Patent ID: 7014214

Claim:
A resinous connector, comprising: a flange-shaped base welded to a resinous container, in which an opening is formed, wherein the flange-shaped base covers the opening, and an outer periphery of the base is formed of a first resin, which is weldable to the container; a nipple extending from the base, wherein the nipple includes: a root, which extends from the base, wherein the root has an outer periphery that is formed of the first resin; a distal portion, which is distal with respect to the root, wherein at least the distal portion is formed of a second resin, which is more rigid than the first resin; sealing projections, which are located on the outer peripheral surface of the distal portion and formed of the second resin, wherein each sealing projection has a substantially triangular cross section such that a diameter of each sealing projection decreases in a direction away from the base, wherein the nipple is press-fitted into a hose such that an outer peripheral surface of the distal portion is fastened to an inner peripheral surface of the hose; and an O-ring groove formed in a surface of the nipple adjacent to the root or in the surface of the root; and an O-ring located in the O-ring groove between the outer peripheral surface of the nipple and the inner peripheral surface of the hose, such that the O-ring seals between the outer peripheral surface of the nipple and the inner peripheral surface of the hose.