A plurality of heat transfer tubes provide constant fluid communication between the inlet tank and the outlet tank. A bypass arrangement selectively provides additional fluid communication between the fluid inlet tank and the fluid outlet tank. A bi-metallic valve is moveable from a first position to a second position in response to an increase in temperature of the fluid such that the valve member closes the at least one bypass tube to preclude additional fluid communication between the fluid inlet tank and the fluid outlet tank when the valve member is in the second position and the valve member opens the bypass tube to provide additional fluid communication between the inlet tank and the outlet tank in the first position.

Abstract: An oil cooler for a motor vehicle includes a fluid inlet tank and a fluid outlet tank. A plurality of heat transfer tubes provides constant fluid communication between the inlet tank and the outlet tank. A bypass arrangement provides additional fluid communication between the fluid inlet tank and the fluid outlet tank under a first operating condition and the bypass arrangement precludes additional fluid communication between the inlet tank and the outlet tank under a second operating condition. The bypass arrangement may include a bypass tube and an element for selectively blocking the bypass tube. The element for selectively blocking the bypass tube may be automatically response to a change in oil temperature or a change in oil pressure.

Abstract: A thermostatic device for selectively opening and closing one of more apertures used for controlling the flow of a coolant fluid includes a housing, at least one fixed element and at least one moveable element. The at least one fixed element is fixedly interconnected to the housing. The at least one moveable is moveably connected to the housing. A fluid path passes through the fixed element and the moveable element. The fluid path is opened and closed in response to movement of the moveable element relative to the fixed element such that when the moveable element is in a first position the fluid path is closed and when the moveable element is in a second position the fluid path is open. A temperature responsive bi-metal element is coupled to the moveable element for moving the moveable element between the first position and the second position.

Abstract: A thermostatic device for selectively opening and closing one of more apertures used for controlling the flow of a coolant fluid includes a housing, at least one fixed element and at least one moveable element. The at least one fixed element is fixedly interconnected to the housing. The at least one moveable is moveably connected to the housing. A fluid path passes through the fixed element and the moveable element. The fluid path is opened and closed in response to movement of the moveable element relative to the fixed element such that when the moveable element is in a first position the fluid path is closed and when the moveable element is in a second position the fluid path is open. A temperature responsive bi-metal element is coupled to the moveable element for moving the moveable element between the first position and the second position.

Abstract: A transmission fluid cooler for cooling the automatic transmission fluid of a motor vehicle equipped with an automatic transmission, and associated method. The transmission fluid cooler can include a fluid inlet tank, a fluid outlet tank, and a plurality of extruded aluminum heat transfer tubes connecting the inlet tank to the outlet tank. Each tube can include first and second substantially flat sidewalls, a plurality of internal webs extending between the first and second sidewalls, and a plurality of dimples and convolutions to cause turbulation and stirring of the transmission fluid in order to increase heat transfer.

Abstract: A magnetic torque transfer device. The magnetic torque transfer device includes an input member and an output member. The input member notably drives at least one input gear. The output member drives at least one output gear. At least one input gear has a first plurality of gear teeth meshingly engaged with a second plurality of gear teeth of at least one output gear. A magneto rheological fluid is disposed between at least some of the meshing first and second pluralities of gear teeth.

Abstract: A thermostatic device for selectively opening and closing one of more apertures used for controlling the flow of a coolant fluid includes a housing, at least one fixed element and at least one moveable element. The at least one fixed element is fixedly interconnected to the housing. The at least one moveable is moveably connected to the housing. A fluid path passes through the fixed element and the moveable element. The fluid path is opened and closed in response to movement of the moveable element relative to the fixed element such that when the moveable element is in a first position the fluid path is closed and when the moveable element is in a second position the fluid path is open. A temperature responsive bi-metal element is coupled to the moveable element for moving the moveable element between the first position and the second position.

Abstract: A powertrain clutch for transferring power from an output shaft of an engine to an input shaft of a manual transmission includes a housing and an electrically controlled clutch between the input shaft and the output shaft for selectively coupling and uncoupling the output shaft and the input shaft. The clutching arrangement further includes a clutch disposed between the input shaft and the output shaft for synchronizing a speed of the input shaft with a speed of the output shaft.

Abstract: An oil cooler for a motor vehicle includes a fluid inlet tank and a fluid outlet tank. A plurality of heat transfer tubes provide constant fluid communication between the inlet tank and the outlet tank. A bypass arrangement selectively provides additional fluid communication between the fluid inlet tank and the fluid outlet. In this regard, the bypass arrangement provides additional fluid communication between the fluid inlet tank and the fluid outlet tank under a first operating condition and the bypass arrangement precludes additional fluid communication between the inlet tank and the outlet tank under a second operating condition. The bypass arrangement may include a bypass tube and means for selectively blocking the bypass tube. The means for selectively blocking the bypass tube may be automatically response to a change in oil temperature or a change in oil pressure.

Abstract: A heat exchanger for cooling a machine fluid of a vehicle, and associated method. The heat exchanger can include a fluid inlet tank, a fluid outlet tank, and a plurality of heat transfer tubes connecting the inlet tank to the outlet tank. Each tube can include first and second substantially flat sidewalls, a plurality of internal webs extending between the first and second sidewalls, and a plurality of first dimples formed on the first sidewall, each first dimple formed over one of the webs.

Abstract: The present invention uses a plurality of extruded tubes 8 to lead the oil from one oil cooler tank to the other oil cooler tank (one tank is the inlet tank of the oil cooler and the other one is the outlet tank of the oil cooler). In one application, the oil cooler tanks are identical. One tank functions as an inlet tank and the other tank functions as an outlet tank. Typically the ends of the tanks are threaded or equipped with some type of connector that allows the connection to the hydraulic lines leading the oil. The complete oil cooler is immersed in the cooling medium (the radiator coolant, typically a mixture of 50% water and 50% glycol). The heat of the oil is transferred through the tube walls to the cooling medium, so that the temperature of the oil leaving the oil cooler is significantly lower than the temperature of the oil flowing into the oil cooler.

Abstract: The invention relates to methods of treating disease based upon pharmaceutical compositions, and processes for the preparation thereof, comprising zidovudine, or a derivative thereof and lamivudine, or a derivative thereof. The pharmaceutical composition is made by a wet granulation process whereby a binder is added to the zidovudine, or a derivative thereof. and lamivudine, or a derivative thereof, during the wet granulation process.

Abstract: A fluid coupling assembly 10 is provided and includes a stationary housing 12, which h forms a first chamber 14; an inner housing or output member 16 which is rotatably disposed within chamber 14 and which forms a second chamber 18; and a rotor or drive member 20, which is rotatably disposed within chamber 18. An amount of fluid is contained within chambers 14 and 18 and is used to transmit torque between the rotor 20 and the inner housing 16. Assembly 10 further includes a pump assembly 24 which is effective to circulate the fluid through assembly 10. An electrical valve 30 is coupled to housing 12 and is effective to selectively control the flow of fluid into chambers 14 and 18. A water jacket 32 within housing 12 is used to cool the fluid flowing through assembly 10. Assembly 10 selectively transmits torque from rotor 20 to housing 16, thereby driving the rotation of a fan assembly 34.

Abstract: A viscous clutch of the magnetorheological fluid type includes an input drive member and an output driven member. A selectively energizable magnetorheological fluid is disposed in a working gap between one cylindrical member on the input member and two cylindrical members on the output shaft. A slip ring configuration on the output member is provided to permit the introduction of electrical energy to a coil assembly disposed on the output member, which coil is energized to establish a magnetic field in the working gap, thereby energizing the magnetorheological fluid. Wiper structures on the input and output members prevent the accumulation and/or centrifugal packing of the iron particles in the magnetorheological fluid adjacent the axial ends of the cylindrical members. A cavity for excess magnetorheological fluid or fluid draining from the working gap is provided between opposed members of the output member.

Abstract: A viscous fluid clutch includes a rotor attached to an output from an engine, a stator attached to a fan assembly and a coil assembly having at least a portion attached to the stator. A first gap is defined between the rotor and the stator and a second gap is defined between the rotor and the coil assembly. The first and second gaps are filled with a magneto rheological (MR) fluid. The coil assembly creates a magnetic field in the first and second gaps to vary the viscosity of the MR fluid to produce a variable speed viscous fluid clutch. The coil assembly includes coil windings which are supplied with power through a slip ring assembly. Both the coil windings and the wiring between the slip ring assembly and the coil windings are isolated from the magneto rheological fluid.

Abstract: A viscous fluid clutch includes a housing which defines a chamber. A fan assembly is attached to the housing. A rotor is rotatably attached to the housing through a bearing. The bearing is disposed entirely within the chamber at a radially inner portion of the chamber. The viscous fluid is located within a radially outer portion of the chamber. The housing and the rotor form a labryinth passage between the outer portion of the chamber and the inner portion of the chamber. This labryinth passage encourages condensation of any oil vapors that may have formed at the shear point of the viscous fluid.

Abstract: A viscous fluid clutch includes a rotor attached to an output from an engine, a stator attached to a fan assembly and a coil assembly having at least a portion attached to the stator. A first gap is defined between the rotor and the stator and a second gap is defined between the rotor and the coil assembly. The first and second gaps are filled with a magneto rheological (MR) fluid. The coil assembly creates a magnetic field in the first and second gaps to vary the viscosity of the MR fluid to produce a variable speed viscous fluid clutch. The coil assembly includes coil windings which are supplied with power through a slip ring assembly. Both the coil windings and the wiring between the slip ring assembly and the coil windings are isolated from the magneto rheological fluid.

Abstract: A viscous fluid clutch includes a rotor attached to an output from an engine, a stator attached to a fan assembly and a coil assembly having at least a portion attached to the stator. A first gap is defined between the rotor and the stator and a second gap is defined between the rotor and the coil assembly. The first and second gaps are filled with a magnetorheological (MR) fluid. The coil assembly creates a magnetic field in the first and second gaps to vary the viscosity of the MR fluid to produce a variable speed viscous fluid clutch.