Fluid apparatus including gravity induced check valves and downwardly inclined lower lamella portion of a bellows
First Claim
1. A fluid apparatus having a bellows, configured as a pump and placed in a pump body, said bellows being extendingly and contractingly deformable in an axial direction said axial direction defining a vertical axis, a liquid chamber formed inside said bellows, a suction port and a discharge port formed in an inner bottom face of said pump body facing said liquid chamber, said suction port and said discharge port communicating with an inflow passage and an outflow passage which are disposed in said pump body, respectively, anda suction ball type check valve and a discharge ball type check valve are disposed in said inflow passage and said outflow passage, respectively, wherein liquid is sucked from said suction port via said suction ball type check valve into said liquid chamber by extension of said bellows, and the liquid in said liquid chamber is discharged from said discharge port via said discharge ball type check valve by contraction of said bellows, each of said suction ball type check valve and said discharge ball type check valve is configured so that a cylindrical valve casing is disposed with setting an axis vertical, and a ball valve element is caused by own weight to be closely contacted with a valve seat in said valve casing, thereby preventing liquid from reversely flowing;
- and said discharge ball type check valve is disposed on a downstream end of said outflow passage.
1 Assignment
0 Petitions
Accused Products
Abstract
A bellows that is extendingly and contractingly deformable in the axial direction is placed in a pump body, and a liquid chamber is formed inside the bellows. A suction port and a discharge port are formed in an inner bottom face of the pump body facing the liquid chamber. Liquid is sucked from the suction port into the liquid chamber by extension of the bellows, and the liquid in the liquid chamber is discharged from the discharge port by contraction of the bellows. In each of a suction ball type check valve disposed in the suction port, and a discharge ball type check valve disposed in an outflow passage which communicates with the discharge port, a cylindrical valve casing is disposed, and ball valve elements in the valve casing are caused by their own weight to be closely contacted with valve seat, thereby preventing liquid from reversely flowing.
7 Citations
2 Claims
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1. A fluid apparatus having a bellows, configured as a pump and placed in a pump body, said bellows being extendingly and contractingly deformable in an axial direction said axial direction defining a vertical axis, a liquid chamber formed inside said bellows, a suction port and a discharge port formed in an inner bottom face of said pump body facing said liquid chamber, said suction port and said discharge port communicating with an inflow passage and an outflow passage which are disposed in said pump body, respectively, and
a suction ball type check valve and a discharge ball type check valve are disposed in said inflow passage and said outflow passage, respectively, wherein liquid is sucked from said suction port via said suction ball type check valve into said liquid chamber by extension of said bellows, and the liquid in said liquid chamber is discharged from said discharge port via said discharge ball type check valve by contraction of said bellows, each of said suction ball type check valve and said discharge ball type check valve is configured so that a cylindrical valve casing is disposed with setting an axis vertical, and a ball valve element is caused by own weight to be closely contacted with a valve seat in said valve casing, thereby preventing liquid from reversely flowing; - and
said discharge ball type check valve is disposed on a downstream end of said outflow passage. - View Dependent Claims (2)
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Specification