A master cylinder includes a seal defining a feeding channel and an exterior of a cylinder main body having an inner circumferential lip portion which protrudes from a toric base portion and comes into sliding contact with an outer circumferential surface of a piston, and an outer circumferential lip portion which abuts a circumferential groove of the cylinder main body. The inner circumferential lip portion has a length in a piston axis direction longer than the outer circumferential lip portion. The circumferential groove has an inclined surface portion formed in a circumferential wall on the feeding channel side such that a groove width increases from a groove bottom portion toward a groove opening portion.
マスタシリンダ
2020-11-18
Patent
Electronic Resource
Japanese