Patent ID: 8297287

Claim:
A multi-flange earplug, comprising: a stem; a first flange positioned at a first end portion of the stem, at least a portion of the first flange having a shape on a side of the first flange facing a tip of the first end portion of the stem that is generally convex with respect to a tip of the first end portion of the stem, the first flange having a shape on a second side of the first flange facing away from the tip of the first end portion of the stem that defines a skirt cavity extending from a perpendicular plane relative to the longitudinal axis of said stem, the longitudinal axis referring to a line between the rear end of the stem and the tip, between a portion of said flange skirt and said stem; and a second flange positioned between the first flange and a second end portion of the stem, at least a portion of the second flange having a shape on a side of the second flange facing a tip of the first end portion of the stem that is generally concave with respect to the tip of the first end portion of the stem, the second flange having a shape on a second side of the second flange facing away from the tip of the first end portion of the stem that defines a skirt cavity extending from a perpendicular plane relative to the longitudinal axis of said stem, the longitudinal axis referring to a line between the rear end of the stem and the tip, between a portion of said flange skirt and said stem.