Patents by Inventor Howard G. Coleman

Howard G. Coleman 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).

  • Separable blade agitator assembly and disassembly method
    Patent number: 4314396
    Abstract: A separable blade agitator has a glass coated drive shaft and a glass coated impeller interference fitted to the end of the shaft in a gasketless, glass surface to glass surface joint. The interference fitting of the impeller to the shaft is accomplished by super cooling the end of the shaft with nitrogen or the like so that it can be inserted into a glass coated bore in the impeller.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: February 9, 1982
    Assignee: Sybron Corporation
    Inventors: Erwin J. Nunlist, Howard G. Coleman, Edward S. Harrison
  • Separable blade agitator and method and means for assembly
    Patent number: 4221488
    Abstract: A separable blade agitator has a glass coated drive shaft and a glass coated impeller interference fitted to the end of the shaft in a gasketless, glass surface to glass surface joint. The interference fitting of the impeller to the shaft is accomplished by super cooling the end of the shaft with nitrogen or the like so that it can be inserted into a glass coated bore in the impeller.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: September 9, 1980
    Assignee: Sybron Corporation
    Inventors: Erwin J. Nunlist, Howard G. Coleman, Edward S. Harrison