Abstract: An tire pressure indicator operative to provide a first visual indication if the tire pressure within a tire to which the indicator is coupled is below a first predetermined pressure and a second different visual indication if the tire pressure is above a second predetermined pressure. The indicator includes first and second magnetic members rotatably mounted within a housing that includes a transparent portion. The first magnetic member rotates in response to air pressure applied to a diaphragm that is mechanically coupled to the first magnetic member. The second magnetic member includes portions having first and second visual characteristics that are viewable through a transparent portion. The second magnetic member is cooperative with the first magnetic member to rotatably orient the second magnetic member such that the first or second visual characteristic is visible through the transparent portion.

Abstract: A tire pressure indicator for coupling with a valve stem of a tire. The tire pressure indicator provides a first visual indication in the event that the tire pressure is below a first threshold limit and a second visual indication if the tire pressure is above a second threshold limit. The pressure indicator includes a dome shaped indicator and a dome shaped cover that is mounted over the indicator. The cover includes a plurality wedge shaped transparent viewing windows extending from near the top of the dome. The transparent viewing windows are separated by opaque portions. The indicator has a plurality of alternating wedge shaped areas of first and second colors extending from near the top of the dome to the lower peripheral edge of the indicator. The rotation of the indicator is related to the tire pressure. In one orientation of the indicator that occurs when the tire pressure is below a first predetermined limit, the first color is visible through the transparent viewing windows of the outer dome.