Fruit juicer

Abstract: Fruit juicer, which comprises a feeding duct or feed hopper (6); a fruit carrier rotor (7) located after said hopper; a vertical cutter (8) secant to the rotor (7) in its middle transversal plane; two horizontal secant squeezing cylinders (9,10) with complementary male and female sections; rotating in opposite directions; and collecting means (32) of the juice squeezed out and of the rind of the fruit, located under the squeezing cylinders. The male squeezing cylinder (9) has a multilobular section, while the female squeezing cylinder (10) has longitudinal channels with a section approximately identical to that of the lobes of the male squeezing cylinder (9).

Description: The present invention refers to a fruit juicer especially conceived to squeeze citrus fruit, obtaining a clear juice with the minimum contamination of the juices contained in the rind. The machine of the invention is especially for use in establishments where the consumption of juice may be high, but the amount of juice to be consumed each time must be produced precisely at that moment. Spanish utility model 263,636 already discloses a citrus fruit juicer, which comprises a containing hopper, a mechanism that supplies oranges to a plate-guide, an orange cutter cutting the orange into two halves, means to place the halves in the position to be squeezed and presses to squeeze the halves of the fruit and extract the juice. However, this type of machine has a complicated structure and operation, due to the large number of mechanisms and parts that it includes. Spanish patent no. 8800970 discloses a fruit juicer with a simpler construction, which also includes a fruit storage element, a fruit supplying device, a cutter that divides the fruit into two identical halves, and means to press the halves of the fruit and extract juice. Although simple, this machine is still too voluminous, especially since it has to have outlets on both sides for the rind. Besides, the squeezing mechanisms have, due to their special shape, certain problems for cleaning, as there are angular areas where pulp deposits are formed and they are hard to clean. On the other hand, the fruit is cut by pressure, pushing the fruit against the cutting edge of the blade, a system which can cause partial crushing of the fruit and, with this, extraction of certain juices contained in the rind, that may turn out to be undesirable for the juice that is to be extracted. The object of the present invention is a fruit juicer, especially to squeeze citrus fruit, with a simple construction, comprised of a reduced number of parts, in comparison with traditional machines. This quality results in a lower cost and better operation. Besides, due to the reduced number of parts that make up the squeezing mechanisms and their special design, the cleaning operations can be carried out with the maximum guarantees of safety and effectiveness, a circumstance which is also enhanced by the simple shapes of the parts that make up the squeezing mechanisms. Another advantage of the juicer of the invention is that it makes it possible to obtain juices as pure as possible, without contamination of juices, acids, etc. contained in the rind. The juicer of the invention comprises a frame that delimits in the top part a front chamber, wherein the mechanisms that handle and squeeze the fruit are housed, and a rear chamber that houses the operating mechanisms. In the bottom part the frame forms a chamber with means to collect the juice extracted and rind. A fruit containing element that can consist of a hopper or feeding duct reaches the front top chamber. The mechanisms for handling the fruit and extracting the juice comprise a fruit carrier rotor with a horizontal shaft and axial blades; a vertical cutter facing the fruit carrier rotor, to which it is secant in its middle transversal plane, at the descending side of the rotation path of said rotor; and two secant squeezing cylinders with parallel horizontal shafts, complementary constant male and female sections, both rotating in opposite directions. Beneath the squeezing cylinders are the mechanisms for collecting the extracted juice and the rind. The outer fruit feeding hopper or duct empties on to the carrier rotor which fastens between each two consecutive blades a cavity that is dimensioned to receive and house at least partially one piece of fruit. Upon the rotor turning, the cavities successively pass under the mouth of the feed hopper or duct, receiving a piece of fruit and peripherally carrying it during rotation thereof until it faces the cutter. The blades that delimit the cited cavities have, from the outer edge, a longitudinal groove through which the cutter penetrates to the core of the rotor. With this construction, upon the rotor continuing to turn, the fruit faces the constant edge of the cutter, resting against the same, the fruit being pressed and at the same time slid downward with regard to the cutter, causing the progressive cutting of the fruit, up to all of it, due to the penetration of the cutter into the rotor. The male and female squeezing cylinders have complementary sections that are consecutively interlinkable between each other during the rotation of said cylinders. The male squeezing cylinder has a multilobular section, with anglewise equidistant projecting lobes with an arched contour. For its part, the female squeezing cylinder has identical longitudinal channels, anglewise equidistant and with a curved section approximately equal or slightly larger than that of the lobes of the male squeezing cylinder. The female squeezing cylinder remains located below the carrier rotor, in such a way that it receives in each one of the longitudinal channels the two halves of each piece of fruit cut. The female rotor turns in such a way that it peripherally carries the two halves of the fruit upon coming up against the male cylinder, which will cause, in the coupling stage of the corresponding shapings of both cylinders, the pressing and total squeezing of said halves. The surfaces of the interlinkable shapings of the squeezing cylinders remain slightly separated from each other, in the positions of maximum coupling, an amount approximately equivalent to the thickness of the rind of the fruit, whereby there is no pressing and squeezing of this rind. The blade will preferably have a curved-concave cutting edge, inclined downwards towards the carrier rotor. The cutting edge will form at the bottom an extension which is that which penetrates into the rotor, to the core of the same, through the grooves of the blades. The collecting means of the juice and rind consist of superimposed top tray and a bottom drawer, both removable through the front of the juicer, which are located under the squeezing cylinders, the bottom drawer extending in the rear beyond the top tray. Above the tray there is a rind retaining grating. The tray has an inclined bottom which leads towards an outlet hole and has a filtering cover mounted on it. The above mentioned grating slides backward, above the tray, inclined downward and slightly extends beyond said tray to lead the rind behind the same towards the bottom drawer. The construction, characteristics and advantages of the juicer of the invention can be more easily understood by means of the following description, made with reference to the attached drawings, wherein a possible embodiment, which is a non-restrictive example, is shown. In the drawings: Figure 1 is a perspective view of a juicer formed in accordance with the invention. Figure 2 is a side view, according to direction A-A of figure 1, wherein the covers that close the top front and rear chambers have been eliminated. Figure 3 is a front raise view of the juicer of figure 1, without the cover of the squeezing mechanisms chamber. Figure 4 is a side raised view of the juicer, according to direction B of figure 1, wherein the cover of the top chambers has been eliminated. Figure 5 is a schematic front raised view of the transmission system of the operation mechanism. Figure 6 is a perspective piece view of the carrier rotor and of the cutter. Figures 7 and 8 are perspective views of the female and male squeezing cylinders, respectively. The juicer shown in figure 1 includes a frame with a general prismatic shape, which delimits above two chambers, a front one, reference number 1, wherein the mechanisms that handle and squeeze the fruit are housed, and another rear one indicated with reference number 2, wherein the operation mechanisms are housed. Under these chambers a bottom compartment or chamber (3) where the means for collecting the juice and rind are located is formed. One can have access to the top chamber (1) by taking off the cover (4), which can be fastened, for example, by screws or any other system. Cover (4) is passed through by a fruit feeding duct or hopper, having reference number 6. As can be seen better in figures 2, 3 and 4, a fruit carrier rotor with a horizontal shaft, of reference number 7, a vertical cutter 8, facing the carrier rotor secant to the same in its middle transversal plane, and two secant squeezing cylinders with parallel shaft and a constant section, one of which of a male section, of reference number 9 and the other with a female section, of reference number 10, are housed in the top front chamber (1.) The structure of these components will be explained upon referring to figures 6 to 8. The rotor (7), figure 6, is comprised of a center body (11) and two end closing covers (12.) The body (11) has a cylindric contour and has, all along it, identical recesses (13), with a curved-concave section, anglewise equidistant, that are separated by partition walls or axial middle blades (14) that widen slightly towards the free edge thereof. The covers (12) are truncated-cone shaped, with the conical surface (15) directed towards the center body (11.) This center body has an axial drilled hole (16) with a cotter hole for assembly thereof in the corresponding shaft (17.) As can also be seen in figure 6, the center body (11) has, from the free edge of the blades (14), a peripheral center groove (18) that partially penetrates into the core of the body (11.) The cutter (8), that has an arched cutting edge, inclined downward towards the rotor (11) and finished at the bottom with an extension (20) which is that which partially penetrates into the core of the body (11) of the rotor , will penetrate through this groove. With the cited structure , the channels (13) of the rotor, closed by means of end covers (12), delimit dimensioned housing to receive fruit (21), figure 3, that is supplied through the hopper or duct (6.) The female cylinder (10), represented in figure 7, has four identical longitudinal channels (22), with a section whose shape is approximately that of a circular arch, that remain separated by partition walls (23.) This cylinder (10) has an axial through hole (24) with a cotter hole for assembly thereof in the shaft (25), figure 3. The male squeezing cylinder (9), represented in figure 8, has a multilobular section and has, in the example described, three projecting lobes (26), which are identical and sideways equidistant. Each one of these lobes has a circular arched shape contour, with an angular width preferably larger than 180 º , every two consecutive lobes remaining separated by narrow sections (27.) The male squeezing cylinder (9) also has a center longitudinal drilled hole, with a cotter hole, for assembly thereof in the corresponding shaft with reference number 29 in figure 3. The rotor, as can be seen in figure 3, is located so that the fruit (21) supplied by the hopper or duct (6) successively occupies, while said rotor rotates, the cavities or recesses (13) thereof. The rotor (7) turns clockwise, so that the fruit (21) is carried peripherally towards the cutter (8), against whose cutting edge (19) the fruit rests and moves downward, until the diameteral cutting thereof is achieved. The female squeezing cylinder (10) is located below the rotor (7), in such a way that the halves (30) of pieces of fruit produced by the cutting of the fruit fall into the channels (22) of said cylinder. The female cylinder (10) and the male cylinder (9) turn in the opposite direction, the first one doing so counterclockwise, so that the halves (30) of the pieces of fruit are carried peripherally towards the lobes (26) of the male squeezing cylinder. The rotation of the cylinders (9) and (10) is synchronized in such a way that in each channel (22) of the female squeezing cylinder a lobe (26) penetrates in order to cause the crushing of the two halves (30) of the piece of fruit, squeezing them totally, without squeezing the rind hardly at all, for which purpose the surfaces of the lobes (26) and channels (22) are consecutively coupled remaining slightly separated from each other, an equivalent amount, approximately that of the width of said rind. As can be better seen in figure 4, a bottom drawer (31), a rind collector and a fruit collecting tray (32) are placed in the bottom chamber or compartment (3.) The chamber (3) has at the top, under the squeezing rollers (9) and (10), an opening (33), with inclined planes that lead towards a grating (34) that runs above the tray (32), inclined downward and backward. This grating (34) will preferably consist of horizontal transversal rods, for example that rotate freely. The juice that is extracted passes through the grating (34), as well as a filter cover (35) located over the tray (32), reaching the bottom of the same, that is inclined towards an outlet hole (36), under which the duct (37) that extends outside originates, figure 1, to obtain the extracted juice. The rind will also fall on the grating (34) over which it will slide until it falls into the collecting drawer (31.) The tray (32) as well as the drawer (31) can be removed from the front, so that they may be cleaned and the filtering cover (35) may be separated from the tray (32), just like the top grating (34.) In this same way, the squeezing mechanisms may be cleaned easily by simply removing the cover (4.) An operating motor (38), figures 2 and 3, is located in the rear chamber, as well as a reducing mechanism (39) and a series of toothed operating wheels that are represented in figure 5 and that include a first pinion or wheel (40), which is linked to the reducing mechanism (39) and that fits into a toothed wheel (41), which is linked to the shaft of the male squeezing cylinder (9.) The toothed wheel (41) in turn fits into a toothed wheel (42) that is linked to the shaft (25) on which the squeezing roller (10) is mounted. Finally, this wheel fits into the toothed wheel (43), linked to the shaft (17) on which the rotor (7) is mounted. In the example represented in the drawings, the rotor (7) and the female squeezing cylinder (10) turn at the same speed, as they have the same number of longitudinal recesses. On the contrary, the rotation speed of the squeezing roller (9) will be somewhat faster than that of the female squeezing roller (10), upon having a smaller number of lobes (26) than channels (22.) As can be seen in figure 1, the female squeezing cylinder is closed at the front by means of a disk (44.) The juicer has starting and stopping switches or controls (46) in the bottom body (4.) As can be seen in figure 3, the juicer may have an oscillating cleaning blade, which has a handle that projects from the frame of the juicer for operation thereof. This blade runs parallel to the male squeezing cylinder (9) and in its inoperative position it is slightly separated from the same. Through the projecting handle, the blade can be moved until it rests longitudinally on the surface of the cylinder (9), separating the portions of rind or pulp that can remain adhered to the same, thus this blade serves as a cleaning device. As can be understood, the frame can have a structure different from the one described. This is also true for the cover (4) of the same.

Claims: Fruit juicer, provided with an outer feeding duct or hopper (6), comprising a fruit carrier rotor (7), with a horizontal shaft and axial blades; a vertical cutter (8), opposite and secant to the fruit carrier rotor in the middle transversal plane thereof, at the descending side of the path of rotation of said rotor; two secant squeezing cylinders (9, 10) with parallel horizontal shafts, with constant complementary male (9) and female (10) sections, both rotating in opposite directions; and means to collect the extracted juice and the rind, located under the squeezing cylinders; whose rotor (7) is located under the mouth of the feeding duct or hopper (6) and it determines, between every two consecutive blades, a recess (13) dimensioned to partially house a piece of fruit, carrying it peripherally during rotation thereof until it faces the cutter (8), said blades having, from the end edge, a longitudinal groove (18) through which the blade passes to the core of the rotor; and whose male and female squeezing cylinders have complementary sections that are consecutively interlinkable together during rotation of said cylinders, the female cylinder being located under the carrier rotor, in order to receive the cut fruit and peripherally transport it towards the male cylinder in order to squeeze the same. Juicer, according to claim 1, characterised in that the male squeezer cylinder has a multilobular section, with anglewise equidistant projecting lobes (26) with an arched contour. Juicer, according to claim 2, characterised in that the male squeezing cylinder includes three circular arch-shaped lobes with an angular width preferably greater than 180 º , separated by middle narrow sections. Juicer, according to claim 1, characterised in that the female squeezing cylinder has identical longitudinal anglewise equidistant channels (22), with a curved section approximately identical to that of the lobes of the male squeezing cylinder. Juicer, according to claim 4, characterised in that the female squeezing cylinder has on its surface four longitudinal channels, with a section having approximately a circular arch shape, that remain separated by longitudinal radial partition walls (23) that widen slightly towards the longitudinal edge thereof. Juicer, according to the above claims, characterised in that the shafts of the squeezing cylinders are separated from each other slightly larger than the sum of the radii of said cylinders, in such a way that during the rotation thereof the lobes of the male cylinder successively penetrate into the the opposite channels of the female cylinder, their surfaces remaining separated a distance approximately equivalent to the thickness of the rind. Juicer, according to claim 1, characterised in that the cutter has a curved-concave cutting edge inclined downward towards the carrier rotor, whose edge forms at the bottom part an extension (20) that penetrates into said rotor, up to the core of the same, through the grooves of the blades. Juicer, according to claim 1, characterised in that the carrier rotor consists of a center body (11) and two end closing covers (12); whose body has a cylindric contour and has all along it identical recesses with a curved-concave section, anglewise equidistant and dimensioned to house, at least partially, a piece of fruit in each recess; and whose covers have a truncated cone shape and are abutted against the end section of the center body, closing sideways the recesses, with the conical surface (15) facing said body. Juicer, according to claim 1, characterised in that the means for collecting the juice and the rind consist of a top tray (32) and a bottom drawer (31), both removable, and a rind retaining grating (34) placed above the tray; whose tray remains located under the squeezing cylinders, having an inclined bottom that leads towards an outlet hole (36) and has a filtering cover (35) mounted thereon; and whose bottom drawer extends backwards beyond the tray in a section where the rind is collected; and whose grating runs backward above the tray, inclined downward, and slightly extending beyond said tray to lead the rind to the bottom drawer.

Inventors: DEZA SAN BAUDILIO FERNANDO, DEZA SAN BAUDILIO FLORENTINO, ETAYO JUBERA FRANCISCO, JIMENEZ MARTINEZ JESUS, DEZA SAN BAUDILIO, FERNANDO, DEZA SAN BAUDILIO, FLORENTINO, ETAYO JUBERA, FRANCISCO, JIMENEZ MARTINEZ, JESUS
Applicants: FRUCOSOL COMERCIAL SL, COMERCIAL FRUCOSOL, S.L.
Application year: 1993
Main classification: A23N1
IPC codes: A23N1