Table saw throat plates and table saws including the same

• US 7,997,176 B2
• Filed: 05/20/2009
• Issued: 08/16/2011
• Est. Priority Date: 03/31/2005
• Status: Active Grant

• Current Assignee: Sawstop Holding LLC
• Original Assignee: SD3, LLC
• Inventors: Fanning, David A., Gass, Stephen F., Fulmer, J. David
• Primary Examiner(s): Alie; Ghassem
• Application Number:
  US12/454,730
• Publication Number:
  US 20090293692A1
• Time in Patent Office: 818 Days
• Field of Search: 834/713, 835/81, 834/711, 834/771, 834/71, 836/985.1, 834/72, 834/73, 834/77, 834/687, 834/66, 835/221.8, 834/772, 834/78, 834/402, 144/1.1, 144/286.1, 144/286.5, 220/3.5, 295/57, 295/25, 295/256.5, 403/405.1, 403/408.1, 403/409.1
• US Class Current: 83/471.3
• CPC Class Codes: B23D 47/02 of frames; of guiding arrangements for work-table or saw-carrier
• CPC Class Codes: B23D 47/025 of tables
• CPC Class Codes: Y10T 83/732 With guard
• 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 83/773 Work-support includes passageway for tool [e.g., slotted table]
• CPC Class Codes: Y10T 83/7734 With guard for tool

Abstract

Throat plates for table saws and table saws including the same are disclosed. In some embodiments, the throat plates and/or saws include at least one securement mechanism adapted to secure and prevent inadvertent removal of the throat plate from the throat of the saw. In some embodiments, at least one of the securement mechanisms also provides a height adjustment mechanism and/or prevents vertical removal of the throat plate. In some embodiments, the throat plate includes an accessory mounting port that provides a portal for accessories, including safety accessories, to extend through the plate from beneath the table of the saw. In some embodiments, the port extends from the plate'"'"'s outer perimeter to divide the plate'"'"'s rear end portion into a pair of spaced-apart members. In some embodiments, these members are independently secured to the table saw and retained apart from each other by one or more of the securement mechanisms.

Claims

1. A table saw comprising:

a blade;

a table defining a work surface;

an opening in the table through which the blade is selectively raised and lowered;

a throat plate configured to be removably positioned within the opening, where the throat plate includes a perimeter;

a support structure configured to support the throat plate;

a slot in the throat plate through which the blade can extend from beneath the table;

an accessory mounting port extending through the throat plate to provide an opening for a table saw accessory to extend through the throat plate from beneath the table, where the accessory mounting port intersects with the slot and with the perimeter of the throat plate; and

a securement mechanism adjacent the accessory mounting port and adapted to secure the rear end region of the throat plate in the saw, where the securement mechanism biases the accessory mounting port open.

2. The table saw of claim 1, where the securement mechanism comprises overlapping screw heads.

3. The table saw of claim 1, where the securement mechanism comprises retainers with heads having contact surfaces.

4. The table saw of claim 3, where at least one retainer extends from a bottom surface of the throat plate, and where that retainer is configured so that the distance from the bottom surface to the retainer'"'"'s contact surface is adjustable.

5. The table saw of claim 4, where the retainer that extends from a bottom surface of the throat plate is configured so that the distance from the bottom surface of the throat plate to the retainer'"'"'s contact surface is adjustable by accessing the retainer from adjacent the top surface of the throat plate.

6. The table saw of claim 4, where the retainer that extends from a bottom surface of the throat plate includes a threaded shaft, and where the distance from the bottom surface of the throat plate to the retainer'"'"'s contact surface is adjustable by turning the threaded shaft.

7. The table saw of claim 6, where the threaded shaft is accessible from adjacent the top surface of the throat plate.

8. The table saw of claim 1, where the securement mechanism comprises spaced-apart members extending generally away from a bottom surface of the throat plate and spaced-apart members extending generally away from a surface of the support structure, where the spaced-apart members extending generally away from a surface of the support structure are configured to bias apart the spaced-apart members extending generally away from a bottom surface of the throat plate when the throat plate is installed in the opening in the table.

9. The table saw of claim 8, where the spaced-apart members extending generally away from a surface of the support structure are configured to bias apart the spaced-apart members extending generally away from a bottom surface of the throat plate through interference.