|Publication number||USRE33233 E|
|Application number||US 07/351,596|
|Publication date||Jun 12, 1990|
|Filing date||May 15, 1989|
|Priority date||May 19, 1986|
|Publication number||07351596, 351596, US RE33233 E, US RE33233E, US-E-RE33233, USRE33233 E, USRE33233E|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (6), Classifications (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention is in the field of machines for processing trees into firewood. A number of machines have been provided to cut down trees and to remove limbs from the trees. Additional machines have been provided to cut timber into individual logs. Log splitters are also available to divide or split logs into smaller pieces. A major disadvantage of many of the prior machines is the requirement that the machines be manned by several persons. Further, many of the machines are difficult to move into forests which typically are quite congested with fallen trees, stumps, bushes, etc. Many fallen trees are located in ravines or other inaccessible areas increasing the difficulty of processing the fallen tree into split lumber. Disclosed herein is a tree processing machine which is readily moved into a forest and is operable by a single person in such a manner that the fallen tree is completely processed into split logs. Means are provided to pull fallen trees located in inaccessible locations to the tree processing machine.
An example of a machine for cutting portions off of a standing tree by means of an extendable arm is shown in U.S. Pat. No. 3,529,640, issued to Kamner. Another approach is to sever the base of the tree which is then placed in a wagon such as shown in U.S. Pat. No. 4,455,522, issued to Hyde, et al. A device for cutting down a tree and then moving along the length thereof to sever the branches of the fallen tree is shown in U.S. Pat. No. 3,340,912, issued to Williams, et al. Both the Williams, et al. patent and the aforementioned Hyde, et al. patent may be moved into a wooded area to harvest trees. Various devices have been provided for grasping lumber which is then processed such as shown in the U.S. Pat. Nos. 4,116,249, issued to Hogberg, et al., 4,273,168, issued to Probst, and 4,434,827, issued to Franklin.
Another disadvantage of the prior art devices is the relatively short device life due to the pounding and forces exerted on the device by the various moving components. The present device includes a ram for splitting the logs into smaller pieces. The ram is and cutting edges are mounted on a secondary frame which is mounted upon the main frame to isolate the ramming forces from the main frame. In addition, the cutting edges are arranged to intersect centrally with respect to the log and are positioned to not initially simultaneously engage the log thereby minimizing the amount of ramming force needed to split the log.
One embodiment of the present invention is a machine for processing fallen trees into split logs comprising frame means including wheels mounted thereto and further including a main frame supported by the wheels upon ground allowing the frame to be moved into a forest, a chute mounted on the frame and including an entrance to receive a fallen tree, pulling means mounted to the frame and operable to removably attach to the fallen tree and pull same through the entrance and into the chute, saw means movably mounted to the frame and operable to cut off a portion of the fallen tree positioned in the chute, a ramp on the frame positioned adjacent the chute to direct the cut-off portion away from the chute, and, splitting means mounted on the frame and operable to receive the cut-off portion from the ramp and split the cut-off portion into split logs.
Another embodiment of the present invention is a machine for processing fallen trees located remotely therefrom into split logs comprising a mobile main frame allowing the frame to be moved into a forest, chute means on the frame to receive a fallen tree, a wench mounted to the frame including a cable to removably attach to the fallen tree located remotely from the machine and pull the tree into the chute means, saw means movably mounted to the frame and operable to cut off a portion of the fallen tree positioned in the chute means, and, splitting means mounted on the frame and operable to receive the cut off portion and split the cut-off portion into split logs.
It is an object of the present invention to provide a mobile machine for processing fallen trees into split logs.
A further object of the present invention is to provide a machine which may be moved into a wooded area having means thereon for pulling fallen trees out of ravines and then processing the same into split logs.
In addition, it is an object of the present invention to provide a machine for processing fallen trees into split lumber which requires only one person to operate.
Related objects and advantages of the present invention will be apparent from the following description.
FIG. 1 is a side view of the machine for processing fallen trees incorporating the present invention.
FIG. 2 is a top view of the machine of FIG. 1.
FIG. 3 is a right hand end view of the machine of FIG. 1.
FIG. 4 is an enlarged cross-sectional view taken along the line 4--4 of FIG. 1 and viewed in the direction of the arrows.
FIG. 5 is an enlarged cross-sectional view taken along the line 5--5 of FIG. 1 and viewed in the direction of the arrows.
FIG. 6 is an enlarged fragmentary cross-sectional view taken along the line 6--6 of FIG. 3 and viewed in the direction of the arrows.
FIG. 7 is a enlarged fragmentary cross-sectional view taken along the line 7--7 of FIG. 2 and viewed in the direction of the arrows.
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
Referring now more particularly to FIG. 1, there is shown a mobile machine 10 for processing fallen trees into split logs. Machine 10 includes a conventional main frame 11 having a plurality of wheels 12 rotatably mounted thereto and a trailer hitch 13 attached to one end of the main frame for pulling or moving machine 10 into a wooded area. Fixedly mounted atop frame 11 is a pair of vertically mounted side walls 14 and 15 (FIG. 3) which form a chute 16 to receive the fallen tree 23. A wench 17 (FIG. 2) is provided having a spool 18 rotatably mounted atop frame 11 and includes a cable 19 wound thereon. The free end of cable 19 is extended through chute 16 and attached to the fallen tree with the wench then being activated to rewind the cable and pull the fallen tree through the entrance 20 of the chute. The bottom wall 21 of chute 16 has a concave center portion 22 nestably receiving the fallen tree 23. A tail gate 24 is pivotally mounted by conventional hinge 25 to frame 11 and is moveable from an upward, closed position extending across entrance 20 to a downward, open position beneath the entrance as shown in FIG. 3 to provide a guide for the tree being pulled into the chute. A cable 26 or other conventional fastening means is provided on gate 24 to allow the gate to be locked in the upward position. Bottom wall 21 of the chute is inclined extending slightly upwardly from gate 24 to the exit opening 27 of the chute.
A hydraulically operated saw 28 is pivotally mounted to frame 11 immediately adjacent the exit opening 27 of the chute. As wench 17 pulls the fallen tree partially through exit opening 27 of the chute, saw 28 may be pivoted downward thereby engaging and severing a portion 29 of the tree. A ramp 30 is mounted atop frame 11 immediately adjacent saw 28 to support the cut-off portion 29 of the tree.
A holding member 31 (FIG. 7) is provided to releasably engage and hold fallen tree 23 while saw 28 severs the cut-off portion 29 from the tree. The holding means includes a plate 32 with a bottom serrated edge 33 pivotally mounted to block 34 affixed to frame 11. A spring 35 normally urges the member 32 downwardly to engage and hold fallen tree 23, but is releasable to allow the member to be manually pulled upward when the wench pulls the tree further through the chute.
Once the cut-off portion has been severed from the fallen tree, it is moved to a splitting means which is operable to receive the cut-off portion from ramp 30 and split the cut-off portion into split logs. The splitting means is mounted on a second frame and includes a hydraulically driven ram which forces the cut-off portion of the fallen tree past a pair of cutting edges thereby splitting the cut-off portion into split logs. The secondary frame isolates the horizontal compression force generated by the hydraulic ram from the main frame 11 thereby providing for a structurally sound machine. The secondary frame 40 includes a plurality of horizontally extending members 41 integrally connected together. Further, a plurality of vertically extending members 42 are integrally connected to cross-members 43 and members 41. The entire secondary frame 40 is securely fastened and mounted atop frame 11. Cantileveredly mounted to cross-member 43 is a hydraulic cylinder 44 having an extendable piston rod 45 with a distal end 46 attached to a ram 47. The ram has a contact surface 48 on the side opposite of the hydraulic cylinder which will contact end 49 of cut-off portion 29. The opposite end 50 of the cut-off portion engages a vertical cutting member 51 and a horizontal cutting member 52 (FIG. 5). Further extension of the piston rod forces the cut-off portion past cutting members 51 and 52 thereby splitting the cut-off portion into individual logs.
Ram 47 has a vertically extending plate 53 (FIG. 4) fixedly secured to and between a pair of upright members 54 and 55 having outward turned legs 56 and 57 secured thereto. Legs 56 and 57 are slidably mounted atop the inward turned legs 58 and 59 of bottom horizontally extending L-shaped members 41. A pair of bars 60 and 61 are fixedly secured to upright members 54 and 55 to provide structural rigidity. The inward turned portions 58 and 59 provide a pair of rails upon which the ram may slide as the hydraulic cylinder extends and retracts its piston rod. A second pair of bars 62 and 63 are fixedly secured to the top portion of upright members 54 and 55 adding further structural rigidity. An upper member 64 is integrally mounted atop plate 53 and is positioned immediately beneath the inward turned portions of top horizontally extending members 41.
The floor of the splitting means includes a block 65 fixedly secured to frame 11 and having a pair of upwardly facing inclined surfaces 66 and 67 which intersect beneath piston rod 45 forming an upwardly facing concave seating area to receive the cut-off portion and to horizontally center the cut-off portion with respect to the intersection of cutting members 51 and 52 which cross vertically above the intersection of surfaces 66 and 67. The bottom edge 68 of plate 53 is spaced apart from surfaces 66 and 67, but is a mirror image thereof. Surfaces 66 and 67 form an upwardly facing V-shaped depression.
Cutting edges 81 and 82 are provided, respectively, on vertical member 51 and a horizontal member 52 having their opposite ends integrally connected to a vertically moveable cutting edge holder 70 (FIG. 5). Holder 70 includes a pair of vertically extending edge portions 71 and 72 (FIG. 5) which are slidably mounted within the edge flange portions of a pair of upright members 73 (FIG. 6) fixedly mounted to horizontally extending members 41 directing horizontal ramming force into frame 40 and not frame 11. For example, edge portion 71 is slidably positioned between flanges 74 and 75 of upright member 73. A hydraulic cylinder 76 has a bottom end fixedly mounted by conventional brackets 77 to member 73. The extendable piston rod 78 is mounted to an outwardly extending bracket 79 fixed to edge portion 71 of holder 70. Thus, extension and retraction of piston rod 78 will center the intersection 80 (FIG. 5) of cutting edges 51 and 52 relative to the vertical center of cut-off portion 29.
Cutting members 51 and 52 each have a sharp edge facing the ram contact surface 48. The cutting edge 81 (FIG. 6) of cutting member 51 is positioned closer to the ram contact surface 48 than the cutting edge 82 of the horizontally cutting member 52. Thus, vertical cutting edge 81 will first contact and initiate a split in the cut-off portion of the tree prior to edge 82 engaging the cut-off portion. Thus, less pressure is required to split the log into several pieces. The split logs then fall into a storage area 85 (FIG. 2) positioned in the aft section of the frame immediately behind the splitting means. Holder 70 may be disconnected from piston rod 78 and moved upwardly disengaging the upright members 73 and allowing the cutting blades to be sharpened.
Ramp 30 is aligned with floor 65 of the splitting means to enable the operator to manually push the cut-off portion 29 resting atop the horizontally extending portion 86 of the ramp down an inclined surface 87 of the ramp with cut-off portion then rolling down surface 66 (FIG. 4) and being horizontally centered relative to intersection 80 of the cutting members. Intersection 80 is horizontally centered relative to piston rod 45 and the intersection of surfaces 66 and 67. Hydraulic cylinder 76 may then be activated raising or lowering the cut-off portion 29 to vertically center the log relative to intersection 80.
Conventional hydraulic means and controls are provided for the operation of wench 17, saw 28 and hydraulic cylinders 44 and 76. A power source 88 such as an engine provided with a conventional battery 89 is mounted atop frame 11 and is connected to a supply of hydraulic liquid 90 for the pressurization thereof. Conventional conduits extend from supply 90 to the hydraulic motors attached to the wench and saw. Further, additional conventional conduits are provided for routing the pressurized hydraulic liquid to the pair of hydraulic cylinders 44 and 76. A valve control board 91 is provided to control the flow of hydraulic liquid for the activation of the wench, saw and hydraulic cylinders.
The present invention provides many advantages. First, the cable of the wench may be extended through the chute and removably attached to a fallen tree located remotely from the machine. The fallen tree may be in a ravine or other inaccessible location. Thus, by rewinding the cable attached to the fallen tree, the tree may be pulled toward the chute and eventually into the chute engaging the saw. A further advantage is that the entire machine may be operated by a single person allowing complete processing of a tree from a fallen state to the split log state. The particular structural arrangement of the various components is designed to add stability and strength to the machine thereby providing a long machine life. That is, the ram splitting means is designed in such a manner to isolate the horizontally generated compression forces from the remaining portion of the machine. Further, the splitting edges are intersected and moveable in such a manner to align the cutting edge intersection with the center of the log to be split.
While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
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|US7819348||Oct 26, 2010||Vermeer Manufacturing Company||Pivoting/telescoping winch boom for a brush chipper and method of using same|
|US7984735 *||Jul 26, 2011||Hayes Kim T||Portable log cutter|
|US9233375||Mar 29, 2012||Jan 12, 2016||Richard S. Kennedy||Wood chipper, control system therefor, and method thereof|
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|U.S. Classification||144/4.6, 144/366, 144/195.1|
|International Classification||B27L7/00, B27M1/08|
|Cooperative Classification||B27M1/08, B27L7/00|
|European Classification||B27M1/08, B27L7/00|