Patents by Inventor Wilhelmus Cornelis Henricus Maria Rijkers

Wilhelmus Cornelis Henricus Maria Rijkers 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).

  • Vibrating screed and method of making same
    Patent number: 6322286
    Abstract: A vibrating screed for processing a floor layer, more particularly a so-called vibrating beam, of the type including a vibrating board (2), a vibrating mechanism (3) cooperating with the vibrating board, and a handle (4) whereby the vibrating mechanism comprises an eccentric (7) seated in bearings (5-6) and a motor (8) for driving the eccentric, wherein the bearings and the eccentric are fixed in a split body by means of a clamping mechanism on the split body.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: November 27, 2001
    Assignee: B-Mac besloten vennootschap met beperkte aanspralijkheid
    Inventor: Wilhelmus Cornelis Henricus Maria Rijkers
  • Vibrating device for processing a floor layer
    Patent number: 6293780
    Abstract: A vibrating device for processing a floor layer. The device includes a vibrating board, a vibrating mechanism and a handle. The handle is attached to the vibration board with at least one clamping coupling. The clamping coupling includes at least two connecting elements, each having conical parts wherein one of the conical parts is adapted to fit within another of the conical parts. The clamping coupling further includes a tensioning device that is arranged to axially tighten the conical parts against each other.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: September 25, 2001
    Assignee: B-Mac, besloten vennootschap met beperkte aansprakelijkheid
    Inventor: Wilhelmus Cornelis Henricus Maria Rijkers