Patents by Inventor John W. Hogan

John W. Hogan 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).

  • Patent number: 7729089
    Abstract: A head-gimbal assembly (HGA) is disclosed. The HGA comprises a head including a slider having a leading end and a trailing end that define a slider length. The head further includes a read transducer disposed at the trailing end. The HGA further comprises an adhesive material and a flexure that includes a tongue to which the head is adhered. The tongue includes three stand-offs in contact with the slider, each of the three stand-offs spanning a stand-off length that is one-half the slider length or less. Two of the three stand-offs are disposed adjacent the leading end.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: June 1, 2010
    Assignee: Western Digital Technologies, Inc.
    Inventor: John W. Hogan
  • Patent number: 5295930
    Abstract: An exercise device that simulates downhill skiing as well as thoroughly exercises one's body and cardiovascular system comprises a base support member that rests on the floor or ground. An elongate support member is pivotally attached to the base support member for pivotal, swaying movement about a longitudinal axis adjacent to the base support member. A biasing mechanism is associated with the elongate support member for exerting a biasing force to bias the elongate support member toward an upstanding position. A platform for supporting a person in a standing position thereon is pivotally attached to a distal end of the elongate support member. As the elongate support member sways back and forth, the platform moves in an arcuate, swinging motion.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: March 22, 1994
    Inventor: John W. Hogan
  • Patent number: 5245494
    Abstract: A write-read magnetic head for write-read digital recording machines includes a write magnetic head and a read magnetic head disposed in closely spaced apart relation. Each head includes a shield formed of a ferrous containing material having an opening therein in which the primary (write or read) gap is positioned. Each head includes a magnetic core comprised of a C-shaped core element and on I-shaped core element defining the primary (write) gap. A secondary gap is defined between the I-shaped core element and adjacent wall edge downstream of the write gap. When the recording head is energized, the shields and the secondary flux reduces flux leakages towards the read gap to permit effective reading while writing.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: September 14, 1993
    Inventors: John W. Hogan, Rolf W. Hogan
  • Patent number: 3936884
    Abstract: A magnetic tape head includes a pair of core holders containing the core elements of magnetic cores. The tips of the magnetic cores are urged towards each other when the core holders are clamped in abutting relation by a metallic U-shaped clip. The bight portion of the clip engages the tips of the magnetic cores and engages the inner surface of the metallic housing in which the core holders are positioned to ground the tips of the cores. The legs of the clip are urged inwardly with a scissors action by engagement with the inner surfaces of the housing to further exert a clamping action on the core holders and to thereby urge the tips of the core elements towards each other so that the flux gap is maintained.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: February 3, 1976
    Assignee: MagTech Industries, Inc.
    Inventor: John W. Hogan