Patents Assigned to Formflo Ltd.
  • Gear wheels rolled from powder metal blanks and method of manufacture
    Patent number: 5711187
    Abstract: A gear wheel is formed from a pressed and sintered powder metal blank in which the metal powder comprises an admixture of iron powder and at least one alloying addition and the gear wheel is surface hardened by densifying at least the tooth root and flank regions to establish densification in the range of 90 to 100 percent of full theoretical density to a depth of at least 380 and up to about 1,000 microns.
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: January 27, 1998
    Assignee: Formflo Ltd.
    Inventors: Christopher John Cole, Rohith Shivanath, Peter Jones