Patents Assigned to RHP Group PLC
  • Devices for converting rotary movement to linear movement
    Patent number: 4722236
    Abstract: A device for convering rotary to linear motion is composed of at least one ring surrounding a shaft or tube with balls running in a part-helical track in the ring or shaft. The balls are radially pre-loaded and a slot intersects the end and the start of the track to provide punctiform ball contact zones. One ball is then transferred at a time free of load from the end to the start of the track as the ring rotates. Side covers have profiles on their inner surfaces to control laterally the ball being transferred.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: February 2, 1988
    Assignee: RHP Group Plc
    Inventor: Ronald A. E. Wood
  • Devices for converting rotary movement into linear movement
    Patent number: 4718291
    Abstract: A device is composed of relatively rotatable cylindrical components one of which has a groove forming a raceway or track of part-helical form containing a set of balls in contact with a plain surface of the other component. The raceway wedges with the balls to resist direct axial motion between the components. Rotation of one component causes the balls to move around the raceway and be guided from the end to the start thereof under sufficient traction to cause linear motion of the other component.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: January 12, 1988
    Assignee: RHP Group PLC
    Inventors: Ronald A. E. Wood, Edward Godson, Harold E. Flory
  • Ball bearing rings
    Patent number: 4643595
    Abstract: An outer metallic ball-bearing ring has a ball-locating raceway on its inner bore. At least one sharply defined part pyramidal notch in a land of the bore of the ring projects inwardly from one side face of the ring terminating adjacent the raceway. A full complement of balls can be assembled in the raceway by splitting the ring as is known and the notch ensures the ring fractures along a defined axial plane when exposed to controlled force.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: February 17, 1987
    Assignee: RHP Group PLC
    Inventor: Brian K. Weavers