Patents by Inventor Johan Kotze

Johan Kotze 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).

  • Patent number: 7572196
    Abstract: The present invention relates to a dampening device for ball game rackets. The dampening device of the present invention includes at least one dampening element having a foot or base region, a head region and a neck or connection region arranged between the foot region and the head region. The provision of a neck or connection region leads to an optimum distance between foot or base region and head region and/or an optimum and safe positioning of the head region in the stringing plane at a preferred distance from the heart region of the racket. Preferably, the neck region is tapered or necked relative to the foot or base region and/or the head region at least in the width or thickness direction of the dampening device of the invention.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: August 11, 2009
    Assignee: Head Technology GmbH
    Inventors: Johan Kotze, Stefan Mohr, Jürgen Wilke
  • Publication number: 20090191989
    Abstract: A sports product may include a support member and an impact region configured to impact an object. The impact region may be coupled to the support member. The sports product may also include a shear thickening material in at least one of the support member or the impact region. The shear thickening material may be configured to exhibit shear thickening behavior when an impact occurs between the impact region and the object.
    Type: Application
    Filed: October 23, 2008
    Publication date: July 30, 2009
    Inventors: Herfried Lammer, Harald Rosenkranz, Johan Kotze, Ralf Schwenger
  • Publication number: 20090163306
    Abstract: The disclosure relates to a racket for ball games, and in particular, a tennis or squash racket, with a head region for receiving a stringing defining a stringing plane, a grip portion for holding the racket, and a heart region wherein the heart region has two arms and a bridge. The bridge may be pivot-mounted on both arms relative to an axis substantially perpendicular to the stringing plane. The present disclosure further relates to a method for manufacturing a racket including the step of manufacturing a racket frame with a head region, two arms, and a grip portion in a blow molding process. The method may also include manufacturing a bridge for a racket frame in the blow molding process. The method may further include connecting the bridge with the remaining racket frame.
    Type: Application
    Filed: November 25, 2008
    Publication date: June 25, 2009
    Inventors: Harald Rosenkranz, Johan Kotze, Stefan Mohr, Ralf Schwenger
  • Publication number: 20070293357
    Abstract: The present invention relates to a dampening device for ball game rackets. The dampening device of the present invention includes at least one dampening element having a foot or base region, a head region and a neck or connection region arranged between the foot region and the head region. The provision of a neck or connection region leads to an optimum distance between foot or base region and head region and/or an optimum and safe positioning of the head region in the stringing plane at a preferred distance from the heart region of the racket. Preferably, the neck region is tapered or necked relative to the foot or base region and/or the head region at least in the width or thickness direction of the dampening device of the invention.
    Type: Application
    Filed: February 2, 2007
    Publication date: December 20, 2007
    Inventors: Johan Kotze, Stefan Mohr, Jurgen Wilke
  • Patent number: 7140984
    Abstract: The present invention relates to an improved racket for ball games, in particular a tennis racket, squash racket, badminton racket, racquet ball racket or paddle tennis racket comprising a frame consisting of a racket head and a handle portion connected thereto and being formed of a frame profile, wherein the racket head defines a stringing plane. The frame profile comprises four trough-shaped depressions which are arranged opposite to one another in pairs and essentially symmetrical with respect to the longitudinal axis of the racket. The depressions are preferably formed in the area between two o'clock and four o'clock and/or eight o'clock and ten o'clock on the racket head. Particularly preferably, the positions are at about three o'clock and/or nine o'clock. The racket of the present invention thus exhibits particularly advantageous ball control characteristics.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: November 28, 2006
    Assignee: Head Technology GmbH
    Inventors: Johannes Mauser, Klaus Rambach, Manfred Emberger, Johan Kotze, Herfried Lammer
  • Patent number: 7077767
    Abstract: The present invention relates to a racket for ball games, in particular a tennis racket, squash racket, badminton racket, racquet ball racket or paddle tennis racket comprising a frame consisting of a racket head and a handle portion connected thereto and being formed of a hollow profile. The hollow profile is formed by winding a plurality of web-like layers. On the racket head and/or in the heart region, the racket comprises at least one dampening layer being wrapped between the layers forming the hollow profile. The racket thus exhibits excellent dampening characteristics and can effectively minimize shock and/or vibration.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: July 18, 2006
    Assignee: Head Technology GmbH
    Inventors: Johannes Mauser, Klaus Rambach, Manfred Emberger, Johan Kotze, Herfried Lammer
  • Patent number: 7044869
    Abstract: The present invention relates to an improved racket for ball games, in particular a tennis racket, squash racket, badminton racket, racquet ball racket or paddle tennis racket, comprising a frame consisting of a racket head and a handle portion connected thereto and being formed of a frame profile, wherein the racket head defines a stringing plane. The frame profile comprises at least one opening extending through the frame profile essentially perpendicular with respect to the stringing plane of the racket. Preferably, at least two openings of this kind are provided essentially symmetrical with respect to the longitudinal axis of the racket at about two o'clock to four o'clock and/or eight o'clock to ten o'clock on the racket head. Particularly preferably, the openings are at about three o'clock and/or nine o'clock. The racket of the present invention thus exhibits particularly advantageous ball control characteristics.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: May 16, 2006
    Assignee: Head Technology GmbH
    Inventors: Johannes Mauser, Klaus Rambach, Manfred Emberger, Johan Kotze, Herfried Lammer
  • Publication number: 20050197218
    Abstract: The present invention relates to a racket for ball games, in particular a tennis racket, squash racket, badminton racket, racquet ball racket or paddle tennis racket comprising a frame consisting of a racket head and a handle portion connected thereto and being formed of a hollow profile. The hollow profile is formed by winding a plurality of web-like layers. On the racket head and/or in the heart region, the racket comprises at least one dampening layer being wrapped between the layers forming the hollow profile. The racket thus exhibits excellent dampening characteristics and can effectively minimize shock and/or vibration.
    Type: Application
    Filed: March 30, 2004
    Publication date: September 8, 2005
    Inventors: Johannes Mauser, Klaus Rambach, Manfred Emberger, Johan Kotze, Herfried Lammer
  • Publication number: 20050164812
    Abstract: The present invention relates to an improved racket for ball games, in particular a tennis racket, squash racket, badminton racket, racquet ball racket or paddle tennis racket comprising a frame consisting of a racket head and a handle portion connected thereto and being formed of a frame profile, wherein the racket head defines a stringing plane. The frame profile comprises four trough-shaped depressions which are arranged opposite to one another in pairs and essentially symmetrical with respect to the longitudinal axis of the racket. The depressions are preferably formed in the area between two o'clock and four o'clock and/or eight o'clock and ten o'clock on the racket head. Particularly preferably, the positions are at about three o'clock and/or nine o'clock. The racket of the present invention thus exhibits particularly advantageous ball control characteristics.
    Type: Application
    Filed: March 30, 2004
    Publication date: July 28, 2005
    Inventors: Johannes Mauser, Klaus Rambach, Manfred Emberger, Johan Kotze, Herfried Lammer
  • Publication number: 20050164813
    Abstract: The present invention relates to an improved racket for ball games, in particular a tennis racket, squash racket, badminton racket, racquet ball racket or paddle tennis racket, comprising a frame consisting of a racket head and a handle portion connected thereto and being formed of a frame profile, wherein the racket head defines a stringing plane. The frame profile comprises at least one opening extending through the frame profile essentially perpendicular with respect to the stringing plane of the racket. Preferably, at least two openings of this kind are provided essentially symmetrical with respect to the longitudinal axis of the racket at about two o'clock to four o'clock and/or eight o'clock to ten o'clock on the racket head. Particularly preferably, the openings are at about three o'clock and/or nine o'clock. The racket of the present invention thus exhibits particularly advantageous ball control characteristics.
    Type: Application
    Filed: March 30, 2004
    Publication date: July 28, 2005
    Inventors: Johannes Mauser, Klaus Rambach, Manfred Emberger, Johan Kotze, Herfried Lammer