Patent ID: 7823889
Filing Date: 2010-11-02
Classification: F01D,F05D,F16J,F16L,Y02T

Abstract:
1. A tube seal having a tubular body and a seal part, wherein said seal part comprises: a base material; a porous coating layer formed by flame spraying a hard material on a seal surface of said base material, wherein said base material and said porous coating layer are free of any movement relative to each other; and a lubricating film provided on said porous coating layer, wherein said porous coating layer and said lubricating are free of any movement relative to each other, said lubricating film containing at least one material selected from silver, gold, tin, and a gold-cobalt alloy, wherein a thickness of said porous coating layer is 10 to 200 μm and a thickness of said lubricating film is 1 to 50 μm, wherein said seal part defines a seal surface and includes a fixed part configured to have a tubular shape and a flexible part that is deformable in a radial direction, and wherein an intermediate channel is defined in a hollow part of the tubular body of said tube seal, wherein fluid is able to freely flow through said intermediate channel, which is located between and in communication with a first channel defined by a first channel forming member and a second channel defined by a second channel forming member.