Pivotal Pin Patents (Class 473/75)
Pivot substantially at base of pin (Class 473/76)
With spring detent (Class 473/77)
  • Pivoting target bowling training apparatus
    Patent number: 5288275
    Abstract: A support shaft arranged in a spaced relationship relative to a bowling lane top surface is arranged to include slidably mounted signal members, wherein the signal members are arranged for rotary displacement upon communication of a bowling ball with a flange portion of each signal member. Indication of bowling ball path to provide for training and correction of such path is thereby enabled.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: February 22, 1994
    Inventor: Gail D. St. Peter