Back to results
US 10,378,671 B2Granted
Double action direction fluid flow valve
OwnerJohn Leslie Johnson, James G. Johnsoninventors
Life of this patent
Estimating the term…
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.
Claims17
A fluid flow valve comprising:
- a body member having flow ports interconnected by a flow orifice, the flow orifice surrounded by an annular planar valve seat normal to an operating axis;
- a stepped piston counterbore in the body member spaced from and coaxial with the annular planar valve seat, the stepped piston counterbore having an open end and a closed end, wherein the stepped piston counterbore has a first portion having a first diameter and a second portion having a second diameter greater than the first diameter;
- a valve guide sealing the open end of the piston counterbore and having an opening therethrough coaxial with the operating axis;
- a stepped piston slidably supported in the stepped piston counterbore coaxial with the operating axis, the stepped piston forming a first chamber between the stepped piston and the closed end of the stepped piston counterbore and a second chamber between the stepped piston and the valve guide, wherein the stepped piston counterbore has a first portion having a first diameter and a second portion having a second diameter greater than the first diameter, wherein at least a portion of the first portion of the stepped piston is received in the first portion of the stepped piston counterbore, and the second portion of the stepped piston is received in the second portion of the stepped piston counterbore;
- a poppet valve member having a stem extending through the opening in the valve guide and coaxially operatively connected to the piston for concurrent movement between an open position and a closed position, the poppet valve member having an enlarged head section, the enlarged head section having a sealing surface normal to the operating axis for engaging the valve seat in the closed position at a sealing interface;
- and
- a controller for selectively pressurizing and depressurizing the second chamber while maintaining pressurizing of the first chamber to move the stepped piston and the poppet valve between the open position and the closed position.
4 more elements
Dependencies are inferred from the claim text.