1. Field of the Invention
The present invention relates to cooking apparatus used for the cooking of foods that contain fat or grease, or where oil is added for frying or to pre-lubricate a cooking surface. More particularly, the invention concerns the separation and removal of fat, grease and other fatty liquids from a cooking apparatus in which food is being prepared.
2. Description of the Prior Art
The presence of oil or hot liquefied fat derivatives in a cooking apparatus during food preparation produces a myriad of potential dangers, environmental hazards, and otherwise unhealthy consequences. For example, allowing food to sit in a pool of hot grease while being cooked is likely to result in some of that fat being absorbed or reabsorbed by the food, which is then consumed. It is widely accepted that the eating of fatty foods that are saturated with liquefied fats and certain animal fats can adversely affect a person's health, contributing to coronary blockage and other unhealthful conditions. There is also inherent danger in allowing ultra hot grease to collect in an open pan or pot due to splattering, or worse, the possibility of the cooking apparatus being accidentally knocked over. Although it is conventional practice to pour out fatty liquids during or following cooking, the discarding such liquids in this manner presents a myriad of pitfalls. For example, pouring hot grease out of a pan or pot can be both messy and dangerous. If the grease is poured down a drain, it can solidify and clog the drain as it cools or travel through a city sewer network, carrying with it the hazards of dirty grease.
With the foregoing in mind, there has been a proliferation of inventions and products whose primary objective has been to produce a healthier and more practical alternative to cooking foods that may generate fatty byproducts. For example, there is the George Foreman® grill and equivalents that utilize gravity as a means of having animal fat runoffs (grease) roll down channels so that the grease, once separated from the food, is prevented from being reintroduced back into the food. Although such designs may succeed in separating some of the grease and prevent it from reentering the food being cooked, the grease ultimately remains in or near the hot cooking environment. In addition, because the design is totally dependant on gravity as the sole means of moving the grease, its effectiveness is limited to those situations where the cooking apparatus remains static and is positioned on a flat surface. This, for example, would preclude its use in a fry pan or equivalent where the user may in the normal course of cooking have to pick up the cooking apparatus and shake or angle it to unusual temporary attitudes. Given the unyielding physics of gravity, such movements would cause the grease to move out of position, thereby defeating the benefits of having the grease travel down to the low preordained point on the apparatus when it is in its preferred static orientation.
Other prior art proposals include the use of cooking grease traps that are injected into the center of the cooking environment. Although these traps may act to mitigate grease regurgitation under limited circumstances, they do not claim to eliminate or remove the existing grease from the cooking area. Under certain circumstances, such traps, once saturated, actually act to form a concentrated area of grease and fat and can sometimes act in opposition to their primary objective and expose the food being cooked to the concentrated fat and grease, which is then reabsorbed into the food.
It is to solving the foregoing problems that the present invention is directed. In particular, what is required is an improved cooking apparatus and cooking technique that allows a user to remove excess fat, grease, oil or other unwanted fatty liquids from the cooking environment during or immediately following cooking, thereby resulting in a healthier food product. Relatedly, it would be desirable to provide a way to isolate such liquids away from the open cooking utensil so that they are outside the influence of the cooking environment, thereby mitigating the inherent dangers associated with open and loose ultra hot fats, grease and oil. Finally, if the fatty liquids can be quarantined away from the cooking environment, they will have an opportunity to cool to a point where they solidify, thereby allowing the user to discard the fatty solids in a more environmentally benign and safe manner.
The foregoing problems are solved and an advance in the art is obtained by a cooking system for separating and storing fatty liquids away from edible food either during or after a cooking process. In one aspect, the cooking system includes a cooking apparatus having a body portion for cooking food. A fatty liquid reservoir mounted on the cooking apparatus is in fluid communication with the body portion. A pressure reducing device is in fluid communication with the reservoir and generates a pressure differential of sufficient magnitude to deliver a fatty liquid from the body portion to the reservoir. The system allows a user to cook food while removing excess liquid fat, grease or the like in order to scavenge away the unwanted fatty liquid from the cooking environment to a storage area where the liquid is safely quarantined. Once quarantined, the hot fatty liquid can be allowed to cool so that it can be eventually discarded in an environmentally beneficial manner.
In another aspect, the cooking system includes a cooking apparatus, a liquefied grease/oil reservoir, and a liquid removal conduit having one end in fluid communication with the cooking apparatus and another end in fluid communication with the liquefied grease/oil reservoir. A volume expander in fluid communication with the liquefied grease/oil reservoir is used to lower the ambient pressure in the reservoir. A device for activating the volume expander is also provided.
In a further aspect, a method is provided for separating a fatty liquid from edible food either during or after cooking. According to the method, food is placed in a body portion of a cooking apparatus having a fatty liquid reservoir in fluid communication with the body portion and with a pressure reducing device. The food is heated to generate a fatty liquid or a fatty liquid is introduced prior to cooking, and the pressure reducing device is activated to generate a pressure differential of sufficient magnitude to deliver the fatty liquid from the body portion to the reservoir.
In a still further aspect, a cooking system kit is provided for attachment to a cooking apparatus. The kit includes a liquefied grease/oil reservoir, a liquid removal conduit having one end adapted to be placed in fluid communication with the cooking apparatus and another end in fluid communication with the liquefied grease/oil reservoir. A volume expander in fluid communication with the liquefied grease/oil reservoir is used to lower the ambient pressure in the reservoir. A trigger device for activating the volume expander is also provided.
The foregoing and other features and advantages of the invention will be apparent from the following more particular description of various exemplary embodiments, as illustrated in the accompanying Drawings, in which:
According to exemplary embodiments to be described in more detail below, a cooking system is disclosed herein that allows a user to isolate, remove and separate fatty liquids and transport them away from a cooking apparatus in which food is being cooked. The fatty liquids may include liquefied fat, grease, oil, water and other constituents that are either generated as a byproduct of the cooking (e.g., grease expressed from ground beef) or which are added prior to cooking as an aid to the cooking process (e.g., oil for greasing the cooking apparatus or for fat-frying the food). Advantageously, the fatty liquids can be segregated and removed to a reservoir for collection and disposal either during or after cooking. The user can thus be confident that he or she can cook, emptying the reservoir as needed for disposal of the fatty liquids, and still be assured a fat free cooking environment. By removing the fatty liquids to the reservoir during cooking, the user is provided an additional level of safety in that there is no hot grease splatter and there is less likelihood of injury in the event that the cooking apparatus is accidentally tipped or knocked over. The fatty liquids can be isolated away from the cooking apparatus so that the liquids are outside the influence of the cooking environment, mitigating the inherent dangers associated with open and loose fatty liquid materials such as ultra hot grease. Finally, because the fatty liquids are quarantined away from the heated cooking environment, the liquids have an opportunity to cool to a point where they solidify, thereby allowing the user to discard the waste solids in a more environmentally benign and safe manner. As a consequence of the fatty liquids being stored separately from the primary cooking area, the user has the benefit of being able to allow the liquids to remain static as they cool and solidify to the point where the user can discard the fatty solids in a more environmentally friendly manner.
In the exemplary embodiments disclosed herein, fluid dynamics and the physics of differential pressure forces are used in an advantageous way. Although physicists may consider the notion of “suction” apocryphal, the net effect is what looks and acts like a suction. The disclosed embodiments effectively capitalize on the fact that when there is an environment with a higher ambient gas pressure and there is a closed environment which has a lower internal gas pressure, merging the two environments will result in the high pressure tending to flow to the area of low pressure in an effort to equalize the pressure. The same dynamic provides the motive force to sweep the fatty liquids out of the cooking area, where there is a relatively high ambient pressure, to the reservoir, where through operation of a pressure reducing device, the user creates a low pressure environment. The result is a motive force that continues until the pressure equalizes. This process can be repeated as many times as necessary until all the fatty liquids are removed from the cooking apparatus and moved into the reservoir. Advantageously, the removal of fatty liquids to the reservoir does not rely solely on gravity. The result is an active cooking system that allows a user to orient the cooking apparatus to different attitudes, as opposed to a passive system that relies solely on gravity to drain fatty liquids and must therefore remain substantially in one position in order to properly function.
In some of the disclosed embodiments, the low pressure environment is created by utilizing a volume expanding mechanism that expands the internal volume of an open vessel that provides a fatty liquid reservoir and a closed area that surrounds the reservoir and is in fluid communication therewith. The volume expanding mechanism can be provided by a multitude of devices such as a suction pump, a displacement pump, a syringe type of mechanism or a flexible bulb type of mechanism as is commonly found on basters. The physics are analogous to what a person does when they expand the internal volume in their lungs, allowing air to rush in and causing the person to breathe. In other disclosed embodiments, the reservoir is provided by a closed vessel that is connected to a pump (e.g., suction pump) or other pressure reducing device.
A liquid removal conduit provides fluid communication between the reservoir and an open body portion of the cooking apparatus that serves as a cooking area. The liquid removal conduit can be implemented in any desired fashion, including as a tube, a channel, a cavity or other hollow area. The liquid removal conduit may also be provided by a portion of the reservoir itself that extends into or is connected to the aforementioned body portion. Optionally, a mesh or other type of filter can be positioned in front of the opening that represents the ingress end of the liquid removal conduit to prevent clogging from pieces of small food, clumps of hardened grease, detritus or the like that might break off or form during the cooking phase. The liquid removal conduit connects the higher ambient gas pressure environment within the open cooking apparatus with that of the lower internal gas pressure that is generated inside the reservoir by the pressure reducing device. When fatty liquids are not present in the cooking apparatus, the ambient outside gas pressure and the internal gas pressure (within the reservoir) will tend to be the same because the liquid removal conduit will act as an open vent insuring equal pressure throughout. However, whether by design (e.g., locating the liquid removal conduit ingress end at a low point in the cooking apparatus) or by user manipulation of the cooking apparatus, the liquid removal conduit opening can be submerged in the fatty liquids as they accumulate in the cooking apparatus, thereby preventing a wholesale equalization of pressure by creating a controlled pressure system that comprises the liquid removal conduit, the reservoir, and the pressure reducing device. In that case, fluid dynamics and differential pressure physics would have the higher ambient gas pressure forcing its way through the liquid removal conduit to the lower pressure region of the reservoir. Because fluid dynamics teaches that the fatty liquids will substantially act as a gas under these circumstances, the liquid material will flow as if it were a gas through the liquid removal conduit in an effort to equalize the differential pressure. This movement is leveraged by utilizing the liquid removal conduit to direct the fatty liquids so that they travel in a predictable path and eventually drop into the reservoir, which acts as a trap, where the liquids remain segregated from the cooking apparatus until the user decides to empty the collected contents.
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The components 120, 122 and 124 may have any desired design or configuration and they may be either separately implemented as discrete components or combined in any fashion as a composite structure. As an example of the latter configuration, the reservoir 122 could be configured so that a portion thereof serves as the liquid removal conduit 124, and could be further configured to integrally incorporate the pressure reducing device 120. This composite structure could then be detachably or permanently mounted to the cooking apparatus 112. If the components 120, 122 and 124 are implemented as discrete elements, or as sub-combinations thereof, each element or sub-combination can be separately mounted to the cooking apparatus 112 (permanently or as detachable elements) or they could be disposed separately therefrom.
Accordingly, a cooking apparatus and method for separating and storing fatty liquids have been disclosed. While exemplary embodiments have been shown and described, it should be apparent that many variations and alternative embodiments could be implemented in accordance with the teachings herein. For example, although the disclosed embodiments illustrate cooking systems that can be implemented as one integrated unit, the invention also contemplates cooking systems where not only the reservoir, but also the pressure reducing device, the trigger, and the liquid removal conduit are separable in whole or in part from the cooking apparatus for both ease of cleaning and for efficiency in that such components could be attached to other cooking systems. In addition, these components can be integrated directly into and retrofitted as part of an existing cooking apparatus, for example, with the liquid removal conduit (which could be part of the reservoir) being positioned over the side of the cooking apparatus and extending into the cooking zone and with the reservoir and the pressure reducing device being clipped or otherwise attached to a handle or other location on the cooking apparatus, either separately or as an integrated reservoir-pressure reducing kit. It is understood, therefore, that the invention is not to be in any way limited except in accordance with the spirit of the appended claims and their equivalents.
The present application claims the benefit of U.S. Provisional Application Ser. No. 60/814,643, filed on Jun. 15, 2006 and entitled “Cooking Apparatus and Method for Separating and Storing Fatty Liquids.”
Number | Date | Country | |
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60814643 | Jun 2006 | US |