DUST SHROUD FOR GAS POWERED CIRCULAR SAWS

• US 20090183800A1
• Filed: 01/21/2009
• Published: 07/23/2009
• Est. Priority Date: 01/22/2008
• Status: Active Grant

• Current Assignee: Dustless Depot
• Original Assignee: Dustless Depot
• Inventors: Loveless, Spencer, Loveless, Michael
• Granted Patent: US 8,011,398 B2
• Time in Patent Office: Days
• US Class Current: 144/252.100
• CPC Class Codes: B23D 59/006 for removing or collecting chips
• CPC Class Codes: Y10T 83/207 By suction means

Abstract

A dust shroud for gas powered circular saws allows for mounting to a circular saw and for use therewith out hindering the use of the saw. The shroud does not interfere with the ability to operate the saw or set the saw on the ground, and effectively collects dust and debris without reducing the depth of cut.

Claims

1. A dust shroud for gas powered circular saws comprising:

a dust collection chamber configured to receive the blade of a gas powered circular saw through a slot formed therein such that the dust collection chamber extends around both sides of the saw blade;

a passage disposed in fluid communication with the chamber and extending away from the chamber so as to extend below a circular saw; and

a vacuum port disposed in fluid communication with the passage such that a vacuum disposed in the vacuum port can extract dust from the chamber.

2. The dust shroud of claim 1, wherein the dust collection chamber is generally enclosed, and wherein a top surface thereof has a slot formed therethrough, a front surface thereof has a slot formed therethrough and connecting to the slot formed through the top surface, and a bottom surface thereof has an enlarged opening formed therethrough and connecting to the slot formed through the front surface.

3. The dust shroud of claim 2, wherein the bottom surface of the dust collection chamber is substantially open, and wherein the front surface and top surface are closed except for the slots formed therethrough.

4. The dust shroud of claim 2, wherein a bottom portion of the front surface is open to a width corresponding to the width of the enlarged opening in the bottom surface.

5. The dust shroud of claim 1, wherein the passage has a cross section which is narrow in a vertical direction and elongate in a horizontal direction.

6. The dust shroud of claim 1, wherein the passage passes between feet disposed on the bottom of the gas powered circular saw when the shroud is attached to the saw.

7. The dust shroud of claim 1, wherein the passage extends rearwardly from the dust collection chamber and thereafter curves so as to extend laterally, and wherein the vacuum port faces rearwardly and is laterally disposed relative to the dust collection chamber.

8. The dust shroud of claim 1, wherein the bottom surface of the dust collection chamber and the bottom surface of the passage are disposed at an acute angle relative to each other.

9. The dust shroud of claim 1, wherein the bottom surface of the passage and the bottom surface of the vacuum port are generally coplanar, and wherein the bottom surface of the dust collection chamber and the bottom surface of the passage are disposed at an acute angle relative to each other such that they extend upwardly from a point adjacent the rear portion of the dust collection chamber.

10. The dust shroud of claim 1, wherein installation of the dust shroud on a gas powered circular saw places the dust collection chamber so as to extend around a portion of the blade and generally enclose said portion of the blade, position an open area of the dust collection chamber relative to the blade such that blade teeth pass through the open area, position a front portion of the passage between feet disposed on the bottom of the circular saw, position a rear portion of the passage so as to curve towards a side of the saw and extend laterally thereto, and position the vacuum port so as to extend longitudinally towards the back of the saw.

11. A dust shroud for a gas powered circular saw comprising:

a generally enclosed dust collection chamber, the dust collection chamber having a slot formed through a front surface and a top surface thereof and an opening formed in a lower surface thereof, the opening being continuous with the slot, the dust collection chamber being formed to receive a circular saw blade through the opening and slot formed therethrough so as to generally enclose a portion of the blade and such that blade teeth pass through said opening;

an air passage pneumatically connected to the dust collection chamber and extending rearwardly therefrom, the air passage having a reduce vertical height and an extended horizontal width, the air passage curving laterally so as to extend towards the side of a gas powered circular saw; and

a vacuum port pneumatically connected to the air passage and connectable to a vacuum hose so as to draw air from the dust collection chamber, through the air passage, and through the vacuum port.

12. The dust shroud of claim 11, wherein the vacuum port extends rearwardly along the side of the saw.

13. The dust shroud of claim 11, wherein the bottom of the vacuum port is generally coplanar with the bottom of the air passage and disposed at an acute angle relative to the bottom of the dust collection chamber.

14. The dust shroud of claim 11, wherein, when the dust shroud is mounted to a circular saw, the air passage passes between feet mounted on the bottom of the saw and extends laterally to the side of the bottom of the saw.

15. The dust shroud of claim 11, wherein, when the dust shroud is mounted to a circular saw, the bottom of the dust collection chamber is positioned so as to generally extend towards the front of a blade guard.

16. A dust shroud for a gas powered circular saw comprising:

a generally enclosed dust collection chamber, the dust collection chamber having an opening formed in the bottom thereof and a slot formed through the front and top thereof, the slot being connected to the opening, the slot and opening receiving a blade of the gas powered circular saw so as to enclose a portion of the blade;

an air passage disposed in pneumatic communication therewith, the air passage extending rearwardly from the dust collection chamber and curving laterally so as to extend to the side of a gas powered circular saw; and

a vacuum port disposed in pneumatic communication with the air passage, the vacuum port being displaced laterally from the dust collection chamber and extending rearwardly therefrom.

17. The dust shroud of claim 16, wherein the bottom of the dust collection chamber angles upwardly from the back thereof and wherein the bottom of the air passage angles upwardly from the front thereof.

18. The dust shroud of claim 16, wherein, when the dust shroud is mounted to a circular saw, the air passage passes between feet attached to the bottom of the saw and extends along the bottom of the saw.