Table saw with dust shield

• US 10,076,796 B2
• Filed: 08/26/2009
• Issued: 09/18/2018
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: Credo Technology Corporation, Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH, Robert Bosch Tool Corporation (Robert Bosch GmbH)
• Inventors: Chung, Brian Hyuk Joon
• Primary Examiner(s): Dexter, Clark F
• Application Number:
  US12/547,859
• Publication Number:
  US 20110048205A1
• Time in Patent Office: 3,310 Days
• Field of Search: 834772, 83 58, 83 62, 83 621
• CPC Class Codes: B23D 45/066 the pivoted lever being mounted on a carriage
• CPC Class Codes: B23D 45/067 the saw blade being adjustable according to depth or angle of cut
• CPC Class Codes: B23D 47/00 Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts constructional features of these parts per se B23Q; details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00
• CPC Class Codes: B23D 47/08 of devices for bringing the circular saw blade to the workpiece or removing same therefrom
• CPC Class Codes: B23D 59/006 for removing or collecting chips
• CPC Class Codes: B23Q 11/0042 Devices for removing chips B23Q11/02, B23Q11/0875 take precedence
• CPC Class Codes: B23Q 11/0046 by sucking
• CPC Class Codes: B23Q 11/06 Safety devices for circular cutters
• CPC Class Codes: Y02P 70/10 Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
• CPC Class Codes: Y10T 83/081 With randomly actuated stopping means
• CPC Class Codes: Y10T 83/089 Responsive to tool characteristic
• CPC Class Codes: Y10T 83/773 Work-support includes passageway for tool [e.g., slotted table]
• CPC Class Codes: Y10T 83/7734 With guard for tool
• CPC Class Codes: Y10T 83/8722 Static

Abstract

A table saw in one embodiment includes a motor, a blade operably connected to the motor, at least a portion of the blade positioned within an enclosure, and a dust plate extending within the enclosure and positioned between the at least a portion of the blade and the motor.

Claims

1. A table saw, comprising:

a swing arm pivotable about a pivot along a swing arm path between a first swing arm position and a second swing arm position;

a latch pin movable between a first latch pin position whereat the latch pin engages a spring biased latch hold such that the swing arm is maintained in the first swing arm position, and a second latch pin position whereat the latch pin does not engage the spring biased latch hold and the swing arm is not maintained in the first swing arm position;

a motor;

a blade operably connected to the motor and supported by the swing arm, at least a portion of the blade positioned within an enclosure;

a dust plate extending within the enclosure and positioned between the at least a portion of the blade and the motor, the dust plate including a shaft slot with an upper portion and a lower portion, wherein the lower portion of the slot is wider than the upper portion of the slot, the dust plate dividing the enclosure into a mechanism portion and a blade portion, the at least a portion of the blade positioned within the blade portion and the swing arm positioned within the mechanism portion; and

a control system that controls an actuating device to cause the actuating device to transfer a force to the swing arm when the swing arm is maintained at the first swing arm position, wherein the force is sufficient to move the latch pin from the first latch pin position to the second latch pin position.

2. The table saw of claim 1, further comprising:

a dust collection port configured to vent the blade portion of the enclosure.

3. The table saw of claim 1, wherein the blade is supported by an arbor shaft extending through an arbor shaft slot in the dust plate and the arbor shaft is supported by the swing arm.

4. The table saw of claim 3, further comprising:

a dust curtain extending adjacent to the slot.

5. The table saw of claim 4, wherein the dust curtain comprises a plurality of bristles.

6. The table saw of claim 4, wherein the dust curtain comprises a plurality of interconnected plates.

7. The table saw of claim 1, wherein the pressure within the mechanism portion is higher than the pressure within the blade portion during operation of the table saw.

8. A table saw, comprising:

a swing arm mounted on a carriage for movement therewith, the swing arm further movable relative to the carriage so as to be movable with respect to a latch hold along a swing arm path between a first swing arm position and a second swing arm position;

a latch pin movable between a first latch pin position whereat the latch pin engages the latch hold such that the swing arm is maintained in the first swing arm position, and a second latch pin position whereat the latch pin does not engage the latch hold and the swing arm is not maintained in the first swing arm position;

a motor;

an enclosure;

a dust plate substantially dividing the enclosure into a mechanism portion and a blade portion, wherein the carriage is movable relative to the dust plate;

a blade operably connected to the motor and supported by the swing arm, at least a portion of the blade positioned within the blade portion of the enclosure;

a shaft slot in the dust plate, the shaft slot including a first end portion and a generally opposing second end portion;

an arbor shaft extending from the swing arm through the shaft slot and supporting the blade; and

a control system that controls an actuating device to cause the actuating device to cause the latch pin to move from the first latch pin position to the second latch pin position,

wherein the first end portion of the shaft slot is configured to allow for linear vertical movement of the arbor shaft during the movement of the carriage relative to the dust plate, and the second end portion of the shaft slot is configured to allow for movement of the arbor shaft during the movement of the swing arm along the swing arm path.

9. The table saw of claim 8, further comprising:

a dust collection port configured to vent the blade portion of the enclosure.

10. The table saw of claim 8, further comprising:

a dust curtain extending adjacent to the slot.

11. The table saw of claim 10, wherein the dust curtain comprises a plurality of bristles.

12. The table saw of claim 10, wherein the dust curtain comprises a plurality of interconnected plates.

13. The table saw of claim 8, wherein the pressure within the mechanism portion is higher than the pressure within the blade portion during operation of the table saw.

14. The table saw of claim 8, wherein the shaft slot has an upper portion and a lower portion, and the lower portion of the slot is wider than the upper portion of the slot.