Metal working – Means to assemble or disassemble – Means comprising hand manipulatable tool
Patent
1999-06-28
2000-08-29
Bryant, David P.
Metal working
Means to assemble or disassemble
Means comprising hand manipulatable tool
606198, 623 1, 29516, 29282, 292035, A61M 2900
Patent
active
061088862
ABSTRACT:
A stent crimping tool for firmly and uniformly crimping a stent onto a balloon catheter is constructed from a crimping section holding the stent and the balloon catheter therein, wherein the crimping is actuated by a shaft having an input end and an output end, engaging the crimping section at the output end. The shaft has a detent formed into the input end. A gripping member has an internal cavity to receive the input end, and includes a hole proximate to the shaft, wherein a ball bearing and a compression spring are located within the hole to bias the ball bearing toward the shaft and to engage the detent. When a torque is applied to the gripping member, it is transmitted through the ball bearing to the shaft; if the torque exceeds a predetermined magnitude, it overcomes the force of the spring on the ball bearing causing the bearing to slide out of the detent thereby disconnecting the applied torque from the shaft. The crimping section can be a rubber tube having a lumen holding the stent and catheter. When the shaft compresses the rubber tube as it advances, the lumen collapses and crimps the stent onto the catheter. In another embodiment, the crimping section is a coiled filament suspended at both ends and having an axial space holding the stent and catheter. Rotating the shaft twists the filament which in turn constricts and crimps the stent onto the catheter.
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Kimes Richard M.
Mirizzi Michael S.
Blount Steven A
Bryant David P.
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