CLUTCH SEAL

摘要

The invention provides a clutch seal which can enhance a durability of a membrane portion which is a constituting part of a seal and is constructed by a rubber-like elastic body, and can inhibit a working fluid from standing in a concave surface of the membrane portion. The clutch seal of the invention is an annular seal interposed between a clutch plate in a dry clutch and a piston pressing the clutch plate, has a middle ring fixed to the piston between an outer ring and an inner ring which are fixed to a clutch housing, and has membrane portions constructed by a rubber-like elastic body respectively between the outer ring and the middle ring and between the inner ring and the middle ring, wherein the middle ring is arranged at an intermediate position of a stroke in an initial shape of the membrane portion.

主权项

1. A clutch seal comprising:
the clutch seal being an annular seal interposed between a clutch plate in a dry clutch and a piston pressing said clutch plate; a middle ring fixed to said piston between an outer ring and an inner ring which are fixed to a clutch housing; and membrane portions constructed by a rubber-like elastic body respectively between said outer ring and the middle ring and between said inner ring and the middle ring, wherein said middle ring is arranged at an intermediate position of a stroke in an initial shape of said membrane portion.