Patent ID: 6325124
Filing Date: 2001-12-04
Classification: B60C

Abstract:
A rotary coupling for one or more wheels mounted to an axle end of a vehicle, for communicating at least one wheel tire to an air-pressure control arrangement installed on the vehicle and comprising:(a) a body mounted to the wheel, said body having an inside wherein a pressurized air chamber is formed and having at least one orifice formed in said body for communicating said chamber to said tire(s);(b) a rotary stem extending inside said body and axially traversed by a conduit opening out into said chamber, said stem having an end projecting from said body for operatively connecting said conduit to said air-pressure control system; and(c) a rotary seal housed in said body and said rotary stem to normally block pressurized air from escaping from said chamber in communication with said axial conduit,wherein said projected end of the stem is provided with a connection device to a pressurized air passage passing inside said vehicle axle for communicating said chamber through said conduit to said pressure control system,said coupling further including a vent opening on the opposite side of said seal from said chamber, andwherein the internal end of said stem is supported by a bushing seated on said body, said bushing formed with at least one passage providing communication between said chamber and said at least one orifice.