Patent Number: 6,305,505

Title: Reduced friction wet disc brake

Abstract: An improve wet disc brake incorporates a two part rotating disc. One of the two parts is selectively rotatable, and the other part is constantly rotating with the rotor. The rotor carries an air supply which creates an air bearing between the constantly rotating disc portion and the selectively rotating disc portion. During non-braking operation the air bearing maintains the selectively rotating portion out of contact with the rotating portion. Fluids other than air may be used. The selectively rotating portion thus remains stationary within the wet disc brake chamber, reducing frictional losses. When braking is desired, the flow of air to the air bearing is stopped. A bias force forces the selectively rotating portion into contact with the constantly rotating portion. Then, braking does occur by operation of the stator discs to move towards contact with the rotor discs.

Inventors: Johnston; Paul M. (Troy, MI), Naerheim; Yngve (Thousand Oaks, CA)

Assignee: Meritor Heavy Vehicle Systems, LLC

International Classification: F16D 65/12 (20060101); F16D 55/24 (20060101); F16D 55/40 (20060101); F16D 55/32 (20060101); F16F 055/02 ()

Expiration Date: 10/23/2018