阅读说明：本技术 一种腊制兔肉用兔肉切丝装置 (Rabbit meat shredding device for preserved rabbit meat ) 是由 刘红宇 金晶 赵颖 于 2021-09-09 设计创作，主要内容包括：本发明涉及切丝装置技术领域,且公开了一种腊制兔肉用兔肉切丝装置,包括设备外壳,所述设备外壳的内腔底部固定安装有储能机构,所述储能机构的内腔固定连接有连接线,所述设备外壳的内腔活动安装有刀片滚筒,所述刀片滚筒的内部固定安装有滑轨一,所述滑轨一的内腔设置有触点开关,所述触点开关的底部固定连接有导线,所述导线的另一端固定连接有阻挡门机构,所述阻挡门机构的右侧固定安装有清洁块,所述设备外壳的内腔中部固定安装有导轨,当刀片滚筒与阻挡门机构接触时,延长块对刀片滚筒缝隙进行清洁,刀片滚筒在齿道作用下,开始旋转与清洁块挤压清洁,当到达顶端下降时,通过连接线对发条弹簧进行收缩蓄能。(The invention relates to the technical field of shredding devices, and discloses a rabbit meat shredding device for preserved rabbit meat, which comprises an equipment shell, wherein an energy storage mechanism is fixedly arranged at the bottom of an inner cavity of the equipment shell, a connecting wire is fixedly connected with the inner cavity of the energy storage mechanism, a blade roller is movably arranged in the inner cavity of the equipment shell, a first sliding rail is fixedly arranged inside the blade roller, a contact switch is arranged in the inner cavity of the first sliding rail, the bottom of the contact switch is fixedly connected with a conducting wire, the other end of the conducting wire is fixedly connected with a blocking door mechanism, a cleaning block is fixedly arranged on the right side of the blocking door mechanism, a guide rail is fixedly arranged in the middle of the inner cavity of the equipment shell, when the blade roller is in contact with the blocking door mechanism, an extension block cleans gaps of the blade roller, the blade roller starts to rotate and is extruded and cleaned by the cleaning block under the action of a tooth path, when the spring reaches the top end and descends, the spring is contracted through the connecting wire to store energy.)

1. The utility model provides a rabbit meat shred device for cured rabbit meat, includes equipment shell (1), its characterized in that: the utility model discloses an equipment for cleaning the door, including equipment shell (1), inner chamber bottom fixed mounting of equipment shell (1) has energy storage mechanism (2), the inner chamber fixedly connected with connecting wire (3) of energy storage mechanism (2), the inner chamber movable mounting of equipment shell (1) has blade cylinder (4), slide rail (5) have been seted up to blade cylinder (4) device shell inner wall, the inner chamber of slide rail (5) is provided with contact switch (6), the bottom fixedly connected with wire (7) of contact switch (6), the other end fixedly connected with of wire (7) blocks door mechanism (8), the right side fixed mounting that blocks door mechanism (8) has cleaning block (9), the inner chamber middle part fixed mounting of equipment shell (1) has guide rail (10).

2. The rabbit meat slicer according to claim 1, wherein: a sliding groove (21) is formed in the energy storage mechanism (2), a blocking block (22) is fixedly mounted in the sliding groove (21), and a clockwork spring (23) is arranged in an inner cavity of the energy storage mechanism (2).

3. The rabbit meat slicer according to claim 1, wherein: a first central shaft (41) is fixedly installed inside the blade roller (4), and gears (42) are fixedly installed on the left side and the right side of the blade roller (4).

4. The rabbit meat slicer according to claim 1, wherein: the front side and the rear side of the inner wall of the blade roller (4) device shell are respectively provided with a first sliding rail (5), and the inner cavity of the blade roller (4) device shell is provided with a second sliding rail (51).

5. The rabbit meat slicer according to claim 1, wherein: the bottom fixed mounting who blocks a mechanism (8) has end piece (81), the inner chamber bottom fixed mounting of end piece (81) has electromagnetic block (82), the inner chamber middle part fixed mounting of end piece (81) has spring (83), the inner chamber top fixed mounting of end piece (81) has magnet (84), well piece (85) are installed at the top of magnet (84), the top fixed mounting of well piece (85) has extension piece (86), the quantity of extension piece (86) and the gap quantity phase-match of blade cylinder (4), hole (87) in the middle of having seted up in the inside of extension piece (86), the top fixed mounting who blocks a mechanism (8) has kicking block (88), the inner chamber fixed mounting of kicking block (88) has spring two (89), the inner chamber bottom movable mounting of kicking block (88) has well piece two (810), and the bottom of the middle block II (810) is fixedly provided with an extension block (86).

6. The rabbit meat slicer according to claim 1, wherein: the surface of clean piece (9) is provided with sponge (91), the inside evenly distributed of sponge (91) has lead wire (911), the left side fixed mounting of clean piece (9) has supplementary piece (92), the right side swing joint of clean piece (9) has center pin two (93), the surface of center pin two (93) is provided with bottle plug (94), the surface of center pin two (93) is seted up flutedly (95), the surface winding connecting wire (3) of recess (95), the right side fixed mounting of center pin two (93) has fixed block (96), the quantity of clean piece (9) and the gap quantity phase-match of blade cylinder (4).

7. The rabbit meat slicer according to claim 1, wherein: the bottom of the inner cavity of the guide rail (10) is fixedly provided with a tooth print matched with the gear (42), the width of the guide rail (10) is matched with the gear (42), and the distance between the guide rail (10) and the first sliding rail (5) is matched with the diameter of the gear (42).

Technical Field

The invention relates to the technical field of shredding devices, in particular to a rabbit meat shredding device for preserved rabbit meat.

Background

The shredding device is a mechanical device designed for shredding, the modern main industry related to shredding uses the food industry as the main tobacco industry for assisting, the shredding device has an indispensable position in the food industry, the shape of food can be changed by the shredder, the shape and the thickness of shredding can be set through mechanical full automation, the automation level is improved, the labor cost is reduced, the working efficiency is improved, and the enterprise operation cost is also reduced.

Among the prior art, especially to the field of filament cutter cylinder maintenance of filament cutter, solve remaining material residue and the blade cylinder surface through the manual work in the blade cylinder gap and be stained with the oil stain of gluing through the manual work generally, but manual cleaning inefficiency and not thorough, generally need disassemble the machine and clean, waste time and energy inefficiency.

Therefore, a rabbit meat shredding device for preserved rabbit meat is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a rabbit meat shredding device for preserved rabbit meat, which has the advantages of quickly cleaning residues in gaps of a blade roller and oil stains on the outer surface of the blade roller, and solves the problems of residue accumulated in the gaps of the blade roller and oil stains on the surface of a blade body.

(II) technical scheme

In order to achieve the purpose of cleaning the residue in the gaps of the blade roller and the stains on the outer surface of the blade roller, the invention provides the following technical scheme: the utility model provides a rabbit meat shred device for cured rabbit meat, includes the equipment shell, the inner chamber bottom fixed mounting of equipment shell has energy memory, energy memory's inner chamber fixedly connected with connecting wire, the inner chamber movable mounting of equipment shell has the blade cylinder, the inside fixed mounting of blade cylinder has slide rail one, the inner chamber of slide rail one is provided with the contact switch, the bottom fixedly connected with wire of contact switch, the other end fixedly connected with of wire blocks a mechanism, the right side fixed mounting that blocks a mechanism has the cleaning block, the inner chamber middle part fixed mounting of equipment shell has the guide rail.

Preferably, the energy storage mechanism's inside has been seted up the spout, the inside fixed mounting of spout has the piece that blocks, energy storage mechanism's inner chamber is provided with clockwork spring, blocks the piece and plays the effect of control clockwork spring switch through removing in the spout is inside.

Preferably, a first central shaft is fixedly installed inside the blade roller, gears are fixedly installed on the left side and the right side of the blade roller, and the first central shaft is located at the circle center of the blade roller.

Preferably, the left side and the right side of the blade roller are provided with a first sliding rail, the upper side and the lower side of the interior of the blade roller are provided with a second sliding rail, the first sliding rail is highly positioned in the middle of the second sliding rail, and the second sliding rail penetrates through the upper side and the lower side of the blade roller.

Preferably, the bottom fixed mounting who blocks a mechanism has the end piece, the inner chamber bottom fixed mounting of end piece has the electromagnetism piece, the inner chamber middle part fixed mounting of end piece has spring one, the inner chamber top fixed mounting of end piece has magnet, well piece one is installed at the top of magnet, the top fixed mounting of well piece one has the extension piece, the quantity of extension piece and the gap quantity phase-match of blade cylinder, the centre bore has been seted up to the inside of extension piece, the top fixed mounting who blocks a mechanism has the kicking block, and the inner chamber fixed mounting of kicking block has spring two, and the inner chamber bottom movable mounting of kicking block has well piece two, and the bottom fixed mounting of well piece two has the extension piece, and the gap size phase-match of extension piece and blade cylinder can improve clean efficiency.

Preferably, the surface of cleaning piece is provided with the sponge, and the inside evenly distributed of sponge has the lead wire, the left side fixed mounting of cleaning piece has supplementary piece, the right side swing joint of cleaning piece has center pin two, the surface of center pin two is provided with the bottle plug, the surface of center pin two is seted up flutedly, the surface winding connecting wire of recess, the right side fixed mounting of center pin two has the fixed block, and the quantity of cleaning piece and the gap quantity phase-match of blade cylinder make the inside cleaning solution of cleaning piece lead to the sponge through the lead wire guide when the cleaning piece is rotatory for the sponge can be even be rich in the cleaning solution, improves clean effect.

Preferably, the bottom of the guide rail inner cavity is fixedly provided with a tooth print matched with the gear, the width of the guide rail is matched with the gear, the distance between the guide rail and the first sliding rail is not more than the diameter of the gear, and the gear is easier to rotate due to the tooth print on the bottom of the guide rail inner cavity.

(III) advantageous effects

Compared with the prior art, the invention provides the laser cutting machine capable of automatically adjusting the focusing of the laser beam, which has the following beneficial effects:

1. this rabbit meat shred device is used to wax system rabbit meat, through stopping door mechanism and slide rail one, when this equipment starts, under power supply energy storage mechanism's effect, the blade cylinder moves right along slide rail one, start the contact switch when removing, thereby make and block that door mechanism opens, when blade cylinder and block that door mechanism contact, the gap of extension piece and blade cylinder extrudees closely and presses close to, thereby the residue between the gap of extension piece to the blade cylinder is rejected cleanly.

2. This rabbit meat shred device is used to wax system rabbit meat, through clean piece and guide rail, when this equipment starts, under power supply energy storage mechanism's effect, the blade cylinder removes right along the guide rail, the gear is under the tooth track effect of guide rail inner chamber bottom, it is rotatory that its self begins when the upper right side removes, clean piece begins to rotate under clockwork spring's effect, make cleaning solution distribute evenly among the clean piece, thereby the blade cylinder extrudees rotatory cleanness with clean piece, the spot of blade surface is cleaned, when the blade cylinder reachs the top of central guide rail, begin to move down under the effect of gravity, thereby clean and simultaneously shrink the energy storage to clockwork spring through the connecting wire to blade cylinder self surface once more.

Drawings

FIG. 1 is a schematic front view of the overall structure of the present invention;

FIG. 2 is a schematic view of the energy storage mechanism of the present invention;

FIG. 3 is an enlarged view of the middle portion of the stop gate of the present invention;

fig. 4 is a schematic view of the internal structure of the cleaning block of the present invention.

In the figure: 1. an equipment housing; 2. an energy storage mechanism; 21. a chute; 22. a blocking block; 23. a clockwork spring; 3. a connecting wire; 4. a blade drum; 41. a first central shaft; 42. a gear; 5. a first slide rail; 51. a second slide rail; 6. a contact switch; 7. a wire; 8. a barrier door mechanism; 81. a bottom block; 82. an electromagnetic block; 83. a first spring; 84. a magnet; 85. a middle block I; 86. a lengthening block; 87. a middle hole; 88. a top block; 89. a second spring; 810. a middle block II; 9. a cleaning block; 91. a sponge; 911. a lead wire; 92. an auxiliary block; 93. a central shaft II; 94. a bottle stopper; 95. a groove; 96. a fixed block; 10. a guide rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-3, a rabbit meat shredding device for cured rabbit meat comprises an equipment housing 1, an energy storage mechanism 2 is fixedly mounted at the bottom of an inner cavity of the equipment housing 1, a chute 21 is formed in the energy storage mechanism 2, a stop block 22 is fixedly mounted in the chute 21, a clockwork spring 23 is arranged in the inner cavity of the energy storage mechanism 2, the stop block 22 moves in the chute 21 to control the clockwork spring 23 to open and close, a connecting wire 3 is fixedly connected to the inner cavity of the energy storage mechanism 2, a blade roller 4 is movably mounted in the inner cavity of the equipment housing 1, a central shaft I41 is fixedly mounted in the blade roller 4, gears 42 are fixedly mounted on the left side and the right side of the blade roller 4, the central shaft I41 is located at the center of the blade roller 4, the gears 42 are located at the center of the blade roller 4, and slide rails I5 are arranged on the left side and the right side of the blade roller 4, the sliding rail I5 is contacted with the bottom of the central shaft I41, the upper side and the lower side of the interior of the blade roller 4 are respectively provided with a sliding rail II 51, the height of the sliding rail I5 is positioned in the middle of the sliding rail II 51, the sliding rail II 51 is matched with a gap of the blade roller 4, the movement of the blade roller 4 is assisted through the sliding rail II 51, so that the blade roller 4 cannot swing left and right, the inner cavity of the sliding rail I5 is provided with a contact switch 6, the bottom of the contact switch 6 is fixedly connected with a lead 7, the other end of the lead 7 is fixedly connected with a blocking door mechanism 8, the bottom of the blocking door mechanism 8 is fixedly provided with a bottom block 81, the bottom of the inner cavity of the bottom block 81 is fixedly provided with an electromagnetic block 82, the middle of the inner cavity of the bottom block 81 is fixedly provided with a spring I83, the top of the inner cavity of the bottom block 81 is fixedly provided with a magnet 84, the top of the magnet 84 is provided with a middle block I85, and the top of the middle block I85 is fixedly provided with an extension block 86, the number of the extension blocks 86 is matched with the number of gaps of the blade roller 4, middle holes 87 are formed in the extension blocks 86, a top block 88 is fixedly installed at the top of the blocking door mechanism 8, a spring two 89 is fixedly installed in an inner cavity of the top block 88, a middle block two 810 is movably installed at the bottom of the inner cavity of the top block 88, the extension blocks 86 are fixedly installed at the bottom of the middle block two 810, the sizes of the gaps of the extension blocks 86 and the blade roller 4 are matched, the cleaning efficiency can be improved, when the electromagnetic block 82 is started, the middle block one 85 can move downwards through magnetic attraction, the aperture of the middle hole 87 is larger than that of the connecting wire 3, the better passing of the middle block is facilitated, a cleaning block 9 is fixedly installed on the right side of the blocking door mechanism 8, a guide rail 10 is fixedly installed in the middle of the inner cavity of the equipment shell 1, a tooth print matched with the gear 42 is fixedly installed at the bottom of the inner cavity of the guide rail 10, and the width of the guide rail 10 is matched with the gear 42, the distance between the guide rail 10 and the sliding rail 5 does not exceed the diameter of the gear 42.

When the rabbit meat shredding device is started, firstly, the blocking block 22 on the energy storage mechanism 2 moves leftwards through the sliding groove 21 to remove the limitation on the clockwork spring 23, the clockwork spring 23 starts to rotate to disperse energy, so that the blade roller 4 is driven to move rightwards through the connecting wire 3, under the limiting action of the sliding rail II 51, the blade roller 4 stably moves rightwards, after moving for a certain distance, the contact switch 6 in the sliding rail I5 is touched, the contact switch 6 conducts electricity on the electromagnetic block 82 at the bottom of the inner cavity of the blocking door mechanism 8 through the conducting wire 7, the electromagnetic block 82 is always kept in a power-off state, under the power-off state, no interaction force exists between the electromagnetic block 82 and the magnet 84, the middle block I85 moves upwards under the action of the spring I83, and is in contact with the middle block II 810 through the extension block 86, so that the blocking door mechanism 8 is in a closed state, when the electromagnetic block 82 at the bottom is electrified, the electromagnetic block 82 generates attraction force on the magnet 84, the magnet 84 drives the first middle block 85 to move downwards, the blade roller 4 simultaneously extrudes the second middle block 810 and the first middle block 85, the blade roller 4 simultaneously extrudes and drives the second middle block 810 to move upwards, when the blade roller 4 continuously moves rightwards, the gap between the extension block 86 and the blade roller 4 is extruded to be tightly attached, and therefore residues between the gap of the blade roller 4 are removed and cleaned by the extension block 86.

In conclusion, this filament cutting device, this device can make extension block 86 extrude closely laminating with the gap of blade cylinder 4, and extension block 86 rejects the cleanness to the residue between the gap of blade cylinder 4, compares in the ordinary filament cutter between the manual clean sword gap in the past, can improve clean efficiency, saves the human cost.

Example two

Referring to fig. 1, 2 and 4, a rabbit meat shredding device for preserved rabbit meat comprises an equipment shell 1, an energy storage mechanism 2 is fixedly installed at the bottom of an inner cavity of the equipment shell 1, a sliding groove 21 is formed in the energy storage mechanism 2, a blocking block 22 is fixedly installed in the sliding groove 21, a clockwork spring 23 is arranged in the inner cavity of the energy storage mechanism 2, the blocking block 22 moves in the sliding groove 21 to control the clockwork spring 23 to open and close, a connecting wire 3 is fixedly connected to the inner cavity of the energy storage mechanism 2, a blade roller 4 is movably installed in the inner cavity of the equipment shell 1, a central shaft I41 is fixedly installed in the blade roller 4, gears 42 are fixedly installed on the left side and the right side of the blade roller 4, the central shaft I41 is located at the circle center position of the blade roller 4, a sliding rail I5 is fixedly installed in the blade roller 4, the inner cavity of the shell of the blade roller 4 device is provided with a second sliding rail 51, the second sliding rail 51 penetrates through the upper side and the lower side of the blade roller 4, so that the movement direction of the blade roller 4 is limited through the second sliding rail 51 to prevent the blade roller 4 from swinging left and right, the inner cavity of the first sliding rail 5 is provided with a contact switch 6, the bottom of the contact switch 6 is fixedly connected with a lead 7, the other end of the lead 7 is fixedly connected with a blocking door mechanism 8, the bottom of the blocking door mechanism 8 is fixedly provided with a bottom block 81, the bottom of the inner cavity of the bottom block 81 is fixedly provided with an electromagnetic block 82, the middle of the inner cavity of the bottom block 81 is fixedly provided with a first spring 83, the top of the inner cavity of the bottom block 81 is fixedly provided with a magnet 84, the top of the magnet 84 is provided with a first middle block 85, the top of the first middle block 85 is fixedly provided with an extension block 86, the number of the extension block 86 is matched with the number of gaps of the blade roller 4, and a middle hole 87 is formed inside the extension block 86, the top of the blocking door mechanism 8 is fixedly provided with a top block 88, the inner cavity of the top block 88 is fixedly provided with a spring II 89, the bottom of the inner cavity of the top block 88 is movably provided with a middle block II 810, the bottom of the middle block II 810 is fixedly provided with an extension block 86, the gap size of the extension block 86 is matched with that of the blade roller 4, the cleaning efficiency can be improved, when the electromagnetic block 82 is started, the middle block I85 can be moved downwards through magnetic attraction, the aperture of the middle hole 87 is larger than that of the connecting wire 3, the better passing of the middle hole is facilitated, the right side of the blocking door mechanism 8 is fixedly provided with a cleaning block 9, the outer surface of the cleaning block 9 is provided with a sponge 91, the inner part of the sponge 91 is uniformly distributed with leads 911, the left side of the cleaning block 9 is fixedly provided with an auxiliary block 92, the right side of the cleaning block 9 is movably connected with a central shaft II 93, the outer surface of the central shaft II 93 is provided with a bottle plug 94, the outer surface of the central shaft II 93 is provided with a groove 95, the connecting wire 3 is wound on the outer surface of the groove 95, the fixing block 96 is fixedly arranged on the right side of the central shaft II 93, the number of the cleaning blocks 9 is matched with the number of gaps of the blade roller 4, when the cleaning block 9 is rotated, so that the cleaning liquid inside the cleaning block 9 is guided to the sponge 91 through the lead 911, make sponge 91 can be even be rich in the cleaning solution, improve clean effect, equipment housing 1's inner chamber middle part fixed mounting has guide rail 10, guide rail 10 inner chamber bottom fixed mounting have with gear 42 assorted tooth seal, guide rail 10's width and gear 42 phase-match, distance between guide rail 10 and the slide rail 5 and gear 42's diameter phase-match, the tooth seal on the guide rail 10 inner chamber bottom makes gear 42 rotate more easily, the width phase-match makes gear 42 can not break away from guide rail 10, the distance makes gear 42 can arrive on the guide rail 10 according to setting for the route with gear 42's diameter phase-match.

Before the rabbit meat shredding device is started, firstly, the bottle stopper 94 is opened, cleaning liquid is injected into the central shaft II 93, when the rabbit meat shredding device is started, firstly, the limit of the clockwork spring 23 is relieved by the stop block 22 on the energy storage mechanism 2, the clockwork spring 23 starts to release energy, so that the blade roller 4 is driven to move through the connecting wire 3, under the limit action of the sliding rail II 51, the blade roller 4 stably moves towards the right direction, after moving for a certain distance, the contact switch 6 in the sliding rail I5 is touched, the contact switch 6 conducts electricity to the electromagnetic block 82 at the bottom of the inner cavity of the door blocking mechanism 8 through the conducting wire 7, the electromagnetic block 82 is kept in a power-off state until now, no interaction force exists between the electromagnetic block 82 and the magnet 84 in the power-off state, the middle block I85 moves upwards under the action of the spring I83, and is contacted with the middle block II 810 through the extension block 86, so that the door blocking mechanism 8 is in a closed state, when the electromagnetic block 82 at the bottom is electrified, the electromagnetic block 82 generates attraction force on the magnet 84, so that the first middle block 85 moves downwards, the second middle block 810 and the first middle block 85 are extruded by the blade roller 4, so that the second middle block 810 is driven to move upwards, when the blade roller 4 continuously moves rightwards, the extension block 86 is extruded to be tightly attached to the gap of the blade roller 4, and therefore residues between the gap of the blade roller 4 are removed and cleaned by the extension block 86;

when the blade roller 4 is dragged by the first sliding rail 5 to be smoothly butted with the guide rail 10, the blade roller 4 moves towards the upper right side and simultaneously starts to rotate and is contacted with the cleaning block 9 under the action of a tooth path at the bottom of an inner cavity of the guide rail 10, the clockwork spring 23 drives the second central shaft 93 to rotate through the connecting line 3, the second central shaft 93 drives the cleaning block 9 to rotate, cleaning liquid in the cleaning block 9 is diffused to sponge 91 through the lead 911 while the cleaning liquid rotates, the blade roller 4 rotates and the cleaning block 9 rotates, the cleaning block 9 is positioned between gaps of the blade roller 4, the cleaning block 9 is contacted with the cleaning block and the sponge 91 to clean the outer surface of the blade roller 4, when the blade roller 4 rotates to the top end of the guide rail 10, the blade roller 4 moves downwards left and simultaneously rotates and cleans again under the action of gravity, and the blade roller 4 drives the clockwork spring 23 to contract and store energy through the connecting line 3, the next use is convenient.

In conclusion, compared with the prior common filament cutter which cleans the space between the blade points manually, the filament cutter can fully clean the knife gap and the outer surface of the blade body of the blade roller 4, thereby saving the manual operation steps, saving the labor cost and improving the working efficiency.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.