Surgical scissor blade and method for making the same
AssigneeInnovasive Devices, Inc.
InventorRickey D. Hart
Life of this patent
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Abstract
A novel surgical scissor blade having a sharp shearing edge and comprising an injection molded powdered metal, and a method for making the same.
Claims11
A surgical scissor blade comprising a sharp shearing edge, said shearing edge and a remainder of said blade comprising one unitary and integral molded body composed of an injection molded and hydrogen sintered powdered metal selected from a group consisting of stainless steel, titanium-aluminum alloy, and aluminum, of particle size of about 15 microns, said blade being shrunken from a pre-sintered configuration to a smaller sintered configuration, said blade shearing edge formed by said molding and said sintering being devoid of burrs.
A surgical scissor blade comprising shearing means for shearing tissue, said shearing means being a portion of an injection molded unitary body, said body composed of powdered metal selected from a group consisting of stainless steel, titanium-aluminum alloy, and aluminum, of particle size of about 15 microns, a binder selected from a group consisting of at least one of paraffin wax, polypropylene, and carnauba wax, and additives including at least one of stearic acid and a plasticiser, said shearing means comprising a shearing edge formed by the injection molding and devoid of burrs.
A unitary surgical scissor blade comprising a body portion having inner and outer surfaces and including engagement means at a proximal end thereof;
- a spring arm portion integral with and extending from a distal end of said body portion, said spring arm portion including inner and outer surfaces and having a cross-section less than said body portion;
- and
- a blade portion integral with and extending from a distal end of said spring arm portion, said blade portion comprising an inner surface and a blade face in spaced apart, confronting relationship, said inner surface and said blade face meeting in a linearly-extending shearing edge;
- wherein said unitary scissor blade is composed of a sintered powdered metal and said spring arm portion of said unitary blade provides all of a spring bias exhibited by said blade when in combination with a second similar blade to form a scissors assembly, such that said unitary blade is devoid of attachment to and engagement with any discrete spring member other than said second similar blade.
Dependencies are inferred from the claim text.