Wheel cylinder for actuating a vehicle brake and a method of manufacturing same
AssigneeHilite International, Inc.
InventorsMichael P. Meagher, Art D. Johnson, Tien Nguyen
Life of this patent
Estimating the term…
Abstract
A wheel cylinder for engaging a brake shoe according to which at least one piston is disposed in the bore of a body member and is adapted to move outwardly in response to a predetermined fluid pressure in the bore into engagement with a brake shoe.
Claims14
A wheel cylinder for engaging a brake shoe, the cylinder comprising a housing having an inlet for receiving fluid and a bore in fluid communication with the inlet, at least one piston disposed in the bore, and an engagement member formed integrally with the piston, the piston, and therefore the engagement member adapted to move outwardly in response to a predetermined fluid pressure in the bore so that the engagement member engages the shoe, the piston and the engagement member being of a material that can withstand the forces resulting from the engagement with the shoe without damaging the engagement member.
A method of actuating a vehicle brake, the method comprising fabricating a piston from one piece of material hard enough to withstand forces when the piston engages a brake shoe, disposing the piston in a bore in a cylinder, and introducing fluid into an inlet in communication with the bore to force the piston outwardly from the cylinder into engagement with the brake shoe.
A method of manufacturing a piston for use in a wheel cylinder comprising extruding a bar of aluminum, and machining the bar to form a piston having a member at one end for engaging a brake shoe.
Dependencies are inferred from the claim text.