Manual pump for liquid spraying, has top element, provided on piston, structured to intersect cylinder and retain into lodges within cylinder wall

摘要

A manual pump includes a body for containing liquid, a compressed air chamber for expulsion spraying of the liquid, a handle for pressurizing the air chamber, and a cylinder and piston arrangement. The piston includes a top element crossing the cylinder and retained into the lodges within the cylinder wall. The top element also forms a top projection for preventing the piston from escaping out of the cylinder at the end of the piston stroke.