PUMPING DEVICE
First Claim
1. A pumping device including:
- a barrel, enclosing a receiving room and having a top portion, the top portion having a gas hole and a fluid opening, the fluid opening being connected with a fluid tube, a free end of the fluid tube extending into the receiving room;
a pump, including a cylinder and a piston, the piston being movably arranged in the cylinder, the piston partitioning the cylinder into a first space and a second space, the piston having an one-way mechanism, gas in the first space being able to enter the second space via the one-way mechanism, gas in the second space being avoided from entering the first space via the one-way mechanism, the cylinder further having a gas inlet and a gas outlet, the gas inlet communicating the first space, the gas outlet communicating the second space;
a control valve, including a main body and a control element, the main body having a cavity, the main body further having a first hole, a second hole, a ventilation hole, an inlet, and an outlet all communicating the cavity, the first hole and the second hole communicating the gas hole respectively via pipes, the ventilation hole communicating air outside, the inlet communicating the gas outlet of the cylinder via pipe, the outlet communicating the gas inlet of the cylinder via pipe, the control element being movable between a first position and a second position in the cavity;
wherein when the control element is located at the first position, the inlet communicates the ventilation hole instead of the first hole, the second hole, and the outlet, the outlet communicates the second hole instead of the first hole, the ventilation hole, and the inlet;
wherein when the control element is located at the second position, the inlet communicates the first hole instead of the ventilation hole, the second hole, and the outlet, the outlet communicates the ventilation hole instead of the first hole, the second hole, and the inlet.
2 Assignments
0 Petitions
Accused Products
Abstract
A pumping device includes a barrel, a pump, and a control valve. The barrel has a gas hole. The pump includes a cylinder and a piston movable in the cylinder. The piston partitions the cylinder into a first space and a second space. Air in the first space is able to enter the second space via a one-way mechanism, but not in reverse.
The control valve includes a main body and a control element. The main body has a first hole, a second hole, a ventilation hole, an inlet, and an outlet. The first hole and the second hole communicate the gas hole. The inlet communicates the first space, and the outlet communicates the second space. The control element is movable to make the inlet communicate the first hole or the ventilation hole and to make the outlet communicate the ventilation hole or the second hole.
7 Citations
8 Claims
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1. A pumping device including:
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a barrel, enclosing a receiving room and having a top portion, the top portion having a gas hole and a fluid opening, the fluid opening being connected with a fluid tube, a free end of the fluid tube extending into the receiving room; a pump, including a cylinder and a piston, the piston being movably arranged in the cylinder, the piston partitioning the cylinder into a first space and a second space, the piston having an one-way mechanism, gas in the first space being able to enter the second space via the one-way mechanism, gas in the second space being avoided from entering the first space via the one-way mechanism, the cylinder further having a gas inlet and a gas outlet, the gas inlet communicating the first space, the gas outlet communicating the second space; a control valve, including a main body and a control element, the main body having a cavity, the main body further having a first hole, a second hole, a ventilation hole, an inlet, and an outlet all communicating the cavity, the first hole and the second hole communicating the gas hole respectively via pipes, the ventilation hole communicating air outside, the inlet communicating the gas outlet of the cylinder via pipe, the outlet communicating the gas inlet of the cylinder via pipe, the control element being movable between a first position and a second position in the cavity; wherein when the control element is located at the first position, the inlet communicates the ventilation hole instead of the first hole, the second hole, and the outlet, the outlet communicates the second hole instead of the first hole, the ventilation hole, and the inlet; wherein when the control element is located at the second position, the inlet communicates the first hole instead of the ventilation hole, the second hole, and the outlet, the outlet communicates the ventilation hole instead of the first hole, the second hole, and the inlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification