Flushing hydrant with fail-safe
AssigneeMueller International, LLC
InventorsLeo W. Fleury, Jr., Normand James Roy, James Ola Williams, Kenneth A. Clark, Paul Gifford, Christian Michael Granata, Edward C. Parish
Life of this patent
Estimating the term…
Abstract
A device for flushing a hydrant includes a stem connected to a fluid valve of the hydrant and an actuation system including a biased translational system coupled to the stem, a compressed gas, and a normally-open gas discharge valve. An actuation system for flushing a hydrant includes a fluid, a piston assembly movable by the fluid, a manual bleed valve in communication with the fluid, and a biasing element at least indirectly biasing the piston assembly towards a stop position.
Claims20
A device for flushing a hydrant comprising:
- a stem connected to a fluid valve of the hydrant;
- and
- an actuation system including:
- a biased translational system coupled to the stem;
- a compressed gas;
- a normally-open gas discharge valve;
- a normally-closed gas intake valve and
- a hold down assembly coupled to the stem and defining a pressure cavity in fluid communication with the normally-open gas discharge valve and the normally-closed gas intake valve, the pressure cavity including a piston plate within the pressure cavity.
An actuation system for flushing a hydrant comprising:
- a fluid;
- a piston assembly movable by the fluid, the piston assembly including a piston plate within a pressure cavity defined in a hold down assembly;
- a normally-open fluid discharge valve in fluid communication with the pressure cavity;
- a normally closed fluid intake valve in fluid communication with the pressure cavity;
- a manual bleed valve in fluid communication with the pressure cavity;
- and
- a biasing element at least indirectly biasing the piston assembly towards a stop position.
A method of flushing a hydrant comprising:
- operating an actuation system coupled to the hydrant, the actuation system including a compressed gas, a normally-open gas discharge valve, a normally-closed gas intake valve, a piston assembly coupled to a stem of the hydrant and including a piston plate within a pressure cavity defined in a hold down assembly, the pressure cavity in fluid communication with the normally-open gas discharge valve and the normally-closed gas intake valve, and a biasing element coupled to the stem, the stem connected to a fluid valve of the hydrant;
- closing the normally-open gas discharge valve;
- and
- opening the fluid valve of the hydrant by pressurizing one side of a piston plate of the piston assembly with the compressed air.
Dependencies are inferred from the claim text.