Patents Assigned to Fairey Hydraulics Limited
  • Variable ratio power transmission means
    Patent number: 4630495
    Abstract: There is disclosed a continuously variable ratio power transmission means comprising truncated cones having concave parabolic circumferential surfaces which surfaces are in rolling contact one with another and which can be moved in a linear fashion to provide a variable ratio dependent on point extent of overlap and rolling contact. In a preferred form of the invention positive drive is provided by a rack or band of gear teeth being provided in a helix around the periphery of each cone in a constant helix or lead angle.
    Type: Grant
    Filed: February 9, 1983
    Date of Patent: December 23, 1986
    Assignee: Fairey Hydraulics Limited
    Inventor: John D. Smith
  • Biased pressure feedback module
    Patent number: 4150604
    Abstract: A multiple servo system including two or more servo mechanisms, each having a pressure feed back including two pistons exposed in respective chambers interconnected by a low-pass hydraulic filter, in which the area of the two feedback piston faces differ by up to 25%. This reduces the tendency of the respective actuators to act in opposition and thus increases the service life of the system.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: April 24, 1979
    Assignee: Fairey Hydraulics Limited
    Inventor: Frederick J. Fuell