Device and method of radially collapsing medical devices

A method of assembling a crimping device, the method comprising of:

• fixing one gear ring inside at least one of two housing plates,
• placing a guide plate concentrically within an inner circumference of the gear ring such that the at least one of the two housing plate is capable of rotating freely relative to the guide plate,
• fixing a plurality of gear pins on each guide plate such that a head portion of each gear pin is threadedly engaged with the gear ring, wherein, post engagement, each gear pin is free to rotate on its respective axes,
• aligning a groove of a plurality of grooves of a plurality of jaws with respective linear guides of the guide plate and simultaneously fixing the plurality of jaws to respective pin portions of the gear pins by providing a threaded connection between a pin portion and the jaw, the fixing of the plurality of jaws resulting in a uniform polygonal iris opening, wherein, all the jaws engage same number of threads of the pin portions so that all the jaws are at the same radial distance from the center of the guide plate,
• placing a second guide plate concentrically and firmly fixed onto the guide plate forming a second housing that houses the gear pins and the jaws attached to each other,
• placing the other housing plate onto the second guide plate concentrically such that the other housing plate can freely rotate relative to the assembly of the guide plates,
• fixing both of the two housing plates firmly with each other such that a first housing is formed after fixing including a handle formed by handle portions of the two housing plates.

A method of assembling a crimping device, the method comprising:

• fixing one gear ring inside at least one of two housing plates such that the gear ring is either free to rotate or fixed firmly in the respective housing plate,
• placing a guide plate concentrically inside one of the two housing plates within an inner circumference of the gear ring fitted in the respective housing pate such that the respective housing plate is capable of rotating freely relative to the guide plate,
• fixing a plurality of gear pins such that a head portion of each gear pin projects out from the guide plate thereby allowing engagement of external threads on the head portion with threads of the gear ring fixed inside the at least one of the two housing plates, wherein all the gear pins are free to rotate on their respective axes,
• fixing the jaws to the gear pins by threading a pin portion of the gear pin into internal threads of a hole on a top portion of the jaw and a groove of a plurality of grooves on a side of each jaw engages with linear guides of the guide plate, wherein, all the jaws being arranged such that the jaws engage same number of threads of the gear pins so that all the jaws are at the same radial distance from the center of the guide plate, wherein all the jaws and the gear pins being fixed in a manner that the tapered portions of all jaws collectively form a uniform polygonal iris opening,
• placing a second guide plate concentrically and firmly fixed onto the guide plate forming a second housing that houses the gear pins and the jaws attached to each other such that a second set of grooves of the corresponding jaw gets engaged with the linear guides of the second guide plate, and the head portions of the gear pins project out from the assembly of two guide plates such that the gear pins are free to rotate along their respective axes,
• placing the other housing plate onto the second guide plate concentrically such that the threads on the head portions of all the gear pins mate with the threads of the gear ring placed inside the other housing plate if provided, such that the other housing plate can freely rotate relative to the assembly of the guide plates,
• fixing both of the two housing plates firmly with each other such that after fixing, a first housing is formed, handle portions of the two housing plates form a complete handle, and the assembly of both housing plates can rotate freely relative to the assembly of the two guide plates,
• fitting one or more side plates on each side of the assembly of the housing plates and the guide plates such that a central openings in the one or more side plates are concentric with central housing openings of the housing plates and the guide openings of the guide plates forming a central round opening,
• fixing the one or more side plates firmly with each other and with the guide plates such that the assembly of the housing plates is free to rotate relative to the one or more side plates and guide plates around the central opening,
• the above assembly of the one or more side plates, the housing plates and the guide plates is fixed onto a base plate making the assembly of the side plates and the guide plates stationary and the assembly of housing plates is free to rotate around the central round opening,
• wherein movement of the handle imparts rotational motion to the housing plates around the central round opening, which rotates the gear rings which in turn rotates the head portions of the gear pins, thereby causing the threads in the pin portion of the gear pins to rotate within the internal threads of the holes at the top of the jaws causing the jaws to move in radial direction guided by the linear guides in the guiding plates causing a size of the iris opening to change.