Tractor/trailer suspension with hub temperature indicating device

Abstract

A vehicle suspension includes a hub and a hub temperature indicating device visible from an exterior of the hub and exposed to a temperature within an interior of the hub, and including a material which changes color in response to a predetermined change in the hub interior temperature. A hub temperature indicating device includes one of a hub cap plug and a hub cap window, including a material which changes color in response to a predetermined change in temperature in the hub interior. Another hub temperature indicating device includes a material which is operative to change color in response to a temperature change in a hub interior, the material comprising an irreversible temperature change indicating material; another material adjacent the first material, and which is operative to transfer heat between the hub interior and the first material; and the device being configured to attach to a hub cap.

Dependencies are inferred from the claim text.