Patents by Inventor Manfred Waltersdorf

Manfred Waltersdorf 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).

  • Hand tool in pliers form for expanding hollow bodies
    Patent number: 6672128
    Abstract: A hand tool for expanding hollow bodies contains a casing (2) having a laterally extending first hand lever (3). A second hand lever, (7) which consists of steel and is joined to the casing so as to pivot on a shaft (5), bears a pinion sector (6) surrounding the shaft (5). The two hand levers (3, 7) form a pliers In the casing (2) a bore is disposed for guiding a rack consisting of steel, one end of which cooperates within the bore with the pinion sector (6) such that an expansion wedge can be displaced outwardly by a closing movement of the two hand levers (3, 7). The casing has means by which an expansion head with radially moving expander jaws can be placed coaxially onto the outwardly tapered end of the spreading wedge. To reduce both the weight and the force required for operation, the casing (2) and its hand lever (3) consist of a light material from the plastic and light metal group. The casing (2) thus forms together with the rack a low-friction combination of light material and steel.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: January 6, 2004
    Assignee: Rothenberger Werkeuge Aktiengesellschaft
    Inventors: Ewald Wagner, Manfred Waltersdorf, Michael Judis
  • HAND TOOL IN PLIERS FORM FOR EXPANDING HOLLOW BODIES
    Publication number: 20030226390
    Abstract: A hand tool for expanding hollow bodies contains a casing (2) having a laterally extending first hand lever (3). A second hand lever, (7) which consists of steel and is joined to the casing so as to pivot on a shaft (5), bears a pinion sector (6) surrounding the shaft (5). The two hand levers (3, 7) form a pliers In the casing (2) a bore is disposed for guiding a rack consisting of steel, one end of which cooperates within the bore with the pinion sector (6) such that an expansion wedge can be displaced outwardly by a closing movement of the two hand levers (3, 7). The casing has means by which an expansion head with radially moving expander jaws can be placed coaxially onto the outwardly tapered end of the spreading wedge. To reduce both the weight and the force required for operation, the casing (2) and its hand lever (3) consist of a light material from the plastic and light metal group. The casing (2) thus forms together with the rack a low-friction combination of light material and steel.
    Type: Application
    Filed: September 4, 2002
    Publication date: December 11, 2003
    Inventors: Ewald Wagner, Manfred Waltersdorf, Michael Judis
  • Hand tool for compressing pipes or pipe connectors
    Patent number: D468604
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: January 14, 2003
    Assignee: Rothenberger Werkzeuge Aktiengesellschaft
    Inventors: Markus Weber, Gerhard Goldbach, Manfred Waltersdorf