Patent ID: 7063331

Claim:
A mechanism for preventing intrusion of water into a boot for a universal joint boot, comprising: a communicating path to communicate an interior and an exterior of a boot with an integral fitting portion to a member to which the boot is attached when one end portion of the boot for sealing off a connecting space of the adjustable joint is engaged and fitted to the member to which the boot is attached, a fastening portion is provided on the member at a portion of the member to which the fitting portion of the boot is mated to, said fitting portion is adapted to mate with the fastening portion and the fitting portion of the boot is mated to the fastening portion of the member to which the boot is attached, so that substantially all of a tip face of a front end portion of the boot at which the communication path of the fitting portion of the boot is opening abuts a taper portion following one side of the fastening portion of the member to which the boot is attached and in a middle portion mating portion disposed inboard from the tip face, said middle portion mating portion having a mating surface substantially perpendicular to a longitudinal axis of the boot, said middle portion mating portion arranged and constructed to mate with a correspondingly perpendicular surface on the fastening portion.