Patents by Inventor Darrell G. Stack

Darrell G. Stack 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).

  • Plunge cutting device and method for pipes
    Patent number: 5314270
    Abstract: A plunge cutting device for plastic pipe, pipe couplings, plastic flanges and other planar members includes a cylindrical body including slots formed therein, a pilot for guiding the cylindrical body, and cutters adjustably mounted in the slots. A canted relief is formed in the cylindrical body adjoining the leading wall of each slot to facilitate ejection of cut shavings. The pilot may comprise a main pilot and an auxiliary pilot detachably connected to the main pilot. The auxiliary pilot can be replaced with one of a different diameter in accordance with the dimensions of a pipe being processed with the device.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: May 24, 1994
    Inventors: Wayne N. Lavancy, Darrell G. Stack
  • Plunge cutting device and method for plastic pipe members such as pipe couplings, flanges, hubs, and the like
    Patent number: 5304018
    Abstract: A universal plunge cutter for plastic pipe, pipe couplings, plastic flanges and other planar members, is provided. The plunge cutter has a cylindrical body supporting cutters, a drive shaft, a pilot mandrel for guiding the cylindrical body. The cutters are adjustably mounted in cutter slots formed in the cylindrical body so that the cutters present forwardly facing cutting edges which lie skewed relative to a radius of the cylindrical body. A method for the use of the plunge cutter is also provided.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: April 19, 1994
    Inventors: Wayne N. LaVanchy, Darrell G. Stack