Patents by Inventor Robert L. Perkins

Robert L. Perkins 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: 8015715
    Abstract: A chain saw arrangement for cutting flat sides or kerfs on a round log or timber. The arrangement includes a chain saw housing at a first end of the chain saw. An elongated chain/blade supporting frame extends from the chain saw housing. A multi-tooth chain/blade is movably supported from the elongated frame. A support bracket is secured to one side of the elongated frame for providing restricted support of the chain/blade on a log or timber during cutting of a transverse kerf thereon.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: September 13, 2011
    Inventor: Robert L. Perkins
  • Publication number: 20090100977
    Abstract: A chain saw arrangement for cutting flat sides or kerfs on a round log or timber. The arrangement includes a chain saw housing at a first end of the chain saw. An elongated chain/blade supporting frame extends from the chain saw housing. A multi-tooth chain/blade is movably supported from the elongated frame. A support bracket is secured to one side of the elongated frame for providing restricted support of the chain/blade on a log or timber during cutting of a transverse kerf thereon.
    Type: Application
    Filed: October 17, 2007
    Publication date: April 23, 2009
    Inventor: Robert L. Perkins
  • Patent number: 4796895
    Abstract: A seal assembly for use in the high pressure oil supply inlet to an automatic transmission piston includes an outer sleeve and a spring loaded inner sleeve with a lip seal and the top and a compression seal at the bottom. The seal assembly self adjusts for tolerance stack up, and also increases its sealing pressure with the introduction of high pressure oil.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: January 10, 1989
    Assignee: General Motors Corporation
    Inventor: Robert L. Perkins
  • Patent number: 4063475
    Abstract: A lug nut tool for removing lug nuts from vehicle wheels. The tool includes a casing or body which carries a drive shaft which drives a shaft carrying a socket through a gear transmission. The gear transmission has an uneven number of gears and serves to increase or multiply the torque applied at the drive shaft. Another spindle shaft is also rotatably mounted in the casing and carries a socket for engaging an adjacent lug nut to secure and stabilize the tool during use. The device can be driven by a manual wrench or other drive such as a power tool or impact tool.
    Type: Grant
    Filed: December 17, 1975
    Date of Patent: December 20, 1977
    Inventor: Robert L. Perkins