Manually operated miniature atomizer

Claim 1

Pressure controlled sprayer apparatus comprising: a container for dispensing fluid; a dispensing outlet; component means comprising a closure body connected to the container, a downwardly disposed third cylinder, vent means, and a valve seat in the lower end of the third cylinder wherein check valve means is loosely retained in place in the lower end of the third cylinder; a dip tube extending into the container and connected to the third cylinder; and further comprising first and second tubular members, said first member having first and second ends with a first tubular piston formed on said first end and first and second cylinders of different cross section formed on said second end, said second member having first and second ends with a third tubular piston and a fourth piston formed, respectively, on said first and second ends, said third tubular piston being inserted in and slidable in said first cylinder, said first tubular piston being slidable in said third cylinder; a second tubular piston formed on the second end of said first tubular piston and being slidable in said fourth cylinder; actuator means for actuating the first and second tubular members so as to dispense the fluid from the container through the dispensing outlet, valve means associated with said third cylinder and with said third tubular piston and providing a variable volume chamber including portions at least of said second and third cylinders and the interior space of said first and second tubular members, and resilient means biasing said first tubular piston to a predetermined position in said third cylinder, said predetermined position providing substantially maximum volume of said chamber.