Patent ID: 7306587

Claim:
A handle for a medical device comprising: a frame enclosing a transmission and a driving second rack, said transmission being mounted to the frame and said driving second rack moveably attached to the frame and coupled with the transmission, a moveable first rack at least partially enclosed within the frame, said moveable first rack being moveably attached to the frame and coupled with the transmission; a sheath secured to the moveable first rack; and a cable assembly secured to the frame and extending through the sheath; wherein the transmission further comprises a gear assembly having a first gear operably coupled with a second gear, with the moveable first rack operably coupled with the first gear and slidably engaged with the frame, and the driving second rack operably coupled with the second gear and slidably engaged with the frame; and wherein the transmission has a predetermined mechanical advantage determined by a parameter of the first gear relative to a parameter of the second gear; and wherein the first gear or the second gear is a double gear.