Patents Assigned to PSI, Inc.
  • Safety utility knife
    Patent number: 5426855
    Abstract: An improved safety utility knife has a hollow handle and a blade which is normally retracted within the handle, but can be extended by squeezing an operating lever. The lever is connected to the blade holder by a toggle linkage having a rearmost pin secured in a discrete support whose position is adjustable. A thumbscrew threaded into the support enables one to adjust the position of the support from outside the handle, and thus change how far the blade protrudes from the handle when the operating lever is fully depressed.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: June 27, 1995
    Assignee: PSI, Inc.
    Inventors: Ronald Keklak, Michael V. Couture, John C. Whitehouse
  • Safety utility knife
    Patent number: 5303474
    Abstract: An improved safety utility knife has a hollow handle and a blade which is normally retracted within the handle, but can be extended by squeezing an operating lever. The lever is connected to the blade holder by a toggle linkage having a rearmost pin secured in a discrete support whose position is adjustable. A thumbscrew threaded into the support enables one to adjust the position of the support from outside the handle, and thus change how far the blade protrudes from the handle when the operating lever is fully depressed.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: April 19, 1994
    Assignee: PSI, Inc.
    Inventors: Ronald Keklak, Michael V. Couture, John C. Whitehouse