Table saw with actuator module

• US 9,969,013 B2
• Filed: 08/26/2009
• Issued: 05/15/2018
• 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: Mehta, Amit K., Groth, Brady J.
• Primary Examiner(s): Dexter, Clark F
• Application Number:
  US12/547,818
• Publication Number:
  US 20110048188A1
• Time in Patent Office: 3,184 Days
• Field of Search: 83 621, 83 58, 834772, 83564
• 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 59/002 for the position of the saw blade mounting for swiveling or tilting a circular saw blade B27B5/36; portable power-driven circular saws with adjustment for cutting depth or amount of tilting B27B9/02
• CPC Class Codes: B23Q 11/0078 Safety devices protecting the operator, e.g. against accident or noise protecting the machine tool B23Q5/58; protecting people, in general F16P1/00, F16P3/00
• CPC Class Codes: B23Q 11/0089 actuating operator protecting means, e.g. closing a cover element, producing an alarm signal
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: Y10T 83/081 With randomly actuated stopping means
• CPC Class Codes: Y10T 83/773 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 assembly movable along a swing path between a first swing arm position and a second swing arm position, a latch pin pivotable between a first position and a second position, an actuator module configured to receive a plurality of actuators, a first actuating module position within the actuator module configured to align a first of the plurality of actuators with a strike plate on the swing arm assembly, a loader configured to bias a second of the plurality of actuators from a second actuating module position within the actuator module toward the first actuating module position, and a control system configured to actuate each of the plurality of actuators positioned in the first actuating module position to force the swing arm assembly away from the first swing arm position and toward the second swing arm position.

Claims

1. A power tool comprising:

a work-piece support surface;

a swing arm assembly movable along a swing path between a first swing arm position whereat a portion of a shaping device supported by the swing arm assembly extends above the work-piece support surface and a second swing arm position whereat the portion of the shaping device does not extend above the work-piece support surface;

a latch pin movable between a first latch pin position whereat the latch pin supports the swing arm assembly in the first swing arm position and a second latch pin position whereat the latch pin does not support the swing arm assembly in the first swing arm position wherein the latch pin includes an actuation ramp;

an actuator module configured to receive a plurality of actuators, and a first actuator received in the actuator module, the actuator module including a first actuating module position whereat the first actuator is aligned with a portion of the swing arm assembly, and whereat in the first actuating module position within the actuator module the first actuator is further aligned with the actuation ramp; and

a control system configured to actuate each of the plurality of actuators when positioned in the first actuating module position, the power tool configured such that actuation of each of the plurality of actuators when the latch pin is in the first latch pin position and supporting the swing arm assembly in the first swing arm position results in

(i) movement of the latch pin from the first latch pin position to the second latch pin position, and

(ii) forcing of the swing arm assembly away from the first swing arm position and toward the second swing arm position.

2. The power tool of claim 1, wherein:

the actuator module comprises a spring configured to bias a second of the plurality of actuators from a second actuating module position toward the first actuating module position.

3. The power tool of claim 1, wherein each of the plurality of actuators comprises a pyrotechnic device.

4. The power tool of claim 1, wherein the actuator module is removably supported beneath the work-piece support surface.

5. The power tool of claim 1, wherein the first actuator is the first actuator of a plurality of actuators received in the actuator module, and

wherein each of the plurality of actuators is independently removable from the actuator module.

6. The power tool of claim 1, wherein:

the latch pin is biased toward the first latch pin position; and

actuation of each of the plurality of actuators when the latch pin is in the first latch pin position and supporting the swing arm assembly in the first swing arm position results in an initial movement of the latch pin away from the swing arm assembly.

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

a retaining pin, wherein the latch pin is engaged with the retaining pin in the first latch pin position and wherein the latch pin is not engaged with the retaining pin in the second latch pin position.

8. The power tool of claim 7, wherein the retaining pin is fixedly attached to the swing arm assembly.

9. The power tool of claim 1, wherein the latch pin further comprises a hook portion that releasably engages a retaining pin attached to the swing arm assembly when the swing arm assembly is in the first swing arm assembly position and the latch pin is in the first latch pin position.