TABLE SAW WITH ALIGNMENT PLATE

• US 20110048206A1
• 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
• Original Assignee: Credo Technology Corporation, Robert Bosch GmbH
• Inventors: Doumani, Robert S., Chung, Brian Hyuk Joon
• Granted Patent: US 8,316,748 B2
• Time in Patent Office: Days
• US Class Current: 83/477.2
• 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: 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 83/7734 With guard for tool
• CPC Class Codes: Y10T 83/8749 By pivotal motion

Abstract

A power tool in one embodiment includes a latch hold mechanism, a swing arm pivotable about a pivot along a swing arm path, at least one alignment plate positioned adjacent to a portion of the swing arm when the swing arm is in a first position, a latch pin movable between a first latch pin position whereat the swing arm is biased against the at least one alignment plate and a second latch pin position whereat the swing arm is not biased by the latch pin, an actuating device configured to transfer a force to the swing arm resulting in a bias on the latch pin in a direction toward the second latch pin position, and a control system configured to control the actuating device to transfer a force to the swing arm when the swing arm is maintained at the first swing arm position.

Claims

1. A table saw, comprising:

a latch hold mechanism;

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

at least one alignment plate positioned adjacent to a portion of the swing arm when the swing arm is in the first position;

a latch pin movable between a first latch pin position whereat the swing arm is biased against the at least one alignment plate and a second latch pin position whereat the swing arm is not biased by the latch pin;

an actuating device configured to transfer a force to the swing arm when the swing arm is at the first swing arm position resulting in a bias on the latch pin in a direction toward the second latch pin position; and

a control system configured to control the actuating device to transfer a force to the swing arm when the swing arm is maintained at the first swing arm position 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, wherein:

the at least one alignment plate comprises a first alignment plate, a second alignment plate, and a third alignment plate;

the swing arm comprises a fourth alignment plate positioned in opposition to the first alignment plate when the swing arm is in the first position;

the swing arm comprises a fifth alignment plate positioned in opposition to the second alignment plate when the swing arm is in the first position; and

the swing arm comprises a sixth alignment plate positioned in opposition to the third alignment plate when the swing arm is in the first position.

3. The table saw of claim 1, further comprising a carriage movable with respect to a work piece support surface, wherein:

the swing arm is pivotably supported by the carriage; and

the at least one alignment plate is configured to be fixedly attached to the carriage in a plurality of orientations with respect to the work piece support surface.

4. The table saw of claim 3, wherein the table saw comprises an x-axis, a y-axis and a z-axis, and the at least one alignment plate is configured to align the swing arm about the z-axis.

5. The table saw of claim 4, wherein:

the at least one alignment plate comprises a first alignment plate, a second alignment plate, and a third alignment plate;

the swing arm comprises a fourth alignment plate positioned in opposition to the first alignment plate when the swing arm is in the first position;

the swing arm comprises a fifth alignment plate positioned in opposition to the second alignment plate when the swing arm is in the first position; and

the swing arm comprises a sixth alignment plate positioned in opposition to the third alignment plate when the swing arm is in the first position.

6. The table saw of claim 5, wherein at least one of the first alignment plate, the second alignment plate, the third alignment plate, the fourth alignment plate, the fifth alignment plate, and the sixth alignment plate is angled with respect to a plane defined by the z-axis and the x-axis.

7. The table saw of claim 1, wherein the swing arm assembly comprises a recess with an upper surface, and the latch pin comprises a rounded contact portion, the table saw further comprising:

a biasing member configured to bias the rounded contact portion into contact with the upper surface of the recess.

8. The table saw of claim 7, wherein the rounded contact portion comprises a wheel.

9. A power tool, comprising:

a latch hold mechanism;

an alignment member;

a swing arm movable along a swing arm path between a first swing arm position in contact with the alignment member and a second swing arm position spaced apart from the alignment member;

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 pin 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.

10. The power tool of claim 9, wherein the latch hold mechanism is mounted on the swing arm.

11. The power tool of claim 9, wherein:

the alignment member comprises a first alignment plate, a second alignment plate, and a third alignment plate;

the swing arm comprises a fourth alignment plate positioned in opposition to the first alignment plate when the swing arm is in the first position;

the swing arm comprises a fifth alignment plate positioned in opposition to the second alignment plate when the swing arm is in the first position; and

the swing arm comprises a sixth alignment plate positioned in opposition to the third alignment plate when the swing arm is in the first position.

12. The power tool of claim 9, further comprising a carriage movable with respect to a work piece support surface, wherein:

the swing arm is pivotably supported by the carriage; and

the alignment member is configured to be fixedly attached to the carriage in a plurality of orientations with respect to the work piece support surface.

13. The power tool of claim 12, wherein the power tool comprises an x-axis, a y-axis and a z-axis, and the alignment member is configured to align the swing arm about the z-axis.

14. The power tool of claim 13, wherein:

the alignment member comprises a first alignment plate, a second alignment plate, and a third alignment plate;

the swing arm comprises a fourth alignment plate positioned in opposition to the first alignment plate when the swing arm is in the first position;

the swing arm comprises a fifth alignment plate positioned in opposition to the second alignment plate when the swing arm is in the first position; and

the swing arm comprises a sixth alignment plate positioned in opposition to the third alignment plate when the swing arm is in the first position.

15. The power tool of claim 14, wherein at least one of the first alignment plate, the second alignment plate, the third alignment plate, the fourth alignment plate, the fifth alignment plate, and the sixth alignment plate is angled with respect to a plane defined by the z-axis and the x-axis.

16. The power tool of claim 9, wherein the swing arm assembly comprises a recess with an upper surface, and the latch pin comprises a rounded contact portion, the power tool further comprising:

a biasing member configured to bias the rounded contact portion into contact with the upper surface of the recess.

17. The power tool of claim 16, wherein the rounded contact portion comprises a wheel.

18. The power tool of claim 9, wherein the latch pin comprises an actuating ramp and a contacting portion, the power tool further comprising:

a biasing member configured to bias the latch pin toward the first latch pin position whereat the actuating ramp is axially aligned with the actuator and the contacting portion is in contact with the swing arm.

19. The power tool of claim 18, wherein the contact portion and the swing arm are configured to force the swing arm against the alignment member when the contacting portion is biased into contact with the swing arm.