Patent ID: 8561919

Claim:
A spray head assembly comprising: a head having a nozzle connected thereto and a space defined in the head, a filter tube located in the space; a first piston unit being a hollow part and having a top opening and a bottom opening in two ends thereof, a sealing member located in the bottom opening; a valve unit having a first valve and a second valve, the first valve having a first end connected to the first piston unit and a second end of the first valve connected to the filter tube and the head, the second valve having a first end connected to the first valve and mounted to the first piston unit, the second valve having a flange which is separated from the sealing member to form an intake path when the first valve moves toward the second valve; a link having a tubular portion which extends through the second valve, multiple grooves defined axially in an outer surface of the tubular portion, a stop flange extending radially from an end of the tubular portion; a second piston unit slidably mounted to the link and movable along the link to seal the grooves or to allow the grooves to be exposed; a cylinder having a top chamber and a bottom chamber, an inner diameter of the top chamber being larger than that of the bottom chamber, the bottom chamber accommodating the second piston unit and the link, a through hole defined through the bottom chamber; a resilient member located in the top chamber of the cylinder and contacting between the second valve and an inner end of the top chamber of the cylinder, and a resilient valve being a spiral valve and located in the bottom chamber of the cylinder, the resilient valve movable to seal or open the through hole.