Brake master cylinder

A brake master cylinder comprising:

• a cylinder body having a cylinder bore that is open at a rear end of the cylinder body;
• a cap at least partially positioned in the cylinder bore to form a cylinder housing with the cylinder body, the cap including a bore;
• a first guide member coaxially positioned in the bore of the cap, the first guide member having a bore;
• a second guide member coaxially positioned in the cylinder bore and having a bore;
• a sleeve having a rear end coaxially fitted into the bore of the cap and a front end coaxially fitted into the bore of the second guide member, the sleeve having a bore, the sleeve having a front flange portion formed between the cap and the second guide member, the front flange portion being held between the cap and the second guide member in the axial direction;
• a first piston slidably supported in the axial direction by the bore of the first guide member and the bore of the sleeve;
• and
• a second piston located coaxially in front of the first piston and slidably supported in the axial direction by the bore of the second guide member and the bore of the sleeve.

A brake master cylinder comprising:

• a cylinder body having a cylinder bore that is open at a rear end of the cylinder body;
• a cap having a front end portion engaging the cylinder bore to secure the cap in place relative to the cylinder body, the cap including a bore;
• a first guide member coaxially positioned in the bore of the cap, the first guide member having a bore;
• a second guide member coaxially positioned in the cylinder bore and having a bore;
• a sleeve having a rear end coaxially fitted into the bore of the cap and a front end coaxially fitted into the bore of the second guide member, the sleeve having a bore, the sleeve being engaged by the cap and the second guide member so that the sleeve is axially held in place by the cap and the second guide member, the sleeve having a flange portion that is engaged by the cap and the second guide member;
• a first piston slidably supported in the axial direction by the bore of the first guide member and the bore of the sleeve;
• and
• a second piston located coaxially in front of the first piston and slidably supported in the axial direction by the bore of the second guide member and the bore of the sleeve.