Table saw with belt stop

• US 9,079,258 B2
• Filed: 08/26/2009
• Issued: 07/14/2015
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: Credo Technology Corporation, Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Chung, Brian Hyuk Joon
• Primary Examiner(s): Dexter, Clark F
• Application Number:
  US12/547,977
• Publication Number:
  US 20110048190A1
• Time in Patent Office: 2,148 Days
• Field of Search: 834/772, 83/58, 83/62, 83/621, 835/64, 83D/IG.1, 144/356, 144/382, 144/420, 144/427
• US Class Current: 1/1
• CPC Class Codes: B23D 45/062 the saw blade being adjustable according to depth or angle of cut
• CPC Class Codes: B23D 45/063 the carriage performing a vertical movement only
• 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: 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: B26D 7/22 Safety devices specially adapted for cutting machines safety devices in general F16P
• CPC Class Codes: B27B 5/29 Details; Component parts; Accessories
• 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 table saw in one embodiment includes a work-piece support surface, a shaping device support shaft automatically retractable along a retraction path to a location beneath the work-piece support surface in response to a sensed condition, a belt positioned across the retraction path, and a control system configured to cause the shaping device support shaft to retract along the retraction path in response to a sensed condition.

Claims

1. A table saw comprising:

a work piece support surface;

a swing arm assembly including a shaping device support shaft, the swing arm assembly automatically retractable along a retraction path from a proximate position whereat the support shaft is proximate to the work piece support surface to a distal position whereat the support shaft is distal to the work piece support surface;

a stop belt positioned across the retraction path; and

a control system configured to cause the swing arm assembly to retract along the retraction path in response to a sensed condition.

2. The table saw of claim 1, wherein the stop belt comprises a stretchable material.

3. The table saw of claim 2, wherein the stretchable material comprises a NYLON material.

4. The table saw of claim 1, wherein the retraction path is substantially linear.

5. The table saw of claim 1, wherein the retraction path is curved.

6. The table saw of claim 5, further comprising:

a latch hold mechanism;

a swing arm movable along the retraction path, the shaping device support shaft rotatably supported by the swing arm;

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

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.

7. The table saw of claim 6, further comprising:

a frame supporting the swing arm, wherein the stop belt comprises a first anchor portion fixedly attached to the latch hold mechanism and a second anchor portion fixedly attached to the frame.

8. The table saw of claim 7, wherein the first anchor portion is positioned closer to the work piece support surface than the second anchor portion.

9. The table saw of claim 6, further comprising:

a carriage supported by the frame and supporting the swing arm, the carriage positionable at a plurality of heights with respect to the frame, wherein the retraction path is one of a plurality of retraction paths, each of the plurality of retraction paths associated with a respective one of the plurality of heights, and the stop belt is positioned to intersect each of the plurality of retraction paths.

10. A table saw comprising:

a work piece support surface;

a swing arm movable along a swing arm path from a first swing arm position whereat an arbor shaft rotatably supported by the swing arm is positioned proximate to the work piece support surface and a second swing arm position whereat the arbor shaft is distal to the work piece support surface;

a stop belt positioned across the swing arm path; and

a control system configured to cause the swing arm to move along the swing arm path in response to a sensed condition.

11. The table saw of claim 10, wherein the stop belt comprises a stretchable material.

12. The table saw of claim 11, wherein the stretchable material comprises a NYLON material.

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

a 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; and

an actuating device configured to generate a first force 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.

14. The table saw of claim 13, further comprising:

a frame supporting the swing arm, wherein the stop belt comprises a first anchor portion fixedly attached to the latch hold mechanism and a second anchor portion fixedly attached to the frame.

15. The table saw of claim 14, wherein the first anchor portion is positioned closer to the work piece support surface than the second anchor portion.