ROTATABLE FILTER SYSTEM AND METHODOLOGY

Abstract

Various aspects of an apparatus are disclosed. In a particular aspect, an apparatus comprising a cylindrical filter, a filter cleaning knob, and a filter cleaning flap is disclosed. Within such embodiment, the filter cleaning knob is configured to rotate the cylindrical filter. The filter cleaning flap is coupled to the cylindrical filter and configured to sequentially make contact with a plurality of pleated segments of the cylindrical filter as the filter cleaning knob is rotated.

Claims

1. An apparatus comprising: a worktable that includes a center slot axially aligned with a circular saw blade; a rotatable cylindrical filter housed in a filter chamber and comprising a cylindrical filter media having a plurality of pleated segments about a cylindrical surface of the rotatable cylindrical filter, wherein the rotatable cylindrical filter comprises a first filter end cap and a second filter end cap, and wherein the first filter end cap and the second filter end cap are respectively configured to secure opposite ends of the rotatable cylindrical filter; a filter cleaning knob configured to rotate the rotatable cylindrical filter; a stationary filter cleaning flap secured to an interior wall of the filter chamber and configured to sequentially make contact with the plurality of pleated segments of the cylindrical filter media as the rotatable cylindrical filter is rotated via the filter cleaning knob; and a vacuum device configured to provide a negative pressure beneath the worktable at the center slot, wherein the vacuum device is coupled to the rotatable cylindrical filter via a suction tube, and wherein the suction tube includes a first end configured to connect to the vacuum device and a second end configured to connect to the rotatable cylindrical filter.

2. The apparatus of claim 1, wherein the vacuum device is configured to create an air flow that draws air from an exterior of the rotatable cylindrical filter towards an interior of the rotatable cylindrical filter.

3. The apparatus of claim 2, wherein the air flow further includes air drawn from beneath the worktable at the center slot.

4. The apparatus of claim 1, wherein the suction tube is coupled to the rotatable cylindrical filter via an intake port.

5. The apparatus of claim 1, further comprising an annular rim protrusion configured to mate with the second filter end cap via a gasket.

6. The apparatus of claim 1, further comprising a connection bolt configured to connect the filter cleaning knob to the first filter end cap, wherein the connection bolt penetrates a hole in an access panel.

7. The apparatus of claim 6, further comprising a panel bushing configured to provide translational support and rotational support to the connection bolt.

8. An apparatus comprising: a worktable that includes a center slot axially aligned with a circular saw blade; a rotatable cylindrical filter housed in a filter chamber and comprising a cylindrical filter media having a plurality of pleated segments about a cylindrical surface of the rotatable cylindrical filter; a stationary filter cleaning flap secured to an interior wall of the filter chamber and configured to sequentially make contact with the plurality of pleated segments of the cylindrical filter media as the rotatable cylindrical filter is rotated; and a vacuum device coupled to the rotatable cylindrical filter and configured to provide a negative pressure beneath the worktable at the center slot.

9. The apparatus of claim 8, further comprising a filter cleaning knob configured to rotate the rotatable cylindrical filter.

10. The apparatus of claim 8, further comprising: a vacuum suction tube connected to the vacuum device; and an annular rim protrusion extending from the vacuum suction tube.

11. The apparatus of claim 10, wherein the annular rim protrusion is configured to mate with the second filter end cap via a gasket and a bearing.

12. The apparatus of claim 11, wherein the second filter end cap further comprises a bearing seat acting as an abutment to the bearing.

13. An apparatus comprising: a worktable that includes a center slot axially aligned with a circular saw blade; a vacuum device configured to provide a negative pressure beneath the worktable at the center slot; a rotatable cylindrical filter comprising a first filter end cap and a second filter end cap, wherein the first filter end cap and the second filter end cap are respectively configured to secure opposite ends of the rotatable cylindrical filter; a suction tube, wherein the suction tube includes a first end configured to connect to the vacuum device and a second end configured to connect to the rotatable cylindrical filter; and an annular rim protrusion extending from the suction tube.

14. The apparatus of claim 13, wherein the second end of the suction tube is configured to connect to the rotatable cylindrical filter via an intake port.

15. The apparatus of claim 13, wherein the rotatable cylindrical filter comprises a cylindrical filter media having a plurality of pleated segments about a cylindrical surface of the rotatable cylindrical filter.

16. The apparatus of claim 15, further comprising a stationary filter cleaning flap configured to sequentially make contact with the plurality of pleated segments of the cylindrical filter media as the rotatable cylindrical filter is rotated.

17. The apparatus of claim 13, further comprising a filter cleaning knob configured to rotate the rotatable cylindrical filter.

18. The apparatus of claim 13, wherein the annular rim protrusion is configured to mate with the second filter end cap via a gasket.

19. The apparatus of claim 13, wherein the annular rim protrusion is configured to mate with the second filter end cap via a bearing.

20. The apparatus of claim 19, wherein the second filter end cap further comprises a bearing seat acting as an abutment to the bearing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The novel features of this invention, as well as the invention itself, both as to its structure and its operation, will be best understood from the accompanying drawings, taken in conjunction with the accompanying description, in which similar reference characters refer to similar parts, and in which:

[0023] FIG. 1 is a perspective view of a preferred chop saw embodiment of the present invention;

[0024] FIG. 2 is a rear perspective view of a the invention embodiment illustrated in FIG. 1;

[0025] FIG. 3 is cross-sectional view of the invention embodiment as taken along line 3-3 in FIG. 1;

[0026] FIG. 4 is a cross-sectional view of the invention embodiment as taken along line 4-4 in FIG. 1;

[0027] FIG. 5A is close up cut-away view of the perspective illustration shown in FIG. 1;

[0028] FIG. 5B is an end view of a filter cleaning knob of the present invention;

[0029] FIG. 6 is a schematical illustration of a cylindrical filter configuration embodiment of the present invention; and

[0030] FIG. 7A and FIG. 7B illustrate how an upper housing and a lower dust bin relate to one another.

[0031] FIG. 8 illustrates a cylindrical filter in accordance with an aspect of the disclosure.

[0032] FIG. 9 illustrates an exploded view of the cylindrical filter illustrated in FIG. 8.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Referring initially to FIG. 1, a preferred embodiment 100 comprises a cut-off type saw which is configured to cut masonry, and more specifically stones, bricks, pavers, and other masonry items. It should be understood that inventive concepts herein can also apply to woodworking circular saws and additionally saws for cutting plastic and roofing. The dust collection system 100 of the invention works in connection with a specifically configured saw 201, with a unique cutting table 200 and dust collector arrangement. The saw may be a cut-off saw or a chop saw, which has a circular toothed blade 201 or grinding wheel, and which rotates in a vertical plane of rotation as shown. The cut-off saw is further mounted on a pivotable arm 205 which allows the saw to be raised and lowered from a non-cutting position onto a cutting position so that the blade contacts a masonry work piece 420, and is lowered through the work piece 420 as the saw blade cuts.

[0034] In the FIG. 1 embodiment, saw 201 is shown coupled to a saw motor 204. It should be further appreciated that a similar circular saw could be coupled to a belt or pulley system for driving the saw 201. Still further, saw 201 is provided with a cutting table 200 which includes a blade center slot 202. As the cutting blade passes through the work piece, the blade continues until it enters the center slot 202; and additionally passes through the surface of the cutting table 200 into the slot 202. Cutting table 200 should be broadly construed as a substantially flat structure supporting a workpiece.

[0035] As circular blade 201 teeth engage the work piece 420 (FIG. 4), dust and particulate matter 410 are ejected from the work piece in various directions. A negative pressure provided by vacuum apparatus 321 (FIG. 3) causes air to flow in a downward direction thereby curtailing outward dispersion of the dust and particulate matter 410. In conventional prior art systems, the saw blade 201 would not pass through a blade slot, and thus ejected material would strike the cutting table and be collected after striking the cutting table. In the saw and dust collection system 100 of the present invention, a powerful flow of air is directed past the cutting blade 201, through center slot 202 and angled side slots 203 and into a filter chamber 310 below the cutting table 200. Also importantly, a flow of air is provided to remove dust at the instant the workpiece 420 is contacted by the saw blade 20] and throughout the cutting thereof.

[0036] With reference to FIG. 2, a rear perspective view of the present invention is shown. Exhaust port 211 is provided for discharge of filtered air 330. Air vents 213 provide for ventilation and heat transfer from vacuum apparatus 321. Lifting handles 221, 223 are further provided on first and second lateral sides to assist portability of the unit 100. Electrical connections 212 allow for external power to be supplied to the device 100 as shown.

[0037] In a preferred embodiment system 100 additionally comprises two motors 204, 321; a first 204 that drives the saw blade 201 and a second 321 that provides a prime mover for air flow. The saw and collection system 100 of the present invention may further include a time delay relay associated with power switch 214. When the saw and collection system is switched on, a first of two loads 204, 321 is engaged for a pre-determined period of time as designed into the time delay relay. Subsequently, a second of the two electrical loads 204, 321 is engaged. By staggering the two starting current surges, the peak load on the electrical system is reduced. Additionally, this will reduce a likelihood that the system 100 current surge causes a circuit breaker to be tripped.

[0038] Also as shown in FIG. 1 and in FIG. 2, the worktable 200 has two separable units, namely upper housing 210 and lower dust bin 220. In addition to lifting handles 221, 223 on lateral sides, lifting handles 215 are provided on a front and a back of the unit 100 to also serve as hand holds for a user transporting the device. Latch 222 is provided to secure upper housing 210 to lower dust bin 220 also as shown in FIG. 7A and FIG. 7B.

[0039] With reference to FIG. 3, a sectional view taken along line 3-3 in FIG. 1 is shown. Particulate matter 410 from workpiece 420 is drawn through center slot 202 and angled side slot 203. It should also be appreciated that side slot could be aligned parallel to the center slot 202 and at right angles thereto. Air containing dust 410 flows as shown by directional arrows 330 around partitioning wall 340. Dust 410 is fm1her filtered from the air through cylindrical pleated filter 311. Some of the dust and particulate matter will fall to dust bin 220 and some will be trapped by the filter. Filter cleaning flap 312 is provided connected to a ledge 313 adjacent to partitioning wall 340. The cleaning flap 312 will assist in clearing the cylindrical filter 311 when a user rotates knob 217. Translational wall 350 serves to separate filter chamber 310 from vacuum chamber 320. Exhaust hose 322 is shown in the vacuum chamber 320 for exhausting air to an exterior of the device 100. The vacuum apparatus 321 may use various types of motors to generate negative pressure and CFM to include blower motor, centrifugal fan, squirrel cage fan, propeller fan, or any other conventional moving device.

[0040] FIG. 4 similarly shows the flow of air with directional arrows 330 as a sectional view along line 4-4 of FIG. 1. A cutaway in translational wall 350 reveals filter compartment 310. It will be appreciated that other configurations for filter chamber 310 and vacuum chamber 320 could be well within the scope of the present invention, such as, for example the filter chamber 310 configured directly below slots 202, 203.

[0041] FIG. 5A shows a closer view of the embodiment 100 in the FIG. 1 illustration. The cut-a-way view also reveals a perspective illustration of the pleated cylindrical filter 311. A carve out in a lateral side of upper housing 210 is provided to accommodate access panel 218. Filter cleaning knob 217 is connected to the cylindrical filter 311 through the access panel 218 as further illustrated in FIG. 6. Access panel 218 can further be removed for maintenance and disassembly of the cylindrical filter 311 for replacement or deep cleaning. FIG. 5 shows an end view of filter cleaning knob 217.

[0042] FIG. 6 illustrates more specifically how a cylindrical filter 311 connects to a vacuum apparatus 321 via vacuum tube 630 penetrating transverse wall 350. Initially, filter 311 is supported on it is sides by filter end caps 610, 620. Knob 217 connects to the first end cap 610 via coupler spacing 611 and connection bolt 612. Panel bushing 613 provides translational and rotational support to connection bolt 612. Hexagonal nut 614 secures the first filter end cap 610. At the other end, vacuum tube 630 has an annular rim 631 protruding therefrom and provides an abutment for bearing 623 also supported by gasket 622. Recess 621 in the second filter end cap 620 provides the space to connect bearing 623 around rim 631 as shown.

[0043] FIG. 7A and FIG. 7B provide a more detailed view of how upper housing 210 connects to lower dust bin 220. Rim 710 mates with groove 720 as shown for a secure connection upon closure of latch 222. An inside of the dust bin 220 shows an area where dust ultimately settles for later removal.

[0044] In another aspect of the disclosure, particular configurations of the aforementioned cylindrical filter 311 are contemplated. To this end, it should be noted that conventional air filters are inherently problematic because during their use they become saturated with dust and debris which at some point significantly reduces airflow. As previously disclosed herein, a filter pleat agitator mechanism (e.g., flap 312) may be included to periodically clean the aforementioned cylindrical filters in place by rotating these filters against the filter pleat agitator mechanism which would dislodge dust/debris and thus increase filter efficiency.

[0045] This rotational cleaning method, however, creates the problem of sealing the cylindrical filter to the intake port while still allowing it to rotate. In addition, it would be desirable for this rotating filter/seal to endure in an extreme environment of high temperature, high vibration, and micro fine dust. It would be further desirable that the seal material is chosen such that it does not damage the intake port during the rotation process or from the high vibration environment.

[0046] Referring next to FIGS. 8-9, an exemplary cylindrical filter with a seal configured for such extreme environments is provided in accordance with an aspect of the disclosure. As illustrated in FIG. 8, cylindrical filter 800 comprises an intake port 820, wherein intake port 820 may be configured to facilitate the illustrated air flow via a vacuum suction tube (e.g., vacuum suction tube 630) coupled to a vacuum device. It is also contemplated that cylindrical filter 800 further includes annular seal 810, wherein annular seal 810 is firmly embedded within end cap 830 by annular seal retainer 812.

[0047] Here, it should be appreciated that cylindrical filter 800 illustrated in FIGS. 8-9 is substantially similar to the aforementioned cylindrical filter 311, wherein the structure and functionality of cylindrical filter 800 is substantially similar to cylindrical filter 311. For instance, similar to cylindrical filter 311, it is contemplated that cylindrical filter 800 is configured to rotate against a filter pleat agitator mechanism (e.g., flap 312) for the purpose of cleaning dust and debris from the filter pleats of filter media 840 to increase filter efficiency. It is further contemplated that gasket 622 illustrated in FIG. 6, may be substantially similar to annular seal 810, wherein annular seal 810 is made of material configured to maintain a vacuum tight seal and allow for rotation of cylindrical filter 800 in an extreme environment of high heat, high vibration, and micro fine dust. Moreover, it would be desirable to manufacture annular seal 810 from a substance that most mitigates the damaging effects to the intake port 820 of cylindrical filter 800 during rotation and/or within a high temperature/vibration environment.

[0048] In a particular aspect, it contemplated that annular seal 810 is made of a spongy foam-like material. For instance, annular seal 810 may be made of silicone foam. Indeed, as is well known, silicone foam has a wide operating temperature (e.g., temperature range of 67 F. to 392 F. (55 C. to 200 C.)), and provides excellent dust sealing capabilities (e.g., it is well known that open cell and closed cell silicone foam products can be used for sealing out dust with low compressive forces). As is also generally known, silicone foam products are typically manufactured from platinum cured, liquid silicone rubber. The raw compound is expanded and dispensed on a continuous casting line, then heat cured. The expansion process is controlled to create a range of products having different densities, softness/firmness and cell structures. Open cell silicone foams are widely used for cushioning, dust sealing or light water sealing. Closed cell silicone foam materials are used for outdoor gaskets, wash-down gaskets and resilient cushioning pads. Expanded silicone foam products have a firmness range from ultra soft to extra firm, allowing engineers to select the best product for their application.

[0049] During use, it is thus contemplated that cylindrical filter 800 yields various desirable aspects. For instance, it is contemplated that cylindrical filter 800 may be configured to rotate via knob 850 such that cylindrical filter 800 rotates against a filter pleat agitator mechanism (e.g., flap 312) for the purpose of cleaning the filter pleats filter media 840, and thus optimizing airflow. The material of annular seal 810 may also be particularly selected (e.g., silicone foam) so as to maintain a vacuum tight seal and allow for rotation in an extreme environment of high heat, high vibration, and micro fine dust, while being soft enough so as to not damage intake port 820. Namely, it is contemplated that annular seal 810 may be configured to function as a diaphragm between cylindrical filter 800 and intake port 820 to isolate vibration during use, and thus eliminating premature damage to intake port 820.

[0050] While the particular aspects herein shown and disclosed in detail is fully capable of obtaining the objects and providing the advantages herein before stated, it is to be understood that it is merely illustrative of the presently preferred embodiments of the invention and that no limitations are intended to the details of construction or design herein shown other than as described in the appended claims.

[0051] Insubstantial changes from the claimed subject matter as viewed by a person with ordinary skill in the art, now known or later devised, are expressly contemplated as being equivalently within the scope of the claims. Therefore, obvious substitutions now or later known to one with ordinary skill in the art are defined to be within the scope of the defined elements.