Patents Assigned to Turner & Newall PLC
  • Friction materials and their manufacture
    Patent number: 4663368
    Abstract: A non-asbestos clutch facing has an actual density such that the facing is permeable to air. The clutch facing is preferably a moulded facing containing short reinforcing fibres and having an actual density not greater than 90% of theoretical.The facing may be made by a technique in which a pre-form is prepared, moulded to the desired density and then cured under a pressure such as not to cause substantial further density change.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: May 5, 1987
    Assignee: Turner & Newall PLC
    Inventors: John D. Harding, Keith D. Dolbear
  • Friction materials and their manufacture
    Patent number: 4656203
    Abstract: Low density friction products composed of non-asbestos reinforcing fibers embedded in a matrix of binder material, optionally including friction and wear modifiers, are described in which the actual density of the product is less than 72% of the theoretical density. Clutch facings of this density exhibit improved wear characteristics, lower inertia and increased burst strength.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: April 7, 1987
    Assignee: Turner & Newall Plc
    Inventor: Euan Parker
  • Starch bound paper
    Patent number: 4378271
    Abstract: Non-asbestos alternatives to starch-bound asbestos papers comprise a matrix of unfired ball clay which is reinforced by vitreous fibres derived from wool-form materials and by organic web-forming fibres, the whole being bound together by hydrolysed starch.
    Type: Grant
    Filed: October 10, 1980
    Date of Patent: March 29, 1983
    Assignee: Turner & Newall PLC
    Inventors: Brian Hargreaves, Robert A. Lancaster, Brian Healey, Alan K. Cousens