Patents by Inventor Arthur J. Treff

Arthur J. Treff has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Disc drive assembly for magnetic disc memory unit
    Patent number: 4965686
    Abstract: A disc drive assembly for a magnetic disc memory unit is presented. The disc drive assembly has a stationary spindle to which a motor stator assembly is fastened by a wedge ring structure. The motor rotor assembly is constituted by a rotary hub mounted around the stator, the hub having a motor magnet mounted therein. A plurality of magnetic discs may be mounted on the exterior of the hub.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: October 23, 1990
    Assignee: Raymond Engineering Inc.
    Inventors: Paul R. Young, David W. Richard, Arthur J. Treff, Christopher E. Staehly
  • Tape transport cartridge
    Patent number: 4832283
    Abstract: A tape transport cartridge is presented having a pair of brakes for the drive belt, the brakes being positioned to increase the angle of separation of the drive belt from the magnetic tape. This increased angle of separation results in improved drive of the tape, and the dual brake arrangement also establishes a more nearly constant instantaneous velocity differential for the tape packs, resulting in a lower and more constant tape tension.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: May 23, 1989
    Assignee: Raymond Engineering Inc.
    Inventors: Arthur J. Treff, Donald R. Spaman