Control valve assembly for load carrying vehicles

US8267120B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Lawrence J. Fry · Lexington, US
• Joseph W. Lehmann · Atlanta, US
• Michael P. Haskin · Georgetown, US
• Gregory W. Peterson · Belcamp, US

Key dates

• Filing date: Jun 10, 2011
• Grant date: Sep 18, 2012
• Expiry date: Jun 10, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/8671
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A control valve assembly is provided for a load carrying vehicle that includes a storage space and a dumping mechanism. The control valve assembly includes a housing and a sliding valve positioned within the housing and movable between a first position, and a second position. The sliding valve includes a first piston that defines a first piston first surface and a first piston second surface, and a second piston that defines a second piston first surface and a second piston second surface. The first piston second surface faces the second piston first surface. A pilot system includes a first pilot passage in fluid communication with the first piston second surface to selectively actuate the sliding valve toward the first position, and a second pilot passage in fluid communication with the second piston first surface to selectively actuate the sliding valve toward the second position.