公开(公告)号：US06543786B2

公开(公告)日：2003-04-08

申请号：US09801860

申请日：2001-03-09

申请人： Shiro Osumi ,  Naoki Hayakawa ,  Takanobu Matsumoto ,  Yamada Takeshi ,  Imai Takayuki

发明人： Shiro Osumi ,  Naoki Hayakawa ,  Takanobu Matsumoto ,  Yamada Takeshi ,  Imai Takayuki

IPC分类号： F16J1532

CPC分类号： F16J15/3276 ,  F16J15/3228

摘要： A lip type seal (3A) has an annular casing (31), a plurality of seal lips (32, 34) and a rear surface support ring (35) arranged at the rear side. The casing (31) is installed to an inner circumferential surface of a seal installation part (1a) of a shaft hole housing (1) of an equipment through a main gasket (36) made of rubber state elastic material. An inner circumferential part of the seal lips (32, 34) is closely contacted with an outer circumferential surface of a rotary shaft (2). A sub-gasket (41) made of a material having a CO2 transmission coefficient being smaller than that of rubber material is interposed between the rear surface support ring (35) and the shaft hole housing (1).