Positive retraction bypass valve system and method
AssigneeHydrablast Technologies, Inc.
InventorDieter A. Tischler
Life of this patent
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Abstract
The present disclosure provides a system and associated method for a positive retraction bypass valve. The positive retraction bypass valve can include a dump cartridge in a valve body with a valve stem biased to an open position to allow flow through a drain path. An adjuster can advance toward the valve stem and oppose the bias to at least partially close the valve. Upon retraction of the adjuster from the valve body, a retraction rod assembly with a retraction rod coupled to the adjuster and the valve stem can pull the valve stem toward the adjuster if the bias or fluid pressure on the valve stem does not move the valve stem toward the adjuster.
Claims10
A positive retraction bypass valve, comprising:
- a valve body having a proximal end and a distal end and having a flow path, a drain path, and a valve body cavity formed in the valve body and fluidicly coupled to the flow path and the drain path;
- a dump cartridge having a slidable valve stem, the dump cartridge being disposed in the valve body cavity;
- a bias member configured to bias the slidable valve stem in the dump cartridge to allow flow through the drain path;
- an adjuster adjustably coupled to the valve body and configured to push the valve stem toward a closed position to progressively restrict flow through the drain path;
- and
- a retraction rod releasably coupled to (i) the adjuster on a proximal portion of the rod, (ii) the valve stem on a distal portion of the rod, or (iii) a combination thereof;
- the rod being configured to pull the valve stem toward the adjuster if the valve stem does not follow the position of the adjuster when the adjuster is moved in the direction away from the valve stem.
A method of operating a bypass valve, the bypass valve formed with a flow path and a drain path, and having a valve body with a dump cartridge disposed therein, the dump cartridge having a valve stem that is biased with a bias member, and an adjuster coupled to the valve body with a retraction rod coupled between the adjuster and the valve stem, the method comprising:
- adjusting a fluid flow through the flow path of the valve by moving a position of the adjuster in a direction toward the valve stem to change a flow through the drain path;
- moving the adjuster in a direction away from the valve stem;
- allowing the valve stem to follow the position of the adjuster by a bias of the bias member when the adjuster is moved in the direction away from the valve stem;
- and
- pulling the valve stem with the retraction rod, if the valve stem does not follow the position of the adjuster when the adjuster is moved in the direction away from the valve stem.
Dependencies are inferred from the claim text.