Cutting device

Abstract

A cutting device is provided. The device includes a delivery tower assembly configured to be attached to an object and a frame assembly movably attached thereto. In one embodiment, the frame assembly has an arm assembly thereon, which receives a cutting member, and at least one arm assembly can pivot relative to another arm assembly and relative to the delivery tower assembly. One arm assembly can further move in a vertical direction relative to another arm assembly and relative to the delivery tower assembly. A cutting device is provided. The device includes a delivery tower assembly configured to be attached to an object and a frame assembly movably attached thereto. In one embodiment, the frame assembly has an arm assembly thereon, which receives a cutting member, and at least one arm assembly can pivot relative to another arm assembly and relative to the delivery tower assembly. One arm assembly can further move in a vertical direction relative to another arm assembly and relative to the delivery tower assembly.

Description

[0001] Related Applications

[0002] This application is a divisional application of an invention patent application with an application date of June 8, 2018, an international application number of PCT / US2018 / 036640, a national application number of 201880048795.X, and an invention name of “Cutting Device”.

[0003] This application claims priority to U.S. Provisional Application No. 62 / 517,275, filed on June 9, 2017, the specification of which is incorporated herein by reference in its entirety. Technical Field

[0004] The present invention relates generally to cutting devices, and more particularly to cutting devices including a wire cutting member for cutting an object, such as a pipe. Background Art

[0005] A cutting device that includes a wire for cutting a product is generally referred to as a wire saw. Wire saws are bulky items and may be unsafe to operate. Bulky wire saws are limited in the environment in which they can operate and consume a large amount of space when not in use. In addition, the wire saw may not adequately engage the pipe, or the operator may operate the wire saw in an unsafe position, thereby placing the operator at risk when operating the wire saw. Summary of the invention

[0006] The present invention is defined by the following claims, and nothing in this section should be taken as a limitation on those claims.

[0007] Therefore, it is desirable to have a cutting device including a wire cutting member that is compact and safe to operate. A compact wire saw will be used in more environments, and a safe wire saw will reduce the operator's exposure to danger when operating the wire saw.

[0008] In one aspect, a cutting device is provided.

[0009] In one aspect, a method of cutting an object is provided.

[0010] In one aspect, a cutting device is provided that is movable between a first position and a second position, and the cutting device is more compact in the first position than in the second position.

[0011] In one aspect, a cutting device is provided, the cutting device comprising a delivery tower assembly configured to be attached to an object and a frame assembly that can be movably attached to the object. The frame assembly has an arm assembly thereon that receives a cutting member. At least one arm assembly can pivot relative to another arm assembly and relative to the delivery tower assembly. One arm assembly can further move in a vertical direction relative to another arm assembly and relative to the delivery tower assembly.

[0012] In one aspect, a cutting device includes a delivery tower assembly configured to be attached to an object and a frame assembly movably attached to the object. The frame assembly has an arm assembly thereon that receives a cutting member. A liquid spray system for cooling components of a cutting device is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present disclosure may be better understood with reference to the following drawings and descriptions. The components in the drawings are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the present disclosure.

[0014] Figure 1 is a top front perspective view of one example of a cutting device according to one aspect of the present disclosure, wherein the cutting device is shown in an operating position;

[0015] Figure 2 is a top rear perspective view of the cutting device;

[0016] Figure 3 is a front view of the cutting device;

[0017] Figure 4 is a top front perspective view of a cutting device according to one aspect of the present disclosure, wherein the cutting device is shown in a storage position;

[0018] Figure 5 is a front view of a cutting device, wherein the cutting device is shown in an operating position and a cover of the cutting device is removed;

[0019] Figure 6 is a rear view of the cutting device;

[0020] Figure 7 is a top front exploded perspective view of a cutting device, wherein the cutting device is shown in an operating position;

[0021] Figure 8 is a top front perspective view of a delivery tower assembly of a cutting device;

[0022] Fig. 9 is the main view of the delivery tower component;

[0023] Fig.10 is a top front perspective view of a frame base assembly and cutting member of a cutting device with a cover removed;

[0024] Fig.11 is a front view of a frame base assembly and cutting member of a cutting device with a cover removed;

[0025] Fig.12 is a top rear perspective view of a frame base assembly and cutting member of a cutting device with a cover removed;

[0026] Fig.13 is a rear view of the frame base assembly and cutting member of the cutting device with the cover removed;

[0027] Fig.14 is a top front perspective view of a wire tensioning assembly of a cutting device;

[0028] Fig.15 is the front view of the wire tensioning assembly;

[0029] Fig.16 is a top view of the wire tensioning assembly;

[0030] Fig.17 is a cross-sectional view of the wire tensioning assembly;

[0031] Fig.18 is a cross-sectional view of the wire tensioning assembly;

[0032] Fig.19 is a top front perspective view of a tension indicator mechanism of a cutting device;

[0033] Fig. 20 is a top front perspective view of a right arm assembly of the cutting device;

[0034] Fig.21 is a front view of the right arm assembly with the arm plate removed;

[0035] Fig. 22 is a partial front view of the cutting device with the arm plate of the right arm assembly removed and the cover removed;

[0036] Fig.23 is a top front perspective view of a left arm assembly of the cutting device;

[0037] Fig.24 is a front view of the left arm assembly with the arm plate removed;

[0038] Fig.25 is a partial front view of the cutting device with the arm plate of the left arm assembly removed and the cover removed;

[0039] Fig.26 is a perspective view of a pin for holding the cover in a closed position;

[0040] Fig. 27 is a side view of the pin;

[0041] Fig.28 is a partial side view of the cutting device;

[0042] Fig.29 is a perspective view of some components of the cutting device, showing the arm assembly and the liquid dispensing system;

[0043] Fig.30 is a front view of some components of the cutting device showing the arm assembly and the liquid dispensing system with the front plate removed;

[0044] Fig.31 is a rear view of some components of the cutting device, showing the arm assembly and the liquid dispensing system;

[0045] Fig.32 is a perspective view of a right liquid channel block of a liquid distribution system;

[0046] Fig.33 is a top view of the right liquid channel block, showing the internal channels in dotted lines;

[0047] Fig.34 is a perspective view of a left liquid channel block of a liquid distribution system;

[0048] Fig.35 is a top view of the left liquid channel block, showing the internal channels in dotted lines;

[0049] Fig.36 is a perspective view of a mounting pin housing of a liquid dispensing system;

[0050] Fig.37 is a first cross-sectional view of the mounting pin housing;

[0051] Fig.38 is a second cross-sectional view of the mounting pin housing;

[0052] Fig.39 is a front perspective view of the arm mounting pin;

[0053] Fig.40 is a rear perspective view of the arm mounting pin;

[0054] Fig.41 is a top view of the arm mounting pin showing the internal bore and passage in phantom; and

[0055] Fig.42 is a top view of the arm mounting pin showing a cross section of the mounting pin housing. DETAILED DESCRIPTION

[0056] Referring to the accompanying drawings, an example of a cutting device 20 is shown. The cutting device 20 may also be referred to as a wire saw. In this example, the cutting device 20 may be in a first or operating position (see Figure 1-3) and second, non-operable or storage location (see Figure 4 ). When the cutting device 20 is in the operating position, the cutting device 20 is capable of cutting an object. The cutting device 20 is suitable for cutting a variety of objects. In one aspect, the cutting device 20 is suitable for cutting cylindrical hollow tubes. In such an example, the cutting device 20 can cut tubes of various diameters. For example, the cutting device 20 is capable of cutting tubes with an outer diameter of up to about 9.6 inches.

[0057] In the stored position, the cutting device 20 is very compact and can be introduced into many small or tight environments where conventional cutting devices or wire saws cannot be introduced into such environments and therefore cannot be utilized. Thus, the compactness of the cutting device 20 allows it to be used in a large number of additional environments. In one example, the compactness of the cutting device 20 allows the cutting device 20 to enter and pass through a manhole in the ground in order to enter an underground environment. Conventional cutting devices and wire saws cannot pass through manholes, thereby preventing the use of such conventional cutting devices and wire saws in underground environments.

[0058] The cutting device 20 has a compact size and shape in both the operating position and the storage position. In the illustrated example, the cutting device 20 has a width W of approximately 12 inches, a depth D of approximately 12 inches, and a height H of approximately 29 inches in the storage position. The cutting device 20 with these dimensions will be able to easily fit into a tight or small space, such as through a manhole in the ground. These illustrated dimensions of the cutting device 20 are merely examples of various possible dimensions and are not intended to limit the present disclosure. On the contrary, the cutting device 20 can have other dimensions in the storage position, but still enable the cutting device 20 to be compact and suitable for and through a small or tight environment. All such dimensional possibilities of the cutting device 20 are within the spirit and scope of the present invention.

[0059] The cutting device 20 includes a delivery tower assembly 22, which is attached to an object to be cut (not shown), such as a pipe, and is stationary relative to the object; a frame assembly 24, which is movable relative to the delivery tower assembly 22; and a cutting member 26, which is detachably connected to the frame assembly 24, see Figure 7 . In the example shown, the cutting member 26 is a wire. In one example, the cutting member 26 can be a braided wire with diamond particles on its exterior. The wire cutting member 26 can have a variety of lengths, and all of these possibilities are within the spirit and scope of the present invention. In one example, the cutting device 20 is characterized as including a wire cutting member of approximately 95 inches to approximately 105 inches. The cutting device 20 of the present disclosure is able to accommodate such lengths of wire cutting members 26 due to its construction (described in more detail below).

[0060] Delivery tower assembly 22 Figure 8 and 9, and includes a lower saddle 28, a top guide plate 30, a pair of guide shafts 32, 34 extending between and coupled to the lower saddle 28 and the top guide plate 30, a delivery tower tube 36 extending between and coupled to the lower saddle 28 and the top guide plate 30, a coupling assembly 38 for coupling the delivery tower assembly 22 to an object, and a frame height adjustment mechanism 40 configured to move the frame assembly 24 relative to the delivery tower assembly 22 to cut the object.

[0061] The cutting device 20 can include a variety of different coupling assemblies to couple the cutting device 20 to an object. The coupling assembly 38 includes a handle 42, a connector 44, a winding member 46, and an engagement surface 48. The winding member 46 is selectively wound around an object (e.g., a pipe) and connected to the connector 44. The winding member 46 can be a variety of winding members 46, such as a chain, a belt, etc. The rotation of the handle 42 causes the connector 44 to translate toward or away from the handle 42 according to the rotation direction. Translating the connector 44 toward the handle 42 tightens the winding member 46 around the object. The engagement surface 48 is arcuate or curved and engages with the winding member 46. Regardless of the size or diameter of the object, the arcuate engagement surface 48 helps to apply equal tightening force to the object to which the cutting device 20 is connected. In addition, the arcuate engagement surface 48 ensures that the winding member 46 extends out at an appropriate angle, which facilitates even distribution and equal force is applied to the object. When the cutting device 20 is attached to objects of different sizes, the winding member 46 will extend from different points of the arcuate engagement surface 48. The curved nature of the engagement surface accommodates objects of varying sizes and facilitates the application of evenly distributed and equal forces to the objects.

[0062] The saddle 28 includes a plurality of pads or saddle plates 50 adapted to engage an outer surface of an object and facilitate coupling the cutting device 20 to the object. The saddle plates 50 include engagement surfaces that are angled relative to each other and have a surface treatment that results in relatively high friction between the saddle plates 50 and the outer surface of the object. In some examples, the engagement surfaces may include protrusions or teeth.

[0063] The frame height adjustment mechanism 40 includes a shaft 52 and a delivery handle 54 configured to rotate the shaft 52. The shaft 52 is coupled to and supported by the saddle 28 at its lower end, and coupled to and supported by the top guide plate 30 at its upper end, so that the shaft 52 can rotate relative to the saddle 28 and the top guide plate 30 about the longitudinal center axis of the shaft 52, but is prohibited from moving vertically or axially along the center axis. The shaft 52 has an external thread defined on its exterior. The handle 54 is fixedly connected to the top end of the shaft 52 and can be manipulated by an operator to rotate the shaft 52 in both directions.

[0064] The frame assembly 24 includes a frame base assembly 56, a wire tensioning assembly 58 mounted on the frame base assembly 56 and vertically movable relative to the frame base assembly 56, a right arm assembly 60 pivotally mounted on the wire tensioning assembly 58, a left arm assembly 62 pivotally mounted on the frame base assembly 56, a cover 64 hingedly mounted on the frame base assembly 56, and a cutting member 26. The wire tensioning assembly 58 is adjustable to adjust the amount of tension applied to the cutting member 26, and is adjustable to allow removal and replacement of the cutting member 26.

[0065] like Figure 10-13 As shown, the frame substrate assembly 56 includes a frame substrate 66 having a front surface 66a, a rear surface 66b, a top surface 66c, a bottom surface 66d, and left and right side surfaces 66e, 66f, a drive wheel 68 rotatably mounted on its front surface 66a, and a drive mechanism 70, which is mounted on its rear surface 66b and attached to the drive wheel 68 to operate the drive wheel 68.

[0066] The frame base plate 66 has trunnions 72, 73, 74, 76 and a frame block 78 extending outward from its rear surface 66b. Each trunnion 72, 73, 74, 76 has a passage provided between the top and bottom surfaces thereon, and a bushing is installed in each passage. The drive shaft of the drive mechanism 70 extends through a hole provided through the frame base plate 66. The drive wheel 68 is close to the front surface 66a of the frame base plate 66 and is coupled to the drive mechanism 70 on the rear surface 66b of the frame base plate 66 through the drive shaft. The trunnions 74, 76 are arranged on one side of the drive mechanism 70 and are vertically aligned with each other. The trunnions 72, 73 are arranged on the other side of the drive mechanism 70, vertically aligned with each other, the trunnion 72 is horizontally aligned with the trunnion 74, and the trunnion 73 is horizontally aligned with the trunnion 76. The frame block 78 has a threaded passage 80 therethrough, which extends from the upper surface of the frame block 78 to the lower surface of the frame block 78. The frame base plate 66 also has a left arm retaining block 82 and an arm mounting pin 84 extending outwardly from the front surface 66a. The left arm retaining block 82 is proximate to the bottom surface 66d and proximate to the corner between the bottom surface 66d and the left side surface 66f. The left arm retaining block 82 has first and second spaced apart recesses 86a, 86b disposed in its lower surface.

[0067] In the example shown, the drive mechanism 70 is a hydraulic drive system. Alternatively, the drive mechanism 70 may be a motor, a pneumatic drive mechanism, an electric drive mechanism, or the like.

[0068] like Figure 14-19As shown, the wire tensioning assembly 58 includes a wire tensioning base plate 88 having a front surface 88a and a rear surface 88b, a right arm adjustment mechanism 90 mounted on the front surface 88a of the wire tensioning base plate 88, a tension indicator mechanism 92 mounted on the rear surface 88b of the wire tensioning base plate 88, and a wire tensioning height adjustment mechanism 94 mounted on the rear surface 88b of the wire tensioning base plate 88. The wire tensioning height adjustment mechanism 94 works with a wheel slider 132 extending from the frame base plate 66.

[0069] The wheel slider 132 has a passage therethrough, which extends from an upper surface of the wheel slider 132 to a lower surface of the wheel slider 132 , and a bushing 134 is seated therein.

[0070] A trunnion 96 extends outwardly from the rear surface 88b of the wire tensioning base plate 88. The trunnion 96 has a passage 98 extending between its top and bottom surfaces, and a bushing is mounted therein. A hole 100 extends downwardly from the top surface of the trunnion 96 and is spaced apart from the passage 98, and a threaded feed nut is mounted therein.

[0071] The wire tension height adjustment mechanism 94 includes a threaded rod 102 having a knob 104 at its upper end. The lower end of the rod 102 is threadedly engaged with a feed nut in the hole 100. The rod 102 is rotatable relative to the trunnion 96, and when the rod 102 rotates, the trunnion 96, and thus the wire tensioning base plate 88, translates along the rod 102.

[0072] The right arm adjustment mechanism 90 includes a housing 105 having a piston 106 extending outwardly therefrom and a spring 108 located within the housing 105 to bias the piston 106. The piston 106 includes a shaft 110 having an enlarged piston head 112 at its end. A recess 114a is provided in the lower surface of the housing 105, near the end of the housing 105 from which the piston 106 extends. A recess 114b is provided on the lower surface of the piston head 112.

[0073] The tension indicator mechanism 92 includes a housing 116 extending outwardly from the rear surface 88b of the wire tensioning base plate 88 at a position spaced below the trunnion 96, a passage 118 extending through the housing 116 from the front side 116a of the housing 116 to the rear side 116b thereof, a movable indicator arm 120 located within the passage 118 and pivotally connected to the housing 116 by an arm mounting pin 122, and a rod 124 pivotally attached to the indicator arm 120 by an arm mounting pin 126. In one embodiment, the indicator arm 120 is L-shaped. The rod 124 is fixedly connected to the upper end of the piston head 112 and extends through an elongated horizontal slot 128 through the wire tensioning base plate 88. The housing 116 has markings 130 thereon corresponding to a "SET" position, a "CUT1" position, and a "CUT2" position. The end 120a of the movable indicator arm 120 is visible from above the housing 116 so that an operator can see when the end 120a is aligned with one of the "SET" position, the "CUT1" position, and the "CUT2" position. When the piston 106 moves horizontally as described herein, the movement of the piston head 112 causes the rod 124 to translate along the slot 128, which in turn causes the indicator arm 120 to pivot within the channel 118 of the housing 116. Depending on the position of the piston head 112, the end 120a of the movable indicator arm 120 will be aligned with one of the "SET" position, the "CUT1" position, and the "CUT2" position for reasons described herein.

[0074] like Figure 20-22 As shown, the right arm assembly 60 includes a rear plate 136 and a front plate 138 arranged in parallel. A plurality of spacers 141 are provided between the parallel plates 136, 138 to separate the rear plate 136 from the front plate 138 by a predetermined distance. An inner opening is provided between the inner sides of the plates 136, 138; a bottom opening is provided between the bottom sides of the plates 136, 138; an outer opening is provided between the outer sides of the plates 136, 138, and a top opening is provided between the top sides of the plates 136, 138. An arm mounting pin 140 extends outwardly from the front surface 88a of the wire tensioning base plate 88 and extends through the plates 136, 138 near its top end to attach the right arm assembly 60 vertically upward from the piston head 112 to the frame base plate 66 of the wire tensioning assembly 58. The arm wheel 142 is rotatably mounted between the plates 136, 138 near the bottom ends of the plates 136, 138 via a shaft 144 mounted between the plates 136, 138. The arm mounting pin 140 may be integrally formed with the wire tensioning base plate 88, thereby providing a one-piece component.

[0075] The spring biased latch 146 is pivotally connected to the plates 136, 138 by an arm mounting pin 148 extending between the plates 136, 138. The spring biased latch 146 includes a latch arm 150 and a spring 152. The latch arm 150 has an elongated handle portion 150a, a pivot mounting portion 150b extending outwardly from the handle portion 150a near its upper end, and a finger portion 150c protruding upwardly from the upper end of the handle portion 150a. The finger portion 150c has a curved end surface 154. The spring 152 has a first end 152a engaged with the pivot mounting portion 150b, a coiled portion 152b extending from the first end 152a wrapped around the pin 148, and a second end 152c extending from the coiled portion 152b and engaged with one of the spacers 141. The spring 152 normally biases the latch arm 150 to the first position such that the lower end 156 of the handle portion 150 a of the latch arm 150 is pivoted away from the plates 136 , 138 .

[0076] The finger portion 150c may be located in a recess 114a provided in the piston housing 105, or may be located in a recess 114b provided in the piston head 112. When the finger portion 150c is located in the recess 114a provided in the piston housing 105, the right arm assembly 60 is in the storage position. When the finger portion 150c is located in the recess 114b provided in the piston head 112, the right arm assembly 60 is in the operating position. The recesses 114a, 114b are slightly larger than the finger portion 150c so that the finger portion 150c can be released from the recesses 114a, 114b when the operator pivots the latch arm 150 about its arm mounting pin 148. When latch arm 150 engages notch 114b in piston head 112 in the operative position and piston 106 moves as described herein, notch 114b is sized to allow finger portion 150c to pivot within notch 114b but maintain engagement of finger portion 150c with piston head 112 .

[0077] like Figure 23-25As shown, the left arm assembly 62 includes a rear plate 158 and a front plate 160 arranged in parallel. A plurality of spacers 162 are provided between the parallel plates 158, 160 to separate the rear plate 158 from the front plate 160 by a predetermined distance. An inner opening is provided between the inner sides of the plates 158, 160; a bottom opening is provided between the bottom sides of the plates 158, 160; and an outer opening is provided between the outer sides of the plates 158, 160, and a top opening is provided between the top sides of the plates 158, 160. The arm mounting pin 84 extends outwardly from the frame base plate 66 and extends through the plates 158, 160 near the top end thereof to attach the left arm assembly 62 vertically upward from the left arm holding block 82 to the frame base plate 66 of the frame base plate assembly 56. The arm wheel 164 is rotatably mounted between the plates 158, 160 near the bottom ends thereof by a shaft 166 installed between the plates 158, 160. The arm mounting pin 84 may be integrally formed with the frame base plate 66 , thereby providing a one-piece component.

[0078] The spring biased latch 168 is pivotally attached to the plates 158, 160 by an arm mounting pin 170 extending between the plates 158, 160. The spring biased latch 168 includes a latch arm 172 and a spring 174. The latch arm 172 has an elongated handle portion 172a, a pivot mounting portion 172b extending outwardly from the handle portion 172a near its upper end, and a finger portion 172c protruding upwardly from the upper end of the handle portion 172a. The finger portion 172c has a curved end surface 176. The spring 174 has a first end 174a engaged with the pivot mounting portion 172b, a coiled portion 174b extending from the first end 174a wrapped around the pin 170, and a second end 174c extending from the coiled portion 174b and engaged with one of the spacers 162. The spring 174 normally biases the latch arm 172 to the first position such that the lower end 178 of the handle portion 172 a of the latch arm 172 is pivoted away from the plates 158 , 160 .

[0079] The finger portion 172c may be disposed in either the notch 86a or the notch 86b in the left arm retaining block 82. When the finger portion 172c is located in the notch 86a, the left arm assembly 62 is in the storage position. When the finger portion 172c is located in the notch 86b, the left arm assembly 62 is in the operating position. The notches 86a, 86b are slightly larger than the finger portion 172c so that the finger portion 172c can be released from the notches 86a, 86b when the operator pivots the latch arm 172 about its arm mounting pin 170.

[0080] In the illustrated example, each arm wheel 142, 164 includes a central hub 180 and an outer body member 182. Each arm wheel 142, 164 defines a pair of spaced apart flanges and a recess between the flanges for receiving the cutting member 26 therein. In one example, the arm wheels 142, 164 are formed of plastic having a cast urethane wear surface to provide the arm wheels 142, 164 with sufficient strength and durability to withstand the stresses achieved during operation of the cutting device 20.

[0081] The cutting member 26 forms a loop around the drive wheel 168 and the arm wheels 142, 164. The cutting member 26 is connected to the drive wheel 68 and partially surrounds the drive wheel 68, the cutting member 26 is connected to the arm wheel 142 of the right arm assembly 60 and partially surrounds the arm wheel 142, and the cutting member 26 is connected to the arm wheel 164 of the left arm assembly 62 and partially surrounds the arm wheel 164.

[0082] The guide shaft 34 of the delivery tower assembly 22 extends through the trunnions 74, 76 extending from the frame base plate 66 of the frame base plate assembly 56. The guide shaft 32 of the delivery tower assembly 22 extends through the trunnions 72, 73 on the frame base plate 66 of the frame base plate assembly 56 and through the passage 98 of the trunnion 96 extending from the wire tensioning base plate 88 of the wire tensioning assembly 58. The shaft 52 of the delivery tower assembly 22 extends through and threadedly engages with the passage 80 of the frame block 78 extending from the frame base plate 66 of the frame base plate assembly 56. The rod 102 of the wire tensioning height adjustment mechanism 94 of the wire tensioning assembly 58 extends through the top guide plate 30 of the delivery tower assembly 22, and the knob 104 is located above the top guide plate 30. The rod 102 of the wire tensioning assembly 58 also extends through the bushing 134 in the passage of the wheel slider 132 of the base assembly 24 and captively engages with the bushing 134. This couples the delivery tower assembly 22, the frame base assembly 56, and the wire tensioning assembly 58 together.

[0083] To initially adjust the tension on the cutting member 26, the arm assemblies 60, 62 are moved to the operating position by pivoting the latches 150, 172 to engage the finger portions 150c, 172c into the notches 114b, 86b, and the delivery tower assembly 22 is mounted to the object using the coupling assembly 38. The wrap member 46 is decoupled from the connector 44, the cutting device 20 is positioned on top of the object so that the saddle plate 50 engages the object, the wrap member 46 is wrapped around the object, the wrap member 46 is again coupled to the connector 44, and the handle 42 is rotated in a direction that causes the connector 44 to translate toward the handle 42, thereby tightening the wrap member 46 around the object. The handle 42 is rotated until the desired amount of tension and force is applied to the object to ensure a secure coupling of the cutting device 20 to the tube. The wrap member 46 will engage and extend from the arcuate engagement surface 48 at a location that depends on the size or diameter of the tube.

[0084] The cutting member 26 will engage the upper surface of the object to be cut. Thereafter, the knob 104 is rotated to rotate the rod 102 of the wire tensioning height adjustment mechanism 94 relative to the top guide plate 30 of the delivery tower assembly 22 and relative to the wheel slider 132. This causes the wire tensioning base plate 88 to move relative to the frame base plate 66, thereby causing the right arm assembly 60 to move upward or downward depending on the direction in which the knob 104 is rotated. As a result, the right arm assembly 60 moves relative to the drive wheel 68, relative to the left arm assembly 62, and relative to the object. The ear shaft 98 slides along the guide shaft 32 during this movement. When the right arm assembly 60 moves downward, the cutting member 26 is pressed against the object. When this movement occurs, the right arm assembly 60 pivots about its arm mounting pin 140 and rotates inwardly against the action of the spring biasing piston 106 (to the extent that the spring force of the spring biasing piston 106 allows such movement). As the piston head 112 moves toward the left arm assembly 62, the spring 108 within the piston housing 105 compresses, and the rod 124 translates along the slot 128, which in turn causes the indicator arm 120 to pivot within the channel 118 of the housing 116. The rotation of the knob 104 and the rod 102 continues until the indicator arm 120 is aligned with the "SET" position. The upward movement of the right arm assembly 60 reduces the tension on the cutting member 26. The downward movement of the right arm assembly 60 increases the tension on the cutting member 26. When in the "SET" position, the cutting member 26 "bends" around the object. By having a bend in the cutting member 26, if the cutting member 26 is too tight and extends straight or substantially straight between the arm wheels 142, 164, more surface area of ​​the cutting member 26 engages the object, rather than just a small surface area engaging the object. A larger surface area engagement between the cutting member 26 and the object facilitates more efficient cutting of the object.

[0085] Once the cutting assembly 20 is in the "SET" position mounted to the object, the object is ready to be cut. To make the cut, the operator turns the delivery handle 54 of the frame height adjustment mechanism 40 to move the frame base assembly 56, the wire tensioning assembly 58, the arm assemblies 60, 62 and the cutting member 26 downwardly toward the object and relative to the delivery tower assembly 22. As the frame base assembly 56, the wire tensioning assembly 58, the two arm assemblies 60, 62 and the cutting member 26 move downward, the cutting member 26 presses against the object. As this movement occurs, the right arm assembly 60 pivots about its arm mounting pin 140 and rotates inwardly. The piston head 112 moves inwardly from the piston housing 105 under the force from the spring 108. As the piston head 112 moves inwardly, the rod 124 translates along the slot 128, which in turn causes the indicator arm 120 to pivot to the desired "CUT1" position or "CUT2" position within the channel 118 of the housing 116. The operator maintains a rotational speed on the delivery handle 54, which maintains the indicator arm 120 in the desired "CUT1" position or "CUT2" position. The cutting member 26 will then cut through the object. This represents a balance and dynamic tension between the "let out" or slack in the cutting member 26 and the pressure applied on the cutting member 26 during cutting. During operation, the dynamic motion adjusts the tension in the cutting member 26. For a given amount of slack, the operator maintains a certain wire pressure for optimal cutting.

[0086] When the cutting device 20 is not engaged with an object, the cutting member 26 can be released from the drive wheel 68 and the arm wheels 142, 164 for replacement. For example, if the cutting member 26 is worn, damaged, or a different type of cutting member 26 is required based on the type of object to be cut, it may be necessary to remove and replace the cutting member 26. The cutting member 26 can be removed from the cutting device 20 when the cutting device 20 is in the storage position or the operating position (i.e., the two arm assemblies 60, 62 are inward or outward). In order to replace the cutting member 26, the wire tensioning assembly 58 is used to lift the right arm wheel 142 upward toward the drive wheel 68. This reduces or releases the tension applied to the cutting member 26, and the cutting member 26 can be removed from all wheels 68, 142, 164. Another cutting member 26 can replace the previous cutting member 26. The new cutting member 26 is wrapped around the drive wheel 68 and the arm wheels 142, 164. The wire tensioning assembly 58 is used to lower the arm wheel 142 away from the drive wheel 68 in a second direction opposite to the first direction, thereby increasing or applying tension to the cutting member 26 .

[0087] The guard 186 may extend outwardly from the front surface 88 a of the wire tensioning base 66 proximate the upper end of the right arm assembly 60 .

[0088] The cover 64 can be selectively opened to access the drive wheel 68, and can be closed to prevent access and protect the drive wheel 68. The cover 64 is coupled to the frame base plate 66 by a plurality of pins 188, hinges 190, and latches 192.

[0089] The cover 64 has a front wall 194a having a front surface and a rear surface, a top wall 194b depending from a top end of the front wall 194, and side walls 194c depending from opposite sides of the front wall 194a. A plurality of openings 196 are provided through the cover 64.

[0090] like Fig.26 and 27 As shown, each pin 188 has an elongated shaft 198 extending outward from the front surface 66a of the frame base plate 66, a flange 200 extending radially outward from the shaft 198, and an enlarged head 202 at the end of the shaft 198 and spaced from the flange 200. A recess 203 is provided between the head 202 and the flange 200. Each opening 196 is larger than the head 202 of the corresponding pin 188, but smaller than the flange 200.

[0091] like Fig.28 As shown, hinge 190 has a cylindrical knuckle 204 coupled to frame base 66 and a cylindrical piece 206 coupled to side wall 194d of cover 64. The pieces 206 are connected together by rod 208. Pins 210 extend through the corresponding knuckle / piece 204 / 206.

[0092] The latch 192 has a first part on the top wall 192b of the cover 64 and a second mating part on the top surface of the frame base plate 66. When the above parts of the latch 192 are engaged with each other, the cover 64 cannot be opened.

[0093] When the cover 64 is in the closed position, the top wall 194b of the cover 64 overlaps the top surface of the frame base plate 66, the side walls 194c, 194d of the cover 64 overlap the sides of the frame base plate 66, and the bottom edge of the front wall 192a is aligned with or below the bottom edge of the frame base plate 66. The pins 188 are located at the top of the openings 196, the heads 202 of the pins 188 extend through the corresponding openings 196, and the front wall 196a is located in the recess 203 of each pin 188. Each tab 206 is adjacent to a corresponding joint 204. The front wall 194a of the cover 64 covers the drive wheel 68, the frame base plate assembly 56, the wire tensioning assembly 58 and the upper portion of each arm assembly 60, 62. The side walls 194c, 194d cover the sides of the drive wheel 68.

[0094] To open the cover 64, the above-mentioned components of the latch 192 are disengaged. Thereafter, the operator lifts the cover 64 upward. The tab 206 travels upward along the pin 210. Once the front wall 194a of the cover 64 is no longer located in the groove 203, the cover 64 is rotated around the pin 210 to move the cover 64 to the open position.

[0095] To close the cover 64 again, the cover 64 is rotated about the pin 210 until the rear surface of the front wall 194a of the cover 64 engages with the head 202 of the pin 188. The head 202 of the pin 188 is conical, so the cover 64 will slide along the head 202 to move upward relative to the pin 188 and the frame base plate 66. Once the cover 64 moves past the head 202, the cover 64 will fall into the groove 203. Thereafter, the latch 192 reengages.

[0096] As will be apparent after reviewing the present disclosure as a whole, the cutting device 20 can be set up, operated, and configured to its storage position without the use of tools, which eliminates the need to carry or keep track of tools.

[0097] The orientation and configuration of all wheels 68, 142, 164 of the cutting device 20 enable the cutting device 20 to include a relatively long length of the cutting member 26. In one example, the cutting member 26 can have a length of about 105 inches. In one example, the cutting member 26 can have a length between about 95 inches and about 120 inches. In one example, the amount of the cutting member 26 wrapped around each wheel 68, 142, 164 can be specifically designed to inhibit the sliding between the cutting member 26 and the wheel 68, 142, 164 during operation and to provide sufficient support for the cutting member 26. In addition, in the example shown, all wheels 68, 142, 164 are aligned and centered in a common plane, which inhibits drift and pitching of the wheels 68, 142, 164 during operation of the cutting device 20.

[0098] With the cutting device 20 in its storage position, the cutting device 20 is compact and can be transported, for example by carrying, to various environments to which conventional cutting devices could not previously be transported. For example, the cutting device 20 can easily pass through a manhole opening in the ground to work on an underground pipe. Conventional cutting devices may be too large to pass through a manhole. Once the cutting device 20 is in or near the desired cutting position, the cutting device 20 can first be coupled to an object or first moved from its storage position to its operating position. For the purpose of this exemplary operational description, the object is described as a pipe. However, the cutting device 20 is suitable for cutting a variety of objects, and the description of the pipe here is not intended to limit the present disclosure.

[0099] The examples of operation of the cutting device 20 described herein are merely some of the many different ways to operate the cutting device 20 and are not intended to limit the present invention.

[0100] When in the operating position, the engagement of the latch 150, 172 with the piston head 112 and the left arm retaining block 82 provides structural support for the arm assembly 60, 62 when under load, and also provides structural rigidity of the arm assembly 60, 62 when under load. When the cutting member 26 is tightened and under load, the arm assembly 60, 62 is loaded between the upper arm mounting pin 140, 84 and the arm wheel 142, 164. The entire load is supported by the arm assembly 60, 62. In order to increase rigidity and structural integrity and prevent the arm assembly 60, 62 from bending when under load, the latch 150, 172 engages with the piston head 112 and the left arm retaining block 82 at approximately the midpoint of each arm assembly 60, 62, and preferably can be positioned slightly toward the upper arm mounting pin 140, 84. This stabilizes the arm wheel 142, 164. Because the arm assemblies 60, 62 are not supported in a cantilevered manner, all forces acting due to tension in the cutting member 26 act in a single plane, i.e., the plane of the cutting member 26, the drive wheel 68, and the arm wheels 142, 164. Due to the relatively tight friction fit between the latches 150, 172 and the piston head 112 and the left arm retaining block 82, lateral deflection of the arm assemblies 60, 62 is prevented.

[0101] The number of components disposed on the front surface 66a of the frame base plate 66 and the front surface 88a of the wire tensioning base plate 88 is minimized because it is this area that may be subject to debris accumulation during the cutting operation. There are no sensors, springs, or sensitive elements in this area specifically used to isolate these elements from any such debris. The cover 64 and the frame base plate 66 substantially isolate the sensitive components disposed on the rear surface 66b of the frame base plate 66 from the debris area associated with the front surface 66a of the frame base plate 66 because a minimal path is provided between them. Because the arm wheels 142, 164 create a fanning action when rotating to sweep debris away from the center of the wheel. Therefore, the components on the rear surface 66b of the frame base plate 66 remain isolated and protected from debris.

[0102] In one embodiment, each arm assembly 60, 62 includes a lower latchable door 250 that closes the bottom opening between the panels 136, 138, 158, 160, and an upper latchable door 252 that closes the outside opening between the panels 136, 138, 158, 160. The door 250 is shaped to conform to the shape of the bottom opening between the panels 136, 138, 158, 160 and is pivotally attached to the panels 136, 138, 158, 160 by an arm mounting pin 254. The door 252 is shaped to conform to the outside opening between the panels 136, 138, 158, 160 and is hingedly attached to the panels 136, 158 by a hinge 256. A latch member 258 is connected to the other panel 138, 160 and cooperates with a latch member 260 on the upper door 252.

[0103] In the closed position, the upper end of the lower door 250 engages the lower end of the upper door 252 such that the upper end of the lower door 250 is located inside the lower end of the upper door 252. The latch components 258, 260 engage to hold the two doors 250, 252 in the closed position.

[0104] To open the doors, the latch components 258, 260 are disengaged and the upper door 252 is rotated about its hinges 256, thereby exposing the exterior opening. Once the upper door 252 is open, the lower door 250 is free to rotate about its arm mounting pins 254 by gravity, thereby exposing the bottom opening. When the doors 250, 252 are in the open position, the interior of the arm assembly 60, 62 including the arm wheels 142, 164 can be easily cleaned to remove debris that may have accumulated during the cutting process.

[0105] The housing 262 surrounding the arm mounting pin 254 of the lower door 250 may be hardened so that if the cutting member 26 is severed, the arm mounting pin 254 will resist damage.

[0106] In addition, when the lockable doors 250, 252 are in the open position, replacing the cutting member 26 is quick and easy, and no tools are required. Note that the latching doors 250, 252 only provide access to the interior partially enclosed space between the plates 136, 138, 158, 160, and are not required to provide structural support or structural integrity for the arm assemblies 60, 62.

[0107] Although two lockable doors 250, 252 are provided, it should be understood that a single door may be provided, or more than two doors may be provided.

[0108] Now refer to Figure 29-42 , the cutting device 20 includes a liquid dispensing assembly 264, which is suitable for dispensing pressurized liquid to help cool portions of the cutting device 20 during operation. When the cutting device 20 is used to cut an object, a large amount of heat is generated. Excessive heat may undesirably damage the cutting member 26 and / or components of the cutting device 20. Therefore, the liquid dispensing assembly 264 helps to inhibit overheating during operation. The liquid dispensing assembly 264 also reduces the amount of debris that moves upward into the cutting device 20 during operation of the cutting device 20. The liquid dispensed from the liquid dispensing assembly 264 engages the debris, captures the debris and falls or flows downward, causing the debris to fall with it. Excessive debris accumulated in the cutting device 20 may adversely affect the operation of the cutting device and / or damage the cutting device 20. In one example, the liquid is water.

[0109] The liquid dispensing assembly 264 includes right and left dispensers or sprayers 266, 268 and right and left conduits 270, 272 for communicating pressurized liquid to the dispensers 266, 268, see Fig.30 The distributor 266 is connected to the inner surface of the plate 136 of the right arm assembly 60, and the conduit 270 is connected to the distributor 266; the distributor 268 is connected to the inner surface of the plate 158 of the left arm assembly 62, and the conduit 272 is connected to the distributor 268. The conduits 270, 272 convey the liquid to the corresponding distributors 266, 268. Each conduit 270, 272 may be rigid.

[0110] The liquid distribution assembly 264 also includes a right liquid passage block 274 , a left liquid passage block 276 , a flexible conduit 278 extending between the right and left liquid passage blocks 274 , 276 , a right mounting pin housing 280 , and a left mounting pin housing 282 .

[0111] The right liquid passage block 274 extends from the rear surface 88b of the wire tensioning base plate 88. The right liquid passage block 274 may be integrally formed with the wire tensioning base plate 88, thereby providing a one-piece component. Fig.32 and 33 As shown, the right liquid passage block 274 has a passage 284 therethrough, which extends from its rear to its front. The passage 284 has a rear end 284a at the rear of the right liquid passage block 274 and a front end 284b at the front of the right liquid passage block 274, the rear end 284a being connected to the flexible conduit 178, and the front end 284b communicating with a hole (not shown) through the wire tensioning substrate 88. The right liquid passage block 274 may take the form of a trunnion and have a support rod 32 extending therethrough and may further have a support rod 286 extending therethrough; the support rod 286 is fixed to the frame substrate 66.

[0112] The left liquid passage block 276 extends from the rear surface 66b of the frame substrate 66. The left liquid passage block 276 may be integrally formed with the frame substrate 66, thereby providing a one-piece component. Fig.34 and 35As shown, the left liquid passage block 276 has a passage 288 therethrough, the passage 288 having a first branch 290 extending from the rear of the left liquid passage block 276 to the front of the left liquid passage block 276 and a second branch 292 extending from the first branch 290 to the rear of the left liquid passage block 276. The first branch 290 has a rear end 290a at the rear of the left liquid passage block 276 and a front end 290b at the front of the left liquid passage block 276, the rear end 290a being connected to a pressurized liquid source (not shown), and the front end 290b being in fluid communication with a hole (not shown) passing through the frame substrate 66. The second branch 292 has a rear end 292a at the rear of the left liquid passage block 276 and a front end 292b, the rear end 292a being connected to the flexible conduit 278, and the front end 292b being in fluid communication with the first branch 290.

[0113] The right mounting pin housing 280 is located between the plates 136, 138 of the right arm assembly 60, and the left mounting pin housing 282 is located between the plates 158, 160 of the left arm assembly 62. Each mounting pin housing 280, 282 is formed identically. Figure 36-38 As shown, each mounting pin housing 280, 282 has a passage 294 extending axially from the rear end of the mounting pin housing 280, 282 to the front end of the mounting pin housing 280, 282, and a passage 296 intersecting the passage 294 and extending radially outward from the passage 294 to the outside of the mounting pin housing 280, 282. In the right mounting pin housing 280, the guide tube 270 is attached to the end 296a of the passage 296. In the left mounting pin housing 282, the guide tube 272 is attached to the end 296a of the passage 296.

[0114] The arm mounting pins 84, 140 form part of the liquid dispensing assembly 264. Each arm mounting pin 84, 140 is identically formed. Figure 39-41 As shown, each arm mounting pin 84, 140 has a body 298 having a rear end 298a, a front end 298b and an outer surface 298c, and a passage through the body 298 formed by a hole 300 extending axially from an opening 302 at the rear end 298a toward the front end 298b, and a through hole 304 extending diametrically through the arm mounting pin 84, 140 and intersecting the hole 300 and terminating at the outer surface 298c of the arm mounting pin 84, 140. The hole 300 is a blind hole such that the hole 300 does not extend to the front end 298b of the arm mounting pin 84, 140.

[0115] like Fig.42As shown, each arm mounting pin 84, 140 has a pair of spaced apart bushings 306, 308 mounted thereon that surround the body 298. For the right arm mounting pin 140, the plates 136, 138 are attached to the corresponding bushings 306, 308, which allow the plates 136, 138 to rotate relative to the right arm mounting pin 140. The right arm mounting pin 140 extends through the plates 136, 138 and through the channel 294 of the right mounting pin housing 280, such that the right mounting pin housing 280 is located between the plates 136, 138. For the left arm mounting pin 84, the plates 158, 160 are attached to the corresponding bushings 306, 308, which allow the plates 158, 160 to rotate relative to the left arm mounting pin 84. The left arm mounting pin 84 extends through the plates 158 , 160 and through the passage 294 of the left mounting pin housing 282 such that the left mounting pin housing 282 is located between the plates 158 , 160 .

[0116] The O-rings 310, 312 seal the mounting pin housings 280, 282 to the arm mounting pins 84, 140 such that a cavity 314 is provided between the right mounting pin housing 280 and the right arm mounting pin 140 and between the left mounting pin housing 282 and the left arm mounting pin 84. The cavity 314 is in fluid communication with the bore 300 and the through-hole 304, the passages 294, 296 in the right mounting pin housing 280, and the through-holes in the arm mounting pin 140. In one embodiment, the O-rings 310, 312 are eliminated and the mounting pin housings 280, 282 and the corresponding arm mounting pins 84, 140 are integrally formed with one another, thereby providing a one-piece component.

[0117] In use, liquid flows from the source through the first branch 290 of the left liquid passage block 276 and through the second branch 292 thereof. Liquid in the first branch 290 flows through the opening 302 in the left arm mounting pin 84, the hole 300 of the left arm mounting pin 84, and then through the through hole 304 of the left arm mounting pin 84. The liquid then flows into the cavity 314 between the left arm mounting pin 84 and the left mounting pin housing 282. The liquid flows through the channel 296 of the left mounting pin housing 282 and then flows into the left conduit 272 to the left distributor 268 in the left arm assembly 62. The liquid flows out of the left distributor 268 and flows onto the left arm wheel 164. Liquid also flows from the second branch 292, through the flexible conduit 178 and into and through the channel 284 in the right liquid passage block 274. The liquid then flows through the opening 302 in the right arm mounting pin 140, through the hole 300 of the right arm mounting pin 140, and then through the through hole 304 of the right arm mounting pin 140. The liquid then flows into the cavity 314 between the right arm mounting pin 140 and the right mounting pin housing 280. The liquid flows through the channel 296 of the right mounting pin housing 280, and then flows into the right conduit 270 to the right distributor 266 in the right arm assembly 62. The liquid flows out of the right distributor 266 and flows onto the right arm wheel 142. The flexible conduit 278 allows movement between the operating position and the storage position of the arm assembly 60, 62, as described above. If the conduit 278 is completely rigid, the conduit 278 may break or break due to the movement of the arm member 120.

[0118] The two distributors 266, 268 distribute liquid to the cutting member 26 and the adjacent arm wheels 142, 164 at or near the position where the cutting member 26 engages the wheels 142, 164. Each of the distributors 266, 268 includes a liquid discharge hole and a deflector for deflecting the discharged liquid at a desired angle. The deflector is tilted to deflect the liquid at or near the point where the cutting member 26 engages the wheels 142, 164.

[0119] The pressurized liquid spray cools the cutting member 26 and removes debris during operation. Most of the components of the cutting device 20 are located on the rear surface 66b of the frame base plate 66 so as not to obstruct cleaning of debris or capture any debris. To clean any accumulated debris and prepare the cutting device 20 for storage, the operator need only open the cover 64 and lockable doors 250, 252 and spray the area with a liquid source from an external hose.

[0120] The positions of the right and left liquid passage blocks 274, 276 may be reversed.

[0121] It should be understood that when an element or component, its variant or its equivalent is, for example, coupled, fixed, attached, mounted, connected to another element or component or coupled, fixed, attached, mounted, connected with another element or component or its variant or its equivalent, such element or component can be formed as a whole as a single piece or formed separately.

[0122] It should also be understood that the use of any orientation or directional terms herein, such as "top," "bottom," "front," "rear," "back," "left," "right," "side," and the like, is not intended to imply only a single orientation of the items associated therewith or to limit the disclosure in any way. The use of such orientation or directional terms is intended to aid in understanding the principles disclosed herein and corresponds to the exemplary orientations shown in the accompanying drawings. For example, the cutting device can be used in any orientation, and the use of these terms is intended to correspond to the exemplary orientations of the cutting device shown in the accompanying drawings. The use of these terms in association with the cutting device is not intended to limit the cutting device to a single orientation or to limit the cutting device in any way.

[0123] An abstract of the present disclosure is provided to allow the reader to quickly determine the nature of the technical disclosure. It should be understood that the content submitted is not used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing detailed description, it can be seen that in order to simplify the present disclosure, various features are combined in various embodiments. The method of the present disclosure should not be interpreted as reflecting the intention that the claimed embodiments require more features than the features explicitly recited in each claim. On the contrary, the subject matter of the invention lies in less than all the features of a single disclosed embodiment.

[0124] Although various embodiments of the present invention have been described, it will be appreciated by those skilled in the art that other embodiments and implementations are possible within the scope of the present invention.Accordingly, the present disclosure is not to be limited except in light of the following claims and their equivalents.

Claims

1. A cutting device, comprising: a delivery tower assembly including a guide plate and a saddle connected to the guide plate, the saddle being configured to be attached to an object to be cut; A frame base plate and a driven driving wheel mounted on the frame base plate; a first arm assembly, the first arm assembly comprising a first arm plate pivotably coupled to the frame base plate, the first arm plate having an arm wheel rotatably mounted on the first arm plate, the first arm assembly being pivotable relative to the saddle; a second arm plate, the second arm plate being pivotally mounted on the frame base plate, the second arm plate having a second arm wheel rotatably mounted on the second arm plate; a rod attached to the guide plate, the rod rotatable relative to the guide plate, and the rod attached to the frame base plate, wherein rotation of the rod causes upward and downward translation of the frame base plate, the first arm assembly, and the second arm wheel relative to the saddle; a cutting member partially wrapped around the first arm wheel, the second arm wheel and the drive wheel; as well as A tensioning assembly operably connected to the frame base and the first arm assembly and configured to visually indicate an amount of tension applied to the cutting member, the tensioning assembly comprising a housing having an indicator arm movably mounted in the housing and operably connected to the first arm assembly, wherein pivotal movement of the first arm assembly causes movement of the indicator within the housing.

2. The cutting device of claim 1, further comprising markings on the housing indicating a plurality of operating states.

3. The cutting device of claim 1, further comprising a spring loaded piston coupled to the frame base plate and to the first arm assembly and the indicator.

4. The cutting device according to claim 1 further comprises a wire tensioning base plate and a wire tensioning height adjustment mechanism, wherein the wire tensioning height adjustment mechanism is connected to the frame base plate and to the wire tensioning base plate, and the wire tensioning height adjustment mechanism is configured to move the wire tensioning base plate upward and downward relative to the frame base plate, wherein the first arm assembly is pivotally mounted on the wire tensioning base plate.

5. A cutting device comprising: a delivery tower assembly including a guide plate and a saddle connected to the guide plate, the saddle being configured to be attached to an object to be cut; A frame base plate and a driven driving wheel mounted on the frame base plate; a first arm assembly, the first arm assembly comprising a first arm plate pivotably coupled to the frame base plate, the first arm plate having an arm wheel rotatably mounted on the first arm plate, the first arm assembly being pivotable relative to the saddle; a second arm plate, the second arm plate being pivotally mounted on the frame base plate, the second arm plate having a second arm wheel rotatably mounted on the second arm plate; a rod attached to the guide plate, the rod rotatable relative to the guide plate, and the rod attached to the frame base plate, wherein rotation of the rod causes upward and downward translation of the frame base plate, the first arm assembly, and the second arm wheel relative to the saddle; a cutting member partially wrapped around the first arm wheel, the second arm wheel and the drive wheel; a tensioning assembly operably connected to the frame base plate and the first arm assembly and configured to visually indicate an amount of tension applied to the cutting member; a wire tensioning base plate and a wire tensioning height adjustment mechanism coupled to the frame base plate and to the wire tensioning base plate and configured to move the wire tensioning base plate upward and downward relative to the frame base plate, wherein the first arm assembly is pivotally mounted on the wire tensioning base plate; as well as A latch is attached to the first arm assembly and is configured to be attached to the wire tensioning base plate.

6. A cutting device comprising: a delivery tower assembly including a guide plate and a saddle connected to the guide plate, the saddle being configured to be attached to an object to be cut; A frame base plate and a driven driving wheel mounted on the frame base plate; a first arm assembly, the first arm assembly comprising a first arm plate pivotably coupled to the frame base plate, the first arm plate having an arm wheel rotatably mounted on the first arm plate, the first arm assembly being pivotable relative to the saddle; a second arm plate, the second arm plate being pivotally mounted on the frame base plate, the second arm plate having a second arm wheel rotatably mounted on the second arm plate; a rod attached to the guide plate, the rod rotatable relative to the guide plate, and the rod attached to the frame base plate, wherein rotation of the rod causes upward and downward translation of the frame base plate, the first arm assembly, and the second arm wheel relative to the saddle; a cutting member partially wrapped around the first arm wheel, the second arm wheel and the drive wheel; a tensioning assembly operably connected to the frame base plate and the first arm assembly and configured to visually indicate an amount of tension applied to the cutting member; A wire tensioning base plate and a wire tensioning height adjustment mechanism, wherein the wire tensioning height adjustment mechanism is connected to the frame base plate and to the wire tensioning base plate, and the wire tensioning height adjustment mechanism is configured to move the wire tensioning base plate upward and downward relative to the frame base plate, wherein the first arm assembly is pivotally mounted on the wire tensioning base plate, and the wire tensioning height adjustment mechanism includes a block extending from the frame base plate, and a rod engaged with the block and engaged with the wire tensioning base plate, wherein rotation of the rod causes vertical movement of the wire tensioning base plate and the first arm assembly relative to the frame base plate and the delivery tower assembly.

7. The cutting device according to claim 6, wherein: The frame substrate has a front surface and a rear surface, the driving wheel is mounted on the front surface of the frame substrate and the block extends from the rear surface of the frame substrate.

Images