Patent ID: 7465278
Filing Date: 2008-12-16
Classification: A61B

Abstract:
1. device for severing and removing internal tissues, comprising: a body; a hollow probe affixed to said body, said probe having a receiving aperture thereon and a free distal end; a cutter having a hollow distal portion within said probe and a cutting edge on said distal portion, said cutter being longitudinally movable between a first position and a second position within said probe, wherein said cutter is operable to at least partially obstruct said receiving aperture when said cutter is in said first position; a plunger having a distal portion within said cutter, and longitudinally movable within said cutter; a first spring held by said body and in mechanical communication with said cutter and said plunger; a second spring held by said body and in mechanical communication with said cutter; a first trip mechanism held by said body, wherein said first trip mechanism is operable to alternately effect restraint of said first spring when said first spring is loaded, and effect release of said first spring; and a second trip mechanism held by said body, wherein said second trip mechanism is operable to alternately effect restraint of said second spring when said second spring is loaded, and effect release of said second spring; wherein the cutter is operable to remain stationary in said first position when said first spring and said second spring are loaded; wherein release of said first spring causes said cutter to travel proximally within said probe toward said second position, thereby opening said receiving aperture, wherein release of said first spring further causes tripping of said second trip mechanism to effect release of said second spring, wherein release of said second spring causes said cutter to travel distally within said probe toward the first position.