Patent ID: 11925342
Assignee: HOWMEDICA OSTEONICS CORP.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A dilation device comprising:
a frame with a central opening therein;
five arm clamps, each arm clamp attached to the frame; and
five arms, each arm attached to one of the five arm clamps and being spaced apart from the frame, the five arms being translatable and a first arm and a second arm of the five arms being movable together based on a single manipulation of the frame,
an arm retention clip including a plurality of circumferentially located, spaced-apart short prongs and a plurality of circumferentially located, spaced apart intermediate length prongs, wherein the short prongs are positioned where adjacent arm clamps touch, and wherein the intermediate length prongs are positioned through the central opening so as to be partially positionable in between the first, second and third arms to thereby aid in holding the dilation device closed during insertion into a tissue or a natural passageway, the arm retention clip including a stylus that projects outwardly from a central disk so as to be spaced-away and circumscribed by the intermediate length prongs with one or more laterally projecting tabs positioned away from a center of the frame so that when the arm retention clip is positioned within the central opening, the tabs being sized and shaped so as to engage a complementary correspondingly positioned groove on each arm;
wherein the stylus defines a cannulation sized to receive a small diameter shaft,
wherein one of the first arm, the second arm or a third arm of the five arms includes a first protrusion and a first groove along a longitudinal axis the length of the one of the first arm, the second arm or the third arm, the first groove facing the center of the frame with one of the arm clamps of the five arm clamps corresponding to the one of the first, second or third arm includes a first recess that receives the first protrusion, and
wherein the first arm includes a length with a first end attached to the one of the arm clamps and a second end remote from the frame, the first arm having a depth in a radial direction, the depth tapering from the first end toward the second end over at least part of length.