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EP-4737084-A2 - DRY OPERATED POWER SAW

EP4737084A2EP 4737084 A2EP4737084 A2EP 4737084A2EP-4737084-A2

Abstract

Various dust collection apparatuses are disclosed. In a first example, a dust collection apparatus includes a vacuum source configured to provide a negative pressure, and a multistage filter configured to collect airborne dust drawn by the negative pressure. For this example, the dust collection apparatus includes a dust tray having a shared dust containment area in which the shared dust containment area is a single compartment configured to receive the airborne dust collected by the multistage filter directly from each of a plurality of stages of the multistage filter. In another example, a dust collection apparatus includes a filter, a filter housing configured to house the filter, and an inlet coupled to the filter housing. For this example, the inlet is configured to receive a flow of airborne dust drawn by a negative pressure, and is further configured to mitigate an impact of the airborne dust on the filter.

Inventors

  • GUTH, PAUL W.

Assignees

  • JPL Global, LLC

Dates

Publication Date
20260506
Application Date
20200324

Claims (12)

  1. A dry-operated power saw comprising a dust collection apparatus comprising: a vacuum source configured to provide a negative pressure; a multistage filter configured to collect airborne dust drawn by the negative pressure; and a dust tray having a shared dust containment area, wherein the shared dust containment area is a single unpartitioned compartment configured to receive the airborne dust collected by the multistage filter directly from each of a plurality of stages of the multistage filter into the single unpartitioned compartment.
  2. The dry-operated power saw of claim 1, wherein the multistage filter comprises at least one cyclonic filter.
  3. The dry-operated power saw of claim 1, wherein the multistage filter comprises a rotatable filter.
  4. The dry-operated power saw of claim 1, wherein the multistage filter comprises at least one stage configured to receive unfiltered airborne dust drawn by the negative pressure.
  5. The dry-operated power saw of claim 1, wherein the shared dust containment area is configured to receive a first portion of the airborne dust directly from a first stage of the multistage filter comprising a rotatable filter, and wherein the shared dust containment area is configured to receive a second portion of the airborne dust directly from a second stage of the multistage filter comprising at least one cyclonic filter.
  6. The dry-operated power saw of claim 1, wherein the shared dust containment area is configured to receive a first portion of the airborne dust directly from a first stage of the multistage filter comprising a filter, and wherein the shared dust containment area is configured to receive a second portion of the airborne dust directly from a second stage of the multistage filter configured to receive unfiltered airborne dust drawn by the negative pressure.
  7. The dry-operated power saw of claim 1, wherein at least one stage of the multistage filter comprises a moveable barrier positioned between at least one stage of the multistage filter and the shared dust containment area.
  8. The dry-operated power saw of claim 7, wherein the moveable barrier is configured to open while the vacuum is in an idle mode, and wherein the moveable barrier is configured to close while the vacuum is in an operating mode.
  9. The dry-operated power saw of claim 8, wherein a presence of the negative pressure causes the moveable barrier to close while in the operating mode, and wherein an absence of the negative pressure causes the moveable barrier to open while in the idle mode.
  10. The dry-operated power saw of claim 8, wherein a presence of a magnetic attraction between two halves of the moveable barrier causes the moveable barrier to close while in the operating mode, and wherein an absence of the magnetic attraction between the two halves of the moveable barrier causes the moveable barrier to open while in the idle mode.
  11. The dry-operated power saw of claim 10, further comprising a power source coupled to the moveable barrier, wherein the power source is configured to create the magnetic attraction between the two halves of the moveable barrier while in the operating mode.
  12. The dry-operated power saw of claim 7, wherein the at least one stage of the multistage filter comprises a rotatable filter.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to and the benefit of U.S. Patent Application Serial No. 16/364,070, filed March 25, 2019, entitled "CIRCULAR SAW APPARATUS WITH INTEGRATED MULTISTAGE FILTRATION SYSTEM," which is a continuation-in-part application of U.S. Patent Application Serial No. 16/273,058, filed February 11, 2019, entitled "CIRCULAR SAW APPARATUS WITH INTEGRATED MULTISTAGE FILTRATION SYSTEM," which is a divisional application of U.S. Patent Application Serial No. 15/253,865, filed August 31, 2016, entitled "CIRCULAR SAW APPARATUS WITH INTEGRATED MULTISTAGE FILTRATION SYSTEM," which claims the benefit of U.S. Provisional Patent Application Serial No. 62/212,372, filed August 31, 2015, entitled "CIRCULAR SAW APPARATUS WITH INTEGRATED MULTISTAGE FILTRATION SYSTEM". The entire contents of each of the above applications are incorporated herein by reference. TECHNICAL FIELD The subject disclosure generally relates to dust collection, and more specifically to facilitating dust collection within a circular saw apparatus via a multistage filtration system. BACKGROUND When using conventional power saws, the release of airborne dust and particulate matter resulting from cutting a work piece is problematic. Health hazards associated with breathing in such dust is particularly problematic. Development of wet cutting devices is one solution to dust abatement, wherein water is applied at a blade cutting edge where dust is entrained to a fluid and directed to a holding area. While most wet cutting methods work relatively well, they create additional problems of waste water pollution and environmental concerns. Conventional masonry and tile saws, for instance, typically have a tub or pan of water with a pump that supplies water to the cutting head. While the saw is cutting, the water is sprayed and dispersed around the saw cutting area. Therefore, because this water can drip, spray, and potentially spill, the power saw cannot be placed in close proximity to where the actual masonry and or tile installation is taking place. The user thus spends a significant amount of time walking back and forth between the power saw and the installation area. Accordingly, a dry operated power saw which prevents dust from escaping into the environment is desirable. To this end, it should be noted that the above-described deficiencies are merely intended to provide an overview of some of the problems of conventional systems, and are not intended to be exhaustive. Other problems with the state of the art and corresponding benefits of some of the various non-limiting embodiments may become further apparent upon review of the following detailed description. SUMMARY A simplified summary is provided herein to help enable a basic or general understanding of various aspects of exemplary, non-limiting embodiments that follow in the more detailed description and the accompanying drawings. This summary is not intended, however, as an extensive or exhaustive overview. Instead, the sole purpose of this summary is to present some concepts related to some exemplary non-limiting embodiments in a simplified form as a prelude to the more detailed description of the various embodiments that follow. In accordance with one or more embodiments and corresponding disclosure, various non-limiting aspects are described in connection with a dust collection system. In one such aspect, an apparatus to facilitate dust collection is disclosed. Within such embodiment, the apparatus includes a vacuum source, a circular saw blade, and a worktable comprising a center slot axially aligned to the circular saw blade. Here, the center slot includes an air flow channel proximate to an anticipated point of contact between the circular saw blade and a workpiece. The vacuum source is then configured to provide a focused negative pressure beneath the worktable via the air flow channel. In a further aspect, another apparatus to facilitate dust collection is disclosed. For this embodiment, the apparatus includes a housing comprising a vacuum source and a multistage filter. The apparatus further includes a circular saw blade and a worktable comprising a center slot axially aligned to the circular saw blade. Here, the vacuum source is configured to provide a negative pressure beneath the worktable at the center slot, and the multistage filter is configured to collect airborne dust drawn by the negative pressure from an area proximate to the center slot. In yet another aspect, an apparatus to facilitate dust collection is disclosed, which includes a vacuum source, a circular saw blade, and a worktable. For this embodiment, the worktable comprises a center slot axially aligned to the circular saw blade, and the vacuum source is configured to provide a first negative pressure beneath the worktable at the center slot. The vacuum source is then further configured to provide a second negative pressure via an auxiliary port. In another aspect, a dus