Abstract:
A device for the clean removal of an animal part from an animal carcass is set forth. The device includes a puller that attaches to the animal part and to a cable. A piston is also provided. The piston is connected to the cable that pulls the part away from the animal carcass via the cable and the puller, and applies pressure to dislocate the bones from the animal carcass. The bones are dislocated without removing the dislocated section completely from the animal carcass.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
   None. 
   BACKGROUND 
   The tradition of slaughtering animal meat goes back thousands of years. Many cultures developed special customs surrounding the butchering and storing of precious meat for the winter days. The customs extended into the serving of special holiday meats, such as the Christmas ham, set aside at the yearly slaughter festival. 
   In modern times, meat processing plants provide a year round source for fresh meat while eliminating the hunting, cleaning, and storing work involved in bringing the meat to the table for consumers. 
   Inherent in the mass processing of animal meats are problems related to quality. For example, speeding up a production line can present problems when automated tools are not adjusted to meet the dimensional requirements of individual carcasses. Having an individual manually handle each butchering step is costly and inefficient. 
   For example, manual removal of animal heads requires separating the head from the atlas joint, and is performed by a butcher. The operation of manually separating the head from the atlas joint is difficult and physically taxing due to the amount of force required to separate the head from the neck. 
   In an effort to speed up production various systems have been developed for automatically removing the head from the hog using a downward force. Examples can be seen in U.S. Pat. Nos. 3,990,126; 4,158,903; and 4,092,762 to Ochylski. Alternatively, a hog head can be removed using a vertical force as discussed, for example, in U.S. Pat. No. 2,994,908 to Fill. These automated methods completely remove the animal head from the carcass. Such methods, however, leave bone chips, presenting a quality control problem. 
   U.S. Pat. No. 5,139,457 to Rankin et al. provides an apparatus wherein the head of a carcass is pulled to spread the atlas joint before cutting. Proof of the neck stretching is provided by a reaction sensor. U.S. Pat. No. 6,776,701 discusses an apparatus for removing a partially severed head from a hog using a pivot saw assembly. 
   However, all of the known automated systems fail to maximize the meat available using a quality cutting without bone chips while minimizing the cost of the head removal step in the butchering process. 
   SUMMARY 
   In accordance with the principles of the present invention a device for the clean removal of an animal part from an animal carcass is provided. The device includes a puller that attaches to the animal part and to a cable. A piston is also provided. The piston is connected to the cable that pulls the part away from the animal carcass via the cable and the puller, and applies pressure to dislocate the bones from the animal carcass. The bones are dislocated without removing the dislocated section completely from the animal carcass. 
   A method of removing a head from a hog carcass is also provided. The method includes the following steps: hooking a puller into the head of the hog, actuating a piston connected to the puller via a cable threaded around at least one pulley, thereby dislocating the head of the hog from a spine of the hog, and removing the puller from the head of the hog. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar elements and in which: 
       FIG. 1  illustrates a side elevantional view, partially broken away, of an embodiment of a device constructed in accordance with the principles of the present invention. 
       FIG. 2  illustrates a front elevational view, partially broken away of the embodiment of  FIG. 1 . 
       FIG. 3  illustrates a detailed view taken along lines III-III of  FIG. 1 . 
   

   DETAILED DESCRIPTION 
   In the following description, specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent that the invention may be practiced without these specific details. Without departing from the generality of the invention disclosed herein and without limiting the scope of the invention, the discussion that follows will refer to the invention as depicted in the drawings. 
   An embodiment in accordance with the principles of the present invention is shown in  FIG. 1 . One embodiment of a device constructed in accordance with the principles of the present invention is illustrated generally at  10 . The device  10  includes a suitable puller, such as hook  12 . Any suitable puller can be employed to dislocate an animal part, such as a ring, loop, or any other suitable pulling element. Further, the puller can be formed of any suitable material for food contact, such as an easily cleanable, durable material that can withstand the force applied by the device  10  on the puller. 
   The puller, such as hook  12  illustrated in  FIG. 1  is securely connected to a cable  14 . The cable  14  is connected to piston  16  via a series of pulleys  18 ,  20 , and  22 . The cable  14  can be formed using a suitable material, such as braided metal cable. Further, the cable  14  can include separate sections joined together to improve the strength of the overall cable, such as a chain link section connected to a braided medal cable. 
   The piston  16  is connected to the hook  12  at the end of cable  14  via a series of pulleys  18 ,  20 , and  22 . A suitable piston  16 , such as a hydraulic or pneumatic piston can be provided. An expansion tank  24  for the piston can be provided. The expansion tank  24  functions in a hydraulic or pneumatic system in a conventional manner. A hydraulic or pneumatic valve  26  is also provided, and is operatively connected to the piston  16 . The valve  26  includes a lever actuator  28 . When an animal carcass to be processed is forwarded via overhead rail, the device  10  can be positioned such that each carcass of the rail comes into contact with and actuates the lever actuator  28 . 
   Pulleys  20 ,  22  are disposed above the piston  16  within a suitable frame  30 . The frame is also formed of a suitable food contact material, such as stainless steel, to ensure appropriate safety regarding cleaning the frame to remove processing fluids from the area. A suitable bracket  32  is connected to the frame at a height suitable for achieving appropriate pressure for dislocating the animal part given the angle determined by the pulley  18  and the frame  30 . Where the animal being processed is a hog, a suitable angle can include, for example, an acute angle between the cable  14  outside the frame  30  and the frame  30  exterior. 
   As illustrated in  FIG. 2 , the pulley  20  is connected to a piston rod  16   a  of the piston  16 . The hook  14  can be connected, for example, to a head of a hog  34 , as illustrated in  FIG. 3 . Actuation of the lever  28  exerts a force on the cable  14  to pull hog head  34  down. This action separates the neck vertebrae of the hog without severing the head from the body. The neck can then be manually cut between the vertebrae, which minimizes the likelihood of creating bone chips. 
   The device  10  can also be used, for example, to remove other extremities, such as legs, by separating the joints as well. 
   While this invention has been described in connection with the best mode presently contemplated by the inventor for carrying out his invention, the preferred embodiments described and shown are for purposes of illustration only, and are not to be construed as constituting any limitations of the invention. Modifications will be obvious to those skilled in the art, and all modifications that do not depart from the spirit of the invention are intended to be included within the scope of the appended claims. Those skilled in the art will appreciate that the conception upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention. 
   The invention resides not in any one of these features per se, but rather in the particular combinations of some or all of them herein disclosed and claimed and it is distinguished from the prior art in these particular combinations of some or all of its structures for the functions specified. 
   With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, including variations in size, materials, shape, form, function and manner of operation, assembly and use, and all equivalent relationships to those illustrated in the drawings and described in the specification, that would be deemed readily apparent and obvious to one skilled in the art, are intended to be encompassed by the present invention. 
   Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.