Walter Gene Myers

US Patent:

46450394, Feb 24, 1987

Filed:

Jun 20, 1985

Appl. No.:

6/746719

Inventors:

Billy M. Lewis - Joplin MO
Walter I. Myers - Tulsa OK

Assignee:

Wiseda Ltd. - Cardin OK

International Classification:

F16D 5522

US Classification:

188 723

Abstract:

A parking brake assembly for large off-highway vehicles and comprising a housing adapted to be installed around the rotatable drive shaft of a wheel motor, a plurality of clutch plates disposed within the housing and engaged with the drive shaft for rotation or non-rotation simultaneously therewith, a piston assembly reciprocally disposed within the housing and having a normal position of pressure engagement with the clutch plate whereby the brake assembly is normally in a braking engagement with the drive shaft, an annular chamber is provided in the housing and in communication with the piston for receiving a pressure fluid therein and exhausting the pressure fluid therefrom, the application of a pressure fluid into the chamber causing the piston to move into a non-braking pressure position with respect to the clutch plates and the release of fluid pressure from the chamber permitting the piston to return to the braking pressure engagement with the clutch plates.