Abstract: A device and a method for removing objects from tubular body passages such as arteries, urinary passages, respiratory passages, alimentary canal passages, or other body passages. An elongated element has a ring at its distal end which surrounds the object. On the inside of the ring is a balloon which is constrained by the ring to inflate only inwardly, such that upon the inward inflation it engages and grasps the object to be removed. The device is then withdrawn, whereby the ring and the inflated balloon carry the object with it out of the body passage. Fluid such as air is introduced into and removed from the balloon via a line which runs from the balloon back along the elongated element to the proximal end of the device. A dye line may also be provided, running from the distal end of the device to the proximal end for introducing a dye into the body passage ahead of the ring for diagnostic purposes.

Abstract: A device and a method for removing objects from tubular body passages such as arteries, urinary passages, respiratory passages, alimentary canal passages, or other body passages. An elongated element has a ring at its distal end which surrounds the object. On the inside of the ring is a balloon which is constrained by the ring to inflate only inwardly, such that upon the inward inflation it engages and grasps the object to be removed. The device is then withdrawn, whereby the ring and the inflated balloon carry the object with it out of the body passage. Fluid such as air is introduced into and removed from the balloon via a line which runs from the balloon back along the elongated element to the proximal end of the device. A dye line may also be provided, running from the distal end of the device to the proximal end for introducing a dye into the body passage ahead of the ring for diagnostic purposes.

Abstract: A rotatable shell cutter has a cylindrical member which advances to cut into a pipe. A plurality of cutting elements are arranged in a circle at one end of the cylinder. Each cutting assembly comprises a cartridge fixed as one piece to the cylindrical member, such as by brazing or the like, a seat positioned thereon through dowel pins, a cutting insert mounted on the seat through a cooperating V-shaped projection and recess, and a clamp engaging, positioning and securing the cutting element against the seat and also secured to the cartridge for urging all of the cutting assembly elements together.