Patent ID: 6216357
Filing Date: 2001-04-17
Classification: G01B

Abstract:
A brake drum gage for measuring an inside diameter of a brake drum of a vehicle with a wheel mounted on the vehicle in a presence of an axle tube and other undercarriage components or parts, comprising an elongate generally flat bar having proximate and remote ends and defining an elongate axis and reference plane; a fixed element fixedly mounted at said proximate end of said bar and a movable element movably mounted on said bar for movements along said bar between proximate and remote ends for adjusting a spacing between said elements, each element including a generally V-shaped arm including an upright portion generally parallel to said reference plane and an angled portion inclined an angle .alpha. in relation to said reference plane of said flat bar; a fixed anvil on said angled portion of said fixed element and having a tip extending beyond said fixed element in a direction of said proximate end of said bar and a movable anvil on said angled portion of said movable element and having a tip extending beyond said movable element in a direction of said remote end of said bar; indicating means for providing an indication of a distance between the tips of said anvils on said angled portions being positionable at diametrically opposition positions on an inside cylindrical surface of a brake drum while said bar is spaced inwardly from said drum and clears the axle tube and other undercarriage components or parts of the vehicle, whereby the drum gage can be used to measure brake drums without removing wheels from a vehicle.