EP1950015A1 - Guide bar for chain saws - Google Patents
Guide bar for chain saws Download PDFInfo
- Publication number
- EP1950015A1 EP1950015A1 EP07101354A EP07101354A EP1950015A1 EP 1950015 A1 EP1950015 A1 EP 1950015A1 EP 07101354 A EP07101354 A EP 07101354A EP 07101354 A EP07101354 A EP 07101354A EP 1950015 A1 EP1950015 A1 EP 1950015A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide
- guide bar
- protrusions
- recesses
- guide plates
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B17/00—Chain saws; Equipment therefor
- B27B17/02—Chain saws equipped with guide bar
- B27B17/025—Composite guide bars, e.g. laminated, multisectioned; Guide bars of diverse material
Definitions
- the present invention relates to a guide bar for a chain saw and the guide bar includes a plurality of protrusions and recesses on two guide plates so as to reinforce the structure of the guide bar.
- a chain saw includes a motor and a guide bar which includes two guide plates and a spacer plate which is sandwiched between the two guide plates.
- the guide bar usually is made by metal and a groove is defined along a periphery of the guide bar so as to receive the chain therein.
- a conventional guide bar 60 of a chain saw is shown in Fig. 5 and generally includes two guide plates 62 and a spacer plate 61 which is sandwiched between the two guide plates 62.
- the spacer plate 61 is shorter than the guide plates 62 so as to form a groove 63 which is defined along the guide bar 60.
- the chain 70 is connected to the guide bar 60 and movable in the slot 63. When cutting objects, the chain 70 shakes and hits the guide plates 62 and the shocks are transferred to the whole chain saw. A huge noise generates due to the vibration of the chain 70 and the guide bar 60.
- FIG. 6 Another conventional guide bar 80 is disclosed in Fig. 6 and includes two guide plates 82 and a spacer plate 81 which is sandwiched between the two guide plates 82.
- the spacer plate 81 is shorter than the guide plates 82 so as to form a groove 83 which is defined along the guide bar 80 so as to receive the chain 90 therein.
- the spacer plate 81 has a first through hole 811 and each of the two guide plates 82 has a second through hole 821 which communicates with the first through hole 811.
- the vibration can be reduced when it is transferred to the first and second through holes 811, 821 so as to reduce the shaking.
- the first and second through holes 811, 821 reduce the strength of the guide bar 80.
- the object contacts the guide bar 80 and because the guide plates 82 have flat outer surfaces so that the friction between the object and the guide bar 80 increases and affects the cutting efficiency. Once the guide plates 82 are worn out, the whole guide bar has to be replaced.
- the present invention intends to provide a guide bar for a chain saw and the guide plates of the guide bar includes multiple protrusions on outer side and recesses in inner side so as to reinforce structural strength of the guide bar and reduces the friction between the guide bar and the object to be cut.
- the present invention relates to a guide bar for chain saws and the guide bar comprises a first guide plate having a plurality of first protrusions extending from an outer side thereof, a second guide plate having a plurality of second protrusions extending from an outer side thereof, and a spacer plate which is sandwiched between the first and second guide plates.
- a groove is defined along an outer periphery of the spacer plate and located between the first and second guide plates.
- the primary object of the present invention is to provide a guide bar of a chain saw wherein the two guide plates each have protrusions on out side thereof to provide better structural strength of the guide bar and less friction between the guide bar and the object to be cut.
- the guide bar 1 of the present invention is connected to a chain saw 50 and a chain 40 is engaged with the guide bar 1.
- the guide bar 1 of the present invention a first guide plate 10, a second guide plate 30 and a spacer plate 20.
- the first guide plate 10 has a plurality of first protrusions 11 extending from an outer side thereof and a plurality of first recesses 111 are defined in an inner side thereof.
- the first recesses 111 are located corresponding to the first protrusions 11.
- the second guide plate 30 has a plurality of second protrusions 31 extending from an outer side thereof and a plurality of second recesses 311 are defined in an inner side thereof.
- the second recesses 311 are located corresponding to the second protrusions 31.
- the first and second protrusions 11,31 are located symmetrically relative to the spacer plate 20.
- the spacer plate 20 is sandwiched between the first and second guide plates 10, 30.
- a groove 21 is defined along an outer periphery of the spacer plate 20 and located between the first and second guide plates 10, 30 so as to receive the chain 40.
- the first and second guide plates 10, 30 are connected with each other by welding, riveting or any known method.
- the first protrusions 11 and the second protrusions 31 project from the outer surfaces of the first and second guide plates 10, 30 such that when the chain saw 50 is cutting a bulky object, only the first and second protrusions 11, 31 contact the object such that only limited friction is occurred between the guide bar 1 and the object.
- the first protrusions 11 and recesses 111 and the second protrusions 31 and recesses 311 reinforce the structural strength of the first and second guide plates 10, 30.
- the shocks or vibration can be shared by the protrusions 11, 31 and recesses 111, 311 by slightly deformation to reduce the shaking during using the chain saw 50.
- the first and second protrusions 11,31 and the first and second protrusions 31 and recesses 311 can be arranged in any known pattern or shapes.
- the first and second protrusions 11, 31 are curved protrusions.
- the first and second protrusions 11, 31 can also be elongated ridges or different sizes and shapes.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Abstract
Description
- The present invention relates to a guide bar for a chain saw and the guide bar includes a plurality of protrusions and recesses on two guide plates so as to reinforce the structure of the guide bar.
- A chain saw includes a motor and a guide bar which includes two guide plates and a spacer plate which is sandwiched between the two guide plates. The guide bar usually is made by metal and a groove is defined along a periphery of the guide bar so as to receive the chain therein.
- A
conventional guide bar 60 of a chain saw is shown inFig. 5 and generally includes twoguide plates 62 and aspacer plate 61 which is sandwiched between the twoguide plates 62. Thespacer plate 61 is shorter than theguide plates 62 so as to form agroove 63 which is defined along theguide bar 60. Thechain 70 is connected to theguide bar 60 and movable in theslot 63. When cutting objects, thechain 70 shakes and hits theguide plates 62 and the shocks are transferred to the whole chain saw. A huge noise generates due to the vibration of thechain 70 and theguide bar 60. - Another
conventional guide bar 80 is disclosed inFig. 6 and includes twoguide plates 82 and aspacer plate 81 which is sandwiched between the twoguide plates 82. Thespacer plate 81 is shorter than theguide plates 82 so as to form agroove 83 which is defined along theguide bar 80 so as to receive thechain 90 therein. Thespacer plate 81 has a first throughhole 811 and each of the twoguide plates 82 has a second throughhole 821 which communicates with the first throughhole 811. The vibration can be reduced when it is transferred to the first and second throughholes holes guide bar 80. Besides, when the chain saw cuts a thick object, the object contacts theguide bar 80 and because theguide plates 82 have flat outer surfaces so that the friction between the object and theguide bar 80 increases and affects the cutting efficiency. Once theguide plates 82 are worn out, the whole guide bar has to be replaced. - The present invention intends to provide a guide bar for a chain saw and the guide plates of the guide bar includes multiple protrusions on outer side and recesses in inner side so as to reinforce structural strength of the guide bar and reduces the friction between the guide bar and the object to be cut.
- The present invention relates to a guide bar for chain saws and the guide bar comprises a first guide plate having a plurality of first protrusions extending from an outer side thereof, a second guide plate having a plurality of second protrusions extending from an outer side thereof, and a spacer plate which is sandwiched between the first and second guide plates. A groove is defined along an outer periphery of the spacer plate and located between the first and second guide plates.
- The primary object of the present invention is to provide a guide bar of a chain saw wherein the two guide plates each have protrusions on out side thereof to provide better structural strength of the guide bar and less friction between the guide bar and the object to be cut.
- The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
-
-
Fig. 1 is a perspective view to show the guide bar of the present invention; -
Fig. 2 is an exploded view to show the guide bar of the present invention; -
Fig. 3 is a cross sectional view along line A-A inFig. 4 to show the guide bar of the present invention; -
Fig. 4 shows the guide bar of the present invention used with a chain saw; -
Fig. 5 is a cross sectional view to show a conventional guide bar, and -
Fig. 6 is a cross sectional view to show another conventional guide bar. - Referring to
Fig. 4 , the guide bar 1 of the present invention is connected to achain saw 50 and achain 40 is engaged with the guide bar 1. - Referring to
Figs. 1 to 3 , the guide bar 1 of the present invention afirst guide plate 10, asecond guide plate 30 and aspacer plate 20. Thefirst guide plate 10 has a plurality offirst protrusions 11 extending from an outer side thereof and a plurality offirst recesses 111 are defined in an inner side thereof. Thefirst recesses 111 are located corresponding to thefirst protrusions 11. Thesecond guide plate 30 has a plurality ofsecond protrusions 31 extending from an outer side thereof and a plurality ofsecond recesses 311 are defined in an inner side thereof. Thesecond recesses 311 are located corresponding to thesecond protrusions 31. The first andsecond protrusions spacer plate 20. Thespacer plate 20 is sandwiched between the first andsecond guide plates groove 21 is defined along an outer periphery of thespacer plate 20 and located between the first andsecond guide plates chain 40. The first andsecond guide plates - The
first protrusions 11 and thesecond protrusions 31 project from the outer surfaces of the first andsecond guide plates second protrusions first protrusions 11 andrecesses 111 and thesecond protrusions 31 andrecesses 311 reinforce the structural strength of the first andsecond guide plates protrusions recesses - The first and
second protrusions second protrusions 31 andrecesses 311 can be arranged in any known pattern or shapes. In this embodiment, the first andsecond protrusions second protrusions - While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Claims (4)
- A guide bar for chain saws, comprising:a first guide plate having a plurality of first protrusions extending from an outer side thereof;a second guide plate having a plurality of second protrusions extending from an outer side thereof, anda spacer plate sandwiched between the first and second guide plates, a groove defined along an outer periphery of the spacer plate and located between the first and second guide plates.
- The guide bar as claimed in claim 1, wherein the first guide plate has a plurality of first recesses defined in an inner side thereof and the first recesses are located corresponding to the first protrusions, the second guide plate has a plurality of second recesses defined in an inner side thereof and the second recesses are located corresponding to the second protrusions,
- The guide bar as claimed in claim 1, wherein the first and second protrusions are curved protrusions.
- The guide bar as claimed in claim 1, wherein the first and second protrusions are located symmetrically.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07101354A EP1950015A1 (en) | 2007-01-29 | 2007-01-29 | Guide bar for chain saws |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07101354A EP1950015A1 (en) | 2007-01-29 | 2007-01-29 | Guide bar for chain saws |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1950015A1 true EP1950015A1 (en) | 2008-07-30 |
Family
ID=38068681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07101354A Withdrawn EP1950015A1 (en) | 2007-01-29 | 2007-01-29 | Guide bar for chain saws |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1950015A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017178295A1 (en) * | 2016-04-15 | 2017-10-19 | Husqvarna Ab | Lightweight chainsaw guide bar |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5569401A (en) * | 1978-11-18 | 1980-05-26 | Tsutomu Sakanishi | Guide bar for chain saw |
FR2599292A1 (en) | 1986-06-02 | 1987-12-04 | Bruccheri Gaetan | ANTI-BLOCKING DEVICE FOR CHAIN SAWS |
US5216814A (en) * | 1991-03-18 | 1993-06-08 | National Research Council Of Canada | Chain saw guide bar |
JPH06297403A (en) | 1993-04-13 | 1994-10-25 | Miyanaga:Kk | Guide plate for chain saw |
US5564192A (en) * | 1994-06-15 | 1996-10-15 | Andreas Stihl | Guide bar for a saw chain of a motor-driven chain saw |
-
2007
- 2007-01-29 EP EP07101354A patent/EP1950015A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5569401A (en) * | 1978-11-18 | 1980-05-26 | Tsutomu Sakanishi | Guide bar for chain saw |
FR2599292A1 (en) | 1986-06-02 | 1987-12-04 | Bruccheri Gaetan | ANTI-BLOCKING DEVICE FOR CHAIN SAWS |
US5216814A (en) * | 1991-03-18 | 1993-06-08 | National Research Council Of Canada | Chain saw guide bar |
JPH06297403A (en) | 1993-04-13 | 1994-10-25 | Miyanaga:Kk | Guide plate for chain saw |
US5564192A (en) * | 1994-06-15 | 1996-10-15 | Andreas Stihl | Guide bar for a saw chain of a motor-driven chain saw |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017178295A1 (en) * | 2016-04-15 | 2017-10-19 | Husqvarna Ab | Lightweight chainsaw guide bar |
US11230028B2 (en) | 2016-04-15 | 2022-01-25 | Husqvarna Ab | Lightweight chainsaw guide bar |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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Effective date: 20090122 |
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17Q | First examination report despatched |
Effective date: 20090305 |
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RTI1 | Title (correction) |
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18D | Application deemed to be withdrawn |
Effective date: 20120621 |