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Guide-wire steered variable incision width safety scalpel

  • US 20050177183A1
  • Filed: 02/09/2004
  • Published: 08/11/2005
  • Est. Priority Date: 02/09/2004
  • Status: Abandoned Application
First Claim
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1. A planar, split scalpel blade element for producing an incision having a predetermined width and a predetermined, substantially constant, predetermined depth, said blade element comprising:

  • two juxtaposed elongated components aligned in a first plane with each component split away from the other component along a medial second plane which is orthogonal to the first plane, when medially aligned, said components jointly forming a distally disposed piercing end and comprising a common hinged joint aligned with the second plane at a proximal end;

    a first component of the two components comprising a first knife blade at the piercing end, which is sharpened to be effective as a piercing and transverse cutting tool, and an inwardly disposed elongated first edge which is angularly displaced relative to the second plane to thereby provide a guide by which the piercing end of the component is skewed away from the second plane as a part of an actuator is displaced there along in a direction substantially parallel to the second plane toward the piercing end;

    a second component of the two components comprising a second knife blade at the piercing end, which is sharpened to be effective as a piercing and transverse cutting tool, and an inwardly disposed elongated second edge which is angularly displaced relative to the second plane to thereby provide a guide by which the piercing end of the component is skewed away from the second plane as a part of an actuator is displaced there along in a direction substantially parallel to the second plane toward the piercing end;

    the first and second component each comprising a third and fourth edge, respectively, each third and fourth edge being respectively disposed transversely outward from said first edge and second edge, each third and fourth edge comprising an elongated substantially straight length which is substantially parallel to the second plane when the components are juxtaposed and aligned with the second plane to thereby provide a pair of guides which interact with associated side stops which are fixed relative to blade movement and which obstruct sideways displacement of the first and second components thereby causing each actuator part and blade component to move distally as a unit without outward skewing of the first and second components until the blade element is distally displaced to the predetermined depth;

    said first component further comprising a first wing defined by a first distal edge outwardly disposed between a proximal segment of said first knife blade and the distal end of the straight length of the third edge, said first wing further comprising a first arcuate, concave edge which is joined to a proximal end of the third edge, the first distal edge providing an interface against an associated distal stop which limits forward displacement of the first component whereat the first concave edge is disposed to provide relief from the associated side stop of the third edge to thereby permit outward skewing of the first component as the actuator part continues to be distally displaced and thereby skew the first knife blade outward, away from the second plane, to widen the incision to the portion of the predetermined width formed by the first component of the blade; and

    said second component further comprising a second wing defined by a second distal edge outwardly disposed between a proximal segment of said second knife blade and the distal end of the straight length of the fourth edge, said second wing further comprising a second arcuate, concave edge which is joined to a proximal end of the fourth edge, the second distal edge providing an interface against an associated distal stop which limits forward displacement of the second component whereat the second concave edge is disposed to provide relief from the associated side stop of the fourth edge to thereby permit outward skewing of the second component as the actuator part continues to be distally displaced and thereby skew the second knife blade outwardly away from the first knife blade to widen the incision to the portion of the predetermined width formed by the second component of the blade.

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