Patent ID: 7195246
Filing Date: 2007-03-27
Classification: F16J

Abstract:
1. A sealing material for sealing liquid, used for medical or paint appliances, composed of a seal main body of resin having a U-shaped cross section and a concave groove opening to a direction along an axis, and an O-ring of rubber fit to the concave groove comprising a construction in which: the seal main body is provided with an end lip portion on one side along the axis and a main lip portion on a middle position along the axis both of which are on a sliding face; a dimension in the axis direction, from a base end face in another axis direction of the seal main body to a cross section central point of the O-ring, which is placed on an opening side of the concave groove in a free state, and another dimension in the axis direction, from the base end face to an end portion of the main lip portion, are set to be approximately the same in a pressure-receiving state in which pressure works on the opening direction of the concave groove and the O-ring is compressed toward a low pressure side; and a cross-sectional angle of an end portion of the end lip portion is set to be an acute angle in the free state.