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US 4,475,821 AGranted
Mixing chamber
AssigneeBruker Analytische Messtechnik GmbH
InventorsDieter Koch, Wolfgang Risler
Life of this patent
Estimating the term…
Abstract
A mixing chamber for liquids, which are supplied to the mixing chamber in measured quantities one after the other alternating over a period of time, in particular for liquid chromatographs is divided by a fine-pored filter plate (109) into two areas (105, 106). The inlet pipe (111) is connected to one area and the outlet pipe (112) is connected to the other of these areas. The two areas (105, 106) each widen out in a conical shape from the opening of the connected pipe (111) towards the filter plate (109). The filter plate (109) preferably consists of a steel or glass frit with a pore size in the range of 2 to 50 .mu.m.
Claims10
Liquid-mixing apparatus for producing a substantially homogeneous mixture of a plurality of liquids for supplying such mixture to a liquid chromatograph, said apparatus comprising
- a plurality of liquid supply means for supplying a plurality of liquids,
- housing means having inlet means and outlet means,
- liquid measuring time control means connected between said supply means and said inlet means for supplying the liquids in small measured quantities one after the other in succession to said inlet means for repetitive time cycles covering successive periods of time,
- said housing means having a single mixing chamber therein,
- and a single fine-pored filter plate disposed in said mixing chamber and dividing said mixing chamber into a single inlet portion and a single outlet portion,
- said inlet portion of said mixing chamber having a single inlet opening connected to said inlet means,
- said outlet portion of said mixing chamber having a single outlet opening connected to said outlet means,
- said filter plate having a small pore size in the range of two to fifty microns,
- said inlet portion of said mixing chamber widening out between said inlet opening and said filter plate at an opening angle more than 90.degree.,
- said outlet portion of said mixing chamber widening out between said outlet opening and said filter plate at an opening angle more than 90.degree.,
- said filter plate having a diameter substantially greater than the diameter of said inlet opening whereby there is a correspondingly great variation between the maximum and minimum path length between said inlet opening and the various portions of said filter plate,
- said filter plate having a substantially greater diameter than the diameter of said outlet opening whereby there is a correspondingly great variation between the maximum and minimum path length between various portions of said filter plate and said outlet opening,
- said fine-pored filter plate forming a buffer member having an inlet side surface on which substantially uniform liquid pressure builds up and over which surface the liquid flow density is substantially identical,
- said great variations in path length and the small pore size of said filter plate causing substantially homogeneous mixing of the small successive quantities of the liquids supplied to said inlet opening.
11 more elements
A liquid-mixing device for producing a substantially homogeneous mixture of a plurality of liquids supplied in a small measured quantities one after the other in repetitive cycles covering successive periods of time and for supplying said mixture to a liquid chromatograph, said device comprising
- housing means having a single mixing chamber therein, and
- a single fine-pored filter plate disposed in said mixing chamber and dividing said mixing chamber into a single inlet portion and a single outlet portion,
- said housing means having a single inlet opening extending into said inlet portion for receiving the successive small measured quantities of the liquids,
- said housing means having a single outlet opening extending out of said outlet portion for discharging the mixture of the liquid,
- said filter plate consisting of a sintered material having a small pore size in the range of two to fifty microns,
- said inlet portion of said mixing chamber widening out continuously from said inlet opening towards said filter plate at an opening angle more than 90.degree.,
- said outlet portion of said mixing chamber widening out continuously from said outlet opening towards said filter plate at an opening angle more than 90.degree.,
- said filter plate having a substantially greater diameter than said inlet opening and thereby producing a correspondingly great variation between the maximum and minimum path length between said inlet opening and the various portions of said filter plate,
- said filter plate having a substantially greater diameter than said outlet opening and thereby producing a correspondingly great variation between the maximum and minimum path length between various portions of said filter plate and said outlet opening,
- said fine-pored filter plate forming a buffer member having an inlet side surface on which substantially uniform liquid pressure builds up and over which surface the liquid flow density is substantially identical,
- said wide variations in said path length and said small pore size of said filter plate being effective to produce substantially homogeneous mixing of the small measured quantities of said liquids received through said inlet opening.
8 more elements
Liquid-mixing apparatus for producing a substantially homogeneous mixture of a plurality of liquids for supplying such mixture to a liquid chromatograph, said apparatus comprising
- a plurality of liquid supply means for supplying a plurality of liquids,
- housing means having inlet means and outlet means,
- liquid measuring time control means connected between said supply means and said inlet means for supplying the liquids in small measured quantities one after the other in succession to said inlet means for repetitive time cycles covering successive periods of time,
- said housing means having a single mixing chamber therein,
- and a single fine-pored filter plate disposed in said mixing chamber and dividing said mixing chamber into a single inlet portion and a single outlet portion,
- said inlet portion of said mixing chamber having a single inlet opening connected to said inlet means,
- said outlet portion of said mixing chamber having a single outlet opening connected to said outlet means,
- said filter plate having a small pore size in the range of two to fifty microns,
- said inlet portion of said mixing chamber widening out between said inlet opening and said filter plate at an opening angle more than 90.degree.,
- said outlet portion of said mixing chamber widening out between said outlet opening and said filter plate at an opening angle more than 90.degree.,
- said filter plate having a diameter substantially greater than the diameter of said inlet opening whereby there is a correspondingly great variation between the maximum and minimum path length between said inlet opening and the various portions of said filter plate,
- said filter plate having a substantially greater diameter than the diameter of said outlet opening whereby there is a correspondingly great variation between the maximum and minimum path length between various portions of said filter plate and said outlet opening,
- said fine-pored filter plate forming a buffer member having an inlet side surface on which substantially uniform liquid pressure builds up and over which surface the liquid flow density is substantially identical,
- said great variations in path length and the small pore size of said filter plate causing substantially homogeneous mixing of the small successive quantities of the liquids supplied to said inlet opening,
- said filter plate consisting of a sintered material.
12 more elements
Dependencies are inferred from the claim text.