Device for injecting an adjuvant into a liquid
OwnerPhilippe Cloupinventor
Life of this patent
Estimating the term…
Abstract
A device for injecting adjuvant into a liquid employing a stepped piston in a stepped cylinder with a valve in the piston triggered to open and close at opposite ends of the piston travel to cause a reversal of piston movement while a further piston integral with the first mentioned piston operates to pump metered quantities of adjuvant into the stepped cylinder.
Claims6
A device for injecting an adjuvant into a liquid, comprising a body having first and second cylinder portions of different cross-sections with end walls at the ends of the body, one end wall forming a closed end of the first cylinder portion and the opposite end wall forming a closed end of the second cylinder portion, a tubular member connected to said opposite end wall of the body having a bore which forms a chamber communicating with the space within said second cylinder portion, stepped piston means slidingly mounted in said body and having first and second piston portions of different cross-sections corresponding to those of the first and second cylinder portions respectively, a plunger connected to the piston means and slidably disposed in said bore, the cross-section of the plunger being less than the cross-section of the bore to provide for flow of fluid thereabout, means for introducing a first liquid under pressure into said body to one side of said piston means, an outlet conduit from said body, means for introducing a second liquid into said chamber comprising a conduit, a pressure responsive valve closing the conduit against flow of liquid from the chamber, a pressure responsive seal about the plunger which prevents flow of fluid around the plunger into the space within the second cylinder portion when the plunger moves with the piston means toward the space within the first cylinder portion and permits flow of fluid around the plunger as the plunger moves toward said pressure responsive valve, and means responsive to the position of said piston for controlling escape of a metered quantity of liquid and adjuvant through said outlet conduit.
An apparatus for mixing a first liquid with a second liquid comprising a housing enclosing a space having a first cylindrical chamber and a second cylindrical chamber of smaller cross-section than the first chamber, said housing having one end wall which forms a closed end of the first chamber and an opposite end wall which forms a closed end of said second chamber, a tubular member connected to said opposite end wall of the housing having a bore which forms a third chamber communicating with the second chamber, a piston having a hollow body portion slidably disposed in fluid tight relationship in said second chamber and having a flange at one end thereof slidably disposed in fluid tight relationship in said first chamber, a plunger attached to the piston and slidably disposed in said bore, the cross-section of the plunger being less than the cross-section of the bore to provide for flow of liquid thereabout, means for introducing a first liquid under pressure into the second chamber and to move the piston body into the first chamber, means for flow of liquid through the piston from the second chamber to the first chamber comprising an aperture, a valve for opening and closing said aperture, means for moving said valve responsive to movement of said piston whereby the valve is in its closed position when the piston body is disposed adjacent to the closed end of the second chamber, and is in its open position when the piston body has moved to extend partially in the first chamber, a first orifice for flow of liquid from the space enclosed by the housing disposed in the housing adjacent to the juncture between the first and second chambers, a second orifice disposed in said flange for flow of liquid from the first chamber through the flange into the first orifice, means responsive to the movement of said valve for opening said second orifice when the valve is closed and to close the second orifice when the valve is open, means for introducing a second liquid into said third chamber comprising a conduit, a pressure responsive valve closing the conduit against flow of liquid from the third chamber, and a pressure responsive seal about the plunger which prevents flow of fluid around the plunger into the second chamber when the plunger moves with the piston towards the first chamber and permits flow of fluid around the plunger as the plunger moves towards said pressure responsive valve.
Dependencies are inferred from the claim text.