Patents by Inventor Donald S. Allen

Donald S. Allen 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: 6019328
    Abstract: A stay-put pegboard accessory with a support member/s, having "L" hook/s, fastened to restraining member/s consisting of vertical restraint/s having either a short or a long stub. The "L" hook/s is inserted into an aperture opening of a pegboard with the support member/s carrying the load of a tool or object. Any force acting on the support member/s while removing the load will be resisted with the "L" hook/s and the restraining member/s preventing the stay-put pegboard accessory from being pulled off the pegboard. The short or long stub on the restraining member/s will prevent any twisting of the support member. The long stub on the restraining member will resist an upward force on the load support.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: February 1, 2000
    Inventor: Donald S. Allen
  • Patent number: 5473998
    Abstract: A cement kiln having a tire injection system. The tire injection system comprises an entrance chute having an outer end portion protruding outwardly of a wall of the kiln and an inner end portion which protrudes into the kiln. The entrance chute further is disposed such that it is positioned tangentially to the kiln wall. The entrance chute includes a gate assembly having a cam follower assembly and a pivotally mounted gate member. The cam follower assembly causes the gate member to be urged pivotally between open and closed positions in response to movement of the cam follower assembly over a cylindrical camming wall positioned at a predetermined location relative to the kiln. When the cam follower assembly has caused the gate member to open, a plurality of tires or other items forming a source of supplemental fuel are injected into the entrance chute by one or more external tire injecting apparatuses synchronized in operation to rotation of the kiln.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: December 12, 1995
    Assignee: Holnam, Inc.
    Inventors: Donald S. Allen, Verne A. Stuessy, John R. Buta, Ronald F. Teal
  • Patent number: 4140350
    Abstract: An improved nozzle for unloading dry bulk particulate material by suction through the nozzle. A transport medium such as air is drawn by the suction to mix with and thus fluidize the material so that the material may be drawn up through the nozzle. The nozzle is tapered at its first or intake end to cut down on dust emission. The nozzle is of substantially constant internal cross sectional area between its first and second ends to provide the most efficient operation. The nozzle is self regulating in that the suction together with the volume of dry bulk particulate material determine the amount of air needed to fluidize and transport the material.
    Type: Grant
    Filed: September 14, 1977
    Date of Patent: February 20, 1979
    Assignee: Dundee Cement Company
    Inventors: Ib Bentzen-Bilkvist, Donald S. Allen