Patents by Inventor Erik Zaaijer

Erik Zaaijer 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).

  • Load-measuring bearing unit
    Patent number: 8887581
    Abstract: A bearing unit (20) for measuring forces exerted on the bearing unit, comprising an inner member (3) concentrically arranged around an outer member (2), at least one rolling element bearing (4, 5) and at least one load measuring device (8, 9) with a cylindrical bore. The load measuring device (8, 9) is mounted to one of the members (3) and supports the rolling element bearing (4, 5) relatively to this member (3). The rolling element bearing (4, 5) is mounted to the other of the members (2) and supports this member (2) relatively to the load measuring device (8, 9). Thus, a force acting on the bearing unit is transferred from one of the inner and outer members (2, 3) to the other of the inner and outer members (2, 3) via the at least one load measuring device (8, 9). According to the invention, the at least one load measuring device (8, 9) and the at least one rolling element bearing (4, 5) are arranged laterally to each other in a radial gap between the inner and outer members (2, 3).
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: November 18, 2014
    Assignee: Aktiebolaget SKF
    Inventors: Erik Zaaijer, Cornelius Petrus Antonius Vissers
  • LOAD-MEASURING BEARING UNIT
    Publication number: 20120128287
    Abstract: A bearing unit (20) for measuring forces exerted on the bearing unit, comprising an inner member (3) concentrically arranged around an outer member (2), at least one rolling element bearing (4, 5) and at least one load measuring device (8, 9) with a cylindrical bore. The load measuring device (8, 9) is mounted to one of the members (3) and supports the rolling element bearing (4, 5) relatively to this member (3). The rolling element bearing (4, 5) is mounted to the other of the members (2) and supports this member (2) relatively to the load measuring device (8, 9). Thus, a force acting on the bearing unit is transferred from one of the inner and outer members (2, 3) to the other of the inner and outer members (2, 3) via the at least one load measuring device (8, 9). According to the invention, the at least one load measuring device (8, 9) and the at least one rolling element bearing (4, 5) are arranged laterally to each other in a radial gap between the inner and outer members (2, 3).
    Type: Application
    Filed: June 2, 2010
    Publication date: May 24, 2012
    Inventors: Erik Zaaijer, Cornelius Petrus Antonius Vissers
  • Bearing assembly with a strain sensor
    Patent number: 7685890
    Abstract: A bearing and shaft assembly comprises a shaft and at least one bearing, and is provided with at least one strain sensor. An elastic component is provided between the shaft and the at least one bearing, and the elastic component comprises the at least one strain sensor. In one disclosed embodiment, the elastic component forms an integral part with one of the bearing and the shaft.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: March 30, 2010
    Assignee: AB SKF
    Inventors: Henk Mol, Erik Zaaijer, Fabio Falsetti, Carl Vissers
  • Bearing Assembly with a Strain Sensor
    Publication number: 20090000399
    Abstract: A bearing and shaft assembly comprises a shaft and at least one bearing, and is provided with at least one strain sensor. An elastic component is provided between the shaft and the at least one bearing, and the elastic component comprises the at least one strain sensor. In one disclosed embodiment, the elastic component forms an integral part with one of the bearing and the shaft.
    Type: Application
    Filed: October 11, 2006
    Publication date: January 1, 2009
    Applicant: AB SKF Group Headquarters
    Inventors: Henk Mol, Erik Zaaijer, Fabio Falsetti, Carl Vissers
  • Measurement device for measuring radial and/or axial forces
    Patent number: 6920801
    Abstract: Measurement device (1) for measuring the axial and/or radial load on a bearing (10) comprising an inner ring (11), an outer ring (12) and a plurality of rolling elements (13) between the inner and outer ring. The measurement device (1) comprises a sensor ring (3) which may be positioned adjacent to and in close contact with the inner ring (11) or outer ring (12) of the bearing (10), the sensor ring (3) having at least one weakening (2) at its circumference and at least one sensor (5) being positioned in the at least one weakening (2).
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: July 26, 2005
    Assignee: SKF Engineering and Research Centre B.V.
    Inventors: Bernardus Gerardus Van Leeuwen, Eduardus Gerardus Maria Holweg, Frank Wit, Erik Zaaijer, Simon Ballegooij
  • Measurement device for measuring radial and/or axial forces
    Publication number: 20040261543
    Abstract: Measurement device (1) for measuring the axial and/or radial load on a bearing (10) comprising an inner ring (11), an outer ring (12) and a plurality of rolling elements (13) between the inner and outer ring. The measurement device (1) comprises a sensor ring (3) which may be positioned adjacent to and in close contact with the inner ring (11) or outer ring (12) of the bearing (10), the sensor ring (3) having at least one weakening (2) at its circumference and at least one sensor (5) being positioned in the at least one weakening (2).
    Type: Application
    Filed: June 23, 2003
    Publication date: December 30, 2004
    Inventors: Bernardus Gerardus Van Leeuwen, Eduardus Gerardys Maria Holweg, Frank Wit, Erik Zaaijer, Simon Ballegooij