TABLE SAW WITH POSITIVE LOCKING MECHANISM

• US 20110048189A1
• Filed: 08/26/2009
• Published: 03/03/2011
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: Credo Technology Corporation (Robert Bosch GmbH), Robert Bosch GmbH
• Original Assignee: Credo Technology Corporation (Robert Bosch GmbH), Robert Bosch GmbH
• Inventors: Oberheim, Stephen C., Groth, Brady J., Chung, Brian Hyuk Joon
• Granted Patent: US 10,029,386 B2
• Time in Patent Office: Days
• US Class Current: 83/58
• CPC Class Codes: B23D 45/06 with a circular saw blade arranged underneath a stationary work-table
• CPC Class Codes: B23D 47/08 of devices for bringing the circular saw blade to the workpiece or removing same therefrom
• CPC Class Codes: B23Q 11/0089 actuating operator protecting means, e.g. closing a cover element, producing an alarm signal
• CPC Class Codes: B23Q 11/06 Safety devices for circular cutters
• CPC Class Codes: B26D 7/22 Safety devices specially adapted for cutting machines safety devices in general F16P
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: Y10S 83/01 Safety devices
• 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 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 pivotable between a first position engaged with the swing arm assembly and a second position whereat the latch is not engaged with the swing arm assembly, an actuator configured to pivot the latch pin from the first position to the second position and to force the swing arm assembly away from the first swing arm position and toward the second swing arm position, and a control system configured to actuate the actuator in response to a sensed condition.

Claims

1. A table saw 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 pivotable between a first position whereat the latch pin is engaged with the swing arm assembly and a second position whereat the latch is not engaged with the swing arm assembly;

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

a control system configured to actuate the actuator in response to a sensed condition.

2. The table saw of claim 1, wherein:

the actuator comprises a pin member movable along a first axis; and

the latch pin is pivotable within a plane in which the first axis extends.

3. The table saw of claim 1, wherein the latch pin comprises an actuating ramp, the table saw further comprising:

a biasing member configured to bias the latch pin toward the first position whereat the actuating ramp is axially aligned with the actuator.

4. The table saw of claim 3, wherein the actuation ramp is configured to transfer an axial force from the actuator into a rotational force.

5. The table saw of claim 3, wherein the actuation ramp is located within a bore extending through the latch pin.

6. The table saw of claim 3, the latch pin further comprising an orientation feature for rotational alignment with the actuator.

7. A power tool, comprising:

a latch hold mechanism;

a swing arm movable along a swing arm path between a first swing arm position adjacent the latch hold mechanism and a second swing arm position spaced apart from the latch hold mechanism;

a latch pin movable between a first latch pin position whereat the swing arm is maintained at the first swing arm position and a second latch pin position whereat the swing arm is not maintained at the first swing arm position;

an actuating device configured to transfer a first force to the latch pin to bias the latch pin in a direction toward the second latch position, and, after transferring the first force, further configured to transfer a second force to the swing arm; and

a control system configured to control the actuating device.

8. The power tool of claim 7, wherein the latch hold mechanism is mounted on the swing arm.

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

a biasing member configured to bias the latch hold mechanism in a direction away from the swing arm.

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

a biasing member configured to bias the latch hold mechanism in a direction toward the swing arm when the swing arm is maintained at the first swing arm position.

11. The power tool of claim 7, wherein the latch pin is movable axially between the first latch pin position and the second latch pin position.

12. The power tool of claim 7, wherein the latch pin is pivotable between the first latch pin position and the second latch pin position.

13. The power tool of claim 12, wherein:

the actuator comprises a pin member movable along a first axis; and

the latch pin is pivotable within a plane in which the first axis extends.

14. The power tool of claim 12, wherein the latch pin comprises an actuating ramp, the table saw further comprising:

a biasing member configured to bias the latch pin toward the first position whereat the actuating ramp is axially aligned with the actuator.

15. The power tool of claim 14, wherein the actuation ramp is configured to transfer an axial force from the actuator into a rotational force.

16. The power tool of claim 14, wherein the actuation ramp is located at a side portion of the latch pin.

17. The power tool of claim 14, the latch pin further comprising an orientation feature for rotational alignment with the actuator.