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Utility knife

  • US 4,868,985 A
  • Filed: 12/28/1987
  • Issued: 09/26/1989
  • Est. Priority Date: 01/01/1987
  • Status: Expired due to Term
First Claim
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1. A utility knife comprising a handle housing having an upper and lower edge (32);

  • a slide mounted within said housing for longitudinal displacement;

    a knife blade having a cutting edge and connected to said slide;

    retraction means (18) located within said housing for retracting said slide and said knife blade (16) from a cutting position into a protected position in the handle housing;

    a friction disk (22) turnably mounted within said handle housing (10) and extending out of said handle housing (10) on said cutting-edge side of said knife blade (16);

    the axis of rotation (24) of said friction disk extending substantially perpendicularly to the plane of said blade; and

    a driver member for advancing said slide (12) together with said knife blade (16) into the cutting position thereof against the force of the retraction means (18).

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