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US 4,054,522 AGranted
Apparatus for exposing a fluid to a negative pressure
OwnerHarry Pinkertoninventor
Life of this patent
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OwnerHarry Pinkertoninventor
Estimating the term…
Apparatus for exposing a fluid to a negative pressure particularly for degassing liquid containing a gas comprises a double acting piston/cylinder unit of which the cylinder is divided into two chambers by the piston, the volume of one chamber swept by the piston being lesser than that swept by the piston in the other chamber. An inlet for a fluid is made to said one chamber, a conduit connects the two chambers and an outlet is made from the other chamber. Valve means are associated with the conduits to permit controlled reciprocation of the piston within the cylinder and fluid passed from said one chamber to the other is exposed to a negative pressure in the other chamber, gas, in the situation in which the fluid is a gas-containing liquid, forming bubbles in the other chamber or, where the fluid is wholly liquid, a part of that liquid being vaporized. The contents of the other chamber are then passed through the outlet from the other chamber to, where the fluid is a gas-containing liquid, a bubble trap in which the gas is separated from the liquid or, where the fluid is wholly liquid, the gaseous phase or vapor will be condensed upon release of pressure and moved through the outlet to be used as required. In a variation the piston/cylinder structure is replaced by a simple receptacle provided with a flexible diaphragm.
Apparatus for exposing a fluid to a negative pressure comprising a receptacle, a partition reciprocable in the receptacle and dividing the receptacle into two chambers, means for reciprocating said partition, means for reducing the effective volume swept during reciprocation by said partition in one chamber to be lesser than that swept by said partition in the other chamber, an inlet to said one chamber for the admission of a fluid, conduit means connecting said one chamber and said other chamber to provide liquid communication between said chambers, a fluid outlet from said other chamber and interconnected valve means cooperating with said inlet, said outlet and said conduit means to permit controlled reciprocation of said partition within the receptacle, fluid passed through said conduit from said one chamber to said other chamber expanding to occupy the larger volume of said other chamber by the formation of bubbles in said fluid.
A hemodialysis system comprising means for preparing a dialysate solution and apparatus for degassing that solution comprising a receptacle, a partition reciprocable in the receptacle and dividing the receptacle into two chambers, means reducing the effective volume swept by said partition, in one chamber to be lesser than that swept by said partition in the other chamber, an inlet to said one chamber for the admission of said solution, conduit means connecting said one chamber and said other chamber, an outlet from said other chamber and interconnected valve means cooperating with said inlet, said outlet and said conduit means to permit controlled reciprocation of said partition within the receptacle, gas entrained in said solution passed from said one chamber to said other chamber forming bubbles to occupy the larger volume of said other chamber and means connecting said outlet to a device for separating said gas the liquid, a liquid outlet from said device being connectable to a dialysis cell.
The method of exposing a fluid to a negative pressure within a closed system which comprises delivering a determined volume of that fluid to a first chamber, making a connection from that first chamber to a second, larger chamber, causing said determined volume to be transferred and expanded, through said connection, to fill said second chamber.
A method of degassing a liquid in a closed system which comprises delivering a determined volume of said liquid to a first chamber of a closed system, making a connection from that first chamber to a second larger chamber of the system, causing said determined volume to be transferred, through said connection, to said second chamber, to expand in said chamber and release a gaseous phase and thereafter, passing said liquid and gaseous phases from said second chamber to separating means.
Dependencies are inferred from the claim text.