Patents by Inventor Steven A. Jensen
Steven A. Jensen 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: 7503450Abstract: A slip roller conveyor has a frame comprising a pair of parallel, spaced-apart side plates. Secured to each of the side plates is a plurality of annular rollers with a predetermined pitch distance between adjacent rollers. The annular rollers have tubular sleeves of a lesser diameter projecting outward from a side surface thereof. The tubular sleeves on an opposed pair of annular rollers fit into the lumen of a longer tubular roller with a clearance fit. The annular rollers on each of the side plates are driven by an endless belt that also surrounds a motor-driven nose roller.Type: GrantFiled: August 13, 2007Date of Patent: March 17, 2009Assignee: MagStar Technologies, Inc.Inventors: David E. Helgerson, Steven A. Jensen, Joshua D. Krause, Brian D. Koenig, Robert J. Robinson
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Publication number: 20090045035Abstract: A slip roller conveyor has a frame comprising a pair of parallel, spaced-apart side plates. Secured to each of the side plates is a plurality of annular rollers with a predetermined pitch distance between adjacent rollers. The annular rollers have tubular sleeves of a lesser diameter projecting outward from a side surface thereof. The tubular sleeves on an opposed pair of annular rollers fit into the lumen of a longer tubular roller with a clearance fit. The annular rollers on each of the side plates are driven by an endless belt that also surrounds a motor-driven nose roller.Type: ApplicationFiled: August 13, 2007Publication date: February 19, 2009Applicant: MagStar Technologies, Inc.Inventors: David E. Helgerson, Steven A. Jensen, Joshua D. Krause, Brian D. Koenig, Robert J. Robinson
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Patent number: 7175018Abstract: The conveyor apparatus disclosed herein is generally formed of a first rail and a second rail, each rail having a plurality of rollers. A portion of the rollers are desirably drive rollers, receiving power from an integral motor assembly. The motor generally comprises a stator that is coupled to the rail and an outer roller assembly rotatably coupled to the rail. The roller assembly includes an outer circumferential magnetized portion positioned in surrounding engagement to the motor stator and functions both as the motor rotor and the conveying surface of the roller. Non-slip roller covering material may be attached to the exterior of the roller assembly. A circuit board having logic controls is preferably in communication with at least one sensor and the motor rotor to regulate rotation of the motor rotor during use of the conveyor.Type: GrantFiled: September 22, 2005Date of Patent: February 13, 2007Assignee: Magstar Technologies, Inc.Inventors: David E. Helgerson, Brian D. Koenig, Steven A. Jensen, John Fresonke, Timothy J. Hall
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Patent number: 6959804Abstract: The conveyor apparatus disclosed herein is generally formed of a first rail and a second rail, each rail having a plurality of rollers. A portion of the rollers are desirably drive rollers, receiving power from an integral motor assembly. The motor generally comprises a stator that is coupled to the rail and an outer roller assembly rotatably coupled to the rail. The roller assembly includes an outer circumferential magnetized portion positioned in surrounding engagement to the motor stator and functions both as the motor rotor and the conveying surface of the roller. Non-slip roller covering material may be attached to the exterior of the roller assembly. A circuit board having logic controls is preferably in communication with at least one sensor and the motor rotor to regulate rotation of the motor rotor during use of the conveyor.Type: GrantFiled: July 18, 2003Date of Patent: November 1, 2005Assignee: Magstar Technologies, Inc.Inventors: David E. Helgerson, Brian D. Koenig, Steven A. Jensen, John Fresonke, Timothy J. Hall
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Publication number: 20040016626Abstract: The conveyor apparatus disclosed herein is generally formed of a first rail and a second rail, each rail having a plurality of rollers. A portion of the rollers are desirably drive rollers, receiving power from an integral motor assembly. The motor generally comprises a stator that is coupled to the rail and an outer roller assembly rotatably coupled to the rail. The roller assembly includes an outer circumferential magnetized portion positioned in surrounding engagement to the motor stator and functions both as the motor rotor and the conveying surface of the roller. Non-slip roller covering material may be attached to the exterior of the roller assembly. A circuit board having logic controls is preferably in communication with at least one sensor and the motor rotor to regulate rotation of the motor rotor during use of the conveyor.Type: ApplicationFiled: July 18, 2003Publication date: January 29, 2004Applicant: MAGSTAR TECHNOLOGIES, INC.Inventors: David E. Helgerson, Brian D. Koenig, Steven A. Jensen, John Fresonke, Timothy J. Hall
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Patent number: 6325351Abstract: A highly damped kinematic coupling for precision instruments. The kinematic coupling provides support while causing essentially no influence to its nature shape, with such influences coming, for example, from manufacturing tolerances, temperature changes, or ground motion. The coupling uses three ball-cone constraints, each combined with a released flexural degree of freedom. This arrangement enables a gain of higher load capacity and stiffness, but can also significantly reduce the friction level in proportion to the ball radius divided by the distance between the ball and the hinge axis. The blade flexures reduces somewhat the stiffness of the coupling and provides an ideal location to apply constrained-layer damping which is accomplished by attaching a viscoelastic layer and a constraining layer on opposite sides of each of the blade flexures.Type: GrantFiled: January 5, 2000Date of Patent: December 4, 2001Assignee: The Regents of the University of CaliforniaInventors: Layton C. Hale, Steven A. Jensen