Table saw with reset mechanism

• US 8,327,744 B2
• Filed: 08/26/2009
• Issued: 12/11/2012
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: Credo Technology Corporation, Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Groth, Brady J., Mehta, Amit K., Doumani, Robert S.
• Primary Examiner(s): Alie, Ghassem
• Application Number:
  US12/548,263
• Publication Number:
  US 20110048194A1
• Time in Patent Office: 1,203 Days
• Field of Search: 144/384, 144/391, 144/427, 144/154, 144/356, 834/772, 83/621, 83/58, 834/713, 83D/IG.1, 834/712, 835/81, 834/78, 834/90, 836/63, 837/81, 835/64, 324/688, 324/661, 318/16, 318/480, 340/686.5, 340/686.6, 340/532
• US Class Current: 83/477.2
• CPC Class Codes: B23D 45/061 the saw blade 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 47/08 of devices for bringing the circular saw blade to the workpiece or removing same therefrom
• CPC Class Codes: B23D 59/002 for the position of the saw blade B27B5/36 and B27B9/02 take precedence
• CPC Class Codes: B27G 19/02 for circular saws
• 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 83/8749 By pivotal motion

Abstract

A power tool in one embodiment includes a swing arm movable along a swing arm path between an upper first swing arm position and a lower second swing arm position, a latch hold mechanism movable between a first latch hold position adjacent to the swing path and a second latch hold position whereat at least a portion of the latch hold mechanism is within the swing path, an actuator configured to force the swing arm assembly away from the first swing arm position and toward the second swing arm position, a swing arm reset configured to pivot the swing arm from the second swing arm position to the first swing arm position, a latch hold reset configured to pivot the latch hold mechanism from the second latch hold position to the first latch hold position, and a control system configured to control the actuator.

Claims

1. A power tool, comprising:

a work-piece support surface;

a swing arm movable along a swing arm path between an upper first swing arm position proximate to the work-piece support surface and a lower second swing arm position;

a latch hold mechanism movable between a first latch hold position adjacent to the swing path and a second latch hold position whereat at least a portion of the latch hold mechanism is within the swing path;

an actuator configured to force the swing arm away from the first swing arm position and toward the second swing arm position;

a swing arm reset configured to pivot the swing arm from the second swing arm position to the first swing arm position in response to a first user applied force, and configured to pivot away from the swing arm when the swing arm is maintained at the first swing arm position by a latch pin;

a latch hold reset configured to pivot the latch hold mechanism from the second latch hold position to the first latch hold position in response to a second user applied force; and

a control system configured to control the actuator.

2. The power tool of claim 1, further comprising:

a first structure with a first pivot configured to pivot the swing arm along the swing arm path, wherein the swing arm reset comprises a second pivot configured to pivot the swing arm along the swing arm path.

3. The power tool of claim 2, wherein the first structure is a carriage movable along an axis toward or away from the work-piece support surface and the swing arm reset is pivotably supported by the carriage through the second pivot.

4. The power tool of claim 2, wherein the swing arm reset further comprises:

a handle extending outwardly from a table saw housing.

5. The power tool of claim 4, wherein a portion of the handle located outwardly from the table saw housing is removable from the rest of the swing arm reset.

6. The power tool of claim 1, wherein the latch hold reset comprises:

a knob positioned outside of a power tool housing; and

a shaft extending from the knob to a location within the power tool housing.

7. The power tool of claim 6, wherein the shaft is pivotably attached to the latch hold.

8. The power tool of claim 6, wherein the shaft is pivotably attached to the latch hold through one or more intermediate shafts.

9. The power tool of claim 1, wherein the latch hold reset comprises:

a structure fixedly attached to the latch hold and shaped to mate with a latch hold reset handle.

10. The power tool of claim 1, further comprising:

a roller attached to the swing arm, wherein the swing arm reset is pivotable into contact with the roller.

11. A power tool, comprising:

a work-piece support surface;

a swing arm movable along a swing arm path between an upper first swing arm position proximate to the work-piece support surface and a lower second swing arm position;

a latch hold mechanism movable between a first latch hold position adjacent to the swing path and a second latch hold position whereat at least a portion of the latch hold mechanism is within the swing path;

an actuator configured to force the swing arm away from the first swing arm position and toward the second swing arm position;

a swing arm reset configured to pivot the swing arm from the second swing arm position to the first swing arm position in response to a first user applied force, the swing arm reset including a belt operably connected to a control arm, the control arm pivotably connected to the swing arm;

a latch hold reset configured to pivot the latch hold mechanism from the second latch hold position to the first latch hold position in response to a second user applied force; and

a control system configured to control the actuator.

12. The power tool of claim 11, further comprising:

a handle operably connected to the belt.

13. The power tool of claim 12, wherein:

the belt defines a first side extending between a pair of pulleys and a second side extending between the pair of pulleys;

the first side is in opposition to the second side;

the control arm is operably connected to the first side; and

the handle is operably connected to the second side.

14. The power tool of claim 13, wherein the handle is removably connectable to the belt.

15. The power tool of claim 14, wherein the handle is a miter gauge fence handle.

16. The power tool of claim 14, further comprising:

an access panel configured to provide access to the belt.

17. The power tool of claim 11, wherein the latch hold reset comprises:

a knob positioned outside of a power tool housing; and

a shaft extending from the knob to a location within the power tool housing.

18. The power tool of claim 17, wherein the shaft is pivotably attached to the latch hold.

19. The power tool of claim 18, wherein the shaft is pivotably attached to the latch hold through one or more intermediate shafts.

20. The power tool of claim 11, wherein the latch hold reset comprises:

a structure fixedly attached to the latch hold and shaped to mate with a latch hold reset handle.