Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
A a rotary cutting device for removing obstructive tissue from a body vessel, comprising: a hollow cylindrical base means having an outer wall; guide means coaxially distanced from said base means cutting means extending between said base means and said guide means for alternately cutting said tissue with a first cutting edge and with a second cutting edge longer than said first cutting edge; and an ovoid portion on said base means for allowing said second cutting edge to extend beyond said outer wall of said base.
Claim 2
Dependent Claim
87 words
A a rotary cutting device for removing obstructive tissue from a body vessel, comprising: a hollow cylindrical base means having an outer wall; guide means coaxially distanced from said base means cutting means extending between said base means and said guide means for alternately cutting said tissue with a first cutting edge and with a second cutting edge longer than said first cutting edge; and an ovoid portion on said base means for allowing said second cutting edge to extend beyond said outer wall of said base.
Claim 3
Dependent Claim
45 words
A rotary cutting device according to Claim 1 wherein said base means has a generally rectangular top opening having a front rim for receiving debris, and has a sloped portion adjacent said rim of said opening to facilitate travel of said cutter through said vessel.
Claim 4
Dependent Claim
33 words
A rotary cutting device according to Claim 1 or 2 wherein the cutting means comprises a pair of diametrically opposed blades each blade having a first cutting edge and a second cutting edge.
Claim 5
Dependent Claim
25 words
A rotary cutting device according to Claim 3 wherein the first cutting edge and the second cutting edge of each blade face opposite each other.
Claim 6
Dependent Claim
43 words
A rotary cutting device according to Claim 3 or 4 wherein said first cutting edge of said blades each face in a first direction, and wherein said second cutting edge of said blades each face in a second direction opposite said first direction.
Claim 7
Dependent Claim
35 words
A rotary cutting device according to Claim 3, 4 or 5 wherein said base includes a straight wall portion connecting said pair of blades to establish said first cutting edge on each of said blades.
Claim 8
Dependent Claim
38 words
A rotary cutting device according to any of Claims 3 to 6 wherein said pair of blades are inclined to the longitudinal axis of said cutter at an angle in the range of between thirty and seventy degrees.
Claim 9
Dependent Claim
21 words
A rotary cutting device according to any preceding claim wherein said first cutting edge does not extend beyond said outer wall.
Claim 10
Dependent Claim
36 words
A rotary cutting device according to any preceding claim wherein said second cutting edge extends beyond said outer wall by an amount equivalent to between five to ten percent of the diameter of said cylindrical base.
Claim 11
Dependent Claim
17 words
A rotary cutting device according to any preceding claim wherein said cutter is made of stainless steel.
Claim 12
Dependent Claim
32 words
A rotary cutting device according to any preceding claim further comprising a guide wire insertable through said base and said guide means for guiding said cutter along said wire through said vessel.
Claim 13
Dependent Claim
30 words
A rotary cutting device according to any preceding claim further comprising means coupled to said base for rotating said cutter, and suction means for removing debris through said hollow base.
Claim 14
Dependent Claim
20 words
A rotary cutting device according to any preceding claim wherein said base includes a sloped surface adjacent said ovoid portion.