Patent ID: 7516617
Filing Date: 2009-04-14
Classification: B60T

Abstract:
1. A master cylinder comprising: a cylinder body having a tubular shape with a closed end; a piston having one side thereof slidably inserted into the cylinder body and another side thereof projecting from the cylinder body, the piston and the cylinder body defining a pressure chamber for generating hydraulic pressure; and a protecting member for covering said another side of the piston projecting from the cylinder body, the protecting member being adapted to extend and contract, and limit backward movement of the piston, wherein; the protecting member comprises a first cover member having one side thereof fixedly engaged with the cylinder body, and a second cover member having one side thereof slidably engaged with another side of the first cover member; an outer circumferential surface of the one side of the second cover member is slidably engaged with an inner circumferential surface of the another side of the first cover member; and the one side of the second cover member has an enlarged diameter portion which is adapted to slide on the inner circumferential surface of the first cover member.