Patents by Inventor Robert D. Goodfellow

Robert D. Goodfellow 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).

  • Rotary cutter assembly
    Patent number: 4630693
    Abstract: A rotary cutter assembly employs a wear sleeve to improve the durability of the drill head and to seal off a fluid passageway in the shank of a drill bit which is mounted to the drill head. The shank of the drill bit is releasably secured to the drill head by means of lock pins received in intersecting complementary longitudinally and transversely extending grooves. A lock ring is also employed to axially secure the drill bit to the drill head.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: December 23, 1986
    Inventor: Robert D. Goodfellow
  • Rotary cutter assembly
    Patent number: 4610318
    Abstract: A rotary cutter assembly comprises a drill head having a plurality of receptacles which releasably receive rolling cutter bit assemblies. The bit assemblies are locked in position by a locking sleeve connecting transverse fluid passageways of the drill head and bit assembly. Radially locking means in the form of pins received in complementary slots parallel to the rotational axis of the rotary cutter assembly are also provided.
    Type: Grant
    Filed: February 15, 1984
    Date of Patent: September 9, 1986
    Inventor: Robert D. Goodfellow
  • Rotary cone cutter
    Patent number: 4335794
    Abstract: A multi-cone roller bit with a central pot member is disclosed, having releasably secured legs carrying rolling cutters mounted on the pot. The legs have an upper portion which can be releasably secured in a recessed central portion of the pot and an abutment region which contacts the pot. A tongue and groove arrangement holds the leg and pot from relative movement with one another, and a central tapered plug is reciprocably movable so as to clamp and unclamp the legs to the pot.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: June 22, 1982
    Assignee: Kennametal Inc.
    Inventor: Robert D. Goodfellow