US 2652234 A
Description (OCR text may contain errors)
Sept. 15, 1953 B. FELDMAN 2,652,234
HOMOGENIZER Filed Feb. 27, v1951 Patented Sept. 15, 1953 HOMOGENIZER .":Bernard Feldmann, Rehovoth, Israel ApplicatioriFbruary 27, 1951,
Ihis invention relates to homogenizersiforluse in the preparations :ofJ emulsions of liquids lnon- `miscible with one another, pastes; etofandniore particularly to homogenizers ofi the'kind wherein two or moresubstancesol"` different specicgravf ity in the'form of liquids, `pastes o-r suspensions 'another known kind the1annu1ar conical orifice is `formed between male and female conical-members one-of which is appliedvagainst `the other l one by spring pressureyandlifted therefromonly temporarily under the impact of the matter to be homogenizedwhichv is fed Ato the homogenizer underpressure. Apparatusof both kindsinclude,
am'ong the essential constituent parts '1 of the homogenizing system, members thatl are movable, and are in fact in movement, in the normal operation of the apparatus.
This invention has the object to provide a lhomogenizer with annular conical homogenizing orice wherein the elements of the homogenizing system proper remain immovable during the operation, with a View to rendering the apparatus less liable to wear and tear, making it easy to clean and capable of homogenizing, without clogging, such particles in liquid suspension as have undergone a superficial preliminary mixing only, and enabling the apparatus to run at high speed on very little power.
The invention consists in a homogenizer comprising an annular conical orifice defined between male and fem-ale conical members arranged to remain motionless in the normal operation of the lhomogenizer, and a feed channel including one or more spiral guide members leading to said orice.
It is preferred to make at least one of the conical members axially adjustable for allowing variation of the width of the conical orice.
The matter to be homogenized is forced under pressure into the feed channel where it undergoes preliminary intimate mixing and is imparted a spirally rot-ating motion with which it enters the homogenizing system proper, i. e. the annular conical orice between the stationary male and female conical members. Variation of the particle size of the homogenized mixture is obtained by adjustment of the width of the orifice. Where ya rotary pump of the intermeshing type is used for feeding the matter to the homogenizer a furf chamber, .andi a feedfchanneli 4.
,- chamber 3 adjoining ther 'preliminary .mixing l step i is l added toi` the homogeni'zing operation which improves the 'homogenization and decreases the required feeding pressure and poweroonsumpton.
A lhomogenizeraccording to the inventionis illustrated, by way ofv example only, in thefaccompanyingdrawing which shows an axial section thereof, it beinglunderstood l that thelinventi'onfcan be carried out in practice in lmany different forms.
` Theapparatus here illustratedV by Vway of example comprisesfan oblong mainbody I,e.g. of cylindrical form, having athroughgoing bore includingthree sections, namely, a delivery cham- .ber 2,;at one' end,1a tapped median part 3 which a'coommodatesthe homogenizing system proper and is, therefore, referredto as homogenizing ,'Therlatter opens into ma tubular ,l-'socket t5 rwhich `:is A'internally I.threaded uforrffconnection with `the feeding; Ppipe (not illustrated). The chamber 2 is sealed by a lid formed by a plug 6 made integral with a boss l. A spindle 8 extends through the body i and boss 'I out of the latter and carries on its projecting end a handle 9. The joint between the spindle and boss is tightened by a gland I G. The bore of the plug 6 and boss is tapped for the reception of a threaded length I I of the spindle. A plug I2 is screwed into the homogenizing chamber 3. It has an axial bore bounded by two female conical surfaces which merge into one another with their narrower ends while their wider ends lead, respectively, to the delivery chamber 2 and to the end of the homogenizing the feed channel ll. Within the conical part of the bore adjoining the delivery chamber the spindle is made integral with a conical body I3, an annular conical orifice I4 being dened between the surfaces of parts I2 and I3 which latter constitute the female and male members, respectively, of the homogenizing sysm tem proper. The width of the orifice I4 can be varied by axial displacement of the spindle produced by screwing it up or down. The part of the spindle located in the feed channel is made integral with one or more spiral guide ribs i5. Finally an outlet I6 for the homogenized matter is laterally branched off from chamber 2.
The matter to be homogenized, which may be collected in a suitable feeding funnel or the like (not shown) is forced by means of any suitable injector or pump (not shown either) into the feed channel and through the spiral ducts defined by the rib or ribs I5 where it undergoes a preliminary intimate mixing and is imparted a spirally rotating movement with which it enters the conical bore of plug l2 adjoining the feed channel where it is given a centripetal rotary flow into the conical homogenizing oriiice I4. From the latter the homogenizedv mass leaves through the delivery chamber 2 and outlet I6.
The foregoing description shows that the homogenizer according to the invention is of extreme simplicity and robustness which enables it to perform under conditions of high endurance. easily be dismounted.
l. A homogenizer comprising an oblong main body with through-going cylindrical bore including three coaxial sections, said sections constituting a feed channel, an internally threaded hornogenizing chamber of larger diameter than the feed channel, and a delivery chamber of larger diameter than the homogenizing chamber; a plug closing the body at the end adjoining the delivery chamber and having a tapped bore coaxial with the bore of the body; a spindle extending through the bores of the body and plug projecting out of the plug, a handle on the projecting portion, the spindle including a threaded length screwed into the tapped bore of the plug; a second plug including a `conical female surface `coaxial with the bore of the body screwed into the homogenizing chamber; at least one spiral guiding rib made integral with the portion of the spindle located in sidev the feed channel; a conical male member on the portion of the spindle adjacent the guiding rib and located inside the homogenizing chamber for cooperation with said female surface; and a lateral outlet branched off from the delivery chamber.
2. A homogenizer comprising an oblong main body with through-going cylindrical bore including three coaxial sections of different width,
For cleansing the spindle and plug l2 can said sections constituting in sequence a feed channel, an internally threaded homogenizing chamber of larger diameter than the feed 4channel, and
a delivery chamber of larger diameter than the homogenizing chamber; a plug closing the body at the end adjoining the delivery chamber and having a tapped bore coaxial with the bore of the body;
a spindle extending through the bores of the body and plug and projecting out of the plug, a handle on the projecting portion, the spindle including a threaded length screwed into the tapped bore of the plug; a second plug screwed into ber and having an axial the homogenizing chambore bounded by two female .conical surfaces merging into each other with their narrower ends and leading at their wider ends, respectively,
to the delivery chamdle adjacent the guiding rib and located inside the homogenizing chamber for cooperation with the female conical surface leading to the delivery chamber, and a lateral outlet branced off from the delivery chamber.
References Cited in the file of this patent UNITED STATES PATENTS Number Number