Patents by Inventor J. P. Houben

J. P. Houben 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).

  • Apparatus for driving a drilling or percussion tool
    Patent number: 5113951
    Abstract: This invention relates to a device for driving a drilling or percussion tool having a spindle that rotates with respect to a housing. One end of the spindle is adapted to fasten to a tool piece and the other end is connected to an oscillating percussion body movable in the housing by means of a guideway. A drive shaft rotates the tool spindle into rotation or actuates the percussion body via a transmission that is provided with means for converting the rotary motion of the drive shaft into an oscillatory motion of a drive member. The drive member is connected to the percussion body through an elastic member having a non-linear sping characteristic.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: May 19, 1992
    Assignee: Emerson Electric Company
    Inventors: J. P. Houben, A. J. Moolenaar
  • Apparatus for driving a drilling or percussion tool
    Patent number: 5052497
    Abstract: This invention relates to a device for driving a drilling or percussion tool having a spindle that rotates with respect to a housing. One end of the spindle is adapted to fasten to a tool piece and the other end is connected to an osciliating percussion body movable in the housing by means of a guideway. A drive shaft rotates the tool spindle into rotation or actuates the percussion body via a transmission that is provided with means for converting the rotary motion of the drive shaft into an oscillatory motion of a drive member. The drive member is connected to the percussion body through an elastic member having a non-linear spring characteristic.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: October 1, 1991
    Assignee: Emerson Electric Company
    Inventors: J. P. Houben, A. J. Moolenaar
  • Biaxially stretched polypropylene-based plastic products, and process for making such products
    Patent number: 4362844
    Abstract: The invention relates to polypropylene-based plastic products, biaxially stretched below the melting point, wherein the plastic consists substantially of a mixture of 60-95 % by weight of a substantially crystalline propylene polymer and 5-40 % by weight of an ethylene-vinylalcohol copolymer, and to a process for making such products.According to the invention an ethylene-vinylalcohol copolymer is used having a melting point which is at most equal to that of the propylene polymer, preferably 0-20 K below the melting point of the propylene polymer.The invention provides biaxially stretched polypropylene products having an outstandingly good gas impermeability while retaining their good properties in respect of optical clarity, mechanical properties and simplicity of production.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: December 7, 1982
    Assignee: Stamicarbon, B.V.
    Inventors: Pieter J. Lemstra, Marcellus J. P. Houben