AU2014385783B2 - A power tool with dust deflector - Google Patents

A power tool with dust deflector Download PDF

Info

Publication number
AU2014385783B2
AU2014385783B2 AU2014385783A AU2014385783A AU2014385783B2 AU 2014385783 B2 AU2014385783 B2 AU 2014385783B2 AU 2014385783 A AU2014385783 A AU 2014385783A AU 2014385783 A AU2014385783 A AU 2014385783A AU 2014385783 B2 AU2014385783 B2 AU 2014385783B2
Authority
AU
Australia
Prior art keywords
debris
air
door
deflecting device
chain saw
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.)
Active
Application number
AU2014385783A
Other versions
AU2014385783A1 (en
Inventor
Chin Hung Lam
Jeff NESOM
Zu Kun TIAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Techtronic Outdoor Products Technology Ltd
Original Assignee
Techtronic Outdoor Products Technology Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Techtronic Outdoor Products Technology Ltd filed Critical Techtronic Outdoor Products Technology Ltd
Publication of AU2014385783A1 publication Critical patent/AU2014385783A1/en
Application granted granted Critical
Publication of AU2014385783B2 publication Critical patent/AU2014385783B2/en
Priority to AU2019101430A priority Critical patent/AU2019101430A4/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/006—Accessories specially designed for sawing machines or sawing devices for removing or collecting chips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/003—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for chain saws

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

A power tool, comprising: a body having a motor arranged to drive an operation member adapted to perform an operation capable of generating debris, wherein the body comprises a debris deflector arranged to deflect the debris. The debris deflector is movable between a deflecting position in which the debris deflector is extended from the body, and a non-deflecting position in which the debris deflector is retracted into the body.

Description

A POWER TOOL WITH DUST DEFLECTOR
Field of Invention
The present invention relates to a power tool such as a chainsaw. Particularly but not exclusively, the present invention also relates to a power tool having a deflector for directing saw dusts away from the operator during cutting.
Background of the Invention
Conventional power tools such as chainsaws or circular saws have been commonly used for cutting a work piece or trees. When the blade engages the subject to be cut during the cutting action, debris such as saw dusts or wood chips will propel upwardly and outwardly from the cutting site. This is particularly undesirable for portable tools 15 of which the operator would be handling the tool at a closer distance from the cutting site during the operation, and therefore a significant amount of the propelling saw dusts or chips is likely to reach the operator.
Summary of the Invention
In a first aspect, the invention provides a debris deflecting device for a chain saw, comprising: a debris deflector arranged to selectively direct exhaust gas generated by a motor in a body of the chain saw and thereby deflect debris generated by a saw blade during an operation of the chain saw; wherein the debris deflector includes a 25 door movable between an air directing position and an air non-directing position;
when the door is in the air directing position, the exhaust gas generated by the motor is discharged by an air vent on the body of the chain saw, the exhaust gas is further redirected away from an operator of the chain saw and in an air discharging direction transverse to a cutting direction during the operation of the chain saw, so as to protect 30 the operator by utilizing the exhaust gas to deflect the generated debris towards the air discharging direction; and when the door is in the air non-directing position, the exhaust gas discharged by the air vent is not deflected by the debris deflector.
11572877_1 (GHMatters) P103647.AU
-22014385783 30 Jul 2019
In one embodiment of the first aspect, the debris deflecting device further comprises an actuating means operable to move the debris deflector between the deflecting position and the non-deflecting position.
In one embodiment of the first aspect, the debris deflecting device further comprises a locking means adapted to lock the debris deflector at the deflecting position and the non-deflecting position.
In one embodiment of the first aspect, the actuating means comprises a rotatable knob 10 operable for extending and retracting the debris deflector.
In one embodiment of the first aspect, the rotatable knob connects with a gear member adapted to engage a plurality of notches at the debris deflector.
In one embodiment of the first aspect, the actuating means comprises a press button operable for extending the debris deflector.
In one embodiment of the first aspect, the debris deflector is retractable manually by applying a pressure on the debris deflector towards the body.
In one embodiment of the first aspect, the locking means comprises a resilient member.
In one embodiment of the first aspect, the debris deflector is elongated with a planar 25 deflecting surface.
In accordance with the first aspect, there is provided a chain saw comprising: a body having a motor arranged to drive an operation member adapted to perform an operation capable of generating debris, wherein the body comprises a debris deflector 30 arranged to deflect the debris as described herein.
In accordance with a second aspect, there is provided a power tool comprising: a body having a motor arranged to drive an operation member adapted to perform an
11572877_1 (GHMatters) P103647.AU
-32014385783 30 Jul 2019 operation capable of generating debris, wherein the body comprises a debris deflector arranged to deflect the debris.
In one embodiment of the second aspect, the debris deflector is movable between a 5 deflecting position in which the debris deflector is extended from the body, and a nondeflecting position in which the debris deflector is retracted into the body.
In one embodiment of the second aspect, the body comprises an actuating means operable to move the debris deflector between the deflecting position and the non10 deflecting position.
In one embodiment of the second aspect, the body comprises a first locking means adapted to lock the debris deflector at the deflecting position and the non-deflecting position.
In one embodiment of the second aspect, the actuating means comprises a rotatable knob operable for extending and retracting the debris deflector.
In one embodiment of the second aspect, the rotatable knob connects with a gear 20 member adapted to engage a plurality of notches at the debris deflector.
In one embodiment of the second aspect, the actuating means comprises a press button operable for extending the debris deflector.
In one embodiment of the second aspect, the debris deflector is retractable manually by applying a pressure on the debris deflector towards the body.
In one embodiment of the second aspect, the first locking means comprises a resilient member.
In one embodiment of the second aspect, the debris deflector is elongated with a planar deflecting surface.
11572877_1 (GHMatters) P103647.AU
-42014385783 30 Jul 2019
In one embodiment of the second aspect, the debris deflector is arranged to direct an air flow generated by the motor to deflect the debris.
In one embodiment of the second aspect, the debris deflector is pivotedly connected 5 with the body.
In one embodiment of the second aspect, the debris deflector comprises a door movable between an air directing position in which the air flow is deflected, and an air non-directing position in which the air flow is not deflected.
In one embodiment of the second aspect, the door is pivotedly movable between the air directing position and the air non-directing position.
In one embodiment of the second aspect, the door comprises a sliding plate slidably 15 movable between the air directing position and the air non-directing position.
In one embodiment of the second aspect, the debris deflector comprises a second locking means adapted to lock the door at the air directing position and the air nondirecting position.
In one embodiment of the second aspect, the second locking means comprises a resilient member.
In one embodiment of the second aspect, the second locking means comprises a latch 25 mechanism.
In one embodiment of the second aspect, the door is movable from the air nondirecting position to the air directing position by means of gravitation force.
In one embodiment of the second aspect, the door is movable from the air nondirecting position to the air directing position by the air flow generated by the motor.
In one embodiment of the second aspect, the air flow is an exhaust gas discharged from the motor.
11572877_1 (GHMatters) P103647.AU
-52014385783 30 Jul 2019
In one embodiment of the second aspect, the debris deflector is adapted to deflect the air flow in a direction substantially away from an operator of the power tool.
In one embodiment of the second aspect, the debris deflector is adapted to deflect the air flow in a direction substantially transverse to a direction of movement of the operation member.
In one embodiment of the second aspect, the power tool is a chainsaw.
In one embodiment of the second aspect, the motor is powered by electricity or gasoline.
In one embodiment of the second aspect, the motor is an AC motor or a DC motor.
In one embodiment of the second aspect, the operation member comprises a saw blade.
In accordance with a third aspect, there is provided a debris deflecting device for a power tool comprising: a debris deflector arranged to direct an air flow generated by a 20 motor of the power tool to deflect debris generated by the power tool.
In one embodiment of the third aspect, the debris deflector is pivotedly connected with a body of the power tool.
In one embodiment of the third aspect, the debris deflector comprises a door movable between an air directing position in which the air flow is deflected, and an air nondirecting position in which the air flow is not deflected.
In one embodiment of the third aspect, the door is pivotedly movable between the air 30 directing position and the air non-directing position.
In one embodiment of the third aspect, the door comprises a sliding plate slidably movable between the air directing position and the air non-directing position.
11572877_1 (GHMatters) P103647.AU
-62014385783 30 Jul 2019
In one embodiment of the third aspect, the debris deflector comprises a locking means adapted to lock the door at the air directing position and the air non-directing position. In one embodiment of the third aspect, the locking means comprises a resilient member.
In one embodiment of the third aspect, the locking means comprises a latch mechanism.
In one embodiment of the third aspect, the door is movable from the air non-directing 10 position to the air directing position by means of gravitation force.
In one embodiment of the third aspect, the door is movable from the air non-directing position to the air directing position by the air flow generated by the motor.
In one embodiment of the third aspect, the air flow is an exhaust gas discharged from the motor.
In one embodiment of the third aspect, the debris deflector is adapted to deflect the air flow in a direction substantially away from an operator of the power tool.
In one embodiment of the third aspect, the debris deflector is adapted to deflect the air flow in a direction substantially transverse to a direction of movement of an operation member of the power tool.
In one embodiment of the second and third aspect, the power tool is a chainsaw.
In one embodiment of the third aspect, the motor is powered by electricity or gasoline.
In one embodiment of the third aspect, the motor is an AC motor or a DC motor.
In one embodiment of the third aspect, the operation member comprises a saw blade.
Brief Description of the Drawings
11572877_1 (GHMatters) P103647.AU
-72014385783 30 Jul 2019
Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings in which:
Figure 1 is a photographic image showing the discharge of saw dust during the 5 operation of a chainsaw in the prior art;
Figure 2A is a perspective view of a debris deflecting device for a power tool in accordance with a first embodiment of the present invention;
Figure 2B is another perspective view of the debris deflecting device of the first embodiment as shown in Figure 2A;
Figure 3A is a perspective view of a debris deflecting device for a power tool in accordance with a second embodiment of the present invention;
Figure 3B is another perspective view of the debris deflecting device of the second embodiment as shown in Figure 3A;
Figure 4A is a perspective view of a debris deflecting device for a power tool in 20 accordance with a third embodiment of the present invention;
Figure 4B is another perspective view of the debris deflecting device of the third embodiment as shown in Figure 4A;
Figure 5A is a perspective view of a debris deflecting device for a power tool in accordance with a fourth embodiment of the present invention;
Figure 5B is another perspective view of the debris deflecting device of the fourth embodiment as shown in Figure 5A;
Figure 6A is a perspective view of a debris deflecting device for a power tool in accordance with a fifth embodiment of the present invention; and
11572877_1 (GHMatters) P103647.AU
-82014385783 30 Jul 2019
Figure 6B is another perspective view of the debris deflecting device of the fifth embodiment as shown in Figure 6A.
Figure 7A is a photographic image showing the deflection path of debris during the 5 operation of a power tool of the present invention when viewed from the front of the power tool.
Figure 7B is a photographic image showing the deflection path of debris during the operation of the power tool of Figure 7A when viewed from the top of the power tool.
Detailed Description of the Preferred Embodiments
The discharge of debris such as saw dust during the operation of a traditional chainsaw is shown in Figure 1. When the moving blade of a chainsaw engages an 15 object to be cut, such as a piece of wood log or a tree trunk, the generated debris such as saw dusts or wood chips will propel in generally all directions, and particularly, upwardly and outwardly from the cutting site. A significant amount of the propelling saw dusts or chips will be discharged towards the operator or anything near the cutting site which will be messy and inconvenient. In some circumstances, the debris 20 may come with sharp edges or in the form of tiny splinters which may cause irritation or even injury to the operator.
The present invention relates to a power tool, which includes but is not limited to a chainsaw. The power tool comprises a debris deflecting device for deflecting the 25 generated debris from the operator during the operation of the power tool. The power tool includes a body having a motor, such as an electric motor or a gasoline motor.
The motor is capable of actuating an operation member, which may include a drive shaft for driving the movement of a saw blade to perform the operation of the chainsaw. The body further comprises a debris deflector arranged to deflect debris 30 generated during the operation of the chainsaw.
Figures 2A and 2B show a first embodiment of the present invention. As shown in the figures, the power tool 100 includes a debris deflector 104 movable between a deflecting position 120 in which the debris deflector 104 is extended from the body
11572877_1 (GHMatters) P103647.AU
-92014385783 30 Jul 2019
102, and a non-deflecting position 122 in which the debris deflector 104 is retracted into the body 102.
Preferably, the debris deflector 104 comprises an elongated body 110 with a planar deflecting surface 118 as shown in the figures. Alternatively, the debris deflector can be of other possible configurations such as a bending body with a curved deflecting surface, as long as a person skilled in the art would consider suitable in performing the debris deflecting function.
Preferably, the elongated body 110 includes a portion 124 that is in a length that extends out from the body 102 which is long enough to deflect the debris generated during operation of the power tool 100. Preferably, the length of the potion 124 of the debris deflector 104 that extends out is 25 mm, alternatively, the length of the portion 124 that extends out may be longer than 25 mm for a better debris deflecting performance, or shorter than 25 mm in some other designs such as a simpler debris deflector structure.
In this embodiment, during the operation of the saw chain 100, the debris deflector
104 is arranged to deflect the saw dust generated in a controlled manner by blocking some of the paths that the saw dust may propel. The debris will then be forced to propel in certain direction, for example, the debris deflector may force the debris to propel only along the cutting direction but not towards the operator. Examples of operation will be described below in more details in the later part of this disclosure.
Preferably, the body 102 comprises an actuating means 112 operable to move the debris deflector 104 between the deflecting position 120 and the non-deflecting position 122. In this embodiment, the actuating means comprises a rotatable knob 112 operable for extending or retracting the elongated body 110 of the debris deflector 104, the rotatable knob 112 connects with a gear member 114 adapted to engage a plurality of notches 116 at the debris deflector 120.
When a user operates the power tool 100 with the debris deflecting function, the user may rotate the knob 112 in a direction, such that the gear 114 rotates accordingly and move the elongated body 110 of the debris deflector 120 to the deflecting position 120,
11572877_1 (GHMatters) P103647.AU
- 102014385783 30 Jul 2019 which is extending out from the body 102 as shown in Figure 2A and Figure 2B. When the user decide to store the power tool 100 or to operate the power tool 100 without the debris deflecting function, the user may rotate the knob 112 in a reversed direction, such that the gear 114 rotates accordingly in a reversed direction and move 5 the elongated body 110 of the debris deflector 104 to the non-deflecting position 122.
Advantageously, accidental damage to the debris deflector 104 may be avoided by retracting and protecting the debris deflector 104 in the body 102 when the power tool 100 is stored or moved.
Referring to Figure 3A and 3B, preferably, the body 202 comprises an actuating means operable to move the debris deflector 204 between the deflecting position 220 and the non-deflecting position 222. In this embodiment, the actuating means comprises a press button 212 operable for extending the debris deflector 204, the 15 debris deflector 204 is retractable manually by applying a pressure on the debris deflector 204 towards the body 202.
Similar to the debris deflector 104, the debris deflector 204 comprises an elongated body 210. The elongated body 210 includes a portion 224 that is in a length that 20 extends out from the body 202 which is long enough to deflect the debris generated during operation of the power tool 200.
When a user operates the power tool 200 with the debris deflecting function, the user may press the button 212 on the body 202, such that the elongated body 210 of the 25 debris deflector 204 move to the deflecting position 220, which is extending out from the body 202 as shown in Figure 3A and Figure 3B. When the user decides to store the power tool 200 or to operate the power tool 200 without the debris deflecting function, the user may apply a pressure on the elongated body 210 of the debris deflector 204 towards the body 202 and move the debris deflector 204 to the non30 deflecting position 222. Optionally, the body 202 may include a first locking means
214 adapted to lock the debris deflector 204 at the deflecting position 220 and the non-deflecting position 222. Preferably, the first locking means 214 comprises a resilient member 216, which is arrange to assist the release and locking of the debris deflector 204. For example, the resilient member 216 may be compressed when the
11572877_1 (GHMatters) P103647.AU
- 11 2014385783 30 Jul 2019 debris deflector 204 is locked in the non-deflecting position 222, whereupon a user press the button 212 on the body 202, the locking means 214 is released and the resilient member 216 is arrange to push the debris deflector 214 out of the body 202.
Similar to the debris deflector 104, accidental damage to the debris deflector 204 may be avoided by retracting and protecting the debris deflector 204 in the body 202 when the power tool 200 is stored or moved.
Preferably, the debris deflector 104 or 204 is elongated with a planar deflecting 10 surface, as shown in Figures 2A, 2B, 3A and 3B. Alternatively the debris deflector is in any other shapes or surfaces such as ruffle surface or bending surface which is operable to perform the debris deflection function.
In some other embodiments, the debris deflector is arranged to direct an air flow 15 generated by the motor to deflect the debris and thus in these embodiments the debris deflector may not necessarily need to make physical contact with the debris, but can, for example, direct air flow to blow away the debris. Preferably, the air flow is an exhaust gas discharged from the motor. Alternatively, the air flow is generated by a fan or discharged from a pipe connected to the source of air flow generated by the 20 motor. In some embodiments, the air flow may be used for cooling the components of the chain saw, especially the motor and the control circuits in the body, the exhaust gas may then be used for blowing the saw dust in certain direction.
Preferably, the debris deflector is adapted to deflect the air flow in a direction 25 substantially away from an operator of the power tool. Alternatively, the debris deflector is adapted to deflect the air flow in a direction substantially transverse to a direction of movement of the operation member. Alternatively, the direction of the air flow can be adjusted to any desirable direction which favors the operation of the power tool. Optionally, the debris deflector is movable between the deflecting 30 position and the non-deflecting position such that the debris deflector is not deflecting the debris generated during operation.
Referring to Figure 4A and 4B, preferably, the debris deflector 304 is pivotedly connected with the body 302, and the debris deflector 304 comprises a door 312
11572877_1 (GHMatters) P103647.AU
- 122014385783 30 Jul 2019 movable between an air directing position 320 in which the air flow is deflected, and an air non-directing position 322 in which the air flow is not deflected, and the door 312 is pivotedly movable between the air directing position 320 and the air nondirecting position 322.
When a user operates the power tool 300 with the debris deflecting function, the user may position the door 312 in an air directing position 320 shown in Figure 4A, such that the debris deflector 304 is arranged to redirect the air generated from the motor, and the redirected air is arrange to direct the debris to a desire direction, which is 10 usually away from the operator of the power tool 300 or transverse to a direction of movement of the operation member of the power tool 300. When the user decides to operate the power tool 300 without the debris deflecting function, the user may position the door 312 in an air non-directing position 322 shown in Figure 4B, and the air flow generated will be discharged without being redirected, and the debris will not 15 be deflected by the debris deflector 304.
Advantageously, the operator of the power tool may decide to operate the power tool with or without the debris deflecting function. For example, in some occasion, when another worker is working adjacent to the operator of the power tool, debris deflected 20 to the worker may be dangerous. In that case, the operator of the power tool may choose to disable the debris deflecting function.
Referring to Figure 5A and 5B, preferably, the debris deflector comprises a door 412 movable between an air directing position 420 in which the air flow is deflected, and 25 an air non-directing position 422 in which the air flow is not deflected, and the door
412 comprises a sliding plate 414 slidably movable between the air directing position
420 and the air non-directing position 422.
When a user operates the power tool 400 with the debris deflecting function, the user 30 may position the sliding plate 414 in an air directing position, such that the door 412 open and the air vents 416 close respectively and the debris deflector 404 is arranged to redirect the air generated from the motor, and the redirected air is arrange to direct the debris to a desire direction, which is usually away from the operator of the power tool 400 or transverse to a direction of movement of the operation member of the
11572877_1 (GHMatters) P103647.AU
- 13 2014385783 30 Jul 2019 power tool 400. When the user decides to operate the power tool 400 without the debris deflecting function, the user may position the sliding plate 414 in an air nondirecting position 420 shown in Figure 5B, such that the door 412 close and the air vents 416 open respectively, and the exhaust air is only discharged from the open air 5 vents 416 and is not redirected by the debris deflector 404, thus the debris are not deflected by the debris deflector 404
Optionally, the debris deflector 404 may comprise a second locking means 430 adapted to lock the door at the air directing position 420 and the air non-directing 10 position 422. Preferably, the second locking means 430 may comprise a resilient member 432. Alternatively or additionally, the second locking means 430 comprises a latch mechanism 434.
In yet another embodiment, with reference to Figure 6A and 6B, the debris deflector 15 504 comprises a door 512, which is movable between an air directing position 520 in which the air flow is deflected, and an air non-directing position 522 in which the air flow is not deflected, and the door 512 is movable from the air non-directing position 522 to the air directing position 520 by means of gravitation force as shown in Figure 6B.
Alternatively, the door 512 is movable from the air non-directing position to the air directing position by the air flow generated by the motor. The door 512 will extend from the body 502 by means of motor discharge wind force, and deflect the wind towards the predetermined direction to blow debris away. The door 512 may be 25 retracted automatically while the power tool 500 is placed on the ground. Optionally, the door 512 may be removed form power tool 500 if the air deflecting function is not needed.
When a user operates the power tool 500 with the air vents 514 on the body 502 30 which discharge the air flow generated by the motor, the door 512 positioned in an air directing position 520 by gravitation force or the force of the air flow generated by the motor, such that the debris deflector 504 is arranged to redirect the air generated from the motor and discharged from a air vents 514 on the body 502, and the redirected air is arrange to direct the debris to a desire direction, which is usually away from the
11572877_1 (GHMatters) P103647.AU
- 142014385783 30 Jul 2019 operator of the power tool 500 or transverse to a direction of movement of the operation member of the power tool 500.
In some embodiments, the debris deflector is removable from the body of the power 5 tool, or may be installed on the chain saw on demand.
In some embodiments, the power tool is a chainsaw. Preferably, the motor of the power tool is powered by electricity, alternatively, the motor is powered by gasoline. Preferably, the motor is an AC motor, alternatively, the motor is a DC motor.
Preferably, the operation member of the power tool comprises a saw blade, alternatively, the operation member may comprise other components for other operations on a workpiece, as long as a person skilled in the art would consider suitable in performing operations on a workpiece.
Advantageously, a power tool such as a chainsaw may include one or more debris deflector in accordance with the embodiments of the present invention. The debris deflector in accordance with the first two embodiments enables the operator of a chainsaw to perform cutting operation without discharging the saw dust towards the operator when the operator is holding the chainsaw at a position in front of the 20 operator. The debris deflector in accordance with the last three embodiments further discharge the saw dust away from the operator in a direction transverse to the cutting direction. The debris deflector effectively protects the operator of a chain saw from injured by the debris discharged during operation.
With reference to Figure 7A, there is shown the deflection path of debris 702 during the operation of a power tool 700 of the present invention when viewed from the front of the power tool 700. In this example, the operator 704 of the chain saw 700 cut a piece of wood 706 in a downward direction 708. The debris 702 is deflected towards the left and hence the operator 704 standing on the right is free from debris 702 generated during the cutting operation. As shown in Figure 7B, the deflected debris 702 are mostly discharged to an area 710 from the top to the top left portion of the image, and the operator 704 of the chainsaw 700 is positioned at the bottom right corner which shows that the operator 704 is free from the debris 702 generated.
11572877_1 (GHMatters) P103647.AU
- 15 2014385783 30 Jul 2019
Without deviating from the spirit of the invention, the power tool can be a chainsaw, a circular saw, a jig saw or any other power tool that may generate saw dust or chips during operation. In some embodiments, the debris deflector can be arranged for deflecting debris other than chips or saw dust. In some other embodiments, a power 5 tool may comprise more than one debris deflectors, or a combination of debris deflectors in accordance with any one of the embodiments of the present invention.
It will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention as shown in the specific embodiments 10 without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.
Any reference to prior art contained herein is not to be taken as an admission that the 15 information is common general knowledge, unless otherwise indicated.
It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.
In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

Claims (16)

  1. Claims
    1. A debris deflecting device for a chain saw, comprising:
    a debris deflector arranged to selectively direct exhaust gas generated by a motor in a body of the chain saw and thereby deflect debris generated by a saw blade during an
    5 operation of the chain saw;
    wherein the debris deflector includes a door movable between an air directing position and an air non-directing position;
    when the door is in the air directing position, the exhaust gas generated by the motor is discharged by an air vent on the body of the chain saw, the exhaust gas is further 10 redirected away from an operator of the chain saw and in an air discharging direction transverse to a cutting direction during the operation of the chain saw, so as to protect the operator by utilizing the exhaust gas to deflect the generated debris towards the air discharging direction; and when the door is in the air non-directing position, the exhaust gas discharged by the 15 air vent is not deflected by the debris deflector.
  2. 2. The debris deflecting device according to claim 1, wherein the debris deflector is elongated with a planar deflecting surface.
    20
  3. 3. The debris deflecting device according to any one of the preceding claims, wherein the debris deflector is pivotedly connected with the body of the chain saw.
  4. 4. The debris deflecting device according to claim 1, wherein the door is pivotedly movable between the air directing position and the air non-directing position.
  5. 5. The debris deflecting device according to claim 1, wherein the door comprises a sliding plate slidably movable between the air directing position and the air nondirecting position.
    30
  6. 6. The debris deflecting device according to claim 5, wherein the door is opened and the air vent is closed when the sliding plate is moved to the air directing position, thereby exhaust gas generated by the motor is redirected to away from the operator of the chain saw.
    11572877_1 (GHMatters) P103647.AU
    - 172014385783 30 Jul 2019
  7. 7. The debris deflecting device according to any one of claims 5 to 6, wherein the debris deflector comprises a locking means adapted to lock the door at the air directing position and the air non-directing position.
    5
  8. 8. The debris deflecting device according to claim 7, wherein the locking means comprises a resilient member.
  9. 9. The debris deflecting device according to any one of claims 7 to 8, wherein the locking means comprises a latch mechanism.
  10. 10. The debris deflecting device according to claim 1, wherein the door is movable from the air non-directing position to the air directing position by means of gravitation force.
    15
  11. 11. The debris deflecting device according to claim 10, wherein the door is movable from the air non-directing position to the air directing position by the air flow generated by the motor.
  12. 12. The debris deflecting device according to claim 11, wherein the door is extended 20 from the body of the chain saw when the exhaust gas generated by the motor is discharged by the air vent such that the door is in the air directing position.
  13. 13. The debris deflecting device according to any one of claims 10 to 12, wherein the door is removable from the chain saw.
  14. 14. The debris deflecting device according to any one of claims 10 to 13, wherein the door is automatically retractable to the air non-directing position when the chain saw is placed on the ground.
    30
  15. 15. The debris deflecting device according any one of claims 1 to 14, wherein the device is removable from the body of the chain saw.
    11572877_1 (GHMatters) P103647.AU
    - 182014385783 30 Jul 2019
  16. 16. A chain saw, comprising a body having a motor arranged to drive a saw blade capable of generating debris during an operation of the chain saw, wherein the body includes the debris deflecting device according to any one of claims 1 to 15.
AU2014385783A 2014-03-04 2014-03-04 A power tool with dust deflector Active AU2014385783B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2019101430A AU2019101430A4 (en) 2014-03-04 2019-11-21 A power tool with dust deflector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/072870 WO2015131337A1 (en) 2014-03-04 2014-03-04 A power tool with dust deflector

Related Child Applications (1)

Application Number Title Priority Date Filing Date
AU2019101430A Division AU2019101430A4 (en) 2014-03-04 2019-11-21 A power tool with dust deflector

Publications (2)

Publication Number Publication Date
AU2014385783A1 AU2014385783A1 (en) 2016-08-04
AU2014385783B2 true AU2014385783B2 (en) 2019-08-29

Family

ID=54054349

Family Applications (2)

Application Number Title Priority Date Filing Date
AU2014385783A Active AU2014385783B2 (en) 2014-03-04 2014-03-04 A power tool with dust deflector
AU2019101430A Expired AU2019101430A4 (en) 2014-03-04 2019-11-21 A power tool with dust deflector

Family Applications After (1)

Application Number Title Priority Date Filing Date
AU2019101430A Expired AU2019101430A4 (en) 2014-03-04 2019-11-21 A power tool with dust deflector

Country Status (3)

Country Link
EP (1) EP3113898B1 (en)
AU (2) AU2014385783B2 (en)
WO (1) WO2015131337A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3659763B1 (en) 2018-11-28 2023-05-31 Black & Decker Inc. Power tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030233924A1 (en) * 2002-06-21 2003-12-25 Pei-Lieh Chiang Belt saw machine with a rotatable cutter shield
US20090249929A1 (en) * 2004-07-16 2009-10-08 Makita Corporation Dust-collecting devices and cutting devices with the dust-collecting devices

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380493A (en) * 1966-07-06 1968-04-30 Joseph H. Giroux Safety guard for chain saw
US4875398A (en) * 1988-01-15 1989-10-24 Atlantic Richfield Company Retractable dust control hood and guard for rotary table saw
DE3841300C1 (en) * 1988-12-08 1989-12-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De Component for covering the space surrounding the saw blade of a jigsaw
CN2608245Y (en) * 2003-05-07 2004-03-31 易图伟 Disk saw safety protective casing
TW200706324A (en) * 2005-08-05 2007-02-16 Yang Wen Jeng Power tool in multipurpose
CN202070822U (en) * 2011-04-28 2011-12-14 赵西敬 Modified middle saw
CN202377613U (en) * 2011-12-22 2012-08-15 于波涛 Electric safety saw blade
CN203254229U (en) * 2013-04-28 2013-10-30 中建七局建筑装饰工程有限公司 Cutting splashing protective cover

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030233924A1 (en) * 2002-06-21 2003-12-25 Pei-Lieh Chiang Belt saw machine with a rotatable cutter shield
US20090249929A1 (en) * 2004-07-16 2009-10-08 Makita Corporation Dust-collecting devices and cutting devices with the dust-collecting devices

Also Published As

Publication number Publication date
EP3113898A4 (en) 2017-11-01
WO2015131337A1 (en) 2015-09-11
AU2019101430A4 (en) 2020-01-02
AU2014385783A1 (en) 2016-08-04
EP3113898B1 (en) 2020-10-21
EP3113898A1 (en) 2017-01-11

Similar Documents

Publication Publication Date Title
US10695937B2 (en) Dust-free multifunctional cutting machine and electric cutter
US6427570B1 (en) Dust collection system for compound miter saw
US5819619A (en) Dust collection system for compound miter saw
US7475482B2 (en) Bevel quadrant and gearbox louver blower system
US11478865B2 (en) Cutting device with integrated and interruptible auxiliary power supply
JPS6345921B2 (en)
TW200714435A (en) Dust collection cover attachable to cutter
AU2019101430A4 (en) A power tool with dust deflector
US20090158904A1 (en) Dust collector for a miter saw
US3706332A (en) Circular saw guard and linkage
US5084971A (en) Sawdust blower attachment for power saws
US7989718B1 (en) Power control engagement device for a power tool
US4614140A (en) Safety device for rocking arm saw
US20180065268A1 (en) Miter saw with improved carrying mode
JP5333836B2 (en) Electric tools and power tools
JP2015116618A (en) Portable work machine
US20220134502A1 (en) Dust collection and debris removal device
US1270430A (en) Tool-guard.
CN203994090U (en) The electric tool with chip air deflector
US20040060719A1 (en) Universal suction attachment for pneumatic power tools
DE60314357D1 (en) planer
DE60301250D1 (en) planer
DE60314356D1 (en) planer
EP2995408A1 (en) Power circular saw
US20060090354A1 (en) Power tool, such as a circular saw

Legal Events

Date Code Title Description
FGA Letters patent sealed or granted (standard patent)