Patents by Inventor John William Huffman

John William Huffman 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).

  • Printer imaging components protection apparatus and method
    Patent number: 6873811
    Abstract: A printer with an imaging components protection architecture includes a main housing and a protective housing that is pivotally coupled to the main housing. The protective housing is formed to receive an intermediate transfer belt (ITB) positioned between the protective housing and a print cartridge that is also positioned within the protective housing.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: March 29, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: John William Huffman, David M. Payne
  • Printer imaging components protection apparatus and method
    Publication number: 20040213599
    Abstract: A printer with an imaging components protection architecture includes a main housing and a protective housing that is pivotally coupled to the main housing. The protective housing is formed to receive an intermediate transfer belt (ITB) positioned between the protective housing and a print cartridge that is also positioned within the protective housing.
    Type: Application
    Filed: April 28, 2003
    Publication date: October 28, 2004
    Inventors: John William Huffman, David M. Payne
  • Pressure sensitive electrical switch having a snap element
    Patent number: 4091249
    Abstract: A pressure sensitive electrical switch has a monostable snap disc which is deformed in response to the application of sufficient force. A pressure reducer transmits a force proportional to the pressure of a fluid. The reducer has an annular force transmitting ring which applies force to the snap disc along a circle which is substantially concentric with the disc. By changing the force reducer in a switch to one having a different diameter ring, the operating characteristics of the switch may be changed.
    Type: Grant
    Filed: October 6, 1976
    Date of Patent: May 23, 1978
    Assignee: Emerson Electric Co.
    Inventor: John William Huffman