Patents Assigned to IMI Yorkshire Fittings Limited
  • Potable water supply components
    Patent number: 5919519
    Abstract: A method of treating a potable water supply component, for example a pipe, pipe coupling or tap body, made of a leaded copper-based alloy such as a brass or gun metal, in order to inhibit the leach out of lead from the alloy by potable water during service, comprises treating at least internal surfaces of the component with an aqueous solution of an acid that forms a substantially water insoluble compound with lead. The acid is preferably ortho-phosphoric acid.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: July 6, 1999
    Assignee: IMI Yorkshire Fittings Limited
    Inventor: Colin E Tallis
  • Cu--Sn--Zn--Bi alloys
    Patent number: 4879094
    Abstract: An alloy for the manufacture of cast components, for example taps, water meters, pipe couplings and parts thereof, intended for use in potable water supply installations comprises 1.5 to 7 wt % bismuth, from 5 to 15 wt % zinc, from 1 to 12 wt % tin, the balance apart from any impurities and any minor amounts of elemental additives being copper.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: November 7, 1989
    Assignee: IMI Yorkshire Fittings Limited
    Inventor: William Rushton