Patents by Inventor Dennis E. Bender

Dennis E. Bender 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: 4841593
    Abstract: This cleaning device utilizes two methods, simultaneously, to remove deposits from the conduction channel inside a multitude of various shaped tubes or the like, including round, square, and rectangular chimney flues. The first removes soft, brittle deposits and the second removes hard, glazed deposits through the use of chisel-like edges (35) and file-like grooved rasping surfaces (34) that are integrated in one element, the raspers (30). Raspers (30) can be replaced when dull. This device is well suited for removing creosote deposits from chimney flues; it can go past unyielding obstructions commonly found in chimney flues, and it cleans all surfaces in a section of flue simultaneously.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: June 27, 1989
    Inventors: Dennis E. Bender, Mark Bender