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| Number | Title | Issue Date |
| 7311185 | Method for thermal management for a controllable viscous fan drive The present invention provides a method of controlling thermal energy within a fan drive. The fan drive includes an input member rotating at an input speed, and an output member attached to the fan and rotating at a fan speed, with a viscous fluid disposed therebetw... | 12/25/2007 |
| 7011198 | Device for regulating rotational speed of the driven rotor of a viscosity coupling Regulating the rotational speed of the driven rotor of a viscosity coupling to a predetermined speed with a control circuit having a switching mechanism. When the speed drops below certain values, the speed is adjusted back to the predetermined value. ... | 03/14/2006 |
| 6942083 | Viscous fan clutch actuated by a heating element and ambient air A fan apparatus is disclosed which includes a fan coupled to a drive mechanism via a viscous clutch. The viscous clutch includes a drive chamber containing a hydraulic fluid with an amount of hydraulic fluid in the drive chamber being related to a torque transmitted... | 09/13/2005 |
| 6648115 | Method for slip power management of a controllable viscous fan drive A method is disclosed for controlling the slip power of a viscous fluid fan drive clutch, especially of a cooling fan drive for an automotive vehicle. Data is prepared correlating slip power generation with clutch input and output speeds for the clutch an... | 11/18/2003 |
| 6408225 | Device and method for balancing the weight on a robot arm The invention relates to a device for balancing the weight carried by a robot arm of a robot. Said device comprises a fluid spring, rotably a pneumatic spring, and a control device for controlling the movements of the robot. The device is characterized by... | 06/18/2002 |
| 6079536 | Rotational speed control arrangement for a fluid friction coupling An arrangement for controlling the rotational speed of an output rotational part of a fluid friction coupling is provided. A fan for cooling components of a motor vehicle is coupled with a driving rotational part by way of a shearing fluid whose effective... | 06/27/2000 |
| 5839558 | Viscous fan clutch with engage port lock A clutch includes an input shaft with a clutch plate engaged with the input shaft to rotate in concert therewith. The clutch plate has an annular disk portion with a clutch plate set of lands and grooves. A housing includes a body supported on the input s... | 11/24/1998 |
| 5799765 | Fluid clutch A fluid clutch comprises a driving disc rotationally driven by a driving section, a rotatable casing enhousing the driving disc, a blower attached to the casing, and an oil supply means for supplying an oil from an outside to a torque transmission gap bet... | 09/01/1998 |
| 5584371 | Viscous fan drive system logic A method of controlling a viscous fluid coupling (15) in which, when the vehicle engine (E) is operating at low speeds, if the speed of rotation (SF) of the fan exceeds a predetermined speed limit (L3), the input signal (29) to the coupling is modified to... | 12/17/1996 |
| 5161659 | Viscous fluid shear clutches and control valves therefor A viscous fluid shear clutch comprises a two-part outer casing 14,15 and an inner clutch member 10 between which is defined a clearance gap into which viscous fluid may flow to provide an adjustable degree of coupling between the casing and the clutch mem... | 11/10/1992 |
| 5109965 | Temperature sensitive hydraulic fan coupling The present invention provides an improvement in the structure of a temperature sensitive hydraulic fan coupling for supplying a suitable amount of cooling air to the automobile engine according to the travelling conditions of the automobile. The conventi... | 05/05/1992 |
| 5090533 | Temperature-sensing type fluid fan coupling device Disclosed is a temperature-sensing type fluid fan coupling device including: a rotary shaft; a sealing enclosure box having a casing and a cover fitted with a cooling fan; a partition plate partitioning the sealing enclosure box into an oil reserving cham... | 02/25/1992 |
| 5042629 | Viscous fluid shear clutches and control valves therefor A viscous fluid shear clutch comprises a two-part outer casing 14,15 and an inner clutch member 10 between which is defined a clearance gap into which viscous fluid may flow to provide an adjustable degree of coupling between the casing and the clutch mem... | 08/27/1991 |
| 5030865 | Self powered remote viscous fluid coupling A viscous clutch (10) is typically employed in a fan drive mechanism within a truck or automobile. A shaft (18), driven by the engine (12), rotates a clutch member (42) within the fan drive. The clutch member is arranged for fluid engagement with a body m... | 07/09/1991 |
| 5025906 | Remote sensing viscous fluid coupling A viscous clutch (10) is typically employed in a fan drive mechanism within a truck or automobile. A shaft (18), driven by the engine (12), rotates a clutch member (42) within the fan drive. The clutch member is arranged for fluid engagement with a body m... | 06/25/1991 |
| 5018612 | Temperature-controlled fan fluid coupling A fan fluid coupling for use with an automotive engine. The coupling comprises a sealed housing, a partition plate that partitions the inside of the housing into an oil reservoir chamber and a torque transmission chamber, a resilient tonguelike valve memb... | 05/28/1991 |
| 4909367 | Automatic thermal and speed controls for viscous fluid clutches A viscous fluid clutch for driving a cooling fan 18 from the crankshaft of an internal combustion engine includes an outer rotary casing 11, 12 connected to the fan and an inner rotary member 10 connected to the crankshaft coupling 9. The clearance gap be... | 03/20/1990 |
| 4874072 | Viscous fan drive control with integrated speed sensor A viscous fan clutch (10) is typically employed in a fan drive mechanism within a truck or automobile. A shaft (18), driven by the engine (12), rotates a clutch member (42) within the fan drive. The clutch member is arranged for fluid engagement with a bo... | 10/17/1989 |
| 4846331 | Valve member of temperature sensitive fluid fan coupling A valve member of a temperature sensitive fluid fan coupling for an engine cooling fan is formed from a plate material having a weight provided at its free end. The modulus of section of the longitudinally central portion of the plate material is reduced ... | 07/11/1989 |
| 4846325 | Friction brake for variable speed viscous fan control A viscous fan clutch (10) is typically employed in a fan drive mechanism within a truck or automobile. A shaft (18), driven by the engine (12), rotates a clutch member (42) within the fan drive. The clutch member is arranged for fluid engagement with a bo... | 07/11/1989 |
| 4828088 | Closed loop pulse modulated viscous fan control A viscous fan clutch (10) is typically employed in a fan drive mechanism within in a truck or or automobile. A shaft (18), driven by the engine (12), rotates a clutch member (42) within the fan drive. The clutch member is arranged for fluid engagement wit... | 05/09/1989 |
| 4650045 | Method and apparatus for controlling the output speed of a fluid friction clutch Disclosed is a method and apparatus for controlling the output speed of a fluid friction clutch. The fluid friction clutch comprises a work chamber, in which a drive disk rotates, and a reservoir. A valve controls the circulation of a viscous medium betwe... | 03/17/1987 |
| 4629046 | Fluid friction clutch Disclosed is a fluid friction clutch controlled as a function of temperature and/or rotation speed, comprising a driving primary member comprising a first reservoir chamber and an overflow orifice, wherein the primary member further comprises a device, re... | 12/16/1986 |
| 4574929 | Viscous fluid coupling A viscous fluid coupling including an input member having a disc-shaped rotor, an output member rotatable with respect to the input member and having a housing encircling the rotor, a partition wall in the housing for dividing the inside of the housing in... | 03/11/1986 |
| 4573559 | Subway electric motor and fan construction An electric motor construction particularly for subway train electric motors which utilize fan induced air cooling to cool the motor windings. The invention exhibits utility in saving power to drive the fan. The fan is coupled to the motor armature by a f... | 03/04/1986 |
| 4570771 | Viscous fluid coupling having centrifugal valve means The viscous fluid coupling is comprised of a drive shaft having a hollow casing rotatably mounted thereon with one end of the drive shaft extending into the hollow casing. The interior of the casing is divided into a reservoir chamber and an operating cha... | 02/18/1986 |
| 4544053 | Temperature-responsive fluid coupling device A temperature-responsive fluid coupling device for driving a cooling fan of an internal combustion engine includes a ball check valve mechanism which is installed in a fluid return passage and a pumping passage, respectively. The valve mechanism comprises... | 10/01/1985 |
| 4441598 | Modulated viscous fan drive A shear fluid, temperature responsive fan drive coupling for the radiator cooling fan of an internal combustion engine. The drive coupling, conventionally, carries a temperature responsive valve which controls the degree of rotary coupling between the eng... | 04/10/1984 |
| 4437554 | Fluid shear coupling apparatus A fluid shear coupling apparatus is disclosed herein which includes a driving member received within a working chamber defined by a driven member. The driven member is mounted with needle bearings to a shaft portion of the driving member to have the membe... | 03/20/1984 |
| 4228880 | Pulse control of an electro magnetically actuated viscous fluid coupling A viscous fluid coupling employing an electro magnet which receives electrical pulses in response to a signal received from a heat sensing device to operate a valve arm to seal and unseal an inlet passage fluidly communicating an operating chamber with a ... | 10/21/1980 |
| 3983980 | Fluid shear-friction coupling A rotating fluid shear friction coupling with at least one shear friction gap formed by a wall rotating along with the input side and by a wall rotating along with the output side, and with two spaces in communication with the working gap, one on the inle... | 10/05/1976 |
| 3943893 | Fluid coupling for an internal combustion engine A coupling assembly for operatively connecting an output shaft of an internal combustion engine to a member associated with the engine such as a cooling fan, in which a rotor is fixed to the output shaft and a first casing is fixed relative to the member ... | 03/16/1976 |
