Patents by Inventor Graham Durtnal

Graham Durtnal 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: 4791696
    Abstract: A windscreen wiper system comprises a drive shaft (1), a windscreen wiper arm (2) mounted at one end (3) on the drive shaft (1) for reciprocal pivotal movement therewith and a windscreen wiper blade (9) articulated to the other end (4) of the arm (2). A link (6) extending substantially at right angles to the surface of the windscreen is pivotally connected to both the arm (2) and the blade (9) so as to provide an articulated connection therebetween and a control lever (12) is pivotally connected at one end to the link (6) between the pivots for the arm (2) and the blade (9). A cam surface (15) is associated with the drive shaft (1) and a cam follower (16) is provided for cooperation with the cam surface (15) and mounted on the other end (11) of the control lever (12).
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: December 20, 1988
    Inventor: Graham Durtnal
  • Patent number: 4347640
    Abstract: A connector assembly, for use in connecting a wiper arm and a wiper blade for pivotal movement of the blade in relation to the arm about a common axis which in use is substantially perpendicular to the surface to be wiped, comprises two basic parts, namely a first part (11) for attachment to the wiper arm and a second part (12) for attachment directly or indirectly to the wiper blade, the parts being pivotally connected together for relative angular movement about the common axis (13). The assembly includes a discrete element (33) arranged for rotation about the common axis in relation to one of the parts (11) and there are two first abutment faces (31, 32) on that part (11), and two second abutment faces (36, 37) on the discrete element, the second faces being arranged to co-operate with the respective first faces to limit the range of relative angular movement of the two parts (11, 12) about the common axis.
    Type: Grant
    Filed: October 30, 1980
    Date of Patent: September 7, 1982
    Assignee: Trico Products Corporation
    Inventor: Graham Durtnal