Anti-backspin component for vascular prosthesis delivery device

A delivery device, comprising:

• a) a handle body, having a longitudinal axis, a proximal end, and a distal end;
• b) a gear rack extending within the handle body;
• c) a proximal handle extending about the gear rack and defining teeth, the proximal handle being rotatable about the handle body and the gear rack;
• d) a distal handle that extends around the handle body at the distal end of the handle body;
• e) a guidewire catheter having a proximal end and a distal end, the guidewire catheter extending through the handle body, the proximal handle, the distal handle, and along the longitudinal axis;
• f) a gear assembly linking the teeth of the proximal handle to the gear rack, whereby rotation of the proximal handle about the longitudinal axis moves the proximal handle and the delivery catheter along the longitudinal axis relative to the gear rack, wherein the gear assembly includes
• i. a pinion gear assembly engaging the gear rack, and
• ii. a linking gear assembly including an upper linking gear engaging the teeth of the proximal handle and a lower linking gear fixed to the upper linking gear and between the upper linking gear and the longitudinal axis of the handle body, and having teeth engaging the pinion gear assembly,
• g) an actuator that includes the gear assembly and which further includes
• i. a housing extending about the handle body and having a proximal end defining a proximal opening and a distal end defining a distal opening, the housing further defining an aperture between the proximal opening and the distal opening, and
• ii. a pin extending through the central openings of the upper linking gear and the lower linking gear, the pin including opposite ends that are at the locking mechanism assembly and the housing;
• h) a first clutch at the gear assembly, whereby the first clutch engages the gear assembly with the proximal handle and thereby biases longitudinal movement of the gear assembly and associated rotation of the proximal handle about the longitudinal axis, wherein rotation of the proximal handle about the longitudinal axis when the first clutch is engaged is resisted by friction between the first clutch and at least one of the gear assembly and a portion of the remainder of the delivery device;
• and
• i) a second clutch that engages the linking gear assembly with the pin when the pinion gear assembly is directed distally along the gear rack during the engagement of the linking gear assembly with the pinion gear.