Patents by Inventor Donald John Duffek

Donald John Duffek 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).

  • Power tool trigger
    Patent number: 7015409
    Abstract: A trigger assembly and a power tool. The trigger assembly includes a housing and a trigger. The trigger is movably supported by the housing and includes a support portion and a contact portion. The housing includes an opening, and the support portion at least partially extends into the opening. In some aspects and in some constructions, the support portion has a first width, and the contact portion has a second width, the second width of the contact portion being greater than the first width of the support portion. The trigger includes an upper protrusion that may prevent the operator's finger from being pinched between the trigger and the housing. The trigger may include an angled portion extending between the support portion and the contact portion on opposite sides of the trigger. The angled portion may include multiple ribs defining grooves between the ribs.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: March 21, 2006
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Donald John Duffek, Scott Robert Fischer, David Brian Griep
  • Power tool trigger
    Publication number: 20040149553
    Abstract: A trigger assembly and a power tool. The trigger assembly includes a housing and a trigger. The trigger is movably supported by the housing and includes a support portion and a contact portion. The housing includes an opening, and the support portion at least partially extends into the opening. In some aspects and in some constructions, the support portion has a first width, and the contact portion has a second width, the second width of the contact portion being greater than the first width of the support portion. The trigger includes an upper protrusion that may prevent the operator's finger from being pinched between the trigger and the housing. The trigger may include an angled portion extending between the support portion and the contact portion on opposite sides of the trigger. The angled portion may include multiple ribs defining grooves between the ribs.
    Type: Application
    Filed: December 22, 2003
    Publication date: August 5, 2004
    Inventors: Donald John Duffek, Scott Robert Fischer, David Brian Griep
  • Trigger for a power tool
    Patent number: D535862
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: January 30, 2007
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Donald John Duffek, Scott Robert Fischer, David Brian Griep