CA1057629A - Felling and cutting device - Google Patents
Felling and cutting deviceInfo
- Publication number
- CA1057629A CA1057629A CA266,650A CA266650A CA1057629A CA 1057629 A CA1057629 A CA 1057629A CA 266650 A CA266650 A CA 266650A CA 1057629 A CA1057629 A CA 1057629A
- Authority
- CA
- Canada
- Prior art keywords
- cutting
- blade
- base disk
- edge
- disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920002522 Wood fibre Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G23/00—Forestry
- A01G23/02—Transplanting, uprooting, felling or delimbing trees
- A01G23/08—Felling trees
- A01G23/087—Shearing apparatus or the like specially adapted for felling trees
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Harvester Elements (AREA)
- Catching Or Destruction (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A device for cutting or felling trees comprising a rotating blade of uniformly increasing width in the shape of a partial, truncated cone mounted on the edge of a base disk.
The blade does not extend completely around the base disk.
Cutting is performed by attacking the tree at an angle and rotating the blade in the direction of increasing width.
A device for cutting or felling trees comprising a rotating blade of uniformly increasing width in the shape of a partial, truncated cone mounted on the edge of a base disk.
The blade does not extend completely around the base disk.
Cutting is performed by attacking the tree at an angle and rotating the blade in the direction of increasing width.
Description
~5~
This inven-tion is concerned with the cutting portion of the felling or cutting device.
Known devices, as a rule, operate either on the sawing principle or on the guillotine principle. A drawback of these devices is then complicated and expensive construction. Sensi-tivity to disturbances is a weak point of a saw device, because the rapidly moving saw chain ox saw blade is damaged badly when under practical conditions, it comes into contact with a foreign object such as a stone or equivalent. This results in the blade of the device having to be put in repair. Frequent interruptions of this nature result in reduced output. Further- ~
more, use of the devices requires great care and precision from ~ ~ ;
the operator.
The guillotine-type cutting devices are more reliable in operation but due to their mode of operation, they cause mechanical damage to the wood. For this reason, according to current opinion, they are not suitable for felling or cutting trunks intended for lumber. In accordance with the present ;~
.~ .
invention there is provided a slower operating device having a curved cutting track which slashes the wood fibers instead of -~
tearing them.
By means of the device of the present invention, it ` has been possible to combine:
(a) the reliability of operation of the guillotine- -type devices, because the device has no blade that moves fast and soon becomes dull; and (b) the undamaged products of the saw-type devices because of the curved cutting track and the cutting of the wood fibers by slashing.
In accordance with a preferred embodiment of the `~
present invention, there is provided a device for cutting or -:~
., .. .-. . : . . . : .- , -.,.. ,. . : ,::. : ... : :
~ 762~ ~
: ' felling a tree comprising~
(a) a rotata~le base disk, and (b) a curved cuttiny blade of increasing width in the , shape of a partial truncated cone mounted along a , portion o~ the periphery of the base disk, said disk constituting the truncating plane, the ; . ~ .
' increasing width of said blade causing the cutting ; .
edge thereof to be located progressively farther from the truncating plane, the widest portion of the blade having an edge constituting a rear edge .. :
extending abruptly downward to the surface of the ~i base disk.
:j The construction of one embodiment of the felling and . cutting device in accordance with the invention i5 shown in . the accompanying drawings, wherein:
.i. , :
,~: '.. ' '1 ~. :' , ', ' ' ~ ~,~
.:
. ; ~: . ~ .
. ' , .
f ~ ~
.'';f ::
- la -~1~S5~9 FIGURE 1 shows a front view of the cutting portion, and FIGURE 2 shows a side view of the cutting portion as well as the tree to be felled, the holding means, and the motor rotating the cutting por-tion fastened to the frame of the device~
The cutting portion shown in Figure 1 consists of two ; components. a circular base disk 2 and a cutting blade 3, having a cutting edge 9 fastened to the disk~ e.g. at an angle of 120.
10 The cutting blade 3 is fastened to the edge of the base disk 2 so that part of the edge of the base disk 2 remains free of the blade, for example 1/6 of the edge. The width of the blade 3 becomes uniformly wider, e.g. from 0 cm to 60 cm, depending on the desired dimensioning. The shape of the blade 3 in relation ;
to the base disk 2 can be characterized as a partial truncated ~ -~
;~ :
cone in which the base disk 2 is the cut-off section of the cone and the blade 3 is a part of the side of the truncated zone.
The cone is characterized as "partial" because, as shown in Figures 1 and 2, the blade does not extend completely around the circumference of disk 2.
The cutting portion is mounted to the frame 6 of the ;
device so that, after grasping of the tree 8, the ~lade 3 is at the bottom edge of the cutting portion, perpendicular to the tree.
The device is provided with a motor for rotating the cutting por~
tion and with holding means 5. ~;;
Operation of the device in accordance with the inven~
tion is as follows: The cutting portion is rotated by the motor `
4 into such a position that the blade-free section at the edge ~;
of the base disk 2 is facing down, i.e. is positioned on the `
same straigXt line with the holding means 5. The tree is grasped f1rmly by the holding means 5, the blade-~ree edge o~
:.
.--' ~ , ; 2 , -~
. ~ -~S~Z9 the base disk 2 being at the desired cutting point. By means of the motor 4, the cutting portion is ro~ated in the direc~ion in which the blade 3 becomes wider. Then, when rotating and uniformly becoming wider, the cutting edge 9 of the blade 3 cuts the tree by slashing until the width of the blade is larger ~ -than the diameter of the tree.
!
, .
T ~
: :
.'' ' "
."~ ~`' ."
.'j ~':
." `~
", ~
. , - 3 ~
This inven-tion is concerned with the cutting portion of the felling or cutting device.
Known devices, as a rule, operate either on the sawing principle or on the guillotine principle. A drawback of these devices is then complicated and expensive construction. Sensi-tivity to disturbances is a weak point of a saw device, because the rapidly moving saw chain ox saw blade is damaged badly when under practical conditions, it comes into contact with a foreign object such as a stone or equivalent. This results in the blade of the device having to be put in repair. Frequent interruptions of this nature result in reduced output. Further- ~
more, use of the devices requires great care and precision from ~ ~ ;
the operator.
The guillotine-type cutting devices are more reliable in operation but due to their mode of operation, they cause mechanical damage to the wood. For this reason, according to current opinion, they are not suitable for felling or cutting trunks intended for lumber. In accordance with the present ;~
.~ .
invention there is provided a slower operating device having a curved cutting track which slashes the wood fibers instead of -~
tearing them.
By means of the device of the present invention, it ` has been possible to combine:
(a) the reliability of operation of the guillotine- -type devices, because the device has no blade that moves fast and soon becomes dull; and (b) the undamaged products of the saw-type devices because of the curved cutting track and the cutting of the wood fibers by slashing.
In accordance with a preferred embodiment of the `~
present invention, there is provided a device for cutting or -:~
., .. .-. . : . . . : .- , -.,.. ,. . : ,::. : ... : :
~ 762~ ~
: ' felling a tree comprising~
(a) a rotata~le base disk, and (b) a curved cuttiny blade of increasing width in the , shape of a partial truncated cone mounted along a , portion o~ the periphery of the base disk, said disk constituting the truncating plane, the ; . ~ .
' increasing width of said blade causing the cutting ; .
edge thereof to be located progressively farther from the truncating plane, the widest portion of the blade having an edge constituting a rear edge .. :
extending abruptly downward to the surface of the ~i base disk.
:j The construction of one embodiment of the felling and . cutting device in accordance with the invention i5 shown in . the accompanying drawings, wherein:
.i. , :
,~: '.. ' '1 ~. :' , ', ' ' ~ ~,~
.:
. ; ~: . ~ .
. ' , .
f ~ ~
.'';f ::
- la -~1~S5~9 FIGURE 1 shows a front view of the cutting portion, and FIGURE 2 shows a side view of the cutting portion as well as the tree to be felled, the holding means, and the motor rotating the cutting por-tion fastened to the frame of the device~
The cutting portion shown in Figure 1 consists of two ; components. a circular base disk 2 and a cutting blade 3, having a cutting edge 9 fastened to the disk~ e.g. at an angle of 120.
10 The cutting blade 3 is fastened to the edge of the base disk 2 so that part of the edge of the base disk 2 remains free of the blade, for example 1/6 of the edge. The width of the blade 3 becomes uniformly wider, e.g. from 0 cm to 60 cm, depending on the desired dimensioning. The shape of the blade 3 in relation ;
to the base disk 2 can be characterized as a partial truncated ~ -~
;~ :
cone in which the base disk 2 is the cut-off section of the cone and the blade 3 is a part of the side of the truncated zone.
The cone is characterized as "partial" because, as shown in Figures 1 and 2, the blade does not extend completely around the circumference of disk 2.
The cutting portion is mounted to the frame 6 of the ;
device so that, after grasping of the tree 8, the ~lade 3 is at the bottom edge of the cutting portion, perpendicular to the tree.
The device is provided with a motor for rotating the cutting por~
tion and with holding means 5. ~;;
Operation of the device in accordance with the inven~
tion is as follows: The cutting portion is rotated by the motor `
4 into such a position that the blade-free section at the edge ~;
of the base disk 2 is facing down, i.e. is positioned on the `
same straigXt line with the holding means 5. The tree is grasped f1rmly by the holding means 5, the blade-~ree edge o~
:.
.--' ~ , ; 2 , -~
. ~ -~S~Z9 the base disk 2 being at the desired cutting point. By means of the motor 4, the cutting portion is ro~ated in the direc~ion in which the blade 3 becomes wider. Then, when rotating and uniformly becoming wider, the cutting edge 9 of the blade 3 cuts the tree by slashing until the width of the blade is larger ~ -than the diameter of the tree.
!
, .
T ~
: :
.'' ' "
."~ ~`' ."
.'j ~':
." `~
", ~
. , - 3 ~
Claims (6)
1. A device for cutting or felling a tree comprising:
(a) a rotatable base disk, and (b) a curved cutting blade of increasing width in the shape of a partial truncated cone mounted along a portion of the periphery of the base disk, said disk constituting the truncating plane, the increasing width of said blade causing the cutting edge thereof to be located progressively farther from the truncating plane, the widest portion of the blade having an edge constituting a rear edge extending abruptly downward to the surface of the base disk.
(a) a rotatable base disk, and (b) a curved cutting blade of increasing width in the shape of a partial truncated cone mounted along a portion of the periphery of the base disk, said disk constituting the truncating plane, the increasing width of said blade causing the cutting edge thereof to be located progressively farther from the truncating plane, the widest portion of the blade having an edge constituting a rear edge extending abruptly downward to the surface of the base disk.
2. The device of Claim 1, wherein the width of the cutting blade increases continuously.
3. The device of Claim 1, wherein the width of the cutting blade increases in a stepwise manner.
4. The device of Claim 1, wherein the cutting edge of the blade is toothed.
5. The device of Claim 1, wherein the rear edge is shar-pened to provide a cutting edge.
6. The device of Claim 1 further comprising:
(a) a framework for rotatably mounting the base disk;
(b) holding means connected to said framework for attaching said device in cutting relation to a tree; and (c) means connected to said base disk for rotating said disk and cutting blade.
(a) a framework for rotatably mounting the base disk;
(b) holding means connected to said framework for attaching said device in cutting relation to a tree; and (c) means connected to said base disk for rotating said disk and cutting blade.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI753366A FI52914C (en) | 1975-11-28 | 1975-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1057629A true CA1057629A (en) | 1979-07-03 |
Family
ID=8509580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA266,650A Expired CA1057629A (en) | 1975-11-28 | 1976-11-26 | Felling and cutting device |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA1057629A (en) |
| DE (1) | DE2652990C2 (en) |
| FI (1) | FI52914C (en) |
| FR (1) | FR2332702A1 (en) |
| SE (1) | SE428410B (en) |
| SU (1) | SU919579A3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3919193C1 (en) * | 1989-06-13 | 1990-05-23 | Markgraf, Karl, 3181 Bahrdorf, De | |
| DE202010011417U1 (en) | 2010-08-10 | 2010-11-11 | Spörl, Olaf | Device for trimming and / or felling trees |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE314553B (en) * | 1966-02-15 | 1969-09-08 | Kockums Mekaniska Verkstads Ab | |
| FR2024223A1 (en) * | 1968-11-26 | 1970-08-28 | Beloit Corp | |
| US3735788A (en) * | 1968-12-10 | 1973-05-29 | Rome Industries | Tree harvesting apparatus |
| US3627004A (en) * | 1969-12-17 | 1971-12-14 | Kenneth J Ramey | Rotatable tree shear device |
| US3809135A (en) * | 1972-07-27 | 1974-05-07 | R Dove | Earth working blade with saw teeth |
-
1975
- 1975-11-28 FI FI753366A patent/FI52914C/fi not_active IP Right Cessation
-
1976
- 1976-11-22 DE DE19762652990 patent/DE2652990C2/en not_active Expired
- 1976-11-25 SE SE7613176A patent/SE428410B/en not_active IP Right Cessation
- 1976-11-26 SU SU762423806A patent/SU919579A3/en active
- 1976-11-26 FR FR7635717A patent/FR2332702A1/en active Granted
- 1976-11-26 CA CA266,650A patent/CA1057629A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SU919579A3 (en) | 1982-04-07 |
| FR2332702B1 (en) | 1982-02-19 |
| DE2652990A1 (en) | 1977-06-08 |
| SE7613176L (en) | 1977-05-29 |
| FI753366A (en) | 1977-05-29 |
| SE428410B (en) | 1983-07-04 |
| FR2332702A1 (en) | 1977-06-24 |
| DE2652990C2 (en) | 1986-01-16 |
| FI52914C (en) | 1978-01-10 |
| FI52914B (en) | 1977-09-30 |
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