Patents by Inventor Sigurd Wilhelm
Sigurd Wilhelm 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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Patent number: 11313444Abstract: A threaded nut of a ball-screw for a brake booster is constructed as a hydraulic piston and is produced from the group of martensitically hardening steels which are non-corroding with respect to brake fluid and which has in percent by weight: between 0.4% and 1.3% carbon (C), up to 2% silicon (Si), up to 2% manganese (Mn), between 12% and 20% chromium (Cr), and phosphorus (P) and sulphur (S) together at less than 0.015%, the balance being iron and, where applicable, melting-related impurities. Addition of the following materials to the above-described steel may be advantageous: up to 2% molybdenum (Mo), up to 0.2% vanadium (V), and up to 3% nickel (Ni).Type: GrantFiled: July 23, 2018Date of Patent: April 26, 2022Assignee: Schaeffler Technologies AG & Co. KGInventors: Sigurd Wilhelm, Dieter Adler, Ernst Strian
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Publication number: 20200224753Abstract: A threaded nut of a ball-screw for a brake booster is constructed as a hydraulic piston and is produced from the group of martensitically hardening steels which are non-corroding with respect to brake fluid and which has in percent by weight: between 0.4% and 1.3% carbon (C), up to 2% silicon (Si), up to 2% manganese (Mn), between 12% and 20% chromium (Cr), and phosphorus (P) and sulphur (S) together at less than 0.015%, the balance being iron and, where applicable, melting-related impurities. Addition of the following materials to the above-described steel may be advantageous: up to 2% molybdenum (Mo), up to 0.2% vanadium (V), and up to 3% nickel (Ni).Type: ApplicationFiled: July 23, 2018Publication date: July 16, 2020Applicant: Schaeffler Technologies AG & Co. KGInventors: Sigurd Wilhelm, Dieter Adler, Ernst Strian
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Publication number: 20190277380Abstract: The threaded nut of a ball screw drive is adapted for applications that constrain the axial length such as brake boosters. The threaded nut includes an outer sealing surface suitable for sealing the threaded nut within a housing to form a pressurized chamber. The ball channels are at least partially axially overlapping with the outer sealing surface. Some embodiments may also include a ring groove on the outer periphery for receiving a sealing ring. Some embodiments may further include an inner sealing surface axially adjacent to the ball channels.Type: ApplicationFiled: November 13, 2017Publication date: September 12, 2019Applicant: Schaeffler Technologies AG & Co. KGInventors: Markus Oswald, Dieter Adler, Sigurd Wilhelm
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Patent number: 9593752Abstract: A ball screw (1) having a threaded nut (3) arranged on the threaded shaft (2) and a ball channel (4) wound about the longitudinal axis of the threaded shaft (2), and in which the balls (5) and at least one helical spring (6) are received. This helical spring (6) is supported on a molded part (7) which is inserted into a recess (8) of the threaded nut (3) and closes the recess (8).Type: GrantFiled: November 29, 2013Date of Patent: March 14, 2017Assignee: Schaeffler Technologies AG & Co. KGInventors: Dieter Adler, Stefanie Oeder, Sigurd Wilhelm, Bernhard Wiesneth, Nicky Heinrich
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Publication number: 20150362051Abstract: A ball screw (1) having a threaded nut (3) arranged on the threaded shaft (2) and a ball channel (4) wound about the longitudinal axis of the threaded shaft (2), and in which the balls (5) and at least one helical spring (6) are received. This helical spring (6) is supported on a molded part (7) which is inserted into a recess (8) of the threaded nut (3) and closes the recess (8).Type: ApplicationFiled: November 29, 2013Publication date: December 17, 2015Applicant: Schaeffler Technologies AG & Co. KGInventors: Dieter Adler, Stefanie Oeder, Sigurd Wilhelm, Bernard Wiesneth, Nicky Heinrich
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Publication number: 20150330487Abstract: A ball screw drive (1), including a spindle nut (8) disposed on a threaded spindle (7) and having a helical ball channel (12) which is delimited by ball grooves (10, 11) of the threaded spindle (7) and of the spindle nut (8) and in which a ball row (14) formed of balls (13) is disposed. The ball screw drive further includes a helical spring (10) which is disposed along the helical ball channel (12), is supported relative to the spindle nut (8), and is provided for contact on the ball row (14) or on a ball cage (14) which receives the balls (13). A rod (17, 21) is provided for stabilizing the helical spring (15) that engages in the helical spring (15).Type: ApplicationFiled: November 11, 2013Publication date: November 19, 2015Applicant: Schaeffler Technologies AG & Co. KGInventors: Sigurd Wilhelm, Dieter Adler, Nicky Heinrich, Stefanie Oeder, Bernhard Wiesneth
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Patent number: 8347758Abstract: A clamping device for the positional fixing of a vehicle steering column which can be adjusted in its length and/or inclination has a clamping disc and a plurality of rolling bodies, with clamping ramps for the rolling bodies being formed on the surface of the clamping disc, wherein the rolling bodies each make contact with one of a plurality of separate contact elements arranged in a common plane.Type: GrantFiled: June 14, 2006Date of Patent: January 8, 2013Assignee: Schaeffler Technologies AG & Co. KGInventor: Sigurd Wilhelm
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Patent number: 7980372Abstract: A device for damping rotary oscillations in a drive train with a freewheel clutch (27) located between a pulley (25) and a rotor hub (26) is provided. The hub (26) is connected to an input shaft of an auxiliary unit, and the pulley (25) is connected to a crankshaft via a traction means, and the freewheel clutch (27) has an inner ring (34), which surrounds the hub (26) while being fixed thereto, and includes an outer ring (35), which surrounds the inner ring (34) with radial play and which is fixed to the pulley (25). At least one locking element (36) that is actuated by centrifugal force is provided in the inner ring (34), and at least one locking receptacle (37) is provided in the outer ring (35).Type: GrantFiled: June 22, 2005Date of Patent: July 19, 2011Assignee: Schaeffler Technologies GmbH & Co. KGInventors: Bernhard Wiesneth, Harald Hochmuth, Alexander Zernickel, Sigurd Wilhelm
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Publication number: 20090000416Abstract: A clamping device for the positional fixing of a vehicle steering column which can be adjusted in its length and/or inclination has a clamping disc and a plurality of rolling bodies, with clamping ramps for the rolling bodies being formed on the surface of the clamping disc, wherein the rolling bodies each make contact with one of a plurality of separate contact elements arranged in a common plane.Type: ApplicationFiled: June 14, 2006Publication date: January 1, 2009Inventor: Sigurd Wilhelm
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Publication number: 20080093189Abstract: A device for damping rotary oscillations in a drive train with a freewheel clutch (27) located between a pulley (25) and a rotor hub (26) is provided. The hub (26) is connected to an input shaft of an auxiliary unit, and the pulley (25) is connected to a crankshaft via a traction means, and the freewheel clutch (27) has an inner ring (34), which surrounds the hub (26) while being fixed thereto, and includes an outer ring (35), which surrounds the inner ring (34) with radial play and which is fixed to the pulley (25). At least one locking element (36) that is actuated by centrifugal force is provided in the inner ring (34), and at least one locking receptacle (37) is provided in the outer ring (35).Type: ApplicationFiled: June 22, 2005Publication date: April 24, 2008Applicant: SCHAEFFLER KGInventors: Bernhard Wiesneth, Harald Hochmuth, Alexander Zernickel, Sigurd Wilhelm
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Publication number: 20060196302Abstract: Clamping device, especially for a steering column, with a first ramp plate, which can rotate relative to a second ramp plate between a released position and a clamped position by changing a distance between the ramp plates is provided. The first ramp plate (2) and the second ramp plate (3) each have at least two lifting ramps (5, 6) arranged in the circumferential direction for roller bodies and at least one guiding recess, and more preferably two diagonal guiding recesses (9, 10), in the plane of the ramp plates (2, 3) for control elements. The lifting ramps (5, 6) and the guiding recesses (9, 10) of the first and the second ramp plate (2, 3) are arranged so that they operate in opposite directions relative to each other. The roller bodies and the control elements are held in recesses (8) of a holding element (4) arranged between the ramp plates (2, 3).Type: ApplicationFiled: December 16, 2005Publication date: September 7, 2006Applicant: INA-Schaeffler KGInventors: Harald Hochmuth, Sigurd Wilhelm, Bernhard Wiesneth, Alexander Zernickel
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Patent number: 6336329Abstract: A hydraulic master cylinder for a clutch or brake of a motor vehicle is simultaneously optimized for cost-effective mass production and for functional properties.Type: GrantFiled: December 21, 1999Date of Patent: January 8, 2002Assignee: Ina Walzlager Schaffler oHGInventors: Dieter Adler, Gerhard Prosch, Sigurd Wilhelm, Wilfried Eckert
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Patent number: 5564995Abstract: A planetary transmission comprising a planet carrier (6) connected rotationally fast to a driving shaft (3), a planet gear (7) of which planet carrier (6) is simultaneously in mesh with an annulus (9) fixed on a housing (1,2) and with a sun gear (10) connected rotationally fast to a driven shaft (12) arranged concentric with the driving shaft (3), each of the driving shaft (3) and the driven shaft (12) being mounted for rotation relative to the housing (1,2) on at least one bearing (16,17) and outer and inner rings (22,25 31 34) of said bearings (16,17) being seated on bearing seats (5,14,11,15), characterized in that at least one of two bearing seats (5,14,11,15) of each bearing (16,17) comprises at an axial end thereof, a resilient projection (19,24,27,32) engaging by elastic reverse deformation, an end face of the inner or outer bearing ring (22,25,31,34) seated thereon.Type: GrantFiled: March 17, 1995Date of Patent: October 15, 1996Assignee: Ina Walzlager Schaeffler KGInventors: Ulrich Roder, Sigurd Wilhelm, Werner Hehn, Uwe Hammerl, Doris Greiner, Wolfgang Hentschke, Udo Reinhardt
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Patent number: 5558593Abstract: A planet carrier (6) of a planetary transmission wherein planet gears (7) in mesh with an annulus (9) and a sun gear (10) are mounted on pins (8) which are guided on both sides of the planet gears (7) in lodgings (15,15a) of disk-shaped carrier elements (13,13a) connected to each other, characterized in that the lodgings (15,15a) are made in the form of pockets opening radially outwards to enable radial insertion of the pins (8).Type: GrantFiled: March 17, 1995Date of Patent: September 24, 1996Assignee: Ina Walzlager Schaeffler KGInventors: Ulrich Roder, Sigurd Wilhelm, Werner Hehn, Uwe Hammerl, Doris Greiner, Wolfgang Hentschke, Udo Reinhardt
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Patent number: 5517957Abstract: A device for damping torsional vibrations in a drive train of a traction drive connecting an internal combustion piston engine and an auxiliary unit, comprising an overrunning clutch (5,30,48) arranged between a driving pulley (2,25,42) and an input shaft (1) of the auxiliary unit or between a crankshaft and a driven pulley of the internal combustion piston engine, characterized in that the overrunning clutch (5,30,48) comprises an inner or outer ring (8,9,28,29,50) made of sheet metal without chip removal on which locking ramps cooperating with locking rollers (10,30a,48a) are formed, and the inner or outer ring (8,9,28,29,50) extends at least on one side beyond a region of the locking ramps to form a raceway for a rolling bearing (6,7,31,32,45,49).Type: GrantFiled: September 11, 1995Date of Patent: May 21, 1996Assignee: INA Walzlager Schaeffler KGInventors: Jorg Wagner, Norbert Bethke, Ernst Neuwirth, Henrik Brehler, Rudolf Polster, Sigurd Wilhelm