Christopher E Ward

Address:

2118 Dodson Ave, Knoxville, TN 37917

VIN:

JM1BK32F771674513

Make:

MAZDA

Model:

MAZDA3

Year:

2007

US Patent:

58950990, Apr 20, 1999

Filed:

Oct 17, 1997

Appl. No.:

8/953561

Inventors:

Friedrich Konrad Diecke - Knoxville TN
Christopher Mark Ward - Sycamore IL
Clyde Bennett Stevens - Columbus OH

Assignee:

Deere & Company - Moline IL

International Classification:

B60T 1374

US Classification:

303 961

Abstract:

A vehicle brake includes a compact module having an inlet port connected to the return-to-sump line of a hydraulic operating system on the vehicle. The module includes a path to a filter mounted on the module for filtering the operating system fluid and a poppet valve for bypassing a clogged filter. Passages in the module direct most of the return line fluid through a poppet valve which develops a source of back pressure substantially lower that system operating pressure in a cavity in the module and returns the fluid to an outlet connected to sump. A portion of the fluid in the cavity is communicated via a charge port in the module to a hydrostatic system to replenish leakage and shuttle flow in the hydrostatic system and to prevent cavitation. The source of back pressure in the module is selectively connected to spring-applied, pressure-released brakes through a four-way solenoid valve housed by the module. To release the brakes, the valve is actuated to direct pressure to one side of each of the brake cylinders.