Patents by Inventor Jules Ngamga Nzepa

Jules Ngamga Nzepa 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).

  • Ball screw
    Patent number: 8857283
    Abstract: Ball screw comprising a ball nut (1), which is rotatably mounted on a threaded shaft and on the inner circumference of which at least one ball thread (2) wound around an axis (8) in a coil shape is provided for balls (3) to roll on, wherein at least one recirculating element (5), which is arranged on the outer circumference of the ball nut (1) and which is provided with a recirculating channel for the balls (3), connects a start of a coil to an end of a coil of the ball thread by means of the two ends of the recirculating element in order to enable endless recirculation of the balls (3), wherein the ball nut (1) is provided with a flange (6) for fastening a belt pulley (15) and with a bearing seat (9), and a sleeve (12) pushed onto the ball nut is provided with a perfectly cylindrical outer circumferential surface, which outer circumferential surface secures the recirculating element (5) on the ball nut (1) and surrounds the ball nut (1) in a tubular shape between the flange (6) and the bearing seat (9).
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: October 14, 2014
    Assignee: ThyssenKrupp Presta AG
    Inventors: Alexander Kiforiuk, Dennis Kontner, Jules Ngamga Nzepa, Philippe Steck
  • BALL SCREW
    Publication number: 20130247701
    Abstract: Ball screw comprising a ball nut (1), which is rotatably mounted on a threaded shaft and on the inner circumference of which at least one ball thread (2) wound around an axis (8) in a coil shape is provided for balls (3) to roll on, wherein at least one recirculating element (5), which is arranged on the outer circumference of the ball nut (1) and which is provided with a recirculating channel for the balls (3), connects a start of a coil to an end of a coil of the ball thread by means of the two ends of the recirculating element in order to enable endless recirculation of the balls (3), wherein the ball nut (1) is provided with a flange (6) for fastening a belt pulley (15) and with a bearing seat (9), and a sleeve (12) pushed onto the ball nut is provided with a perfectly cylindrical outer circumferential surface, which outer circumferential surface secures the recirculating element (5) on the ball nut (1) and surrounds the ball nut (1) in a tubular shape between the flange (6) and the bearing seat (9).
    Type: Application
    Filed: November 16, 2011
    Publication date: September 26, 2013
    Applicant: ThyessenKrupp Presta AG
    Inventors: Alexander Kiforiuk, Dennis Kontner, Jules Ngamga Nzepa, Philippe Steck