Patent application number | Description | Published |
20080236974 | Hydrodynamic clutch device - A hydrodynamic clutch includes a hydrodynamic circuit formed by at least a pump wheel and a turbine wheel in a clutch housing with a drive-side housing wall extending to the axis of rotation, and a bridging clutch with a piston capable of shifting axially relative to the drive-side housing wall. The turbine wheel is connected to a hub, which is connected for rotation in common to a takeoff, and is axially supported between the hydrodynamic circuit and the clutch housing, and has first and second flow passages which are axially offset from each other. The hub has a drive-side end with an axial bearing area which can be moved into axial contact with an axial bearing, which is either an axial contact surface on the drive-side housing wall or is assigned to the drive-side housing wall. | 10-02-2008 |
20080236975 | Hydrodynamic clutch device - A hydrodynamic clutch includes a hydrodynamic circuit formed by at least a pump wheel and a turbine wheel in a clutch housing with a drive-side housing wall extending to the axis of rotation, and a bridging clutch with a piston capable of shifting axially relative to the drive-side housing wall. The turbine wheel is connected to a hub, which is connected for rotation in common to a takeoff, and is axially supported between the hydrodynamic circuit and a flow guide element, which is supported between the hub and the drive-side housing wall, and has first and second flow passages which are axially offset from each other. The flow guide element has a drive-side end with an axial bearing area which can be moved into axial contact with an axial bearing, which is either an axial contact surface on the drive-side housing wall or is assigned to the drive-side housing wall. | 10-02-2008 |
20110240429 | Hydrodynamic Coupling Arrangement, In Particular A Torque Converter - A hydrodynamic coupling includes a housing coupled to a driveshaft having an impeller and a turbine wheel is arranged in the housing driven by the impeller, and a first damper arrangement by which the housing is coupled to a driven member by a lockup clutch. The first damper arrangement includes a first torsional vibration damper connected to the lockup clutch is rotatable around an axis of rotation against the action of a first damper spring arrangement. A second torsional vibration damper is connected to the first torsional vibration damper and rotatable around the axis of rotation against the action of a second damper spring arrangement. The turbine wheel is connected to an intermediate torsional vibration damper region including a first secondary side, a second primary side, a second damper arrangement having a deflection mass carrier connected to the second secondary side that is carried at the deflection mass carrier such that a radial position of the deflection mass. | 10-06-2011 |
Patent application number | Description | Published |
20080202750 | PROPPANT MATERIALS AND METHODS - The present invention provides thermoplastic coated proppants and methods for preparing the thermoplastic coated proppants. Methods for using these proppants in subterranean well formations and hydraulic fracturing operations, for example, are also disclosed. | 08-28-2008 |
20080277115 | INCREASING BUOYANCY OF WELL TREATING MATERIALS - A composite proppant having an increased buoyancy comprising a proppant substrate such as a porous ceramic or a silica sand coated with a material of a lesser actual density than the apparent density of the proppant substrate to increase the buoyancy of the composite proppant. | 11-13-2008 |
20080280787 | PHENOL-FORMALDEHYDE NOVOLAC RESIN HAVING LOW CONCENTRATION OF FREE PHENOL - A phenol-formaldehyde novolac resin having a low concentration of free phenol prepared by distilling residual phenol from a molten novolac resin and replacing at least a portion of the phenol with a solvent having a volatility equal to or less than phenol. Such modified novolac resins are suitable for the production of resin coated molding sands for shell molding and sand cores, as well as for the production of resin coated proppants for use in oil and gas recovery operations. | 11-13-2008 |
20080283243 | Reducing flow-back in well treating materials - A composite proppant having a proppant substrate such as a porous ceramic or silica sand coated with magnetic particles and a method of propping a subterranean formation using a composition consisting essentially of the composite proppant. | 11-20-2008 |
20080286472 | REDUCING FORMALDEHYDE EMISSIONS - A method for reducing formaldehyde emissions from articles prepared from, or which otherwise comprise formaldehyde-emitting compositions, such as formaldehyde-containing resins, and relates especially to a method for reducing formaldehyde emissions from products such as cellulose laminates, permanent press (wrinkle-free) textiles, floral foams and ceiling or acoustical tiles, which involves isolating the article in an enclosed space a formaldehyde scavenger, particularly a formaldehyde scavenger carried by a substrate. | 11-20-2008 |
20120295114 | Phenol-Formaldehyde Novolac Resin Having Low Concentration of Free Phenol - A phenol-formaldehyde novolac resin having a low concentration of free phenol prepared by distilling residual phenol from a molten novolac resin and replacing at least a portion of the phenol with a solvent having a volatility equal to or less than phenol. Such modified novolac resins are suitable for the production of resin coated molding sands for shell molding and sand cores, as well as for the production of resin coated proppants for use in oil and gas recovery operations. | 11-22-2012 |