Patent ID: 7578375

Claim:
A hydraulic brake lever comprising a body having a front section; a rear section; a receiving chamber being defined near the rear section of the body and having a bottom and an inner thread; a cavity being defined near the front section of the body; a bladder chamber; a flexible separator being mounted between the bladder chamber and the cavity and having a through hole defined through the flexible separator and corresponding to the receiving chamber; a rod hole being defined through the bottom of the receiving chamber along coaxially the receiving chamber; and a cavity member being disposed in the front section of the body and having a front end and a rear end; a lever bar being mounted pivotally on the body; a cylinder being mounted in the cavity and having a front end; a rear end; an outer surface; a cylinder chamber being defined longitudinally in the rear end of the cylinder and communicating with the rod hole of the body; a cylinder head being formed on the front end of the cylinder, protruding from the front end of the cavity member and having an outer thread and a flow channel defined through the cylinder head and communicating with the cylinder chamber; a threaded section being formed on the rear end of the cylinder, extending through the through hole of the flexible separator and being screwed into the receiving chamber of body; and a guide hole being defined through the outer surface of the cylinder and communicating the cylinder chamber with the cavity; and a piston set being mounted in the cylinder and comprising a piston being mounted movably in the cylinder chamber of the cylinder; a push rod extending through the receiving chamber and the rod hole of the body and being connected to the piston and the lever bar; and a spring being mounted in the cylinder chamber of the cylinder to provide the piston with a returning force.