Patents by Inventor Harold D. Parham

Harold D. Parham 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: 4064957
    Abstract: A three-wheel motorcycle having an outer frame with rear wheels mounted on a double axle with differential therebetween for a drive from a powerful automobile type engine together with an inner support frame pivotally mounted from said main outer frame with said inner pivotal frame supporting the front motorcycle type single steerable wheel. Handlebars mounted for four-way movement together with an operator's seat and passenger seats are also supported and mounted on the pivotal frame. A unique hydraulic actuated tilting mechanism is associated with the two frames for semi-automatically tilting the inner pivotal frame and the front wheel, operator and passenger thereon, whenever the operator turns the handlebars in order to make a turn of the vehicle and/or a turn is made which will exert centrifugal force upon the device.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: December 27, 1977
    Inventor: Harold D. Parham
  • Patent number: 4028231
    Abstract: A device for circulating liquid by vacuum, that is carrying two or more particles of different densities. The particles are separated and then discharged through a discharge bowl to separate receptacles, and the liquid is returned for re-use.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: June 7, 1977
    Inventor: Harold D. Parham