Splitter and blade guard assembly

• US 4,625,604 A
• Filed: 06/10/1985
• Issued: 12/02/1986
• Est. Priority Date: 06/10/1985
• Status: Expired due to Term

• Current Assignee: Hirsh Industries, LLC
• Original Assignee: The Hirsh Co. (Knape & VOGT Manufacturing Company)
• Inventors: Sylvan, Richard, Handler, Milton E., Baisch, Herbert
• Primary Examiner(s): Meister, James M.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/741,746
• Time in Patent Office: 540 Days
• Field of Search: 83/102.1, 83/478, 83/472, 83/473, 83/477.1, 83/477.2, 83/574, 83/DIG. 1
• US Class Current: 83/102.1
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: B27G 19/08 Accessories for keeping open the saw kerf, e.g. riving knives or wedge plates
• CPC Class Codes: Y10S 83/01 Safety devices
• CPC Class Codes: Y10T 83/2077 By kerf entering guide
• CPC Class Codes: Y10T 83/7734 With guard for tool

Abstract

A guide member projects upwardly from the splitter, and an extension bracket is pivotally connected to the splitter and defines a guide slot for receiving the guide member. The splitter includes a leg having a projecting foot defining a notch between the foot and a bottom portion of the splitter whereby the leg may be disposed within a slot in a mounting plate so that the notch receives a portion of the mounting plate. The mounting plate includes a tab angled downwardly at one side of the slot for engaging a side of the foot.

Claims

1. In a splitter and blade guard assembly for use with a table top for supporting a portable power circular saw, said assembly having (1) a mounting plate for mounting said saw on said table top and having a first slot for receiving the circular saw blade of said saw;

(2) a splitter for entering into the workpiece kerf as the workpiece is fed past said splitter;

(3) splitter mounting means for mounting said splitter to said table top in alignment with said mounting plate first slot;

(4) an extension bracket pivotally mounted to said splitter; and

(5) a guard hood pivotally mounted to said extension bracket to accommodate pivoting movement relative to said extension bracket and having a distal end portion extending over said mounting plate first slot;

the improvement comprising;

(A) said splitter including an upwardly projecting guide member; and

(B) said extension bracket defining a guide slot for receiving said guide member to prevent lateral movement of said extension bracket as said extension bracket pivots upwardly while permitting said guard hood to pivot relative to said extension bracket for accommodating the workpiece.

2. The assembly in accordance with claim 1 in which said mounting plate defines a second slot and in which said splitter includes a leg having a projecting foot defining a notch between said foot and the bottom of said splitter whereby said leg may be disposed within said second slot with said notch receiving a portion of said mounting plate.

3. The assembly in accordance with claim 2 in which said mounting plate includes a tab angled downwardly at one side of said second slot for engaging a side of said foot.

4. The assembly in accordance with claim 3 in which said tab is angled at about 67°

from the surface of said mounting plate.

5. The assembly in accordance with claim 1

in which said splitter includes a distal end defining an arcuate recess for accommodating the saw blade of said saw;

in which said assembly further includes at least one workpiece-gripping pawl pivotally mounted to said splitter between said guide member and said recess; and

in which said assembly further includes a spring for biasing said pawl toward said mounting plate.

6. The assembly in accordance with claim 5 in which a portion of said pawl overhangs said mounting plate adjacent said first slot.

7. The assembly in accordance with claim 1 in which a portion of said splitter projects over said first slot.

8. In a splitter and blade guard assembly for use with a table top for supporting a portable power circular saw, said assembly having (1) a mounting plate for mounting said saw on said table top and having a first slot for receiving the circular saw blade of said saw;

(2) a splitter for entering into the workpiece kerf as the workpiece is fed past said splitter;

(3) splitter mounting means for mounting said splitter to said table top in alignment with said mounting plate first slot;

(4) an extension bracket pivotally mounted to said splitter; and

(5) a guard hood pivotally mounted to said extension bracket and extending over said mounting plate first slot;

the improvement comprising;

(A) said mounting plate defining a second slot and including a tab angled downwardly at one side of said second slot;

(B) said splitter being a plate-like member including (1) an upwardly projecting guide member, (2) a downwardly projecting extension for engaging said splitter mounting means, and (3) a leg having a projecting foot with a length less than the length of said second slot, said foot and an adjacent bottom portion of said splitter together defining a notch between said foot and the bottom portion of said splitter whereby said leg may be lowered through said second slot and disposed adjacent said second slot with said notch receiving a portion of said mounting plate; and

(C) said extension bracket having a horizontally disposed portion defining a guide slot for receiving said upwardly projecting guide member of said splitter.

9. The assembly in accordance with claim 8 in which said downwardly projecting extension of said splitter includes:

a first angle bracket defining a bore therethrough, a second angle bracket for being mounted to the underside of said table top and defining an elongate aperture therethrough, a carriage bolt for extending through said first angle bracket bore and said second angle bracket elongate aperture with the square neck portion of said carriage bolt received within said elongate aperture of said second bracket for preventing rotation thereof while accommodating lateral displacement thereof, and a knob or nut threadingly engaged with the distal end of said carriage bolt adjacent said first angle bracket.

10. The assembly in accordance with claim 8 in which said upwardly projecting guide member is unitary with said splitter.

11. The assembly in accordance with claim 8 in which said splitter includes a distal end defining an arcuate recess for accommodating the saw blade of said saw, said distal end projecting over said first slot in said mounting plate.

12. The assembly in accordance with claim 11 in which said assembly further includes at least one workpiece-gripping pawl pivotally mounted to said splitter between said guide member and said recess and in which said assembly further includes a spring for biasing said pawl toward said mounting plate.

13. The assembly in accordance with claim 12 in which said pawl has downwardly directed teeth for engaging a workpiece when present and for engaging the upwardly facing surface of said mounting plate in the absence of said workpiece.