LU82097A1 - METHOD AND APPARATUS FOR FILTERING LIQUID-CONTAMINATED IMPURITIES - Google Patents

Description

L-2477

--- Ο Λ Μ «6KAND-DUCHY OF LUXEMBOURG

Jw Lf ...... w A

du -? .. ™ - ^ jyllpt Minister, 1¾¾¾¾ of the National Economy and the Middle Classes

Book title: ........................................ 53? · W

LUXEMBOURG Industrial Property Service

Patent Application I. Application FRY-LINER ENTERPRISES, ...... 17 ..... Royal Road, ...... Council Bluffs, ...... IA ..... ...................... (1) 5Ï50Ï, E.Ü.A. / represented by Jean Waxweiler, 21-25 Allée 'Sche'jEÎer, Lüxé ^ ..... in '' "quâTité'dë '' '' m ^ ................................ .................

> drop off ........ this January twenty one thousand nine hundred and one hundred ..... eighty (3) at ........ hours, at the Ministry of National Economy and the Middle Classes, in Luxembourg: 4 1. this request for obtaining a patent for an invention concerning: .............. .................................................. .................................................. .................................................. .................................................. .........................-........................ ............... (4)

Process and apparatus for filtering out impurities contaminating a ..... vgg -.................................. .................................................. .................................................. .................................................. .................................................. ..............

declares, assuming responsibility for this declaration, that the inventor (s) is (are): ......................... .................................................. .................................................. .................................................. .................................................. .................................................. .... (5)

Hershel E. Ratliff ..... 3 ..... Bennett Avenue, Council ^ Blu IA, E.U.A.

. . .... .... . ... Council Bluffs, IA November 28, 1979 3. description in French language ................................... ........ of the invention in two copies; 4 ............. 2 ---------------- drawing boards, in two copies; 5. the receipt of the fees paid to the Luxembourg Registration Office, on January twenty-one thousand nine hundred and eighty claims for the above patent application the priority of one (or more) application (s) of ( 6) ............................ brSY.ê.t .------------- --------------------------- filed in (7) ___________________. E .-. UA__________________________________________________________________________________________ fifteen February nineteen hundred and seventy - new under no. m '"' 12 '" 523 .......................................... .................................................. .................................................. .................................................. .............................

on behalf of E. RaHif f ................................................ .................................................. .................................................. ................. (9) elect domicile for him / her and, if designated, for their proxy, in Luxembourg _________________________ .j.ean .... Waxweiler .. r..21.-25 ... Allée Schaff. er .., Luxerabo.ur.g ......................................... ......................... (io) requests the issuance of a patent for the subject described and represented in the appendices i- -, mentioned above, - with postponement of this issue to ....................................... ....month.

" The agent....................................

.........................................

II. Deposit Report »

The above application for a patent for invention has been filed with the Ministry of National Economy and the Middle Classes, Industrial Property Service in Luxembourg, dated: 21.01.1980

Pr. The Minister at 3 p.m. de7'S's \ 'of National Economy and the Middle Classes, tJî ί ^ A 68007 \ 1 VV-% "' fi CLAIM OF PRIORITY Filing of the patent application E.U.A.

of February 15, 1979 UNDER number 12 523

DESCRIPTIVE MEMORY FILED IN SUPPORT OF A PATENT INVENTION APPLICATION

*

IN THE GRAND DUCHY OF LUXEMBOURG

___ „FRY-LINER ENTERPRISES

by; , Method and apparatus for filtration of POM> ^ »impurities contaminating a liquid.

- 1 -

The present invention relates to a method and apparatus for filtering impurities contaminating a liquid.

In domestic and commercial processes, cooking in deep frying, large amounts of cooking oil or fat are consumed. During the cooking process, the oil or fat is contaminated with water, fatty acids, dust, carbon particles, food particles and other undesirable elements. Since the normal cooking temperatures used during the deep-frying process are 163 ° C or more, the presence of im-. · Purities contaminating the oil has the effect of causing fumes, blackening it or chemically breaking its constituents.

One of the ways that large commercial establishments have found to avoid this problem has been to periodically circulate the cooking oil through a complete filtration system which is expensive to install and maintain.

Domestic users and commercial establishments not using this circulating filtration system have no choice but to pour the contaminated fat or oil through a cloth or other woven material or to discard the contaminated oil or grease and replace it with fresh product. Disposing of cooking liquid is very expensive because of the price per volume of cooking oil and cooking fat and the quantities required. Passing the liquid through a filter is also a messy and somewhat risky job because of the temperature of the liquid, its weight and volume and the fact that the surfaces with which it comes into contact become slippery.

There are no easily installed and used filtration systems available to the general public and to commercial establishments, which systems effectively remove contaminating oil impurities or cooking grease to allow repeated use of the same volume of liquid during a extended period of time 40 and there is, moreover, no filtration systems which make it possible to cook the food within the limits of the elements of the filter itself.

It is an object of the present invention to provide an inexpensive, safe and easy to handle filtration system which will significantly reduce the amount of cooking oil or grease consumed during harmful and commercial frying cooking operations.

It is another object of the present invention to implement a cooking method in full-frying where the food is cooked within the limits of the filter itself.

. The filtration system according to the invention promotes the flow through the filter in a direction after insertion into the medium to be filtered, the flow through the filter in the opposite direction after removal of the medium and the flow in both directions during the cooking process. The filtration system according to the invention does not require a complex circulation system for filtering cooking oil and this system can be adapted to be used in conventional full-frying cooking vessels with little or no modifications required. The filtration system according to the invention is removably attached to the outside of a separate support or to the outside of a usual basket or net used for cooking in frying or other similar structure.

Other objects and advantages of the present invention will be readily apparent after reading the following detailed description.

So that the invention can be better understood, “reference is made to the following figures where:

FIG. 1 is a perspective / exploded view showing the nested elements which are used for the implementation of the invention.

/ Figure 2 is a top view of the filter and the suppôtt assembled; Figure 3 is a sectional view of the filter and the support taken along line 3-3 of Figure 2.

Figure 4 is a sectional view of the filter during use before removal of the container containing the liquid; and Figure 5 is a sectional view of a modified version of the preferred embodiment showing cooperation between the handle and the hook of the basket or net and the projecting part of the tank containing the liquid to suspend the filter in the drainage position.

In the figures, the same reference numerals designate identical or corresponding parts and FIG. 1 represents the cooking and filtration system 10 according to the invention. The elements which constitute this system are a container 20 containing the liquid, a filter 40, a support 60 and a basket or net 80.

The container 20 containing the fluid is preferably made of stainless steel and comprises an outwardly projecting part 21 surrounding the lower part 22 of the container.

The support 60 comprises a number of vertical 61 and horizontal 62 support elements which form an open mesh structure which conforms to the internal configuration of the lower part 22 of the container 20 containing the liquid. The vertical support members 61 are curved outward at their upper ends (as at 63) to form an edge 64 extending outwardly around the upper periphery of the support 60. The support 60 also includes a number 65 of pivoting handles, the purpose and function of which will be explained below.

. Removable attached to the periphery of the support, 60 is a filter 40 in the form of an open bag or envelope. The filter 40 is fixed to the external edge 64 of the support according to any suitable method, for example by means of clamps, springs, cords, rigid elements and other fixing means, etc.

The filter 40 of the preferred embodiment is mounted on the outside of the support and can be produced in the form of a nonwoven fabric bonded by means of a resin 40 composed of rayon fibers and binder which is produced. by Kendall under the industrial designation 143 - 038 and which complies with the rules of the Food and Drug Administration (USA) concerning the filtration of oils and greases J edible boiler; however any filter material t which has the same or similar properties to that of this Kendall filter which is in woven form or not would be suitable.

The filtration system operates as follows: 10 before cooking the food, the container 20 is filled with cooking oil or melted animal fat, the filter 40 is removably attached to the support 60 and the combined support + system the filter is lowered by means of the handles 65 into the container containing the liquid, which has the effect of forcing the liquid 90 in one of the two directions through the filter. The downward movement of the combined support + filter system in the container ends when the edge 64 extending outwardly around the upper periphery of the support 60 comes into contact with the projecting part 21 of the container. In this position the support suspends the filter so that it is near and adjacent to the internal walls of the container. The food or cured products are then introduced into the bag-shaped filter and the container is heated to heat the liquid and cook the product within the limits of the filter. Turbulence is created by the application of heat to the liquid, forces it in both directions through the filter and when the filter is removed from the container the liquid is forced in the other of the two directions through of the filter.

The advantages of this method and apparatus should now be apparent since the initial insertion of the filter into the container achieves a preliminary material filtration of all the liquid present * in substantial proportions in the volume of liquid in the container and when the food is disposed within the inner limits of the filter and heat is applied to effect cooking, the turbulence of the fluid is an inherent side effect which forces contaminated oil or contaminated fat to pass through repeated through the filter so that the oil which passes from inside the limits of the filter and the support is filtered once at the outlet and once at the inlet. Circulation filtration continues for the duration of individual cooking and during subsequent cooking cycles until the filter needs to be replaced, then removal of the filter and holder forces the liquid by gravity 10 into the other from the two directions through the filter, a material last time to trap all contaminated material which could remain suspended within the limits of the interior of the filter during its use.

As can be seen in FIG. 5, the pivoting handles 65 of the support are designed to cooperate with the protruding part 21 of the container to suspend the support and the filter above the part of the container in order to allow drainage of the residual liquid from inside the filter limits. When this has been accomplished, the filter is removed and discarded and a new filter is attached to the support and the process is repeated.

Placing the filter on the outside of the support facilitates the removal of the used filter by freeing the fixing means and allowing the residual fluid remaining on the support to settle towards the inside of the new filter when it is arranged for support.

In various proposed modifications of the preferred embodiment (only one of which is shown in Figure 5), the support is removed and in another version the filter is removably attached directly. ‘Outside the usual basket or net normally used to suspend food in heated oil during cooking. Alternatively, the filter 35 has rigid elements integral with this filter which allow it to stand on its own in the liquid container and according to yet another possibility the filter 40 is removably attached to the container 20 .

40 The common point with all these embodiments is that the food is cooked within the limits of the filter and the inherent turbulence of the liquid created by the application of heat continuously circulates the liquid through the filter 5 to trap contaminating material in it.

Of course, various modifications can be applied by a person skilled in the art to the devices and methods which have just been described only by way of nonlimiting examples without departing from the scope of the invention.

10k

Claims (11)

1. Method for filtering impurities contaminating a liquid to which heat has been applied to cook a product 5 which is immersed therein, characterized by the steps of: placing a volume of liquid in a container, introducing a bag-shaped filter into the container in such a way that it is supported, the open end of the bag protruding above the liquid level, introduce the product to be cooked inside the bag-shaped filter and apply heat to the container to heat the liquid in order to cook the product and create turbulence in the liquid in order to circulate the latter continuously through the filter in order to trap the suspended impurities. 2. Method according to claim 1, characterized in that it comprises (in addition the steps of removing the cooked product from the filter, raising the entire filter above the level of the liquid in order to allow the drainage of the liquid-20 and contaminating impurities inside the filter through it under the effect of gravity in the container and discard the filter itself. 3. Method according to any one of claims 1 and 2, characterized in that a volume of liquid is placed in a container, a bag-shaped filter is partially introduced at an open end into the container to force the liquid through the filter in one of two directions; heat is applied to the container to circulate the liquid in both directions through the filter, and the filter is removed from the container r to force the liquid through the filter in the other of the two directions. 4. Filtration device for implementing the method according to any one of claims 1 to 3, characterized in that it comprises a bag-shaped filter open at one end and a support for holding the end open. filter above the level of the liquid in the container. 5. Device according to claim 4, characterized 40 in that the products to be cooked are arranged inside the filter and heat is applied to the container to cook these products and circulate the liquid through the filter. 6. Device according to claim 5, characterized in that the filter is removably attached to this support. 7. Device according to claim 6, characterized in that the support suspends the filter in the container. 8. Device according to claim 5, characterized in that the support is an integral part with the filter. 9. Device according to claim 7, characterized in that the filter is removably attached to the outside of this support. 10. Device according to claim 9, characterized in that the support is arranged inside the bag-shaped filter. 11. Apparatus according to claim 9, characterized in that the support is formed by this container filled with liquid. 1