| 主权项 |
1. A pumping device for compressing gas and providing a vacuum, comprising:
a first head having a first head assembly configured as a vacuum; first and second cylinders coupled to the first head; a first check valve provided between the first head and the first cylinder, wherein the first check valve is configured to allow fluid to flow from the first head into the first cylinder and to prevent fluid from flowing from the first cylinder into the first head; a second check valve provided between the first head and the second cylinder, wherein the second check valve is configured to allow fluid to flow from the first head into the second cylinder and to prevent fluid from flowing from the second cylinder into the first head; first and second pistons disposed in the first and second cylinders; a second head having a second head assembly configured as a compressor; third and fourth cylinders coupled to the second head; a third check valve provided between the second head and the third cylinder, wherein the third check valve is configured to allow fluid to flow from the third cylinder into the second head and to prevent fluid from flowing from the second head into the third cylinder; a fourth check valve provided between the second head and the fourth cylinder, wherein the fourth check valve is configured to allow fluid to flow from the fourth cylinder into the second head and to prevent fluid from flowing from the second head into the fourth cylinder; third and fourth pistons disposed in the third and fourth cylinders; a crankshaft coupled to the first, second, third, and fourth pistons, such that rotation of the crankshaft reciprocates the first, second, third, and fourth pistons in the first, second, third, and fourth cylinders, such that a vacuum is provided at a first head port and compressed fluid is provided at a second head port; a fifth check valve disposed on the first piston, wherein the fifth check valve is configured to allow fluid to flow out of the first cylinder through the first piston and to prevent fluid from flowing into the first cylinder through the first piston; a sixth check valve disposed on the second piston, wherein the sixth check valve is configured to allow fluid to flow out of the second cylinder through the second piston and to prevent fluid from flowing into the second cylinder through the second piston; a seventh check valve disposed on the third piston, wherein the seventh check valve is configured to allow fluid to flow into the third cylinder through the third piston and to prevent fluid from flowing out of third cylinder through the third piston; and an eighth check valve disposed on the fourth piston, wherein the eighth check valve is configured to allow fluid to flow into the fourth cylinder through the fourth piston and to prevent fluid from flowing out of the fourth cylinder through the fourth piston. |
