Table saw with two stage table extension system

Patent metadata

Field	Value
Publication number	US-10695849-B2
Application number	US-201815898957-A
Country	US
Kind code	B2
Filing date	Feb 19, 2018
Priority date	Feb 19, 2018
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A table saw includes a base assembly, a saw assembly, which is supported by the base assembly and includes a saw, and a table assembly supported by the base assembly. The table assembly includes a rip fence, a table extension system, and a table top defining an opening through which the saw extends. The table extension system includes a first stage assembly supported by the table top and movable relative to the table top between a first stage retracted position and a first stage extended position, and a second stage assembly supported by the first stage assembly and movable relative to the first stage assembly between a second stage retracted position and a second stage extended position. The rip fence is supported by and movable relative to the second stage assembly.

First claim

What is claimed is:

1. A table saw comprising:
a base assembly;
a saw assembly supported by the base assembly, the saw assembly including a saw; and
a table assembly supported by the base assembly, the table assembly comprising:
a table top defining an opening through which the saw extends;
a table extension system comprising:
a first stage assembly supported by the table top and movable as a unit relative to the table top between a first stage retracted position and a first stage extended position; and
a second stage assembly supported by the first stage assembly and movable as a unit relative to the first stage assembly between a second stage retracted position and a second stage extended position; and

a rip fence supported by and movable relative to the second stage assembly,

wherein:
the saw defines a cutting plane;
the first stage assembly is movable relative to the table top in a first direction perpendicular to the cutting plane; and
the second stage assembly is movable relative to the first stage assembly in the first direction the table assembly further comprises two rail supports supported on opposite sides of the table top; and
the first stage assembly comprises two first stage rails, each of which is supported by a respective one of the two rail supports and is configured to be movable relative to the two rail supports in the first direction.

2. The table saw of claim 1 , the second stage assembly comprising:
two second stage rails, each of which is supported by a respective one of the two first stage rails and is configured to be movable relative to the respective one of the two first stage rails in the first direction, the rip fence being supported by the two second stage rails.

3. The table saw of claim 2 , the table extension system further comprising:
a second stage lock mechanism having a locked state in which the second stage assembly is fixed relative to the first stage assembly and an unlocked state in which the second stage assembly is movable relative to the first stage assembly in the first direction.

4. The table saw of claim 3 , wherein:
at least one second stage rail of the two second stage rails comprises a side wall, a first boss extending from the side wall, and a second boss extending from the side wall; and
the second stage lock mechanism includes a locking member configured to interact with the first boss to lock the second stage assembly in the second stage extended position and to interact with the second boss to lock the second stage assembly in the second stage retracted position.

5. The table saw of claim 4 , wherein:
at least one first stage rail of the two first stage rails includes a first portion that defines an interior channel extending along a longitudinal length of the at least one first stage rail; and
the at least one second stage rail further comprises a guide boss extending from the side wall and which is positioned in the interior channel, the guide boss being movable within the interior channel in the first direction and the at least one second stage rail being pivotable about the guide boss when the second stage lock mechanism is unlocked.

6. The table saw of claim 5 , wherein:
the first portion of the at least one first stage rail defines a first notch that opens into the interior channel and a second notch that opens into the interior channel;
the first boss is configured be positioned in the second notch so as to interact with the first portion of the at least one first stage rail to disable movement of the second stage assembly in the first direction when the second stage assembly is in the second stage extended position; and
the first boss is configured to be positioned in the first notch and the second boss is configured to be positioned in the second notch such that the first and second bosses interact with the first portion of the at least one first stage rail to disable movement of the second stage assembly in the first direction when the second stage assembly is in the second stage retracted position.

7. The table saw of claim 6 , wherein, when the second stage lock mechanism is unlocked, the at second stage assembly is pivotable relative to the first stage assembly about the guide boss from a first position, in which at least one of the first and second bosses is in at least one of the first and second notches, to a second position, in which the first and second notches are not in either of the first and second notches and the second stage assembly is movable in the first direction between the second stage retracted and second stage extended positions.

8. The table saw of claim 2 , wherein:
the first stage assembly further comprises a cross member connecting the two first stage rails to one another in such a way that the two first stage rails and the cross member move together as a first rigid assembly; and
the second stage assembly further comprises an extension table connecting the two second stages to one another in such a way that the two second stage rails and the extension table move together as a second rigid assembly.

9. The table saw of claim 8 , wherein:
the table top includes a workpiece support surface that defines a first plane;
the extension table includes a planar surface that is coplanar with the first plane; and
the cross member has an L-shaped cross-section, and an uppermost edge of the L-shaped cross-section is in the first plane.

10. The table saw of claim 9 , wherein, in the second stage retracted position, a portion of the extension table is directly above a portion of the cross member.

11. A table extension system for a table saw, comprising:
a first stage assembly configured to be supported by a table top of the table saw, the first stage assembly movable as a unit relative to the table top between a first stage retracted position and a first stage extended position; and
a second stage assembly supported by the first stage assembly and movable as a unit relative to the first stage assembly between a second stage retracted position and a second stage extended position, the second stage assembly configured to support a rip fence of the table saw in such a way that the rip fence is movable relative to the second stage assembly,

wherein:
the first stage assembly is movable relative to the table top in a first direction perpendicular to a cutting plane defined by a saw of the table saw;
the second stage assembly is movable relative to the first stage assembly in the first direction; and
the first stage assembly comprises two first stage rails, each of which is supported by a respective one of two rail supports that are supported on opposite sides of the table top, each of the two first stage rails being movable relative to the two rail supports in the first direction.

12. The table extension system of claim 11 , the second stage assembly comprising:
two second stage rails, each of which is supported by a respective one of the two first stage rails and is configured to be movable relative to the respective one of the two first stage rails in the first direction, the two second stage rails configured to support the rip fence.

13. The table extension system of claim 12 , further comprising:
a second stage lock mechanism having a locked state in which the second stage assembly is fixed relative to the first stage assembly and an unlocked state in which the second stage assembly is movable relative to the first stage assembly in the first direction.

14. The table extension system of claim 13 , wherein:
at least one second stage rail of the two second stage rails comprises a side wall, a first bo

Assignees

• Bosch Tool Corp
• Bosch Gmbh Robert

Inventors

• Frolov Andrew

Classifications

• B27B5/16

  Saw benches (B27B15/06 takes precedence) · CPC title

• B23D47/025 Primary

  of tables · CPC title

• B23D45/06 Primary

  with a circular saw blade arranged underneath a stationary work-table · CPC title

• B27B5/29

  Details; Component parts; Accessories · CPC title

• B27B5/06

  for dividing plates in parts of determined size, e.g. panels · CPC title