Patents by Inventor Johannes Andrianus Maria Duits
Johannes Andrianus Maria Duits 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: 9109966Abstract: A force sensor has an input part, a base part, an intermediate part and a sensor element. The external force to be sensed is applied to the input part. The input part transmits the external force to the base part via the intermediate part. The base part is fixed to a frame of reference and exerts a reaction force on the input part via the intermediate part. The intermediate part deforms as a result of the external force and the reaction force. The deformation of the intermediate part causes the input part to change its position or orientation relative to the base part. The sensor element senses this change and supplies an output signal representative of the change.Type: GrantFiled: June 7, 2011Date of Patent: August 18, 2015Assignee: AKTIEBOLAGET SKFInventor: Johannes Andrianus Maria Duits
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Publication number: 20150090542Abstract: The invention relates to a locking device to radially lock a rotatable cylindrical element, where the locking device (1) comprises a roller element (2) and at least a first inclined surface (3). The locking device is arranged to be positioned in relation to a cylindrical surface (13) around the cylindrical element (12) in such a way that the distance between a starting point (10) of the first inclined surface (3) and the cylindrical surface (13) is larger than the diameter of the roller element (2) and that the distance between an end point (11) of the first inclined surface (3) and the cylindrical surface (13) is smaller than the diameter of the roller element (2). The locking device further comprises means (6) to selectively enable the roller element (2) to be distanced from the cylindrical surface (13). The advantage of the invention is that a locking device can be obtained in an easy and cost-effective way.Type: ApplicationFiled: November 19, 2014Publication date: April 2, 2015Inventors: Johannes Andrianus Maria Duits, Thomas Jehle
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Patent number: 8791661Abstract: A linear actuator comprising a spindle, a spindle nut, a transmission, an electrical motor, and an actuation element, is arranged to linearly move the actuation element by means of an interaction of the spindle and the spindle nut, which interaction is being driven by the electrical motor through the transmission. A position of the actuation element, the relative position between spindle and spindle nut, is determined by means of an absolute rotary position sensor and a counter. The counter keeps track of the number of under-flows and over-flows the absolute rotary position sensor generates during movement of the actuation element. A combination of a value from the absolute rotary position sensor and a count from the counter determines the position.Type: GrantFiled: July 30, 2010Date of Patent: July 29, 2014Assignee: Aktiebolaget SKFInventors: Johannes Andrianus Maria Duits, Mario Rossi
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Patent number: 8716960Abstract: A linear actuator comprising a spindle, a spindle nut, a transmission, an electrical motor, and an actuation element, is arranged to linearly move the actuation element by means of an interaction of the spindle and the spindle nut, which interaction is being driven by the electrical motor through the transmission. A position of the actuation element, the relative position between spindle and spindle nut, is determined by means of an absolute rotary position sensor and a counter. The counter keeps track of the number of under-flows and over-flows the absolute rotary position sensor generates during movement of the actuation element. A combination of a value from the absolute rotary position sensor and a count from the counter determines the position.Type: GrantFiled: January 30, 2013Date of Patent: May 6, 2014Assignee: Aktiebolaget SKFInventors: Johannes Andrianus Maria Duits, Mario Rossi
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Publication number: 20140000385Abstract: A force sensor has an input part, a base part, an intermediate part and a sensor element. The external force to be sensed is applied to the input part. The input part transmits the external force to the base part via the intermediate part. The base part is fixed to a frame of reference and exerts a reaction force on the input part via the intermediate part. The intermediate part deforms as a result of the external force and the reaction force. The deformation of the intermediate part causes the input part to change its position or orientation relative to the base part. The sensor element senses this change and supplies an output signal representative of the change.Type: ApplicationFiled: June 7, 2011Publication date: January 2, 2014Inventor: Johannes Andrianus Maria Duits
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Publication number: 20130207584Abstract: A linear actuator comprising a spindle, a spindle nut, a transmission, an electrical motor, and an actuation element, is arranged to linearly move the actuation element by means of an interaction of the spindle and the spindle nut, which interaction is being driven by the electrical motor through the transmission. A position of the actuation element, the relative position between spindle and spindle nut, is determined by means of an absolute rotary position sensor and a counter. The counter keeps track of the number of under-flows and over-flows the absolute rotary position sensor generates during movement of the actuation element. A combination of a value from the absolute rotary position sensor and a count from the counter determines the position.Type: ApplicationFiled: July 30, 2010Publication date: August 15, 2013Inventors: Johannes Andrianus Maria Duits, Mario Rossi
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Patent number: 8508168Abstract: Linear actuator device, comprising a housing (102,202), a piston rod (109,209), an electrical motor (116,216) and a transmission means (105,106,305,307) adapted to transfer the rotation of the electrical motor to a linear movement of the piston rod, where the linear actuator device comprises an integrated electrical interface having two signal inputs adapted to extend and retract the piston rod and two signal outputs adapted to indicate a retracted end position (122) and an extended end position (121) of the piston rod.Type: GrantFiled: June 3, 2008Date of Patent: August 13, 2013Assignee: Aktiebolaget SKFInventor: Johannes Andrianus Maria Duits
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Publication number: 20130141030Abstract: A linear actuator comprising a spindle, a spindle nut, a transmission, an electrical motor, and an actuation element, is arranged to linearly move the actuation element by means of an interaction of the spindle and the spindle nut, which interaction is being driven by the electrical motor through the transmission. A position of the actuation element, the relative position between spindle and spindle nut, is determined by means of an absolute rotary position sensor and a counter. The counter keeps track of the number of under-flows and over-flows the absolute rotary position sensor generates during movement of the actuation element. A combination of a value from the absolute rotary position sensor and a count from the counter determines the position.Type: ApplicationFiled: January 30, 2013Publication date: June 6, 2013Applicant: AKTIEBOLAGET SKFInventors: Johannes Andrianus Maria Duits, Mario Rossi
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Patent number: 8453530Abstract: Linear actuator device, comprising a housing (2), an externally threaded screw (5) mounted to a piston (9), an internally threaded extended nut (7) and a motor (16) comprising a stator (33) and a rotor element (30) positioned around the extended nut (7), wherein a plurality of first magnets (31) of the rotor element (30) are positioned in relation to the stator (33) such that the stator (33) lies between the extended nut (7) and the first magnets (31) of the rotor element (30). The advantage of the invention is that linear actuators with a high energy density can be manufactured in an easy and cost-effective manner.Type: GrantFiled: August 1, 2007Date of Patent: June 4, 2013Assignee: Aktiebolaget SKFInventors: Johannes Andrianus Maria Duits, Patric Eberle
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Patent number: 8286519Abstract: Linear actuator device, comprising a housing (2), an externally threaded screw (5), a piston (9) and an internally threaded extended nut (7), where the extended nut (7) comprises a plurality of longitudinal segments (40) having longitudinal edges (39) parallel to a center axis (18) of the internally threaded nut (7), where each segment (40) has an identical radius of curvature and an angle of curvature of less than 360°, so that the circumference of the internally threaded nut (7) is formed by at least two segments (40). One advantage of the invention is that linear actuators of different lengths can be manufactured in an easy and cost-effective manner.Type: GrantFiled: August 1, 2007Date of Patent: October 16, 2012Assignee: Aktiebolaget SKFInventors: Johannes Andrianus Maria Duits, Martin Voegelin
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Publication number: 20110089879Abstract: Linear actuator device, comprising a housing (102,202), a piston rod (109,209), an electrical motor (116,216) and a transmission means (105,106,305,307) adapted to transfer the rotation of the electrical motor to a linear movement of the piston rod, where the linear actuator device comprises an integrated electrical interface having two signal inputs adapted to extend and retract the piston rod and two signal outputs adapted to indicate a retracted end position (122) and an extended end position (121) of the piston rod.Type: ApplicationFiled: June 3, 2008Publication date: April 21, 2011Inventor: Johannes Andrianus Maria Duits
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Publication number: 20110067961Abstract: The invention relates to a locking device to radially lock a rotatable cylindrical element, where the locking device (1) comprises a roller element (2) and at least a first inclined surface (3). The locking device is arranged to be positioned in relation to a cylindrical surface (13) around the cylindrical element (12) in such a way that the distance between a starting point (10) of the first inclined surface (3) and the cylindrical surface (13) is larger than the diameter of the roller element (2) and that the distance between an end point (11) of the first inclined surface (3) and the cylindrical surface (13) is smaller than the diameter of the roller element (2). The locking device further comprises means (6) to selectively enable the roller element (2) to be distanced from the cylindrical surface (13). The advantage of the invention is that a locking device can be obtained in an easy and cost-effective way.Type: ApplicationFiled: September 19, 2007Publication date: March 24, 2011Inventors: Johannes Andrianus Maria Duits, Thomas Jehle
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Publication number: 20100206103Abstract: Linear actuator device, comprising a housing (2), an externally threaded screw (5) mounted to a piston (9), an internally threaded extended nut (7) and a motor (16) comprising a stator (33) and a rotor element (30) positioned around the extended nut (7), wherein a plurality of first magnets (31) of the rotor element (30) are positioned in relation to the stator (33) such that the stator (33) lies between the extended nut (7) and the first magnets (31) of the rotor element (30). The advantage of the invention is that linear actuators with a high energy density can be manufactured in an easy and cost-effective manner.Type: ApplicationFiled: August 1, 2007Publication date: August 19, 2010Inventors: Johannes Andrianus Maria Duits, Patric Eberle
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Publication number: 20100192713Abstract: Linear actuator device, comprising a housing (2), an externally threaded screw (5), a piston (9) and an internally threaded extended nut (7), where the extended nut (7) comprises a plurality of longitudinal segments (40) having longitudinal edges (39) parallel to a center axis (18) of the internally threaded nut (7), where each segment (40) has an identical radius of curvature and an angle of curvature of less than 360°, so that the circumference of the internally threaded nut (7) is formed by at least two segments (40). One advantage of the invention is that linear actuators of different lengths can be manufactured in an easy and cost-effective manner.Type: ApplicationFiled: August 1, 2007Publication date: August 5, 2010Inventors: Johannes Andrianus Maria Duits, Martin Voegelin
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Patent number: 7183760Abstract: Disclosed is a rotational speed sensor comprising a rotatable ring. The rotational speed sensor has K magnetic pole pairs distributed angularly over the rotatable ring. Also, sensors are positioned relative to the rotatable ring such that a varying magnetic field is detected. The sensors comprise a first pair being positioned 2?L/K radians apart. The sensors further comprise a second pair being positioned 2?M/K radians apart. The first pair of sensors and second pair of sensors are positioned at a relative position of (2?/K)*((2n?1)/2 radians. L, M are integers between one and K and n is an integer greater than one.Type: GrantFiled: January 23, 2003Date of Patent: February 27, 2007Assignee: AB SKFInventors: Hendrik Anne Mol, Johannes Andrianus Maria Duits
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Publication number: 20030115977Abstract: Method for determining a grease condition in a bearing (10), comprising the steps of measuring at least one operational parameter of the bearing (10) and determining the grease condition by inputting the measured at least one operational parameter into a model. The model interrelates the at least one operational parameter and the grease condition for a specific combination of a predetermined type of grease and a predetermined type of bearing (10). The present invention also relates to a bearing (10) provided with a processing unit (13) and at least one sensor (11, 12), in which the processing unit (13) implements the present method.Type: ApplicationFiled: August 8, 2002Publication date: June 26, 2003Inventors: Eduardus Gerardus Maria Holweg, Johannes Albertus Van Winden, Johannes Andrianus Maria Duits