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US 4,231,990 AGranted
Apparatus for the treatment of fluids
AssigneeS.A. Anarec
InventorChristian F. Jottier
Life of this patent
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AssigneeS.A. Anarec
InventorChristian F. Jottier
Estimating the term…
A reactor for preparing and analyzing fluids comprising means for taking a determined dose of a sample and transferring it in an air-tight chamber, means for taking, if necessary, a determined dose of a diluent and transferring it in the same chamber, means for taking at least one determined dose of a reagent and for transferring it in the same chamber, means for mixing the sample with the reagent or the reagents together with a diluent (if necessary) out of contact with the atmosphere, as well as means for transferring the obtained mixture of solutions to any system for detecting the result or for transferring part of said mixture to another reactor or to another use device.
An apparatus for the treatment of fluids comprising a single air-tight chamber having a variable inner volume, in which at least two fluids may be introduced and treated and from which the fluids may be removed after treatment, a reciprocable piston which tightly closes one end of said chamber, at least two inlet pipes or ducts connected at one end to said chamber and at the other end to a fluid source, a valve being inserted in each of said inlet pipes or ducts near the end thereof connected to said chamber, an outlet pipe equipped with a valve near the end thereof connected to said chamber, means for moving the reciprocable piston and means for selectively opening and closing the valves inserted in said inlet and outlet pipes, a predetermined amount of each fluid being selectively introduced into said chamber via said selectively opened valves inserted in said inlet pipes or ducts by means of a depression or suction created in said chamber, said moving means being operable to move said piston along a predetermined stroke in a direction causing an increase in the inner volume of said chamber to create said suction, the treatment of the fluids in the chamber being effected when all the valves inserted in the inlet and outlet pipes are closed, and the removal of the treated fluids from the treatment chamber being effected via said selectively opened valve inserted in said outlet pipe by the pressure created in said chamber by the piston when the latter is moved in an opposite direction causing such a decrease of the inner volume of the chamber that said inner volume is entirely occupied by the piston.
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
For supplying the samples to flow-through analysers: characterised by the valves
Investigating or analysing non-biological materials by the use of the chemical methods
Plural, sequential, valve actuations: variable cycle
Investigating or analysing materials by determining their chemical or physical properties
Term ended 21 Aug 1998 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
Apparatuses for the treatment of fluids, such as automatic apparatuses for analysis or reactions using chemical products, are known. These known apparatuses frequently have drawbacks. Thus, in the known analysis apparatuses, the mixing of the sample to be analyzed with the reagent or reagents generally takes place in an atmospheric medium. Moreover, said known apparatuses commonly need distinct means for taking the sample to be analyzed, for distributing the reagent or reagents, and for diluting and conveying the obtained mixture or solution to the detection or treatment device.
An object of this invention is an apparatus for the automatic treatment of fluids, in which all the processing steps are performed under shelter of the atmosphere according to a predetermined sequence or program.
The term "treatment", as used in the present specification and claims, means any physical or chemical process, in which at least two fluids are contacted with each other. Among such treatments may be cited, as non limitative examples, the mixing of fluids, the analysis of chemical products (liquids and gases or solids), the synthesis of chemical compounds and the like.
Other details and features of the invention will appear in the following description of embodiments of the apparatus according to this invention, said embodiments being described by way of non limitative examples.
In said description, reference is made to the attached drawings, in which:
FIG. 1 shows diagrammatically a first embodiment of an apparatus according to this invention;
In the various figures, the same references are used for designating identical or similar elements.
In the following description, the invention is illustrated by an analysis apparatus, but it must be understood, as already pointed out, that the invention is not limited to such an analysis apparatus and may be used for other physical and/or chemical operations or processes.
The apparatus represented in FIG. 1 comprises a body 1 which contains a chamber 2, wherein a piston 3 may be subjected to a linear or reciprocating movement by a step-by-step motor 4, by means of a rack system 5 and a speed-reducing gear 6.