Circular saw apparatus having an integrated multi-stage filtration system

Abstract

A dust collection apparatus is provided that includes a vacuum source, a circular saw blade, and a work table having a central slot axially aligned with the circular saw blade. In one aspect, the central slot (226) includes an air passageway proximate the expected contact point between the circular saw blade (230) and the workpiece, and a vacuum source (212) provides a concentrated negative pressure beneath the worktable (220) through the air passageway. In another aspect, the vacuum source provides negative pressure beneath the worktable at the central slot and includes a multi-stage filter that collects airborne dust drawn by the negative pressure from the area adjacent the central slot. In yet another aspect, the vacuum source is configured to provide a first negative pressure to the central slot beneath the worktable and a second negative pressure through an auxiliary port.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of U.S. Provisional Patent Application No. 62 / 212,372, filed Aug. 31, 2015, entitled "Circular Saw Apparatus Having an Integrated Multi-Stage Filtration System," the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD The present disclosure relates generally to dust collection, and more particularly, to facilitating dust collection within a circular saw apparatus via a multi-stage filtration system. [Background technology]

[0003] The release of airborne dust and particulate matter resulting from cutting a workpiece when using conventional power saws is a problem. Health hazards associated with inhaling such dust through breathing are particularly problematic. The development of wet cutting devices that apply water to the blade cutting edge where the dust is entrained in the fluid and directed into a holding area is one solution to dust removal. Most wet cutting methods work relatively well, but create additional problems such as wastewater pollution and environmental issues. For example, conventional brick and tile cutting machines typically have a water tank or water pan with a pump that supplies water to the cutting head. During sawing, water is sprayed and dispersed around the saw cutting area. Thus, the power saw cannot be positioned near the actual brick and / or tile installation as this water may drip, splash, or spill over. This results in a significant amount of time for the user to travel back and forth between the power saw and the installation area.

[0004] For this reason, a dry-operated power saw that prevents dust from escaping into the environment is desirable. It should be noted that the above-mentioned shortcomings are merely intended to provide a general overview of some of the problems with conventional systems, and that the above-mentioned shortcomings are not intended to be comprehensive. Other problems with the present invention and corresponding benefits of various non-limiting embodiments will become more apparent upon consideration of the following detailed description. Summary of the Invention

[0005] This section provides a simplified summary in order to provide a basic or general understanding of various aspects of the exemplary, non-limiting embodiments that are described in the more detailed description and the accompanying drawings. However, this summary is not intended to be an extensive or comprehensive overview. The sole purpose of this summary is merely to present some concepts related to some exemplary, non-limiting embodiments as a prelude to the more detailed description of the various embodiments that are described below.

[0006] In accordance with one or more embodiments and corresponding disclosures, various non-limiting aspects related to a dust collection system are described. In one aspect, an apparatus for facilitating dust collection is disclosed. In this embodiment, the apparatus includes a vacuum source, a circular saw blade, and a worktable having a central slot axially aligned with the circular saw blade, where the central slot includes an air passageway near an expected point of contact between the circular saw blade and a workpiece. The vacuum source is then configured to provide a focused negative pressure below the worktable via the air passageway.

[0007] Another apparatus for facilitating dust collection is disclosed in a further aspect. In this embodiment, the apparatus includes a housing including a vacuum source and a multi-stage filter. The apparatus further includes a circular saw blade and a work platform including a central slot axially aligned with the circular saw blade. The vacuum source is configured to provide a negative pressure to the central slot below the work platform, and the multi-stage filter is configured to collect airborne dust drawn by the negative pressure from an area proximate to the central slot.

[0008] In yet another aspect, an apparatus for facilitating dust collection is disclosed that includes a vacuum source, a circular saw blade, and a work platform. In this embodiment, the work platform includes a central slot axially aligned with the circular saw blade, and the vacuum source is configured to provide a first negative pressure to the central slot below the work platform. The vacuum source is then further configured to provide a second negative pressure via an auxiliary port.

[0009] Other embodiments and various non-limiting examples, scenarios and implementations are described in more detail below. [Brief description of the drawings]

[0010] Various non-limiting embodiments are further described with reference to the accompanying drawings. [Figure 1] FIG. 1 is a block diagram illustrating an exemplary apparatus according to one embodiment herein that facilitates removal of airborne dust via a multi-stage filtration system. [Diagram 2] FIG. 2 is a first schematic diagram illustrating an exemplary device having an integrated multi-stage filtration system according to an embodiment of the present disclosure. [Diagram 3] FIG. 3 is a second schematic diagram illustrating an exemplary device having an integrated multi-stage filtration system according to an embodiment of the present disclosure. [Figure 4] FIG. 4 is a first schematic diagram illustrating an exemplary apparatus having an integrated multi-stage filtration system and blade guard vacuum inlet according to an embodiment of the present disclosure. [Diagram 5] FIG. 5 is a second schematic diagram illustrating an exemplary apparatus having an integrated multi-stage filtration system and blade guard vacuum inlet according to an embodiment of the present disclosure. [Figure 6] FIG. 6 is a third schematic diagram illustrating an exemplary apparatus having an integrated multi-stage filtration system and blade guard vacuum inlet according to an embodiment of the present disclosure. [Figure 7] FIG. 7 illustrates an exemplary usage time course of an apparatus having an integrated multi-stage filtration system, according to one embodiment of the present disclosure. [Figure 8] FIG. 8 illustrates an exemplary usage time course of an apparatus having an integrated multi-stage filtration system, according to one embodiment of the present disclosure. [Figure 9] FIG. 9 illustrates an exemplary usage time course of a device having an integrated multi-stage filtration system, according to one embodiment of the present disclosure. [Figure 10] FIG. 10 shows a first diagram illustrating an exemplary dust path within an apparatus having an integrated multi-stage filtration system according to an embodiment of the present disclosure. [Figure 11] FIG. 11 shows a second diagram illustrating an exemplary dust path within an apparatus having an integrated multi-stage filtration system according to an embodiment of the present disclosure. [Figure 12] FIG. 12 is a first schematic diagram illustrating an exemplary device with an integrated extension portion according to one embodiment described herein. [Figure 13] FIG. 13 is a second schematic diagram illustrating an exemplary device with an integrated extension according to one embodiment described herein. [Figure 14] FIG. 14 is a first schematic diagram illustrating an example chop saw configuration according to one embodiment described herein. [Figure 15] FIG. 15 is a second schematic diagram illustrating an exemplary chop saw configuration according to an embodiment described herein. [Figure 16] FIG. 16 is a first schematic diagram illustrating an exemplary table saw configuration according to one embodiment described herein. [Figure 17] FIG. 17 is a second schematic diagram illustrating an exemplary table saw configuration according to one embodiment described herein. [Figure 18] FIG. 18 is a side view of an exemplary apparatus for facilitating blade cooling according to an aspect described herein. [Figure 19] FIG. 19 is a top view of an exemplary apparatus for facilitating blade cooling according to an embodiment described herein. [Figure 20] FIG. 20 is a side view of an exemplary apparatus having louvers to facilitate blade cooling according to an aspect described herein. [Figure 21] FIG. 21 illustrates various aspects of an exemplary louver insert according to one embodiment described herein. [Figure 22] FIG. 22 is a schematic diagram of an example blade stabilizer according to one aspect described herein. [Diagram 23] FIG. 23 is a schematic diagram illustrating an exemplary dust tray according to one embodiment described herein. [Figure 24]FIG. 24 is a schematic diagram illustrating an exemplary open dust containment bag on a dust tray according to one embodiment described herein. [Diagram 25] FIG. 25 is a side view illustrating an exemplary open dust containment bag on a dust tray according to one embodiment described herein. [Figure 26] FIG. 26 is a schematic diagram illustrating an exemplary closed dust containment bag on a dust tray according to one embodiment described herein. [Figure 27] FIG. 27 is a schematic diagram illustrating an exemplary removable dust tray inserted into a device having an open dust containment bag according to one embodiment described herein. [Figure 28] FIG. 28 is a schematic diagram illustrating an exemplary removable dust tray inserted into an apparatus having a closed dust containment bag according to one embodiment described herein. [Figure 29] FIG. 29 is a schematic diagram illustrating an exemplary removable dust tray removed from an apparatus according to embodiments described herein. [Diagram 30] FIG. 30 is a schematic diagram illustrating an example bypass path for blade guard dust according to aspects described herein. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Various embodiments disclosed herein relate to dust collection in a circular saw machine via a multi-stage filtration system. FIG. 1 shows a block diagram of an exemplary machine having an integrated multi-stage filtration system according to aspects of the present disclosure. As shown, the machine 100 includes a housing 110, a work platform 120, and a circular saw blade 130, the housing 110 further including a vacuum source 112 and a multi-stage filter 114. As will be described in more detail with reference to the remaining figures below, it is contemplated that the work platform 120 includes a central slot axially aligned with the circular saw blade 130. The vacuum source 112 is then configured to provide a negative pressure to the central slot below the work platform 120 during use, and the multi-stage filter 114 is configured to collect airborne dust drawn by the negative pressure from an area adjacent the central slot.

[0012] Various configurations of the apparatus 100 are contemplated and disclosed herein. For example, in a first possible configuration, the work platform 120 is configured to slide on the housing 110 (see, e.g., FIGS. 2-10). In this particular embodiment, in addition to providing negative pressure to the central slot under the work platform 120, the vacuum source 112 also provides negative pressure to an area within the blade guard of the circular saw blade 130. Here, as shown, the multi-stage filter 114 is configured to collect airborne dust drawn from within the blade guard of the circular saw blade 130 in addition to dust adjacent the central slot of the work platform 120.

[0013] A chop saw configuration of the apparatus 100 is also contemplated (see, e.g., FIGS. 14-15). In this embodiment, the worktable 120 is stationary and a circular saw blade 130 is coupled to a rotatable arm. During use, the rotatable arm is lowered onto a workpiece and dust adjacent a central slot in the worktable 120 is drawn back toward the multi-stage filter 114 by negative pressure provided by the vacuum source 112.

[0014] Another aspect of the disclosure also contemplates a table saw configuration (see, e.g., FIGS. 16-17). In this embodiment, a circular saw blade 130 protrudes from the housing 110 through a central slot in the worktable 120. During use, a workpiece is pressed against the circular saw blade 130 and dust adjacent the central slot in the worktable 120 is drawn back toward the multi-stage filter 114 by negative pressure provided by the vacuum source 112.

[0015] Exemplary Sliding Worktable Embodiments An exemplary embodiment of the sawing device disclosed herein, in which the work platform is a sliding table, will now be described in further detail. For example, in Figs. 2 and 3, first and second schematic views of such a device according to one aspect of the present disclosure are provided, respectively. As shown, the sawing device 200 includes a housing 210 coupled to a work platform 220 and a circular saw blade 230, the work platform 220 being configured to slide over the housing 210 via rails 222. In this embodiment, as shown, the work platform 220 is divided into two halves by a number of louvers 224 strategically spaced apart from each other within a central slot 226 axially aligned with the circular saw blade 230. Furthermore, the circular saw blade 230 is driven by a saw motor 234 and is rigidly secured to the housing 210 via an arm 236. For safety, a blade guard 232 may be provided.

[0016] It is contemplated that the housing 210 may include a multi-stage filter. Here, for example, such a multi-stage filter may include a rotatable filter 217 coupled to a cyclone filter 216. A vacuum source 212 attached to the rotatable filter 217 is configured to create an airflow through the rotatable filter 217 and the cyclone filter 216. When the work platform 220 slides over the housing 210 during use, the airflow provides a negative pressure directly below the central slot 226, causing dust adjacent the central slot 226 to be drawn through the louvers 224 toward the filter and then collected in the dust bin 213.

[0017] It should be noted that in one aspect of the present disclosure, when the louvers 224 are blocked, the suction force under the central slot 226 is reduced. In fact, if a significant number of the louvers 224 are blocked (e.g., by a large workpiece), such blockage can result in insufficient suction force to collect the dust. As a result, the dust will undesirably remain on the work surface 220 rather than being drawn under the central slot 226.

[0018] To avoid this problem, the configurations of Figures 4-6 are contemplated, in which the airflow created by the vacuum source 212 is spread further into the area within the blade guard 232. In particular, one end of the conduit 235 is inserted into the vacuum inlet 233 on the blade guard 232, and the other end of the conduit 235 is connected to the vacuum port 218 on the housing 210. In such an embodiment, if there is insufficient suction under the central slot 226, the dust is then drawn from within the blade guard 232 towards the vacuum inlet 233. In the blade guard, the dust travels through the conduit 235 and then through a filter in the housing 210.

[0019] Next, referring to FIGS. 7-9, these figures illustrate the time progression of an exemplary use of apparatus 200 according to aspects of this specification. In particular, FIG. 7 shows a cross-section of apparatus 200 at t = t0, FIG. 8 shows a cross-section of apparatus 200 at t = t1, and FIG. 9 shows a cross-section of apparatus 200 at t = t2. Here, t0 < t1 < t2. As shown, at t = t0, block 270 is placed on worktable 220 away from circular saw blade 230. At t = t1, worktable 220 moves towards circular saw blade 230, thereby generating dust when block 270 contacts circular saw blade 230. Here, circular saw blade 230 rotates counterclockwise, and a vacuum source 212 (not shown) creates a negative pressure under worktable 220, so that the trajectory of the dust is substantially downward. As worktable 220 continues to slide further towards circular saw blade 230, dust is collected at that time through a particular set of louvers 234 on heavy debris chute 215. For example, as shown, the dust passes through the first set of louvers 234 at t = t1 and through the second set of louvers 234 at t = t2.

[0020] Note that specific parameters of apparatus 200 can be changed as needed to provide various performance characteristics and / or cut various types of workpieces (e.g., different materials, different dimensions, etc.). For example, as shown, heavy debris chute 215 and each louver 234 are angled to prevent dust particles from "bouncing back" through louver 234. However, in certain embodiments, louver 234 may be connected to a lever, and that lever can uniformly adjust louver 234 to an angle within a particular range (e.g., between 30° and 45°). Also, various other parameters can be adjusted, including, for example, the spacing between each of louvers 234, the revolutions per minute (RPM) of circular saw blade 230, and / or the suction force provided by vacuum source 212.

[0021] As previously mentioned, embodiments disclosed herein provide a system for collecting dust through any of a number of filters, where, for example, exemplary paths traveled by dust drawn through louvers 234 are provided in Figures 8-11. As shown, heavy debris drawn through louvers 234 falls through heavy debris chute 215 into heavy debris section 240, while lighter dust particles are pulled towards cyclone filter 216. As these lighter dust particles progress above cyclone filter 216, some dust is drawn into cyclone particle section 250, while finer dust particles continue towards rotatable filter 217.

[0022] As shown, in certain embodiments, the rotatable filter 217 is a cylindrical filter media having a plurality of pleats about a cylindrical surface. The rotatable filter 217 further includes a filter cleaning flap 218 secured to a side partition wall inside the rotatable filter 217, the filter cleaning flap 218 contacting the pleats as the filter cleaning knob rotates. Furthermore, as the rotatable filter 217 rotates, the filter cleaning flap 218 removes dust from the pleats, which then falls into the fine particle section 260.

[0023] As shown, dust can also be drawn in through vacuum inlet 233. As previously mentioned, a first end of a conduit 235 can be inserted into vacuum inlet 233 while the other end of the conduit 235 can be connected to vacuum port 218 on housing 210. If there is insufficient suction under central slot 226, dust will be drawn up towards vacuum inlet 233 and then through conduit 235 and subsequently through a filter in housing 210.

[0024] Another aspect of the present disclosure contemplates aspects that minimize loss of vacuum flow. For example, as shown in Figures 12 and 13, the device 200 may be configured with extensions 219 along the air flow path. In such an embodiment, the extensions 219 may be located at each end of the dust collection slot and communicate with the louvers 224. As the work platform 220 slides toward the circular saw blade 230, these extensions 219 plug off the leading set of louvers 224, minimizing vacuum flow loss beneath the work platform 220.

[0025] Exemplary Chop Saw Embodiments 14 and 15, there is shown a schematic diagram of a chop saw configuration according to aspects disclosed herein. As shown, chop saw device 300 includes a housing 310 coupled to a work platform 320, and a circular saw blade 330, which is configured as a stationary table on the housing 310. As shown, in this embodiment, similar to the work platform 220 of device 200, the work platform 320 includes a central slot 326 that is axially aligned with the circular saw blade 330. However, the circular saw blade 330 is attached to a rotating arm 336, and a handle 331 on a blade guard 332 is used to raise and lower the circular saw blade 330 during use.

[0026] With respect to the housing 310 of the device 300, it will be appreciated that the components therein are substantially similar to the corresponding components of the housing 210 of the device 200. For example, the housing 310 includes a multi-stage filter having a rotatable filter 317 coupled to a cyclone filter 316, and a vacuum source 312 attached to the rotatable filter 317 is also configured to create an airflow through the rotatable filter 317 and the cyclone filter 316. In use, this airflow provides a negative pressure directly below the central slot 326 such that dust is drawn through the central slot 326 towards the filter and subsequently collected in the dust bin 313. In particular, heavier debris is drawn through the central slot 326 and falls through the heavy debris chute 315 into the dust bin 313, while lighter dust particles are pulled towards the cyclone filter 316. As these lighter dust particles travel above the cyclone filter 316 , some of the dust is pulled into the dust bin 313 while the finer dust particles continue towards the rotatable filter 317 .

[0027] However, in addition to pulling dust through the central slot 326, the device 300 is configured to pull dust back towards the scoop 323 as shown. Thus, the vacuum source 312 provides suction through both the central slot 326 and the scoop 323. Thus, dust drawn through the scoop 323 proceeds through the vacuum port 318 to the filter. It should be appreciated that the scoop 323 may be comprised of a brush or finger-like material. As shown, a fence 321 may be included.

[0028] Exemplary Table Saw Embodiments 16 and 17, a schematic diagram of a table saw configuration according to aspects disclosed herein is provided. As shown, the table saw apparatus 400 includes a housing 410 coupled to a work platform 420 and a circular saw blade 430 configured as a stationary platform on the housing 410. In this embodiment, similar to the work platform 220 of the apparatus 200, the work platform 420 includes a central slot 426 axially aligned with the circular saw blade 430 as shown. However, the circular saw blade 430 protrudes through the central slot 426 of the work platform 420. Additionally, the circular saw blade 430 and saw motor 434 are housed within a blade housing 432 beneath the work platform 420, which is substantially within the housing 410.

[0029] It should be noted that with respect to the remaining components of the housing 410, these components are substantially the same as the corresponding components of the housing 210 of the device 200. For example, the housing 410 further comprises a multi-stage filter, which comprises a rotatable filter 417 coupled to a cyclone filter 416, and a vacuum source 412 attached to the rotatable filter 417 is again configured to generate an airflow through the rotatable filter 417 and the cyclone filter 416. In use, this airflow provides a negative pressure directly below the central slot 426, causing dust to be drawn through the central slot 426 into the filter and then collected in the dust bin 413. In particular, heavy debris drawn through the central slot 426 falls through the heavy debris chute 415 into the dust bin 413, while lighter dust particles are pulled towards the cyclone filter 416. As these lighter dust particles travel over the cyclone filter 416 , some of the dust is drawn into the dust bin 413 while the finer dust particles continue straight onto the rotatable filter 417 .

[0030] Exemplary Blade Cooling Aspects 18-22, which illustrate various blade cooling aspects disclosed herein. Thus, it is self-evident that cooling the circular saw blade during "dry cut" applications is particularly desirable to achieve optimal performance and reduce the likelihood of blade damage. Side and top views of an exemplary apparatus for facilitating blade cooling according to aspects described herein are shown in FIGS. 18 and 19, respectively. It should also be understood that the apparatus 500 is substantially similar to the apparatuses 100, 200, 300, and 400 described above, and that the individual components of the apparatus 500 are substantially similar to the individual components of the apparatuses 100, 200, 300, and 400. As shown, the apparatus 500 includes a vacuum source 512, a circular saw blade 530, and a worktable 520, which includes a central slot 526 axially aligned with the circular saw blade 530. Here, the central slot 526 provides an air passage 527 near the expected contact point 532 between the circular saw blade 530 and the workpiece 570. The vacuum source 512 is therefore configured to provide a concentrated negative pressure 528 beneath the worktable 520 via this air passage 527.

[0031] It has been found that proper alignment of the air passages 527 with the anticipated contact points 532 between the circular saw blade 530 and the workpiece 570 significantly cools the circular saw blade 530. That is, because the circular saw blade 530 can become very hot at the anticipated contact points 532 during use, it is particularly desirable to utilize the concentrated negative pressure 528 to cool the circular saw blade 530 at the anticipated contact points 532.

[0032] In embodiments where a sliding worktable is used, other configurations are contemplated. FIG. 20 shows a side view of an exemplary apparatus having a sliding worktable utilizing louvers to facilitate blade cooling. Here, the apparatus 600 is substantially similar to the apparatus 200 described above, and the individual components of the apparatus 600 are also substantially similar to the individual components of the apparatus 200. As shown, the apparatus 600 includes a vacuum source 612, a circular saw blade 630, and a worktable 620, which includes a central slot 626 axially aligned with the circular saw blade 630. Here, the central slot 626 includes an air passage 627 proximate to an expected contact point 632 between the circular saw blade 630 and a workpiece 670. Thus, the vacuum source 612 is configured to provide a concentrated negative pressure 628 under the worktable 620 via the air passage 627.

[0033] However, in this particular embodiment, the work platform 620 is configured to slide toward the circular saw blade 630, and the central slot 626 includes a number of louvers 624 that separately define air passages 627. Furthermore, as the work platform 620 slides toward the circular saw blade 630, the air passages 627 change sequentially depending on which of the number of louvers 624 is closest to the anticipated contact point 632.

[0034] In one embodiment of the present disclosure, the magnitude of the concentrated negative pressure 628 is inversely proportional to the opening size of the air passages 627. Thus, by reducing the gap between the individual louvers 624, the concentrated negative pressure 628 is increased. To achieve this, removable louver inserts of various sizes may be used. For example, FIG. 21 illustrates various embodiments of an exemplary louver insert according to an embodiment of the present disclosure. By placing an insert 680 on the louvers 624, as shown at 700, the gap 625 between the louvers 624 is reduced. That is, as shown, the insert gap width is smaller than the louver gap width.

[0035] Further, numbers 710 and 720 illustrate this reduction in gap size, with number 710 illustrating work surface 620 without insert 680, while number 720 illustrates work surface 620 with insert 680. As shown, the use of insert 680 reduces the size of gap 625, as well as the particular gap corresponding to air flow passage 627. Thus, the concentrated negative pressure 628 at air flow passage 627 at 720 is greater than the concentrated negative pressure 628 at air flow passage 627 at 710.

[0036] In a further aspect of the present disclosure, it has been found that the circular saw blade is more likely to overheat if it is unstable. Thus, various aspects are contemplated to minimize wobble during use and stabilize the circular saw blade. In a particularly contemplated aspect, a blade stabilizing roller is coupled to the circular saw blade, as shown in FIG. 22. In such an embodiment, as shown, the circular saw blade 830 is housed within a blade guard 832 and is coupled to an arbor shaft 830 and a blade stabilizing roller 835. During use, the arbor shaft 830 begins to rotate, which rotates the circular saw blade 830. When the circular saw blade 830 comes into contact with a workpiece, the blade stabilizing roller 835 aligns and holds the circular saw blade 830 securely so that the blade continues to rotate. Thus, the circular saw blade 830 is more stable and less susceptible to wobble, and therefore the circular saw blade 830 is less likely to overheat.

[0037] Exemplary Multi-Stage Filter Embodiments As discussed above, various aspects of using a multi-stage filter, such as the previous apparatus 200, are contemplated. In a particular embodiment, an apparatus is disclosed that includes a housing that includes a vacuum source and a multi-stage filter. The apparatus further includes a circular saw blade and a work platform that includes a central slot axially aligned with the circular saw blade. Here, the vacuum source is configured to provide a negative pressure under the central slot of the work platform, and the multi-stage filter is configured to collect airborne dust drawn by the negative pressure from an area proximate the central slot.

[0038] In some countries, it is difficult to actually remove dust from the device disclosed herein. Therefore, various embodiments of removable special dust trays are contemplated, as shown in Figures 23-26, and are shown in Figures 27-29 within the device 200. As shown, a removable dust tray 900 can be positioned below the multi-stage filter, the removable dust tray 900 comprising a number of separate compartments 910, 920 and 930, with each stage of the multi-stage filter having a corresponding compartment within the removable dust tray 900 (e.g., below the fine particle compartment 260, the cyclone particle compartment 250 and the heavy debris compartment 260). As shown, the removable dust tray 900 may be further configured to accommodate at least one dust containment bag 1000 with a drawstring 1010 and a washer 1020. By pulling the drawstring 1010 while the removable dust tray 900 is inserted within the device 200, the user can seal in any collected dust before removing the removable dust tray 900 from the device 200.

[0039] Exemplary Auxiliary Port Aspects As noted above, various aspects of utilizing an auxiliary port, such as the previously described apparatus 200, are contemplated. A particular embodiment discloses an apparatus including a vacuum source, a circular saw blade, and a work table. In this embodiment, the work table includes a central slot axially aligned with the circular saw blade, and the vacuum source is configured to provide a first negative pressure under the central slot of the work table. Additionally, the vacuum source is configured to provide a second negative pressure via the auxiliary port.

[0040] In some configurations, it is desirable to divert dust through different dust paths. For example, FIG. 30 is a schematic diagram of an example blade guard dust diversion path according to an embodiment described herein. Here, three cyclone filters 1116 are for receiving dust collected in the central slot 1126, while a fourth cyclone filter 1117 is for collecting dust at the top from the blade guard 1132 through the support arm 1136. This provides a constant vacuum to the back of the blades as needed.

[0041] As used herein, the term "exemplary" is used for example, instance, or illustrative purposes. With the exception of doubt, the subject matter disclosed herein is not limited to such examples. Moreover, any aspect or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects or designs, and does not exclude equivalent exemplary structures and techniques known to those skilled in the art. Moreover, to the extent that the terms "comprise," "have," "include," and other similar terms are used in either the detailed description or the claims, with the exception of doubt, such terms are intended to be synonymous with and inclusive of the term "comprise" as an open transition word, without excluding any additional or other elements.

[0042] The above-mentioned system is a description of the interaction between several components. It should be understood that such systems and components can include these components or specific subcomponents, several specific components or subcomponents and / or additional components, subject to various modifications and combinations of the above. Subcomponents are also available as components that are not included within a parent component but are combined with another component (hierarchical). It should be noted further that one or more components can be incorporated into a single component that provides an aggregate function, or split into several separate subcomponents, and further provide any one or more intermediate layers that are coupled to the subcomponents to provide the aggregate function. Any component described herein can also interact with one or more other components not specifically described herein but generally known to those skilled in the art.

[0043] In view of the exemplary systems described above, methodologies that may be implemented in accordance with the disclosed subject matter can be understood with reference to the various figures. For ease of explanation, the methodologies are described as a series of steps, however, it should be understood that the disclosed subject matter is not limited to the order of the steps, and that some steps may occur in a different order and / or simultaneously with other steps described herein. Furthermore, not all disclosed steps are required to implement the methods described below.

[0044] Although various embodiments have been described in connection with the exemplary embodiments in the various figures, it should be understood that other similar embodiments may be used and that modifications and additions may be made to the disclosed embodiments to perform the same function without departing from there. Thus, the present invention should not be limited to any single embodiment.

Claims

[Claim 1] In the saw device, A vacuum source; Multiple filters and Circular saw blade and a worktable having a central slot axially aligned with the circular saw blade; the vacuum source is configured to provide a first negative pressure in the central slot beneath the worktable and a second negative pressure within a blade guard of the circular saw blade via an auxiliary port; The plurality of filters are configured to collect airborne dust sucked by the first negative pressure and the second negative pressure; The floating dust sucked by the first negative pressure and the second negative pressure includes a first floating dust captured by a first filter which is a cyclone filter provided separately from the vacuum source among the plurality of filters, and a second floating dust captured by a second filter which is a cyclone filter provided separately from the vacuum source among the plurality of filters, The first suspended dust is different from the second suspended dust, the auxiliary port is disposed on a blade guard of the circular saw blade, and dust suspended within the blade guard is drawn toward the auxiliary port by the second negative pressure; A saw apparatus, characterized in that airborne dust collected by the first negative pressure in a central slot under the work table is sent to a first filter dedicated to airborne dust collected by the first negative pressure, and airborne dust in the blade guard is directed to a second filter dedicated to airborne dust collected by the second negative pressure.

Images