Patent ID: 7665624
Filing Date: 2010-02-23
Classification: B60K,F16J,Y10S

Abstract:
1. An annular gasket that is pressed between a seal retaining portion which holds the gasket, and a seal face of a tank opening forming member, the gasket comprising: a gasket body having a first lip pressed by the seal face, a second lip pressed by the seal retaining portion, and a connecting portion integrally connecting the first lip with the second lip, wherein the gasket body is substantially C-shaped in cross-section, and wherein the connecting portion includes an inside peripheral portion, the first lip includes an inside peripheral portion, and the second lip includes an inside peripheral portion; and an assist rib projecting from the inside peripheral portion of the second lip toward the inside peripheral portion of the first lip, wherein the assist rib has a pressing face formed substantially parallel to the seal face, the assist rib is configured such that the pressing face presses and elastically deforms the inside peripheral portion of the first lip, and then a distal edge of the first lip comes into contact with the seal face when the gasket body is compressed between the seal retaining portion and the seal face, and wherein the assist rib is provided with air channels for venting air.