Patents by Inventor Mark D Crabbe

Mark D Crabbe 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).

  • Vibratory separator
    Patent number: 6412644
    Abstract: A vibratory separator for separating components of material introduced to the vibratory separator, the vibratory separator including a basket for holding screening apparatus, the basket having two sides spaced-apart by a first end at which the material is introduced into the basket and a second end spaced-apart from the first end, certain components separated from the material exiting the basket from the second end, vibrating apparatus connected to the basket for vibrating the basket, screening apparatus mounted in the basket, the screening apparatus having at least a first portion and a second portion, the first portion lower in the basket than the second portion, and receptacle apparatus below the screening apparatus for receiving material components flowing through the screening apparatus.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: July 2, 2002
    Assignee: Varco I/P, Inc.
    Inventors: Mark D Crabbe, David L. Schulte, Charles N. Grichar
  • Wrist band
    Patent number: D349387
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: August 9, 1994
    Inventor: Mark D. Crabbe