Patents Assigned to DamilerChrysler Corporation
  • Random error generation of tooth index to eliminate pump noise
    Patent number: 6164944
    Abstract: A pump gear for an automatic transmission oil pump having a plurality of teeth. The thickness of each tooth varies randomly from a baseline thickness T.sub.B. Correspondingly, the clearance between each tooth varies randomly between each pair of adjacent teeth. The random variation in tooth thickness prevents the formation of resonant frequencies when the gear pump operates, thereby reducing noise produced by the automatic transmission oil pump.
    Type: Grant
    Filed: March 21, 1999
    Date of Patent: December 26, 2000
    Assignee: DamilerChrysler Corporation
    Inventors: Berthold Martin, Valentin Botosan