Abstract: A spray unit that is attached to an opening at a neck portion of a container for spraying a liquid material in the container, including: a cylinder unit composed of a large-diameter air cylinder and a small-diameter liquid cylinder having a valve hole and an operating member. The operating member is composed of a large-diameter cylindrical piston, a stem having a check valve, and a press-down head having a spray nozzle hole. The liquid is to be sprayed when the operating member is pressed down. When the operating member is pressed down, a liquid flow-out path and an air ejecting path come together via a small gap inside the spray nozzle hole. The spray unit further includes a flow rate control valve is composed of a valve seat provided at an upper face of a valve hole of the liquid cylinder and a valve body arranged above the valve seat to be seated on or released from the valve seat.

Abstract: A manually operated spray device for spraying a liquid in a vessel comprises a cylinder member which includes an upper air cylinder and a lower liquid cylinder, an air piston slidably fitted in the air cylinder, and a suction pipe connected to the liquid cylinder within the vessel toward the bottom thereof. An actuator member is urged upwards and vertically movable relative to the cylinder member; and includes a hollow stem protruding upwards from the liquid cylinder and fitted at its center portion with the air piston, a press head fitted onto the upper portion of the stem, a nozzle hole opening at the side surface of the press head, and first and second passages merging with each other on the upstream side of the nozzle hole. The first passage is communicated with the air chamber on one side of the air piston, and the second passage is communicated with the liquid cylinder through the interior of the stem.