Woodworking machines with overmolded arbors

• US 7,836,804 B2
• Filed: 12/29/2006
• Issued: 11/23/2010
• Est. Priority Date: 08/20/2003
• Status: Active Grant

• Current Assignee: Sawstop Holding LLC
• Original Assignee: SD3, LLC
• Inventors: Gass, Stephen F.
• Primary Examiner(s): Alie; Ghassem
• Application Number:
  US11/647,676
• Publication Number:
  US 20070101842A1
• Time in Patent Office: 1,425 Days
• Field of Search: 83/621, 83/58, 834/713, 834/771, 834/90, 833/97, 835/89, 835/81, 833/971, 834/772, 83D/IG.1, 836/30, 832/97, 836/44, 324/678, 324/658, 324/660, 324/725, 324/686, 192/55.2, 192/55.7, 144/2.1, 144/3.1
• US Class Current: 83/58
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: F16P 3/12 with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine F16P3/08 takes precedence
• 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 83/7697 Tool angularly adjustable relative to work-support
• CPC Class Codes: Y10T 83/7726 By movement of the tool
• CPC Class Codes: Y10T 83/7788 Tool carrier oscillated or rotated

Abstract

Power equipment with various safety systems is disclosed. Table saws with safety systems and/or blade retraction are disclosed. Over-molded arbors are disclosed, including arbors with prepreg over-molding. An electrically non-conductive material may be disposed to electrically insulate the arbor. The electrically non-conductive material may be made from fiber organized into a pattern.

Claims

1. A woodworking machine comprising:

a cutter;

an arbor on which the cutter is mounted;

an electrically non-conductive material over-molded on at least a portion of the arbor to electrically insulate the arbor, where the material comprises fiber organized into a pattern;

a detection system adapted to detect a dangerous condition between a user and the cutter; and

a reaction system adapted to perform a specified action to mitigate the dangerous condition upon detection of the dangerous condition by the detection system.

2. The woodworking machine of claim 1 where the detection system imparts an electrical signal on the arbor.

3. The woodworking machine of claim 1 where the material comprises prepreg.

4. The woodworking machine of claim 3 where the prepreg includes resin impregnated glass fiber cloth.

5. The woodworking machine of claim 4 where the resin is epoxy.

6. The woodworking machine of claim 1 where the material is a thermoset.

7. The woodworking machine of claim 1 where the material is fiberglass.

8. The woodworking machine of claim 1 where the material comprises a fabric wrapped a plurality of times around at least a portion of the arbor and hardened resin.

9. The woodworking machine of claim 1 where at least a portion of the arbor under the material has a non-smooth surface.

10. The woodworking machine of claim 1 where at least a portion of the arbor under the material is roughened.

11. The woodworking machine of claim 1 where at least a portion of the arbor under the material is patterned.

12. The woodworking machine of claim 1 where the woodworking machine includes a bearing to support the arbor and where the material provides a bearing seat for the bearing.