Patent ID: 6073645
Filing Date: 2000-06-13
Classification: F04B,Y10T

Abstract:
A pumping device comprising:a main body having a passage defined therein through which air passes,a head including a first end and a second end, the second end of the head being communicated with the passage,a pivotal tube secured to the main body and rotatably received in the first end of the head, the pivotal tube including a hollow cam seat securely mounted therein, the cam seat including a central rotating axis relative to the first end of the head, the cam seat including a first side with a first opening and a second side with a second opening communicated with the first opening, a distance from the central rotating axis of the cam seat to the first side being smaller than a distance from the central rotating axis of the cam seat to the second side,a retainer slidably received in the head and including a first compartment therein, a first end, and a second end, the second end of the retainer including a conical recess defined therein, a spring being mounted in the first compartment, a nozzle being slidably mounted in the second end of the retainer and including a first end attached to the spring and a second end, a pin being slidably mounted in the retainer and including a first end extended beyond the first end of the retainer and a second end secured to the nozzle to slide therewith,the second opening of the cam seat being sized to be smaller than the first end of the pin to prevent the first end of the pin from passing through the second opening, the first opening of the cam seat being sized to be larger that the first end of the pin to allow the first end of the pin to pass through, anda nozzle head securely mounted in the second end of the head and including a second compartment communicated with the first compartment via the nozzle, the nozzle head including a hollow conical section for engaging with the conical recess of the retainer.