| 摘要 |
A dispensing device in which the product to be dispensed is aspirated and sprayed by the discharge of pressurized air. A valve assembly has a product flow path therethrough and a compressed air flow path therethrough. The valve stem of the assembly is actuated to open the compressed air flow path, and a flap valve is actuated to open the product flow path. Aspirating means is provided at the upper end of said stem for bringing one end of each of said flow paths together. A piston-cylinder assembly is provided on the device having a cylinder with one end around the end of the compressed air flow path, a piston slidable in the cylinder, and a piston rod on said piston and rod on said piston and extending out of the other end of said cylinder. A product container means is connected around the end of the product flow path remote from the aspirating means. The end of the valve stem extends into the cylinder and is engaged by the piston rod for moving the valve stem relative to the valve body for opening the compressed air flow path when the piston is moved to the inner end of the cylinder adjacent the valve assembly to provide a predetermined amount of compressed air. The action of the aspirating means opens the flap valve to draw the product to be dispensed from the product container and dispense it. |
