Double action directional fluid flow valve

US8256738B2 · kind B2 · utility

Inventors

• John L. Johnson · Raleigh, US
• James G. Johnson · Lake Forest, US

Key dates

• Filing date: Sep 5, 2008
• Grant date: Sep 4, 2012
• Expiry date: Jul 6, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/8667
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position.