Circular saw apparatus with integrated multistage filtration system

Abstract

To disclose various dust collection apparatuses, which include a vacuum source, a circular saw blade, and a worktable comprising a center slot axially aligned to the circular saw blade.SOLUTION: In a first aspect, the center slot 226 includes an air flow channel proximate to an anticipated point of contact between the circular saw blade 230 and a workpiece, and the vacuum source is configured to provide a focused negative pressure beneath the worktable 220 via the air flow channel. In another aspect, the vacuum source provides a negative pressure beneath the worktable at the center slot, and a multistage filter is included to collect airborne dust drawn by the negative pressure from an area proximate to the center slot. In yet another aspect, the vacuum source is configured to provide a first negative pressure beneath the worktable at the center slot, and a second negative pressure via an auxiliary port.SELECTED DRAWING: Figure 2

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 on August 31, 2015, entitled "Circular Saw Apparatus with Integrated Multi - Stage Filtration System", the entire content of which is incorporated herein by reference.

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

Background Art

[0003] The release of airborne dust and particulate matter resulting from the cutting of workpieces when using conventional power saws is a problem. Health hazards associated with the inhalation of such dust during breathing are particularly problematic. The development of wet cutting devices that apply water to the blade cutting edge where the dust is taken into the fluid and directed towards a holding area is one solution to dust removal. Most wet cutting methods function relatively well, but they cause additional problems such as pollution by wastewater and environmental issues. For example, conventional brick and tile cutters typically have a water tank or water pan with a pump that supplies water to the cutting head. While cutting with the saw, water is sprinkled and dispersed around the saw cutting area. Therefore, this water can drip, bounce back, or overflow, so the power saw cannot be placed near the area where the bricks and / or tiles are actually installed. As a result, the user will spend a significant amount of time traveling between the power saw and the installation area.

[0004] Therefore, a dry - operated power saw that prevents dust from leaking into the environment is desirable. It should be noted that the above - mentioned drawbacks are merely for presenting an overview of some problems of the conventional system, and it is not intended that the above - mentioned drawbacks be comprehensive. Other problems in the current situation and the corresponding benefits of various non - limiting embodiments will become more apparent by considering the following detailed description.

SUMMARY OF THE INVENTION

[0005] Here, a simplified overview is provided for a basic or general understanding of various aspects of the exemplary and non-limiting embodiments described in more detail and in the accompanying drawings. However, this overview is not intended to be a broad or comprehensive overview. The sole purpose of this overview is simply to present some concepts related to some exemplary and non-limiting embodiments as a prelude to the more detailed description of the various embodiments described below.

[0006] According to one or more embodiments and corresponding disclosures, various non-limiting aspects related to a dust collection system are described. In one aspect thereof, an apparatus for facilitating dust collection is disclosed. In this embodiment, the apparatus comprises a vacuum source, a circular saw blade, and a workbench having a central slot axially aligned with the circular saw blade. Here, the central slot has an air flow path in the vicinity of the expected contact point between the circular saw blade and the workpiece. The vacuum source is then configured to provide a concentrated negative pressure under the workbench via the air flow path.

[0007] Another apparatus for facilitating dust collection is disclosed in a further aspect. In this embodiment, the apparatus comprises a housing having a vacuum source and a multi-stage filter. The apparatus further comprises a circular saw blade and a workbench having a central slot axially aligned with the circular saw blade. Here, the vacuum source is configured to provide a negative pressure to the central slot under the workbench, and the multi-stage filter is configured to collect floating dust drawn in by this negative pressure from a region close to the central slot.

[0008] In yet another aspect, an apparatus for facilitating dust collection is disclosed, which comprises a vacuum source, a circular saw blade, and a workbench. In this embodiment, the workbench has 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 under the workbench. 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 implementation examples will be described in more detail below.

Brief Description of the Drawings

[0010] Various non-limiting embodiments will be further described with reference to the accompanying drawings.

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DETAILED DESCRIPTION OF THE INVENTION

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

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

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

[0014] In another aspect of the present disclosure, the configuration of the table saw is also considered (see, for example, FIGS. 16-17). In this embodiment, the circular saw blade 130 projects through the central slot of the workbench 120 from the housing 110. During use, the workpiece is pressed against the circular saw blade 130, and the dust near the central slot of the workbench 120 is drawn back towards the multi-stage filter 114 by the negative pressure supplied by the vacuum source 112.

[0015] 〔Exemplary Embodiment of a Sliding Workbench〕 An exemplary embodiment of the saw apparatus disclosed herein, where the workbench is a sliding table, will be described in more detail. For example, in FIGS. 2 and 3, first and second schematic views of such an apparatus according to one aspect of the present disclosure are presented respectively. As shown, the saw apparatus 200 includes a housing 210 connected to a workbench 220 and a circular saw blade 230, and the workbench 220 is configured to slide on top of the housing 210 via rails 222. In this embodiment, as shown, the workbench 220 is divided into two by a plurality of louvers 224 strategically spaced apart from each other within a central slot 226 axially aligned with the circular saw blade 230. Further, the circular saw blade 230 is driven by a saw motor 234 and is firmly fixed to the housing 210 via an arm 236. For safety, a blade guard 232 may be provided.

[0016] Regarding the housing 210, it is conceivable to include a multi-stage filter. Here, for example, such a multi-stage filter can include a rotatable filter 217 connected to a cyclone filter 216. A vacuum source 212 attached to the rotatable filter 217 is configured to create an air flow through the rotatable filter 217 and the cyclone filter 216. When the workbench 220 slides on top of the housing 210 during use, this air flow provides a negative pressure directly below the central slot 226, and the dust near the central slot 226 is drawn towards the filter through the louvers 224 and then collected in the dust container 213.

[0017] Note that in one aspect of the present disclosure, when the louvers 224 are blocked, the suction force below the central slot 226 decreases. In fact, when a significant number of louvers 224 are blocked (e.g., by a large workpiece), such blockage will result in insufficient suction force to collect dust. As a result, instead of being drawn under the central slot 226, the dust preferably remains on the workbench 220, which is not desirable.

[0018] To avoid this problem, the configurations of FIGS. 4-6 are considered, where the air flow created by the vacuum source 212 further spreads into the region 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, when the suction force below the central slot 226 is insufficient, 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 passes through the filter within the housing 210.

[0019] Next, referring to FIGS. 7 - 9, these figures show the time progression of an exemplary use of apparatus 200 according to aspects of the present 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 workbench 220 away from circular saw blade 230. At t = t1, workbench 220 moves towards circular saw blade 230, thereby generating dust when block 270 contacts circular saw blade 230. Here, circular saw blade 230 rotates counter - clockwise, and a vacuum source 212 (not shown) creates a negative pressure under workbench 220, so that the trajectory of the dust is substantially downward. As workbench 220 continues to slide further towards circular saw blade 230, dust is collected through a specific 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 that can uniformly adjust louver 234 to an angle within a specific 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 described above, the aspects disclosed herein provide a system for collecting dust through any of a plurality of filters. Here, for example, exemplary paths through which dust drawn through the louver 234 moves are provided in FIGS. 8 through 11. As shown, heavy debris drawn through the louver 234 falls into the heavy debris section 240 through the heavy debris chute 215, while light dust particles are pulled towards the cyclone filter 216. Since these light dust particles travel above the cyclone filter 216, some dust is drawn into the cyclone particle section 250, while the fine dust particles continue to move towards the rotatable filter 217.

[0022] As shown, in certain embodiments, the rotatable filter 217 is a cylindrical filter medium having a plurality of pleats around a cylindrical surface. The rotatable filter 217 further includes a filter cleaning flap 218 fixed to a side partition wall inside the rotatable filter 217, and this filter cleaning flap 218 contacts the pleats when the filter cleaning knob rotates. Further, when the rotatable filter 217 rotates, the filter cleaning flap 218 removes dust from the pleats, and the removed dust falls into the fine particle section 260.

[0023] As shown, dust can also be drawn in through the vacuum inlet 233. As described above, the first end of the conduit 235 can be inserted into the vacuum inlet 233, while the other end of the conduit 235 can be connected to the vacuum port 218 on the housing 210. If the suction force below the central slot 226 is insufficient, the dust is drawn up towards the vacuum inlet 233, then passes through the conduit 235, and subsequently through the filter within the housing 210.

[0024] In another aspect of the present disclosure, aspects of minimizing losses in the flow of vacuum are contemplated. For example, as shown in FIGS. 12 and 13, the apparatus 200 may be configured to include an extension 219 along the air flow path. In such an embodiment, the extensions 219 are disposed at each end of the dust collection slot and can communicate with the louvers 224. As the workbench 220 slides towards the circular saw blade 230, these extensions 219 plug off the leading set of louvers 224, minimizing the vacuum flow loss under the workbench 220.

[0025] 〔Exemplary Chop Saw Embodiment〕 Referring now to FIGS. 14 and 15, a schematic view of a chop saw configuration according to the aspects disclosed herein is shown. As illustrated, the chop saw apparatus 300 includes a housing 310 coupled to a workbench 320 and a circular saw blade 330, and the workbench 320 is configured as a stationary table on the housing 310. As shown, in this embodiment, similar to the workbench 220 of the apparatus 200, the workbench 320 includes a central slot 326 axially aligned with the circular saw blade 330. However, the circular saw blade 330 is attached to a rotating arm 336 and is raised and lowered during use using a handle 331 on the blade guard 332.

[0026] Regarding the housing 310 of the device 300, it is obvious that the components therein are substantially the same as 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 connected to a cyclone filter 316, and a vacuum source 312 attached to the rotatable filter 317 is also configured to create an air flow through the rotatable filter 317 and the cyclone filter 316. During use, this air flow provides a negative pressure directly below the central slot 326 such that dust is drawn towards the filter through the central slot 326 and subsequently collected in the dust container 313. In particular, heavy debris is drawn through the central slot 326 and falls into the dust container 313 through the heavy debris chute 315, while lighter dust particles are drawn towards the cyclone filter 316. As these lighter dust particles move above the cyclone filter 316, some dust is drawn into the dust container 313, while finer dust particles continue to move towards the rotatable filter 317.

[0027] However, in addition to drawing dust through the central slot 326, the device 300 is configured to draw the dust back towards the scoop 323 as shown. Thus, the vacuum source 312 provides a suction force through both the central slot 326 and the scoop 323. For this reason, the dust drawn through the scoop 323 proceeds to the filter through the vacuum port 318. Here, it is obvious that the scoop 323 may be composed of a brush or finger-like material. As shown, it may include a fence 321.

[0028] 〔Exemplary Table Saw Embodiment〕 Next, referring to FIGS. 16 and 17, a schematic view of the configuration of a table saw according to the aspects disclosed herein is provided. As shown, the table saw apparatus 400 includes a housing 410 coupled to a workbench 420 and a circular saw blade 430, and this workbench 420 is configured as a stationary table on the housing 410. In this embodiment, similar to the workbench 220 of the apparatus 200, the workbench 420 has a central slot 426 axially aligned with the circular saw blade 430, as shown. However, the circular saw blade 430 projects through the central slot 426 of the workbench 420. Further, the circular saw blade 430 and the saw motor 434 are housed within a blade housing 432 below the workbench 420, and the blade housing 432 is substantially within the housing 410.

[0029] Regarding the remaining components of the housing 410, these components are substantially the same as the corresponding components of the housing 210 of the apparatus 200. For example, the housing 410 further includes a multi-stage filter, and this multi-stage filter includes a rotatable filter 417 coupled to a cyclone filter 416. The vacuum source 412 attached to the rotatable filter 417 is also configured to generate an air flow through the rotatable filter 417 and the cyclone filter 416. In use, this air flow provides a negative pressure directly below the central slot 426, and dust is drawn through the central slot 426 into the filter and then collected in the dust container 413. In particular, heavy debris drawn through the central slot 426 falls into the dust container 413 through the heavy debris chute 415. On the other hand, lighter dust particles are pulled towards the cyclone filter 416. As these lighter dust particles move over the cyclone filter 416, some dust is drawn into the dust container 413, and the finer dust particles continue towards the rotatable filter 417.

[0030] 〔Exemplary Modes of Blade Cooling〕 Next, referring to FIGS. 18 through 22, these show various blade cooling aspects disclosed herein. For this reason, it is self-evident that cooling the circular saw blade while using a "dry cut" is particularly desirable to achieve optimal performance and reduce the likelihood of blade damage. A side view and a plan view of an exemplary apparatus facilitating blade cooling according to the aspects described herein are shown in FIGS. 18 and 19, respectively. Also, it should be understood that apparatus 500 is substantially the same as apparatuses 100, 200, 300, and 400 described above, and the individual components of apparatus 500 are substantially the same as the individual components of apparatuses 100, 200, 300, and 400. As shown, apparatus 500 includes a vacuum source 512, a circular saw blade 530, and a workbench 520, and this workbench 520 has a central slot 526 axially aligned with the circular saw blade 530. Here, the central slot 526 has an air flow path 527 in the vicinity of the expected contact point 532 between the circular saw blade 530 and the workpiece 570. Accordingly, the vacuum source 512 is configured to provide a concentrated negative pressure 528 under the workbench 520 via this air flow path 527.

[0031] By appropriately aligning the expected contact point 532 between the circular saw blade 530 and the workpiece 570 with the air flow path 527, it has been found that the circular saw blade 530 is significantly cooled. That is, since the circular saw blade 530 can get very hot at the expected contact point 532 during use, it is particularly desirable to utilize the concentrated negative pressure 528 to cool the circular saw blade 530 at the expected contact point 532.

[0032] In an embodiment where a sliding workbench is used, other configurations are conceivable. FIG. 20 shows a side view of an exemplary apparatus having a sliding workbench that facilitates blade cooling using louvers. Here, apparatus 600 is substantially the same as apparatus 200 described above, and the individual components of apparatus 600 are also substantially the same as the individual components of apparatus 200. As shown, apparatus 600 includes a vacuum source 612, a circular saw blade 630, and a workbench 620, and this workbench 620 has a central slot 626 that is axially aligned with the circular saw blade 630. Here, the central slot 626 has an air flow path 627 in the vicinity of the expected contact point 632 between the circular saw blade 630 and the workpiece 670. Accordingly, the vacuum source 612 is configured to provide a negative pressure 628 concentrated under the workbench 620 via the air flow path 627.

[0033] However, in this particular embodiment, the workbench 620 is configured to slide toward the circular saw blade 630, and the central slot 626 has a plurality of louvers 624 that separately form the air flow path 627. Further, as the workbench 620 slides toward the circular saw blade 630, the air flow path 627 changes sequentially depending on which of the plurality of louvers 624 is close to the expected contact point 632.

[0034] In one aspect of the present disclosure, the magnitude of the concentrated negative pressure 628 is inversely proportional to the opening size of the air flow path 627. Accordingly, by reducing the gap between the individual louvers 624, the concentrated negative pressure 628 increases. To switch this magnitude, it is conceivable to use removable louver inserts of various sizes. For example, FIG. 21 shows various aspects of an exemplary louver insert according to the aspects of this specification. As indicated by reference numeral 700, by disposing the insert 680 on the louvers 624, the gap 625 between the louvers 624 becomes smaller. That is, as shown, the insert gap width is smaller than the louver gap width.

[0035] Furthermore, reference numerals 710 and 720 indicate the reduction of this gap size, where reference numeral 710 shows the workbench 620 without the insert 680, while reference numeral 720 shows the workbench 620 with the insert 680. As shown, by using the insert 680, in addition to reducing the size of the gap 625, a specific gap corresponding to the air flow path 627 also becomes smaller. Therefore, the concentrated negative pressure 628 in the air flow path 627 at reference numeral 720 is greater than the concentrated negative pressure 628 in the air flow path 627 at reference numeral 710.

[0036] In a further aspect of the present disclosure, it has been found that a circular saw blade is more likely to be unstable and overheat. Therefore, various aspects of stabilizing the circular saw blade to minimize wobbling during use are conceivable. In a particularly conceivable aspect, as shown in FIG. 22, a blade stabilizing roller is connected to the circular saw blade. In such an embodiment, as shown, the circular saw blade 830 is housed within a blade guard 832 and is connected to an arbor shaft 830 and a blade stabilizing roller 835. During use, the arbor shaft 830 begins to rotate, thereby causing the circular saw blade 830 to rotate. When the circular saw blade 830 contacts the workpiece, the blade stabilizing roller 835 aligns and firmly holds the circular saw blade 830 so that the blade continues to rotate as it is. Therefore, the circular saw blade 830 becomes more stable and less susceptible to the effects of wobbling, so the circular saw blade 830 is less likely to overheat.

[0037] 〔Exemplary multi-stage filter embodiments〕 As described above, various aspects of using a multi-stage filter, such as the previous device 200, are conceivable. In a particular embodiment, a device is disclosed that includes a housing with a vacuum source and a multi-stage filter. This device further includes a circular saw blade and a workbench having 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 workbench, and the multi-stage filter is configured to collect floating dust drawn in by the negative pressure from a region near the central slot.

[0038] In some countries, it is difficult to actually remove dust from the devices disclosed in this specification. Therefore, as shown in FIGS. 23 to 26, various removable and special dust trays are conceivable, and FIGS. 27 to 29 show this dust within the device 200. As shown, the removable dust tray 900 can be placed under the multi-stage filter, and the removable dust tray 900 includes a plurality of individual compartments 910, 920, and 930, and each stage of the multi-stage filter has a corresponding compartment within the removable dust tray 900 (e.g., under the fine particle compartment 260, the cyclone particle compartment 250, and the heavy debris compartment 260). As shown, the removable dust tray 900 may further be 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, all of the collected dust can be sealed before the user removes the removable dust tray 900 from the device 200.

[0039] 〔Exemplary Auxiliary Port Aspects〕 As described above, various aspects of utilizing an auxiliary port, such as the aforementioned device 200, are conceivable. A particular embodiment discloses a device having a vacuum source, a circular saw blade, and a workbench. In this embodiment, the workbench 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 workbench. Further, 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 exemplary diversion path for blade guard dust according to the aspects described herein. Here, three cyclone filters 1116 are for receiving the dust collected at the central slot 1126, while a fourth cyclone filter 1117 is for collecting the dust at the top through the support arm 1136 from the blade guard 1132. This supplies a constant vacuum to the back of the blade as needed.

[0041] As used herein, the term "exemplary" is used for purposes of example, instance, or illustration. Without doubt, the content disclosed herein is not limited to such examples. Further, any aspect or design described as "exemplary" herein is not necessarily to be construed as preferred or advantageous over other aspects or designs, nor does it exclude equivalent exemplary structures and techniques known to those skilled in the art. Further, as long as the terms "comprise," "have," "include," and other similar terms are used in either the detailed description or the claims, without doubt, such terms are the same as the term "comprise" as an open transitional word and are intended to be inclusive without excluding any additional elements or other elements.

[0042] The above system is an explanation of the interaction between several components. It should be understood that such a system and components can include these components or specific subordinate components, several specific components or subordinate components and / or additional components, and follow the various changes and combinations described above. Subordinate components can be used as components coupled to another component rather than being included within the parent component (hierarchical). Furthermore, it should be noted that one or more components can be incorporated into a single component that provides an aggregated function, or can be divided into several separate subordinate components, and further provide any one or more intermediate layers and connect them to the subordinate components to provide an aggregated function. Also, any component described herein can interact with one or more other components that are not specifically described herein but are generally known to those skilled in the art.

[0043] Considering the above exemplary system, the method that can be implemented in accordance with the disclosed content can be understood with reference to various figures. For the sake of simplicity of explanation, the method is described as a series of steps, but it should be understood that the disclosed content is not limited to the order of these steps, and some steps may occur in a different order and / or simultaneously with other steps described herein. Furthermore, not all of the disclosed steps are required for the implementation of the method described below.

[0044] Although various embodiments have been described in relation to the exemplary embodiments of the various figures, it should be understood that other similar embodiments may be used and changes and additions may be made to the disclosed embodiments without departing therefrom in order to perform the same function. Therefore, the present invention should not be limited to any single embodiment.

Claims

1. In a sawing apparatus, a vacuum source, a circular saw blade, and a worktable having a central slot axially aligned with the circular saw blade, wherein the central slot provides an air flow path near a predicted contact point between the circular saw blade and a workpiece, and the vacuum source is configured to provide a negative pressure under the worktable through the air flow path. A sawing apparatus characterized by that.

2. The sawing apparatus according to claim 1, wherein the worktable is configured to slide toward the circular saw blade, the central slot includes a plurality of louvers that individually form the air flow path, and when the worktable slides toward the circular saw blade, the air flow path sequentially changes depending on which of the plurality of louvers is close to the predicted contact point. A sawing apparatus characterized by that.

3. The sawing apparatus according to claim 2, further comprising a central slot insert having a plurality of gaps in phase with the plurality of louvers. A sawing apparatus characterized by that.

4. The sawing apparatus according to claim 1, wherein the circular saw blade is connected to the worktable in a chop saw configuration. A sawing apparatus characterized by that.

5. The sawing apparatus according to claim 4, wherein the worktable is connected to the vacuum source and further includes a scoop axially aligned with the rear portion of the circular saw blade, and floating dust near the rear portion of the circular saw blade is drawn in by the negative pressure in the scoop generated by the vacuum source. A sawing apparatus characterized by that.

6. The sawing apparatus according to claim 1, wherein the circular saw blade is connected to the worktable in a table saw configuration. A sawing apparatus characterized by that.

7. The sawing apparatus according to claim 1, wherein the circular saw blade is connected to a blade stabilizer. A sawing apparatus characterized by that.

8. In a sawing apparatus, a housing having a vacuum source and a multi-stage filter, a circular saw blade, and a worktable having a central slot axially aligned with the circular saw blade, wherein the vacuum source is configured to provide a negative pressure to the central slot under the worktable, and the multi-stage filter is configured to collect floating dust from a region close to the central slot by the negative pressure. A sawing apparatus characterized by that.

9. The sawing apparatus according to claim 8, wherein the multi-stage filter includes at least one cyclone filter. A sawing apparatus characterized by that.

10. In the saw apparatus according to claim 8, the multi-stage filter includes a rotatable filter, and the saw apparatus is characterized by this.

11. In the saw apparatus according to claim 10, the rotatable filter includes a self-cleaning flap, and the saw apparatus is characterized by this.

12. The saw apparatus according to claim 8 further includes a removable dust tray under the multi-stage filter. The removable dust tray includes a plurality of individual compartments, and each stage of the multi-stage filter has a corresponding compartment within the removable dust tray, and the saw apparatus is characterized by this.

13. In the saw apparatus according to claim 12, the plurality of separate compartments include a fine particle compartment, a cyclone particle compartment, and a heavy debris compartment, and the saw apparatus is characterized by this.

14. In the saw apparatus according to claim 12, the removable dust tray is configured to accommodate at least one dust confinement bag, and the saw apparatus is characterized by this.

15. In the saw apparatus according to claim 14, the at least one dust confinement bag is configured to include at least one drawstring insert that facilitates sealing of the at least one dust confinement bag, and the saw apparatus is characterized by this.

16. In a saw apparatus, a vacuum source, a circular saw blade, a workbench having a central slot axially aligned with the circular saw blade, and the vacuum source provides a first negative pressure to the central slot under the workbench, and the vacuum source is configured to provide a second negative pressure via an auxiliary port, and the saw apparatus is characterized by this.

17. In the saw apparatus according to claim 16, the auxiliary port is disposed on a blade guard of the circular saw blade, and floating dust within the blade guard is drawn toward the auxiliary port by the second negative pressure, and the saw apparatus is characterized by this.

18. In the saw apparatus according to claim 17, floating dust collected by the first negative pressure in the central slot under the workbench is sent to a first filter, and the floating dust within the blade guard is directed to a second filter, and the saw apparatus is characterized by this.

19. In the saw apparatus according to claim 16, the auxiliary port includes a scoop axially aligned and connected to the rear portion of the circular saw blade, and the floating dust near the rear portion of the circular saw blade is drawn into the scoop by the second negative pressure. A saw apparatus characterized by that.

20. In the saw apparatus according to claim 16, the auxiliary port is configured to connect the vacuum source to an external dust collector. A saw apparatus characterized by that.

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