Screw And Nut Patents (Class 74/424.71)
Plural longitudinally variably spaced nuts (Class 74/424.72)
Threadless (Class 74/424.73)
Non-linear screw (Class 74/424.74)
Thread geometry (Class 74/424.75)
Nut disengageable from screw (Class 74/424.78)
Rolling element engaging thread (Class 74/424.81)
Less than 360 degrees of contact between nut and screw (Class 74/424.94)
  • Feed screw device
    Patent number: 6338285
    Abstract: A ring-like lubricant supply device 6 is fitted into a recess 4 of a nut member 2. The lubricant supply device 6 contains a lubricant and is formed in an outer peripheral surface with notches 7. Tubular members 8 each having an outer diameter larger than the diameter of the notch 7 are inserted into the notches, pushing and widening the notches 7 in a circumferential direction. One end of the tubular member 8 is fitted into a recess 9b of a retaining ring 9 and the retaining ring 9 is fixed to a nut member 2.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: January 15, 2002
    Assignee: NSK Ltd.
    Inventors: Toru Tsukada, Soichiro Kato