Patent ID: 8561849

Claim:
A foam spray head assembly comprising: a push head connected with a mounting member; a netted member having a first net and a second net; an air valve having a first groove and a second groove, the air valve having a first end thereof connected to the first net and mounted to the push head, a second end of the air valve connected with the second net; a main plunge being a hollow tube and having a first plunge, a second plunge, a flange portion and a lip, the first plunge located in the second groove and defining a first chamber, a first gap defined between an outer surface of the first plunge and an inner surface of the second groove; a piston unit having a hollow first piston and a second piston, the first piston having a third groove, a fourth groove and a seal ring, an intake slot defined between a top end of the fourth groove and an inner surface of the first groove, a second gap defined between a bottom end of the fourth groove and the flange portion, the seal ring movably contacting the lip of the main plunge, the second piston having a fifth groove and a sixth groove, the second piston connected to the second plunge; a rod unit extending through the main plunge and having a first rod, a second rod and a connection portion, the first rod connected to the second rod by the connection portion, the first rod having an annular flange on a first end thereof and the annular flange movably in contact with an inner surface of the first plunge, the second rod extending through the second piston, the second rod and the sixth groove located in the second plunge, a third gap defined between the rod unit and an inner surface of the second plunge; a resilient member mounted to the second plunge and having an end contacting the flange portion; a cylinder unit connected to the mounting member and having a first cylinder and a second cylinder, a ring located between the first and second cylinders, the first piston movable in the first cylinder and forming an enclosed second chamber, the second piston movable in the second cylinder and forming an enclosed third chamber, and a valve being in contact with an opening of the second cylinder.