Patent ID: 8893859

Claim:
A hydraulic brake controller having a controller main body, the controller main body comprising: an oil storing space for storing hydraulic oil; a main oil cylinder provided with a piston driven by a brake handlebar; a first oil-return hole connecting the oil storing space to the main oil cylinder and disposed at a stroke place of allowing the piston to reciprocate in the main oil cylinder; and a regulating screw screwed to the controller main body and adapted for being releasably inserted into the first oil-return hole, so that the passage of hydraulic oil through the first oil-return hole is adjusted by the extent of insertion of the regulating screw into the first oil-return hole; and wherein the oil storing space is disposed axially with respect to the main oil cylinder of the controller main body, and a sleeve is engaged with the main oil cylinder disposed within the oil storing space of the controller main body, and the controller main body has an installation hole, which communicates with the oil storing space, disposed to another end of the oil storing space that is engaged with the main oil cylinder, and a fastening seat is disposed to the installation hole of the controller main body, and the fastening seat has a positioning sheath stretching into the controller main body and has an extension portion protruding inwardly to engage with the sleeve to cooperatively define the main oil cylinder, and a draw bar passes through a central portion of the positioning sheath to link the piston and the brake handlebar, and a leakage prevention component for preventing oil leakage from the main oil cylinder is disposed between the fastening seat and the controller main body, and a rigid bushing extending from the leakage prevention component to surround the extension portion of the positioning sheath and the sleeve, so that the bushing and the handlebar base cooperatively define the oil storing space having a fixed volume.