Patents by Inventor Jens Schafer
Jens Schafer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20160333749Abstract: A method for operating a camshaft adjuster, which includes an adjusting transmission with an input shaft, an output shaft connected in a non-rotatable manner with a camshaft, and an adjusting shaft, whereby the adjusting shaft is driven by an actuator, characterized by the fact that the actuator drives the adjusting shaft by overcoming a torque that is dependent on its angular position.Type: ApplicationFiled: December 9, 2014Publication date: November 17, 2016Inventors: Mike Kohrs, Jens Schäfer, Marco Hildebrand
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Patent number: 9484118Abstract: A nuclear fuel assembly for a boiling water reactor is provided. The nuclear fuel assembly includes a base, a head and a bundle of full length fuel rods and partial length fuel rods. The bundle extends longitudinally between the base and the head, at least one partial length fuel rod having a lower end received in a housing provided in the base and delimited by a closed bottom larger than the lower end. The housing is further delimited by a peripheral wall surrounding the lower end and the partial length fuel rod rests freely on the bottom.Type: GrantFiled: September 28, 2010Date of Patent: November 1, 2016Assignee: AREVA NPInventors: Jens Schäfer, Juris Kronenberg
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Patent number: 9297283Abstract: Camshaft unit (1) having a first camshaft (2), which is phase-adjustable with respect to a crankshaft, a second camshaft (3), which is disposed concentric to the first camshaft (2) and is always in phase with the crankshaft, a camshaft adjuster (5) with which the first camshaft (2) is phase-adjustable with respect to the crankshaft, a connecting member (4), which is displaceable in the axial direction of the camshafts (2, 3) and has first toothed section (16) that meshes with counter-toothed section (6) on the first camshaft (2), and an adjusting drive (9) by which a connecting member (4) can be displaced axially, wherein through an axial advance, a relative rotation of the first camshaft (2) with respect to the connecting member (4) takes place.Type: GrantFiled: May 16, 2013Date of Patent: March 29, 2016Assignee: Schaeffler Technologies AG & Co. KGInventors: Jens Schafer, Sebastian Zwahr
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Publication number: 20160053640Abstract: A camshaft adjuster (4) with a stator (20) that has an outer part (50) for concentrically holding a rotor (22) with vanes (34) arranged around the rotor (22) and a segment (52) projecting from the outer part (50) for engaging between two vanes (34) of the rotor (22), in order to form, together with the two vanes (22), pressure chambers (44) of the camshaft adjuster (4). A cover (1564, 156) is located on an axial side of the ring-shaped outer part, and the cover includes a cavity for holding hydraulic fluid from the pressure chambers (44). The segment (52) may also have a cavity (70) for holding a hydraulic fluid from the pressure chambers (44).Type: ApplicationFiled: November 2, 2015Publication date: February 25, 2016Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Andreas Wedel, Olaf Boese, Steffen Racklebe
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Patent number: 9206713Abstract: A stator (20) for a camshaft adjuster (4). The stator (20) has an outer part (50) for concentrically holding a rotor (22) with vanes (34) arranged around the rotor (22) and a segment (52) projecting from the outer part (50) for engaging between two vanes (34) of the rotor (22), in order to form, together with the two vanes (22), pressure chambers (44) of the camshaft adjuster (4). Here, the segment (52) has a cavity (70) for holding a hydraulic fluid from the pressure chambers (44).Type: GrantFiled: January 22, 2013Date of Patent: December 8, 2015Assignee: Schaeffler Technologies AG & Co. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Andreas Wedel, Olaf Boese, Steffen Racklebe
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Publication number: 20150135864Abstract: A camshaft unit (1), having a first camshaft (2) which is phase-adjustable with respect to a crankshaft, having a second camshaft (3) which is arranged concentrically with respect to the first camshaft (2), and having a camshaft adjuster (5) by which both camshafts (2, 3) are phase-adjusted with respect to the crankshaft.Type: ApplicationFiled: May 16, 2013Publication date: May 21, 2015Applicant: Schaeffler Technologies GmbH & Co. KGInventors: Jens Schafer, Sebastian Zwahr
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Publication number: 20150122208Abstract: Camshaft unit (1) having a first camshaft (2), which is phase-adjustable with respect to a crankshaft, a second camshaft (3), which is disposed concentric to the first camshaft (2) and is always in phase with the crankshaft, a camshaft adjuster (5) with which the first camshaft (2) is phase-adjustable with respect to the crankshaft, a connecting member (4), which is displaceable in the axial direction of the camshafts (2, 3) and has first toothed section (16) that meshes with counter-toothed section (6) on the first camshaft (2), and an adjusting drive (9) by which a connecting member (4) can be displaced axially, wherein through an axial advance, a relative rotation of the first camshaft (2) with respect to the connecting member (4) takes place.Type: ApplicationFiled: May 16, 2013Publication date: May 7, 2015Applicant: Schaeffler Technologies GmbH & Co. KGInventors: Jens Schafer, Sebastian Zwahr
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Patent number: 8991344Abstract: A directional valve (30) for controlling a hydraulic oil flow from a pressure port (34) via working chambers of a camshaft adjuster (4) to a tank port (58). The directional valve (30) includes an accumulator port (36) for conducting at least a part of the hydraulic oil flowing out of a working chamber into a volume accumulator (54) before said hydraulic oil flows out into the tank port (58), and the accumulator port (36) is connected via a passage (60) to the pressure port (34).Type: GrantFiled: January 18, 2013Date of Patent: March 31, 2015Assignee: Schaeffler Technologies AG & Co. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Steffen Racklebe, Andreas Wedel, Olaf Boese, Robert Heinemann
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Patent number: 8973544Abstract: A directional control valve (2) for controlling a flow of hydraulic oil from a pressure connection (80) via work chambers of a camshaft adjuster (90) to a tank connection (88). The disclosed directional control valve (2) includes an accumulator connection (86) for guiding at least a part of the hydraulic oil flowing out from a work chamber into a volume accumulator (126) before the discharge into the tank connection (88).Type: GrantFiled: January 22, 2013Date of Patent: March 10, 2015Assignee: Schaeffler Technologies AG & Co. KGInventors: Michael Busse, Jens Schafer, Martin Steigerwald, Jurgen Plate
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Patent number: 8960140Abstract: A camshaft adjuster (4) including a stator (20) and a rotor (22) which is received in the stator (20) and which can be rotated relative to the stator (20) by a pressure chamber (44), a pressure interface (46, 80) for supplying hydraulic liquid to the pressure chamber (44), and an outflow interface (78) for the discharge of the hydraulic liquid from the pressure chamber (44). The camshaft adjuster (4) also has a third interface (82) for filling the pressure chamber (44) with hydraulic liquid from a volume accumulator (47).Type: GrantFiled: January 18, 2013Date of Patent: February 24, 2015Assignee: Schaeffler Technologies AG & Co. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Andreas Wedel, Olaf Boese, Steffen Racklebe
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Patent number: 8863713Abstract: A camshaft adjustor (4), for an internal combustion engine (2), the camshaft adjustor having a stator (20), a rotor (22) which is rotatably accommodated in the stator (20), a pressure chamber (44) for adjusting the rotor (22) in relation to the stator (20) and a volume reservoir (70) for equalizing a negative pressure in the pressure chamber (44) via a channel (88) between the pressure chamber (44) and the volume reservoir (70). A non-return valve (72) having a closure part (102) for blocking a channel (88) which opens a volume reservoir (70) into a pressure chamber (44) in a camshaft adjustor (4), wherein the non-return valve (72) is formed of a metal sheet and the closure part (102) is realized so as to be movable in a recess (98) of the metal sheet (92) with two oppositely situated ends (94, 96) which are bent toward each other.Type: GrantFiled: January 28, 2013Date of Patent: October 21, 2014Assignee: Schaeffler Technologies GmbH & Co. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Andreas Wedel, Olaf Boese, Steffen Racklebe
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Patent number: 8863712Abstract: A camshaft adjuster (4) for a camshaft (12) of an internal combustion engine (2). The camshaft adjuster (4) includes a stator (20), a rotor (22) housed concentrically in the stator (20) and mounted rotatably about a rotational axis (78) relative to the stator (20), and a volume accumulator (70) for receiving a hydraulic fluid from a pressure chamber (44) formed between the rotor (22) and the stator (20). The volume accumulator (70) has an outlet (76) in a direction of the rotational axis (78).Type: GrantFiled: January 23, 2013Date of Patent: October 21, 2014Assignee: Schaeffler Technologies GmbH & Co. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Andreas Wedel, Olaf Boese, Steffen Racklebe
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Patent number: 8844484Abstract: A camshaft adjuster with a drive element, a driven element, and a pressure chamber formed between the drive element and the driven element for generating a relative rotation between the driven element and the drive element, and a volume accumulator that is arranged in the camshaft adjuster and supplies hydraulic medium via a channel from the volume accumulator to the pressure chamber if there is an under-pressure in the pressure chamber. The camshaft adjuster has a non-return valve with a closing part for closing an opening of the channel, the non-return valve allows a flow of hydraulic medium through the channel from the volume accumulator to the pressure chamber, and there is an elastically expandable component that projects into the channel and can be guided by the channel and is connected to the closing part and is provided for applying tension for pulling the closing part into the channel.Type: GrantFiled: January 16, 2013Date of Patent: September 30, 2014Assignee: Schaeffler Technologies GmbH & Co. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Andreas Wedel, Olaf Boese, Steffen Racklebe
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Patent number: 8776747Abstract: A stator (20) for a camshaft adjuster (4). The stator (20) has a ring-shaped outer part (50) for the concentric holding of a rotor (22) with vanes (34) that project in the axial direction and are arranged on the periphery around the rotor (22) and a segment (52) that projects inward in the radial direction from the ring-shaped outer part (50) for engaging between two vanes (34) of the rotor (22), in order to form, together with the two vanes (22), pressure chambers (44) of the camshaft adjuster (4). Here, the segment (52) has a cavity (70) for holding a hydraulic fluid from the pressure chambers (44).Type: GrantFiled: January 28, 2013Date of Patent: July 15, 2014Assignee: Scheaffler Technologies GmbH & Co. KGInventors: Jens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Andreas Wedel, Olaf Boese, Steffen Racklebe
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Patent number: 8644444Abstract: An assembly of the type having a water channel extending along a longitudinal axis and having an upper section of larger cross-section area than a lower section and at least one fuel rod receiving groove extending longitudinally on the outer surface of the lower section, fuel rods extending longitudinally and disposed around the water channel and fixing members for fixing at least one fuel rod to the water channel in the at least one groove below the upper section. According to one aspect of the invention, the at least one groove extends along the upper section such that a fuel rod received in fixing members is longitudinally extractable or insertable from the upper end side of the fuel assembly.Type: GrantFiled: March 30, 2009Date of Patent: February 4, 2014Assignee: Areva NPInventors: Matthias Dietrich, Michael Liebler, Hans-Joachim Lippert, Roland Rink, Jens Schäfer, Thomas Schubert
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Patent number: 8499733Abstract: A device for adjusting the relative rotation angle position of a rotating shaft (1), in particular of a camshaft, relative to a drive element (2), including a substantially hollow-cylindrical displacement member (3), which is arranged coaxially to the shaft (1) and to the drive element (2) and is coupled to the shaft (1) and to the drive element (2) such that an axial displacement of the displacement member (3) effects an adjustment of the relative rotation position of the shaft (1) relative to the drive element (2), and an actuating unit (4) for axially displacing the displacement member (3), the actuating unit comprising two brake actuators (5, 6) and two counter-rotating threaded drives (7, 8) for coupling the brake actuators (5, 6) to the displacement member (3) such that, upon selective actuation of a brake actuator (5, 6), an axial displacement of the displacement member (3) takes place in one direction or the other.Type: GrantFiled: March 29, 2011Date of Patent: August 6, 2013Assignee: Schaeffler Technologies AG & Co. KGInventors: Sebastian Zwahr, Jens Schafer
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Patent number: 8485150Abstract: Groups of camshafts (6) are connected to camshaft adjusters (1) via adapters. According to prior art, adaptations to the camshaft adjuster (1) are necessary for different mounting conditions and/or different geometries of camshafts (6). Here, an adapter (32) is provided between camshaft (6) and camshaft adjuster (1), which adapter can then be adapted to different geometries of the camshaft (6) and/or mounting positions. By this, the multiplicity of parts can be reduced.Type: GrantFiled: June 29, 2007Date of Patent: July 16, 2013Assignee: Schaeffler Technologies AG & Co. KGInventors: Jens Schafer, Mike Kohrs
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Publication number: 20130023349Abstract: A device for adjusting the relative rotation angle position of a rotating shaft (1), in particular of a camshaft, relative to a drive element (2), including a substantially hollow-cylindrical displacement member (3), which is arranged coaxially to the shaft (1) and to the drive element (2) and is coupled to the shaft (1) and to the drive element (2) such that an axial displacement of the displacement member (3) effects an adjustment of the relative rotation position of the shaft (1) relative to the drive element (2), and an actuating unit (4) for axially displacing the displacement member (3), the actuating unit comprising two brake actuators (5, 6) and two counter-rotating threaded drives (7, 8) for coupling the brake actuators (5, 6) to the displacement member (3) such that, upon selective actuation of a brake actuator (5, 6), an axial displacement of the displacement member (3) takes place in one direction or the other.Type: ApplicationFiled: March 29, 2011Publication date: January 24, 2013Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Sebastian Zwahr, Jens Schafer
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Publication number: 20120243652Abstract: A nuclear fuel assembly for a boiling water reactor is provided. The nuclear fuel assembly includes a base, a head and a bundle of full length fuel rods and partial length fuel rods. The bundle extends longitudinally between the base and the head, at least one partial length fuel rod having a lower end received in a housing provided in the base and delimited by a closed bottom larger than the lower end. The housing is further delimited by a peripheral wall surrounding the lower end and the partial length fuel rod rests freely on the bottom.Type: ApplicationFiled: September 28, 2010Publication date: September 27, 2012Applicant: AREVA NPInventors: Jens Schäfer, Juris Kronenberg
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Patent number: 8211219Abstract: A filter, in particular for compressed gas systems, includes a filter top part having at least one inlet channel and at least one outlet channel and a filter bottom part having a filter element, wherein the filter top part has a pressure-resistant housing and an insert which is suited in an optimal manner to the course of the inlet and outlet channels.Type: GrantFiled: June 21, 2007Date of Patent: July 3, 2012Assignee: Donaldson Filtration Deutschland GmbHInventors: Hans-Michael Schuster, Jens Schäfer, Abdelkhalic Rbayti, Peter Groth