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8127907 |
Marine transmission using rheological fluids
A marine transmission provides first and second drive gears that have first and second driving surfaces in contact with first and second quantities of rheological fluid. First and second driven...
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8100238 |
Magnetorheological clutch
A magnetorheological clutch includes a primary part, a secondary part and a magnet for the generation of a magnetic field. The primary part and the secondary part are rotatable relative to one...
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8056687 |
Apparatus with active material surface in contact with rheological fluid and method of enhancing performance thereof
An apparatus is provided having an active material forming a surface thereof in contact with a rheological fluid. The active material is controllable to vary a surface geometry thereof between a...
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8016092 |
Magneto-rheological clutch and wheel transmission apparatuses and methods
Magneto-rheological clutch and wheel transmission apparatuses and methods are provided. According to one aspect, a magneto-rheological clutch system can include first and second drive members and...
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7999429 |
Power transmission apparatus
A power transmission apparatus includes a drive roller and a driven roller made of magnetic material, which are rotatable about different axes, and which are provided with a gap therebetween, a...
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7891474 |
Magneto-rheological brake-clutch apparatuses and methods
Magneto-rheological brake-clutch apparatuses and methods are provided. According to one aspect, a magneto-rheological brake-clutch can include a drive member and a driven member spaced from the...
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7870939 |
Magnetorheological clutch
A magnetorheologic clutch includes a stationary part, a rotatable primary part having primary discs, a secondary part having secondary discs, and a chamber containing magnetorheologic fluid formed...
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7828129 |
Magnetorheological clutch having lamination bands
A magnetorheological clutch comprises a stationary part, a rotating primary part with primary laminated strips and a secondary part with secondary laminated strips, whereby a controllable magnetic...
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7690487 |
Vehicle differential including pump with variable engagement clutch
A vehicle differential assembly is provided that includes a differential driven by an input and adapted to allow differing rotational speed between a pair of outputs. The differential includes a...
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7588131 |
Magnetorheological clutch
Disclosed is a magnetorheological clutch comprising a stationary part (1), a rotating primary part (2) with primary lamellae (7), and a coaxially rotating secondary part (3) with secondary lamellae...
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7553132 |
Micro device incorporating programmable element
A micro device is provided that includes a body defining a chamber for receiving fluid. A rotational element is disposed in the chamber for acting on the fluid. The rotational element is rotatable...
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7467697 |
Electromagnetic coupling device for engine accessories
A system and method for controlling a plurality of accessories associated with a multiple cylinder internal combustion engine having the accessories coupled to an engine crankshaft by an...
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7461731 |
Magnetorheologic clutch
A magnetorheological clutch comprises a stationary part (1), of a rotatable primary part (2) with primary lamellae (3) and of a secondary part (8) with secondary lamellae (17) which surrounds the...
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7422093 |
Magneto-rheological coupling
A magneto-rheological coupling (MRC) having an input assembly and an output member. The output member includes a generally cylindrical drum portion and a hub portion extending radially inwardly...
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7364025 |
Magnetorheological fan coupling
A magnetorheological fan coupling (10) having an inverted construction with an input member (18) rotatably mounted to an output member (20). The input member (18) defines a fluid chamber (50) with...
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7334670 |
Torque vectoring differential for controlling vehicle stability
A magnetorheological (MR) fluid coupling for vectoring torque with respect to a shaft capable of rotary motion is disclosed. The coupling includes a stator, a rotor having a rotational degree of...
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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...
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7306083 |
Magnetorheological fluid device
A device employing a magneto rheological (MR) fluid in combination with a stator and a rotor is disclosed, where the stator includes a magnetic field generator. The rotor has a rotational axis and...
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7243768 |
Clutch having a variable viscosity fluid
A clutch (A,B) includes a cam (20,70) and a rotor (22,74), both of which revolve around a common axis (X). The cam has a camming surface (30,72) provided with lobes (32), whereas the rotor carries...
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7216723 |
Pulse torque generator and power tool having the same
A pulse torque generator utilizing a magnetic coupling, and an electric power tool provided with the pulse torque generator. The pulse torque generator includes an input shaft extending in its...
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7137496 |
Parallel field electrode configurations for electrorheological fluid applications
The present invention provides novel configurations for the electrodes in a range of applications for ER fluids. The electrodes are configured so that they generate an electrical field a...
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7083030 |
Torque transfer coupling with magnetorheological clutch actuator
A torque transfer mechanism is provided for controlling the magnitude of a clutch engagement force exerted on a multi-plate clutch assembly that is operably disposed between a first rotary and a...
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7070032 |
Hydrodynamic coupling apparatus
A hydrodynamic coupling apparatus (10) for transmitting torque between driving and driven elements includes an input shaft (14), a first end (16) of which is rotatably supported in a case (12) and...
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6991576 |
Magnetically responsive limited slip differential
A differential assembly includes a case, a gearset having a pair of pinion gears and a pair of side gears, and an electrically operable coupling including a magnetically responsive fluid. The...
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6942081 |
Electrorheological clutch
An electrorheological clutch comprises drive and driven members that selectively engage by the application of a voltage to an electroheological fluid (ER) provided between the driven and driven...
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6932204 |
Power transmission device for a four-wheel drive vehicle
A torque transfer mechanism is provided for controlling the magnitude of a clutch engagement force exerted on a multi-plate clutch assembly that is operably disposed between a first rotary and a...
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6883655 |
Variable torsional damper having magneto-rheological fluid damping in parallel with a spring damper
A variable torsional damper rotatably supported for translating torque between a prime mover and the input of a transmission. The variable torsional damper includes a torque input member...
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6857364 |
Clutch for drive elements of a printing machine
A device for locking, with respect to a first power transmission element, a further power transmission element that is lockable in a rotational position thereof, provides for the first and the...
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6837350 |
Lightweight magnetic particle device
A multiple working surface magnetic particle device for transferring torque between two rotatable members is disclosed. The magnetic particle device includes relatively rotatable members defining a...
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6802283 |
Engine cooling system with variable speed fan
An engine cooling system and method that will allow an engine cooling fan to be driven independently of the engine speed. The engine cooling fan is driven by the engine crankshaft, but includes an...
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6736758 |
Variable torsion converter
A variable torsion converter for use with automobiles and other like vehicles using transmission whereas the present invention uses a magnetic clutch in which a ferromagnetic slurry forms a...
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6732529 |
Off loading clutch for gas turbine engine starting
A method for gas turbine engine off-load starting includes using a starter connected to a rotor of a gas turbine engine to start the gas turbine engine while terminating or reducing torque...
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6725990 |
Torque transfer clutch with magnetorheological actuator and ball screw operator
A transfer clutch includes a magnetorheological actuator which controls operation of a ball screw operator for controlling the magnitude of clutch engagement force exerted on a multi-plate clutch...
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6712730 |
Active torque bias coupling
A torque coupling connects the secondary driving wheels of an automotive vehicle indirectly to the power unit of the vehicle through a variable torque coupling, while the primary driving wheels on...
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6684994 |
Electrostatic devices for mechanical blocking
An electrostatic unit for location of members of mechanical devices includes a housing of the electrostatic location unit, a locating member arranged in the housing and movable from one position to...
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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...
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6634344 |
Controlled engagement of supercharger drive clutch
The present invention provides a control system and method of controlling a supercharger having an input and a pair of rotors. The method comprises providing a magnetic particle clutch having an...
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6623399 |
Traction fluids
Siloxane compositions are useful as traction fluids in traction drive systems which are subject to varied operating temperature and pressure conditions. Specific siloxane compositions included...
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6619453 |
Electromagnetic mechanical particle clutch
A torque transfer device is provided that includes an input member for receiving torque from an external source. An output member is disposed radially inward of the input member to define a first...
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6585092 |
Magnetorheological fluid fan drive design for manufacturability
An improved magnetorheological (MR) fluid fan drive design is disclosed. A critical area in the design of such fan drives is the gap for MR fluid between the rotor ring and the corresponding...
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6581740 |
Multiple disc clutch pack having rheological film layer
A multiple-disc clutch pack. The clutch pack comprises a plurality of porous metal plates mounted concentrically and each having a first and a second surface with at least one of the surfaces...
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6564916 |
Frictional engaging device and frictional engagement control method
A frictional engaging device and frictional engagement control method, wherein the phenomenon of the frictional coefficient of the friction surfaces of a friction engagement device being changed...
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6561949 |
Coupling assembly and a method for accelerating a vehicle and operating a transmission utilizing the coupling assembly
A coupling assembly 10 which selectively causes a primary mass or flywheel 20 be engaged or be coupled to a crankshaft 18 as a transmission gear assembly 23 moves from a first gear position to a...
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6543595 |
Driving force distribution device for vehicle
A driving force distribution device which controls the engagement forces of electromagnetic clutches and which govern the torque distribution between the driving wheels of a vehicle by calculating...
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6527664 |
Locking differential with clutch activated by magnetorheological fluid
A limited slip differential includes a friction clutch mechanism, an electromagnetic coupling, and a camming mechanism disposed between the friction clutch mechanism and the electromagnetic...
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6412618 |
Ball-ramp-actuated friction clutch controlled by a particle-clutch
A particle clutch and a ball-ramp-actuated friction clutch controlled by the particle clutch. The particle clutch includes input and output couplings, the transfer of force therebetween being...
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6394244 |
Magnetic powder clutch
An electromagnetic clutch (110) for an air conditioning compressor includes a generally cylindrical pulley (111) rotatably mounted on a comressor housing (116) and having an annular friction...
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6371267 |
Liquid cooled magnetorheological fluid clutch for automotive transmissions
A magnetorheological fluid clutch has a pair of radially spaced magnetic core members that cooperate with an input rotor to form a pair of working gaps filled with magnetorheological fluid (MRF)....
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6318531 |
Magnetorheological fluid clutch
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...
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6290043 |
Soft start compressor clutch
An electromagnetic clutch (10) for an air conditioning compressor includes a generally cylindrical pulley (11) rotatably mounted on a compressor housing (16) and having an annular friction surface...
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