Patent Publication Number: US-2007101577-A1

Title: Fruit coring device for producing a closed bore

Description:
FIELD OF THE INVENTION  
      The invention relates to a device for removing the core of a fruit, particularly though not exclusively, an apple, to leave a closed ended bore (blind hole) to facilitate retention of a filling during baking to produce a baked fruit, e.g. an apple.  
     BACKGROUND OF THE INVENTION  
      Typical coring devices for apples are designed to remove the apple core by removing a plug, including the core, from a bore which extends completely through the apple. An example of such a device is illustrated in  FIG. 1 . This prior art device comprises a part circular elongate blade  1  having serrated edges  2  extending for much of the length of the blade from a handle  3  to a pointed blade end  4 . The pointed end  4  is inserted, usually from the stalk end of the apple, and the device is then rotated about a longitudinal axis defined by the blade while the blade  1  is pushed into the apple so that the teeth of the serrated edges  2  cut or tear the apple about its core until the blade  1  projects from the end of the apple opposite the stalk. The device is then removed, often leaving the core plug containing the core in place for separate removal, thereby adding a separate step in the removal of the core and leaving a bore open at both ends which hinders or prevents the retention of a filling during a baking operation.  
      In another prior art arrangement a circular tube, having a serrated circular edge extends away from a handle to which it is connected by a part circular member. This prior art device has similar drawbacks to those described with reference to  FIG. 1 .  
     OBJECT OF THE INVENTION  
      It is an object of the present invention to provide an improved coring device suitable for use in easily removing the core of an apple in one step while providing a closed ended bore to provide for retention of a filling in the bore during baking to produce a baked apple.  
      It is also an object of the present invention to provide such a coring device for apples which is economical and easy to manufacture while having a long life expectancy and great durability and reliability.  
     SUMMARY OF THE INVENTION  
      The present invention provides a fruit coring device comprising a handle and a tubular member having first and second ends and defining a longitudinal axis, the tubular member having an interior region, the first end of the tubular member being fast with the handle and the second end defining a member cutting edge and at least one blade having a blade cutting edge, the blade(s) being support within the interior region of the tubular member such that the blade cutting edge lies substantially in a plane defined by the member cutting edge.  
      The member cutting edge may be defined by at least one taper formed in the member, preferably converging tapers formed in the member with each taper having an angle of about 15° with respect to the axis.  
      It is to be understood that the term “cylindrical”, as used hereinafter and in the appended claims, means any shape that is circular or substantially circular such as, for example, octagonal, hexagonal, a square with rounded corners, other polygonal shapes, a ring, or a tubular ring, etc., regardless of whether or not the tubular member includes an air bleed passage. Generally speaking, the substantially cylindrical cutting member or cylindrical tubular member may comprise a plurality of planar surfaces interconnected with one another into a generally circular or oval configuration to form a leading cutting edge for cutting a bore in fruit. It is to be appreciated that the term “cylindrical” is also intended to cover arrangements in which the cutting edge is only partially cylindrical, e.g., the cutting edge only extends 180 degrees or greater. If desired, the member cutting edge may be serrated to facilitate cutting a bore within the fruit.  
      The handle preferably has two opposed extensions extending away from the longitudinal axis.  
      The blade may be a single blade, a pair of opposed blades or a first pair of blades and a second pair of blades with the first and second pair of blades extending perpendicular to one another.  
      The cutting member or tubular member may have a substantially continuous side wall extending from the first to the second end or merely may have a substantially continuous leading second end which is connected to the handle by two or more legs or some other rigid support to securely attach or affix the tubular member to the handle and prevent movement of the handle relative to the tubular member.  
      A sidewall of the cutting member or tubular member may be provided with an air passageway to allow air to bleed into the apple or fruit as the core is removed therefrom. This facilitates easier removal of the core as it substantially lessens the vacuum created within the apple or fruit during core removal. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
      The invention will now be described, by way of example, with reference to the accompanying drawings, in which:  
       FIG. 1  illustrates a prior art apple corer;  
       FIG. 2  is a perspective view of the apple coring device of the present invention;  
       FIG. 3  is a fragmentary cross-section taken on line  3 - 3  of  FIG. 2 ;  
       FIG. 4  is a cross-section taken on line  4 - 4  of  FIG. 2 ;  
       FIG. 5  is a fragmentary view of the handle portion of  FIG. 2  with an optional ring to limit penetration of the device into an apple being cored;  
       FIG. 6  is a fragmentary view of an alternative cutting edge to that of  FIG. 1 ;  
       FIG. 7  is a diagrammatic perspective view of an alternative embodiment of the device of the present invention;  
       FIG. 7A  is a simplified diagrammatic plan view of  FIG. 7  only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 8  is a diagrammatic perspective view of another embodiment of the device of the present invention;  
       FIG. 8A  is a simplified diagrammatic plan view of  FIG. 8  only showing the tubular member and the cutting blades for reasons of clarity;  
       FIG. 8B  is a simplified diagrammatic plan view of an alternative embodiment of  FIGS. 8 and 8 A only showing the tubular member and the cutting blade(s) for reasons of clarity;  
       FIG. 9  is a diagrammatic perspective view of yet another embodiment of the device of the present invention;  
       FIG. 9A  is a diagrammatic cross sectional view taken along line  9 - 9  of  FIG. 9 ;  
       FIG. 10  is a simplified diagrammatic plan view of a further embodiment of the present invention only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 11  is a simplified diagrammatic plan view of a still further embodiment of the present invention only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 12  is a diagrammatic perspective view of a still further embodiment of the device of the present invention;  
       FIG. 12A  is a simplified diagrammatic plan view of  FIG. 12  only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 12B  is a simplified diagrammatic plan view of an alternative embodiment of  FIGS. 12 and 12 A only showing the tubular member and the cutting blades for reasons of clarity;  
       FIG. 12C  is a simplified diagrammatic plan view of yet another embodiment of  FIGS. 12 and 12 A only showing the tubular member and the cutting blades for reasons of clarity  
       FIG. 13  is a diagrammatic partial cross sectional view of an embodiment of the tubular member with a thin wire cutting blade;  
       FIG. 14  is a diagrammatic partial cross sectional view of another embodiment of the tubular member and cutting blade(s);  
       FIG. 15  is a diagrammatic partial cross sectional view of yet another embodiment of the tubular member and cutting blade(s);  
       FIG. 16  is a diagrammatic perspective view of another embodiment of the device of the present invention;  
       FIG. 16A  is a simplified diagrammatic plan view of a yet a further embodiment of the present invention only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 17  is a simplified diagrammatic plan view of another embodiment of the present invention only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 18  is a simplified diagrammatic plan view of yet another embodiment of the present invention only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 19  is a simplified diagrammatic plan view of a still further embodiment of the present invention only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 20  is a simplified diagrammatic plan view of another embodiment of the present invention only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 21  is a diagrammatic perspective view of yet another embodiment of the device of the present invention;  
       FIG. 21A  is a simplified diagrammatic plan view of  FIG. 21  only showing the tubular member and the cutting blade for reasons of clarity;  
       FIG. 21B  is a simplified diagrammatic plan view of the tubular member stamped from a piece of sheet metal;  
       FIG. 22A  is a diagrammatic front elevational view of still another embodiment of the device of the present invention;  
       FIG. 22B  is a diagrammatic top plan view of  FIG. 22A ; and  
       FIG. 22C  is a diagrammatic partial perspective view of  FIG. 22A . 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS  
      Referring first to  FIG. 2 , an apple coring device  5  comprises a right circular substantially cylindrical cutting member or tubular member  6  extending from first end  7 , attached a handle  8 , to an opposite second end  9  which forms a leading cutting member edge or member cutting edge  10  traversed by a straight blade  11  attached within the tubular member  6 .  
      The handle  8  may be integral with the first end  7  or made fast with the first end  7  by the use of a conventional attachment mechanism, e.g., a press fit, an adhesive, rivets, welding, etc., and defines a pair of opposed projections  12 , each having a finger engaging opener  13 .  
      The length of the tubular member  6  from the cutting edge  10  to the proximate surface of the handle  8  is about 1.7 inches and the inside diameter of the tubular member  6  is about 1.0 inches.  
      As best seen in  FIGS. 2 and 3 , the cutting edge  10  of the tubular member  6  is formed by inner and outer tapered surfaces  14 , respectively, on the inside and outside of the tubular member  6 , each having a taper angle of about 15° relative to the longitudinal axis  15  of the tubular member  6  to reduce the wall thickness of the tubular member from about 0.030 inches to the cutting edge which has a width  16  of about 0.005 inches or so.  
      Extending diametrically across the cutting edge  10 , defining an end of the tubular member  6 , is a straight flat blade  11  having a cutting edge  17 , which is positioned closely adjacent to and lying in a plane defined by the cutting edge  10  of the tubular member  6 . The blade  11  may be firmly supported in slots  18  (one only being shown) located at the sidewall of the tubular member  6  or by other means that will be well known to those skilled in the art. The blade  11  extends from its straight cutting edge  17  along the axis toward the handle  8 . The straight cutting edge has a thickness  19  ( FIG. 4 ) of about 0.015 inches and the blade  11  has a width  20  extending along the axis  15  of about 0.5 inches.  
      In order to function to produce a closed ended bore in a small apple or some other fruit, one or more rings  21  may be provided ( FIG. 5 ) to fit over the tubular member  6  against the handle  8  to reduce the depth of the bore that can be produced by the device  5 .  
      In an alternative embodiment ( FIG. 6 ) the cutting edge  10  of the tubular member may be serrated  22  to aid in the initial penetration of the apple&#39;s skin.  
      To operate the device  5 , an operator will center the cutting edge  10  of the tubular member  6  over the desired apple or other fruit to be cored, usually from the stalk end of the apple or other fruit, and push the device  5 , without twisting, into the apple or other fruit until the handle  8  contacts or abuts with the apple or other fruit. Following initial penetration within the apple or fruit, the device  5  may be realigned with respect to the apple or fruit to ensure proper and accurate alignment of the device  5  with the core to facilitate removal of the fruit core. The handle  8  is then used to turn or twist the device  5 , including the blade  11 , relative to the apple or other fruit to be cored about the longitudinal axis  15  at least ¼ of a turn or so until the blade(s) sufficiently shears or separates the core from a remainder of the apple or other fruit. After this occurs, the operator then removes or pulls the device  5  out of the apple or other fruit with the tubular member  6  removing with it the fruit core plug which is retained within the interior region  34  of the device  5 . With the core removed, this leaves a closed ended or bottomed bore in the apple or fruit which is able to accept, in leak proof manner, a filling used in the production of a baked apple, for example. Upon further use of the device  5  to remove a new core, upon repeating the above procedure, the new core will push the previously removed fruit core out through the opening  50  (see  FIGS. 5 and 9 , for example) formed in the handle  8  of the device  5  so that the new core will be thus be retained within the interior region  34  of the device  5 . In the event that an opening  50  is not formed in the handle  8  of the device  5 , the core will have to be removed from the interior region  34  of the device  5 , via the second end  9  of the tubular member  6 , by hand prior to removing a new core.  
      With reference now to  FIGS. 7 and 7 A, another embodiment of the apple coring device  5 , according to the present invention, will now be described. As this embodiment is very similar to the preceding embodiments, only the differences between this embodiment and the preceding embodiments will be discussed in detail.  
      According to this embodiment, the blade  11  comprises diametrically opposed first and second blades  11 ′,  11 ″ which are both accommodated within the interior region  34  of the tubular member  6 . Both of the first and second blades  11 ′,  11 ″ lie in and define a first plane P 1  which is coincident with the longitudinal axis  15  of the device  5 . Both of the first and second blades  11 ′,  11 ″ are securely and permanently affixed to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. The substantially radially inwardly facing edges  32  of the first and second blades  11 ′,  11 ″ are spaced from one another by a distance of between about 0.25 and 0.75 inches or so with the longitudinal axis  15  of the device  5  being equally spaced from each longitudinal edge.  
      The length of the tubular member  6  from the cutting edge  10  to the surface proximate the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. Each of the first and second blades  11 ′,  11 ″ has a thickness of about 0.015 inches, an axial length of between about 0.05 inches to 2.5 inches or so, preferably about 1.7 inches and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the previously discussed embodiments.  
      With reference now to  FIGS. 8 and 8 A, a further other embodiment of the apple coring device  5  according to the present invention will now be described. As this embodiment is very similar to the embodiment of  FIG. 2 , only the differences between this embodiment and the embodiments of  FIG. 2  will be discussed in detail.  
      As with the embodiment of  FIG. 2 , only a single straight blade  11  is utilized which defines and lies a first plane P 1 . The first plane P 1  lies parallel to but is spaced from or offset from and not coincident with the longitudinal axis  15  of the device  5 . Both opposed ends  36  of the single blade  11  are securely and permanently affixed to the inner surface  30  of tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. According to this embodiment, the tubular member  6  has a substantially continuous leading second end  9  which is connected to the handle  8  by at least one, preferably two or more legs or other rigid supports  33  to securely attach or affix the tubular member  6  to the handle  8  and prevent any axial and/or rotational movement of the tubular member  6  relative to the handle  8 . That is, a portion of the sidewall, adjacent the first end  7  of the tubular member is removed and this removed sidewall provides access to the interior region  34  to assist with removed of the core, if desired, without significantly effecting the integrity of the tubular member  6 .  
      The length of the tubular member  6  from the cutting edge  10  to the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. The single blade  11  has a thickness of about 0.015 inches, an axial length of between about 0.05 inches to 2.5 inches or so, preferably about 1.7 inches and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the embodiment of  FIG. 2 .  
      With reference now to  FIG. 8B , a slight variation of the embodiment of the apple coring device  5  according to  FIGS. 8 and 8 A will now be described. As this embodiment is very similar to the embodiment of  FIGS. 8 and 8 A, only the differences between this embodiment and the embodiment of  FIGS. 8 and 8 A will be discussed in detail.  
      According to this embodiment, the straight blade  11  comprises first and second blades  11 ′,  11 ″ which are both supported adjacent the second end of the tubular member  6 . Both of the first and second blades  11 ′,  11 ″ lie in and define a first plane P 1  which extends parallel to but is spaced and offset from and not coincident with the longitudinal axis  15  of the device  5 . A longitudinal edge of each of the first and second blades  11 ′,  11 ″ is securely and permanently affixed to the inner surface  30  of tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. The radially inwardly facing edges  32  of the first and second blades  11 ′,  11 ″ are spaced from one another by a distance of between 0.25 and 2.50 inches.  
      The length of the tubular member  6  from the cutting edge  10  to the proximate surface of the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. Each of the first and second blades  11 ′,  11 ″ has a thickness of about 0.015 inches, an axial length of between about 0.05 inches to 2.5 inches or so, preferably about 1.7 inches and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the previously discussed embodiments.  
      With reference now to  FIGS. 9 and 9 A, yet another embodiment of the apple coring device  5  according to the present invention will now be described. As this embodiment is very similar to the embodiment of  FIGS. 7 and 7 A, only the differences between this embodiment and the embodiment of  FIGS. 7 and 7 A will be discussed in detail.  
      According to this embodiment, the blade  11  comprises diametrically opposed first and second blades  11 ′,  11 ″ which are both accommodated within the interior region  34  of the tubular member  6 . The first blade  11 ′ lies in and defines a first plane P 1  which forms an angle α of between 5 and 45 degrees with the longitudinal axis  15 , preferably forms an angle of about 20 degrees. The first plane P 1  intersects with the longitudinal axis  15  of the device  5 . The second blade  11 ″ lies in and defines a second plane P 2  which forms an angle of between 5 and 45 degrees with the longitudinal axis  15 , preferably forms an angle of about 20 degrees. The second plane P 2  intersects with the longitudinal axis  15  of the device  5  and also intersects with first plane P 1 . Both of the first and second blades  11 ′,  11 ″ are securely and permanently affixed to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. The radially inwardly facing edges of the first and second blades  11 ′,  11 ″ are spaced from one another by a distance of about 0.25 and 0.75 inches or so.  
      The length of the tubular member  6  from the cutting edge  10  to the proximate surface of the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. Each of the first and second blades  11 ′,  11 ″ has a thickness of about 0.015 inches, an axial length of between about 0.05 inches to 2.5 inches or so, preferably about 1.7 inches and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the previously discussed embodiments.  
      With reference now to  FIG. 10 , a slight variation of the embodiment of the apple coring device  5  according to  FIGS. 2-5  will now be described. As this embodiment is very similar to the embodiment of  FIGS. 2-5 , only the differences between this embodiment and the embodiment of  FIGS. 2-5  will be discussed in detail.  
      As with the embodiment of  FIGS. 2-5 , only a single straight blade  11  is utilized which defines and lies a first plane P 1 . The first plane P 1  lies parallel to and is coincident with the longitudinal axis  15  of the device  5 . Both opposed ends  36  of the single blade  11  are securely and permanently affixed and to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. An elongate recess, slot, trough or groove  38 , for example, is formed longitudinally along the sidewall  40  of the tubular member  6  from the first end  7  to the second end  9  thereof. The elongate recess, slot, trough or groove  38  forms a bleed air passageway along the tubular member  6  to allow air to be supplied toward a base of the closed bottomed bore formed in the apple or the other fruit as the core is being removed therefrom. It is to be appreciated that as the core is being removed or extracted from the apple or other fruit, a significant amount of vacuum is generated within the apple or other fruit. The elongate recess, slot, trough or groove  38  provides a passageway which allows room air to be sucked into the apple or other fruit as the device  5  is removed, along with the core, from the apple or other fruit. The elongate recess, slot, trough or groove feature  38  facilitates easier removal of the core as it substantially lessens the vacuum created within the apple or fruit during core removal. It is to be appreciated that although the device  5  is describe as having a single blade  11 , as one skill in the art would appreciate, any one of the other disclosed blade arrangements may be utilized in combination with the elongate recess, slot, trough or groove feature  38 .  
      With reference now to  FIG. 11 , another slight variation of the embodiment of the apple coring device  5  according to  FIGS. 2-5  will now be described. As this embodiment is very similar to the embodiment of  FIGS. 2-5 , only the differences between this embodiment and the embodiment of  FIGS. 2-5  will be discussed in detail.  
      As with the embodiment of  FIGS. 2-5 , only a single straight blade  11  is utilized which defines and lies a first plane P 1 . The first plane P 1  lies parallel to and is coincident with the longitudinal axis  15  of the device  5 . Both opposed ends  36  of the single blade  11  are securely and permanently affixed and to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. An elongate cutout or gap  44 , for example, is formed longitudinally along the sidewall  40  of the tubular member  6  from the first end to the second end  9  thereof. The elongate cutout or gap  44  forms an air passageway along the tubular member  6  which allows air to be supplied toward a base of the closed bottomed bore formed in the apple or the other fruit by the device  5  as the core is being removed therefrom. This elongate cutout or gap  44  significantly lessen the amount of vacuum generated within the apple or other fruit as the core is being removed or extracted from the apple or other fruit. The elongate cutout or gap  44  provides a passageway which allows room air to be sucked into the apple or other fruit as the device  5  is removed, along with the core, from the apple or other fruit. The elongate cutout or gap  44  feature facilitates easier removal of the core. It is to be appreciated that although the device  5  is describe as having a single blade  11 , as one skill in the art would appreciate, any one of the other disclosed blade arrangements may be utilized in combination with the elongate cutout or gap feature  44  (see  FIG. 12B  discussed below, for example).  
      With reference now to  FIGS. 12 and 12 A, a still further embodiment of the apple coring device  5  according to the present invention will now be described. As this embodiment is very similar to the embodiment of  FIGS. 7 and 7 A, only the differences between this embodiment and the embodiment of  FIGS. 7 and 7 A will be discussed in detail.  
      According to this embodiment, the blade  11  comprises a first pair of diametrically opposed first and second blades  11 ′,  11 ′″ and a second pair of diametrically opposed first and second blades  11 ″,  11 ″″ which are all accommodated within the interior region  34  of the tubular member  6 . The first pair of first and second blades  11 ′,  11 ′″ lie in and define a first plane P 1  which is coincident with the longitudinal axis  15  of the device  5  and the second pair of first and second blades  11 ″,  11 ″″ lie in and define a second plane P 2  which is also coincident with the longitudinal axis  15  of the device  5 . The first plane P 1  extends substantially normal to the second plane P 2 . Both pair of the first and second blades  11 ′,  11 ″ are securely and permanently affixed to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. The radially inwardly facing edges  32  of the first pair of first and second blades  11 ″″ are spaced from one another by a distance of between 0.10 and 0.5 inches, preferably about 0.25 inches or so with the longitudinal axis  15  of the device  5  being equally spaced from each longitudinal edge while the radially inwardly facing edges  32  of the second pair of first and second blades  11 ″,  11 ″″ are also spaced from one another by a distance of between 0.10 and 0.5 inches, preferably about 0.25 inches or so with the longitudinal axis  15  of the device  5  being equally spaced from each longitudinal edge.  
      The length of the tubular member  6  from the cutting edge  10  to the proximate surface of the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. Each of the first and second blades has a thickness of about 0.015 inches, an axial length of between about 0.05 inches to 2.5 inches or so, preferably about 1.7 inches and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the previously discussed embodiments.  
      With reference now to  FIG. 12B , is essentially a combination of the embodiments of the apple coring device  5  according to  FIGS. 11 and 12  and  12 A. As this embodiment is very similar to those embodiments, only the differences between this embodiment and those embodiment will be discussed in detail.  
      According to this embodiment, the blade  11  comprises a first pair of diametrically opposed first and second blades  11 ′,  11 ′″ and a second pair of diametrically opposed first and second blades  11 ″,  11 ″″ which are all accommodated within the interior region  34  of the tubular member  6 . The first pair of first and second blades  11 ′,  11 ′″ lie in and define a first plane P 1  which is coincident with the longitudinal axis  15  of the device  5  and the second pair of first and second blades lie in and  11 ″,  11 ″″ define a second plane P 2  which is also coincident with the longitudinal axis  15  of the device  5 . The first plane P 1  extends substantially normal to the second plane P 2 . Both pair of the first and second blades  11 ′,  11 ″,  11 ′″,  11 ″″ are securely and permanently affixed to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. The radially inwardly facing edges  32  of the first pair of first and second blades  11 ′″ are spaced from one another by a distance of between 0.10 and 0.5 inches, preferably about 0.25 inches or so with the longitudinal axis  15  of the device  5  being equally spaced from each longitudinal edge while the radially inwardly facing edges  32  of the second pair of first and second blades  11 ″″ are also spaced from one another by a distance of between 0.10 and 0.5 inches, preferably about 0.25 inches or so with the longitudinal axis  15  of the device  5  being equally spaced from each longitudinal edge.  
      An elongate cutout or gap  44  is formed longitudinally along the sidewall  40  of the tubular member  6  from the first end  7  to the second end  9  thereof. The elongate cutout or gap  44  forms an air passageway along the tubular member  6  to allow air to be supplied toward a base of the closed bottomed bore formed in the apple or the other fruit by the device  5  as the core is being removed therefrom. It is to be appreciated that as the core is removed or extracted from the apple or other fruit, a significant amount of vacuum is generated within the apple or other fruit. The elongate cutout or gap  44  provides a passageway which allow room air to be sucked into the apple or other fruit as the device  5  is removed, along with the core, from the apple or other fruit.  
      With reference now to  FIG. 12C , yet another embodiment of the apple coring device  5  according to the present invention will now be described. As this embodiment is very similar to the embodiment of  FIGS. 12 and 12 A, only the differences between this embodiment and the embodiment of  FIGS. 12 and 12 A will be discussed in detail.  
      According to this embodiment, the blade  11  comprises a first pair of first and second blades  11 ′,  11 ′″ and a second pair of first and second blades  11 ″,  11 ″″ which are all accommodated within the interior region  34  of the tubular member  6 . The first blade  11 ′ of the first pair of blades  11 ′,  11 ′″ lies in and defines a first plane P 1  which extends parallel to but is spaced or offset from and not coincident with the longitudinal axis  15  of the device  5  while the second blade  11 ′″ of the first pair of blades lies  11 ′,  11 ′″ in and defines a third plane P 3  which extends parallel to but is also spaced or offset from and not coincident with the longitudinal axis  15  of the device  5 . The first plane P 1  extends parallel to but is spaced from the third plane P 3  by a distance of between about 0.075 and 0.33 inches or so.  
      The first blade  11 ″ of the second pair of blades  11 ″,  11 ″″ lies in and defines a second plane P 2  which extends parallel to but is spaced or offset from and not coincident with the longitudinal axis  15  of the device  5  while the second blade  11 ″″ of the second pair of blades  11 ″,  11 ″″ lies in and defines a fourth plane P 4  which extends parallel to but is also spaced or offset from and not coincident with the longitudinal axis  15  of the device  5 . The second plane P 2  extends parallel to but is spaced from the fourth plane P 4  by a distance of between about 0.075 and 0.33 inches or so, for example. Both pairs of the first and second blades  11 ′,  11 ″,  11 ′″,  11 ″″ are securely and permanently affixed to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. The radially inwardly facing edges  32  of the first pair of first and second blades  11 ′,  11  ′″ are spaced from one another by a distance of between 0.10 and 0.5 inches, preferably about 0.25 inches or so while the radially inwardly facing edges  32  of the second pair of first and second blades  11 ″,  11 ″″ are also spaced from one another by a distance of between 0.10 and 0.5 inches, preferably about 0.25 inches or so.  
      The length of the tubular member  6  from the cutting edge  10  to the proximate surface of the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. Each blade of the first and second pair of blades has a thickness of about 0.015 inches, an axial length of between 0.05 inches to 2.5 inches or so, preferably about 1.7 inches and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the previously discussed embodiments.  
      With reference now to  FIG. 13 , a still further another embodiment of the apple coring device  5  according to the present invention will now be described. According to this embodiment, the blade  11  comprises a thin metallic wire  52 , cable, rope, etc. which extends across the second end  9  of the tubular member. If desired, the thin metallic wire  52  can extend coincident with the longitudinal axis  15  or be spaced or offset therefrom. The thin metallic wire  52  must be sufficiently rigid to pass through the fruit without breaking while still being able to cut or form a closed bottom bore with the fruit upon rotation of the device  5  relative to the fruit. Typically, the thin metallic wire  52  has a thickness of between about 0.010 inches to about 0.25 inches or so, preferably between about 0.020 inches to about 0.065 inches.  
      Turning now to  FIG. 14 , a variation in the shape of the blade is shown. According to this embodiment, the blade  11  has a generally triangular shaped profile with one edge securely affixed to the inner surface of the tubular member  6 . The design provides the blade with sufficient rigidity to pass through the fruit without breaking while still being able to shear the core from a remainder of the fruit.  FIG. 15  is an embodiment very similar to  FIG. 14 , except that the profile of the blade is further modified to provide less blade surface when the device  5  is rotated with respect to the fruit to shear the core from a remainder of the fruit.  
      With reference now to  FIG. 16 , yet another embodiment of the apple coring device  5  according to the present invention will now be described. As this embodiment is very similar to the embodiment of  FIG. 8 , only the differences between this embodiment and the embodiment of  FIG. 8  will be discussed in detail.  
      According to this embodiment, the blade  11  comprises first and second elongate blades  11 ′,  11 ″. The first and second elongate blades  11 ′,  11 ″ are fixedly attached to one another such that the first blade  11 ′ lies in a first plane P 1  that extends normal to a plane P 2  defined by the second blade  11 ″. The ring or tubular member  6  is supported in a spaced relationship from the handle  8  with the first and second elongate blades  11 ′,  11 ″ interconnecting the tubular member  6  with the handle  8 . The tubular member  6  has a member cutting edge  10  which defines a member cutting edge plane and the blade cutting edges lie in the member cutting edge plane.  
      Turning now to  FIG. 17 , still another blade variation is shown. According to this embodiment, the blade  11  is “V-shaped” and comprises a pair of blades  11 ′,  11 ″ which a connected with one another along a common vertex. The opposed end of each of the blades  11 ′ and  11 ″ is connected to an inner surface  30  of the tubular member  6 . This blade arrangement provides a core shearing action as the device is rotated with respect to the fruit to remove the core.  
      With reference to  FIG. 18 , a variation of the tubular member and a further blade variation are shown. According to this embodiment, the tubular member is not cylindrical but is, instead, hexagonal in transverse cross section. In addition, the blade  11  comprises a first pair of first and second blades  11 ′,  11 ′″ and a second pair of first and second blades  11 ″,  11 ″″ which are all accommodated within the interior region  34  of the tubular member  6 . The first pair of blades  11 ′,  11 ′″ lies in and defines a first plane P 1  which extends parallel to and is coincident with the longitudinal axis  15  of the device  5  while the second pair of blades lies  11 ′″ in and defines a second plane P 2  which extends parallel to and is coincident with the longitudinal axis  15  of the device  5 . The first and second planes P 1 , P 2  extend substantially normal to one another. This arrangement of the tubular member tends to form a number air or relief passages in the fruit, as the device  5  is rotated relative to the fruit, thereby assisting with room air being sucked into the apple or other fruit as the device  5  is removed, along with the core, from the apple or other fruit.  
      With reference to  FIG. 19 , a further variation of the tubular member and a further blade variation are shown. According to this embodiment, the tubular member is substantially square in transverse cross section and the corners of the tubular member curved or arcuate is shape. This arrangement of the tubular member tends to form a number air or relief passages in the fruit, as the device  5  is rotated relative to the fruit, thereby assisting with room air being sucked into the apple or other fruit as the device  5  is removed, along with the core, from the apple or other fruit. The blade  11  comprises diametrically opposed first and second blades  11 ′,  11 ″ which are both accommodated within the interior region  34  of the tubular member  6 . Both of the first and second blades  11 ′,  11 ″ lie in and define a first plane P 1  which is coincident with the longitudinal axis  15  of the device  5 . Both of the first and second blades  11 ′,  11 ″ are securely and permanently affixed to the inner surface  30  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, etc. The substantially radially inwardly facing edges  32  of the first and second blades  11 ′,  11 ″ are spaced from one another by a distance of between about 0.25 and 0.75 inches or so with the longitudinal axis  15  of the device  5  being equally spaced from each longitudinal edge.  
      Turning now to  FIG. 20 , a further variation of the tubular member and a further blade variation are shown. According to this embodiment, the tubular member is not cylindrical but is, in stead, octagonal in transverse cross section. In addition, the blade  11  comprises a first pair of first and second blades  11 ′,  11 ′″ and a second pair of first and second blades  11 ″,  11 ″″ which are all accommodated within the interior region  34  of the tubular member  6 . The first pair of blades  11 ′,  11 ′″ lies in and defines a first plane P 1  which extends parallel to and is coincident with the longitudinal axis  15  of the device  5  while the second pair of blades lies  11 ″,  11 ″″ in and defines a second plane P 2  which extends parallel to and is coincident with the longitudinal axis  15  of the device  5 . The first and second planes P 1 , P 2  extend substantially normal to one another. This arrangement of the tubular member tends to form a number air or relief passages in the fruit, as the device  5  is rotated relative to the fruit, thereby assisting with room air being sucked into the apple or other fruit as the device  5  is removed, along with the core, from the apple or other fruit.  
      With reference now to  FIGS. 21 , and  21 A and  21 B, another embodiment of the apple coring device  5 , according to the present invention, will now be described. As this embodiment is very similar to the preceding embodiments, only the differences between this embodiment and the preceding embodiments will be discussed in detail.  
      As can be seen in  FIGS. 21 and 21 A, according to this embodiment, the blade  11  comprises a single blade  11  which is accommodated within the interior region  34  of the tubular member  6 . The single blade  11  lies in and defines a first plane P 1  which is coincident—although this in not required—with the longitudinal axis  15  of the device  5 . One edge of the single blade  11  is securely and permanently affixed with the inner surface  30  of the tubular member  6 , adjacent the second end  9  of the tubular member  6  in a known manner, e.g., an adhesive, rivets, slots, welding, being formed integral therewith, etc. The substantially radially inwardly facing edge  32  of the single blade  11  is spaced from the longitudinal axis  15  of the device  5  by a distance of between about 0.25 and 0.75 inches or so. The first end  7  of the tubular member  6  is affixed to the handle  8 .  
      The tubular member  6  with the single blade  11  is preferably stamped from a piece of sheet metal into the configuration shown in  FIG. 21B . Thereafter, the sheet metal is formed into a circular or cylindrical shape an elongate cutout or gap  44  extending along the sidewall  40  of the tubular member  6  from the first end  7  to the second end  9 . The elongate cutout or gap  44  forms an air passageway along the tubular member  6  which allows air to be supplied toward a base of the closed bottomed bore formed in the apple or the other fruit by the device  5  as the core is being removed therefrom as discussed above. As the sheet metal is formed into a circular or cylindrical shape the tab is bent inward to form the single blade  11 . It is to be appreciated that although the device  5  is describe as having a single blade  11 , as one skill in the art would appreciate, any one of the other disclosed blade arrangements may be utilized in this embodiment.  
      The length of the tubular member  6  from the cutting edge  10  to the proximate surface of the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. The blade  11  has a thickness of about 0.015 inches, an axial length of between about 0.05 inches to 2.5 inches or so, preferably about 0.25 inches or so and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the previously discussed embodiments.  
      Preferably the cutting edge  10  of the tubular member  6  is circular and the member cutting edge  10  and the cutting edge  17  of the blade(s)  11  all lie in a cutting plane CP as this will assist the device in creating a substantially flat bottom for the closed bottom bore to be formed in the apple or other fruit.  
      With reference now to FIGS.  22 A-C, still another embodiment of the apple coring device  5  according to the present invention will now be described. As this embodiment is very similar to the previous embodiments, only the differences between this embodiment and the previous embodiments will be discussed in detail.  
      As can be seen in FIGS.  22 A-C, according to this embodiment, the blade  11  comprises a pair of blades  11  which are both located within the interior region  34  of the tubular member  6 . The pair of blades  11  lie in and define a first plane P 1  which is coincident—although this in not required—with the longitudinal axis  15  of the device  5 . The supporting edge of each blade  11  is formed from a portion of the side wall of the tubular member  6 . That is, a diagonal cut C is made in the side wall of the tubular member  6  from the second end  9  toward, but not all the way to, the first end  7 , i.e., the cut C only extends generally less than half way along the side wall. Thereafter, the free end of the cut side wall is bent inwardly along a fold line F, extending parallel to the longitudinal axis  15  of the apple coring device  5 , such that the inwardly directed triangular side wall portion forms the cutting blade  11 . The substantially radially inwardly facing free end of each blade  11  is spaced from the longitudinal axis  15  of the device  5  by a distance of between about 0.125 and 0.75 inches or so. The first end  7  of the tubular member  6  is affixed to the handle  8  in a conventional manner.  
      The tubular member  6  with the integral pair of blades  11  is preferably stamped from a single piece of sheet metal into the configuration shown in  FIG. 22B . The length of the tubular member  6  from the cutting edge  10  to the proximate surface of the handle  8  is about 1 inch to 2.5 inches or so, preferably about 1.7 inches and the inside diameter of the tubular member  6  is about 0.25 inches to 2 inches or so, preferably about 1 inch. The blade  11  has a thickness of about 0.015 inches, an axial length of between about 0.05 inches to 2.5 inches or so, preferably about 0.25 inches or so and a radial width of about 0.15 inches to 0.75 inches or so, preferably about 0.25 inches or so. This embodiment operates in a similar fashion to the previously discussed embodiments. Preferably the cutting edge  10  of the tubular member  6  is circular and the member cutting edge  10  and the cutting edge  17  of the blade(s)  11  all lie in a cutting plane CP as this will assist the device in creating a substantially flat bottom for the closed bottom bore to be formed in the apple or other fruit.  
      Each one of the above discussed embodiments may be equipped with a depth stop, e.g., one or more removable/adjustable ring(s), spacer(s), etc. or some other conventional adjustable stop member may be provided on the exterior surface of the tubular member  6  to limit the amount that the tubular member  6  can penetrate into the fruit. The depth stop facilitates formation of uniform depth closed end bores in the fruit. For many applications, the handle  8  functions as the stop member.  
      Since certain changes may be made in the above described improved fruit coring device, without departing from the spirit and scope of the invention herein involved, it is intended that all of the subject matter of the above description or shown in the accompanying drawings shall be interpreted merely as examples illustrating the inventive concept herein and shall not be construed as limiting the invention.  
     REFERENCE NUMBERS  
     
         
           1  blade  
           2  edges  
           3  handle  
           4  pointed end  
           5  apple coring device  
           6  tubular member  
           7  one end  
           8  handle  
           9  opposite end  
           10  cutting edge  
           11  blade  
           12  projections  
           13  openings  
           14  tapers  
           15  longitudinal axis  
           16  width  
           17  cutting edge  
           18  slots  
           19  thickness  
           20  width  
           21  ring  
           22  serrated edge  
           30  inner surface  
           32  radially inwardly facing edges  
           33  legs or other supports  
           34  interior region  
           36  opposed ends  
           38  recess  
           40  sidewall  
           44  cutout  
           50  opening  
           52  wire  
          P 1  first plane  
          P 2  second plane  
          P 3  third plane  
          P 4  fourth plane