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Rideless scissors with an adjustable load transverse to the pivot axis on a pivot joint

  • US 5,440,813 A
  • Filed: 06/04/1993
  • Issued: 08/15/1995
  • Est. Priority Date: 06/04/1993
  • Status: Expired due to Fees
First Claim
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1. A scissors comprising:

  • a pivot joint including a substantially frictionless sealed bearing assembly, said pivot joint having a pivot axis and a diameter;

    a securing member;

    a first blade member having a first cutting edge and a longitudinal axis, the first blade member further having a pivot joint hole defined therein, the pivot joint hole being oversized with respect to the diameter of the pivot joint in a direction along the longitudinal axis of the first blade member, and the securing member being coupled to the first blade member and contacting a portion of the pivot joint; and

    a second blade member having a second cutting edge, the second blade member being pivotally coupled by the pivot joint to the first blade member with the first cutting edge adjacent to the second cutting edge, the pivot joint being coupled to the first blade member through the pivot joint hole in the first blade member, the pivot joint being secured in the pivot joint hole by the securing member in an inclined orientation relative to the first blade member in the direction along the longitudinal axis of the first blade member, the inclined orientation of the pivot joint maintained by the securing member causing the first blade member to incline relative to the second blade member and the pivot joint, wherein inclining the first blade member relative to the pivot joint and the second blade member produces a load transverse to the pivot axis of the pivot joint corresponding to the direction along the longitudinal axis of the first blade member, wherein the load transverse to the pivot axis inclines and forces the first cutting edge into contact with the second cutting edge to produce tension and friction between the first and second cutting edges; and

    wherein the first blade member further includes a first ride area on a side of the pivot joint opposite the first cutting edge of the first blade member, and wherein the second blade member further includes a second ride area on a side of the pivot joint opposite the second cutting edge of the second blade member such that when the first blade member is pivotally coupled to the second blade member the first ride area and the second ride area are on the same side of the pivot joint, and wherein the inclined orientation of the pivot joint with respect to the first blade member maintained by the securing member causes the first ride area to separate away from contact with the second ride area such that the first ride area is spaced apart from and free of contact with the second ride area.

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