Horizontally supported planar surfaces – Combined – With heating or air moving means
Reexamination Certificate
2002-09-10
2004-10-12
Chen, Jose V. (Department: 3637)
Horizontally supported planar surfaces
Combined
With heating or air moving means
Reexamination Certificate
active
06802266
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a work table, more particularly to a work table with a sawdust collecting mechanism.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional work table is shown to include a stand
1
, a workpiece-supporting box
2
, a working panel
3
, and a suctioning device
4
.
As illustrated, the box
2
includes a bottom plate
201
that is disposed on the stand
1
and that has a peripheral edge, and a peripheral wall
202
that extends uprightly from the peripheral edge of the bottom plate
201
to define a receiving chamber
203
. The bottom plate
201
is formed with an outlet port
204
.
The working panel
3
is disposed on the peripheral wall
202
to cover the receiving chamber
203
, and is formed with a plurality of equidistantly spaced apart apertures
303
that are in fluid communication with the receiving chamber
203
.
The suctioning device
4
includes an air conduit
403
, a blower unit
401
, and a sawdust container
407
. The air conduit
403
has a first end connected to the outlet port
204
of the box
2
and a second end connected to an inlet of the blower
401
. The sawdust container
407
is connected to an outlet of the blower
401
via a piping in such a manner that when the blower
401
is actuated, sawdust resulting from an abrasive operation performed on the working panel
3
is collected in the sawdust container
407
via the apertures
303
in the working panel
3
and the outlet port
204
in the bottom plate
201
. Preferably, an air-filtering bag
406
is mounted on a top end of the sawdust container
407
via a fastener belt
405
to enhance collection of the sawdust in the sawdust container
407
.
One disadvantage of the aforementioned conventional work table resides in that since there is no sawdust guiding means provided in the receiving chamber
203
for guiding the sawdust toward the outlet port
204
, the sawdust tends to accumulate at corners of the box
2
.
SUMMARY OF THE INVENTION
Therefore, the object of this invention is to provide a work table having a sawdust collecting mechanism so as to eliminate the aforesaid disadvantage.
Accordingly, a work table of the present invention includes: a stand; a workpiece-supporting box including a bottom plate disposed on the stand and having a peripheral edge, and a peripheral wall extending upwardly from the peripheral edge of the bottom plate to define a receiving chamber, the bottom plate being formed with an outlet port; a sawdust collecting mechanism including opposing left and right guide plates extending inclinedly and downwardly from the peripheral wall toward the outlet port, the left and right guide plates having opposing end walls distal from the peripheral wall and cooperating with the bottom plate to define a groove that is in fluid communication with the outlet port, the sawdust collecting mechanism further including a distributor member of an inverted U-shaped cross section disposed in the groove, cooperating with the bottom plate to confine a lower chamber in fluid communication with the outlet port, and cooperating with the left and right guide plates and the peripheral wall to confine an upper chamber above the lower chamber, the distributor member being formed with a plurality of spaced apart entrance holes that fluidly communicate the upper and lower chambers, and a working panel disposed on the peripheral wall, covering the upper chamber and formed with a plurality of spaced apart apertures that are in fluid communication with the upper chamber; a suctioning device including a blower with an inlet and an outlet, a sawdust collecting container connected to the outlet of the blower, and an air conduit having a first end connected to the outlet port in the bottom plate, a second end connected to the inlet of the blower, and a branch disposed between the first and second ends and having a free end; and a suction-switching unit including a cap detachably mounted on the free end of the branch for sealing the branch so as to prevent air from flowing therethrough upon actuation of the blower, and a blind mounted movably on the air conduit between the outlet port in the bottom plate and the branch, and movable between a blocking position, in which the blind extends into the air conduit to prevent air from being introduced into the workpiece-supporting box and through the outlet port upon actuation of the blower, and a non-blocking position, in which the blind retracts from the air conduit so as to permit entry of air into the box and through the outlet upon actuation of the blower and so as to permit collection of sawdust resulting from an abrasive operation performed on the working panel in the sawdust collecting container via the apertures in the working panel, the upper and lower chamber, the outlet port in the bottom plate, and the air conduit.
REFERENCES:
patent: 2341628 (1944-02-01), Koweindl
patent: 2709954 (1955-06-01), Baker
patent: 3222051 (1965-12-01), Bevilacqua
patent: 4324487 (1982-04-01), Nishihama
patent: 5487536 (1996-01-01), McEachin
patent: 5716267 (1998-02-01), Hambleton et al.
patent: 6241597 (2001-06-01), Chiang et al.
patent: 6444002 (2002-09-01), Mai
patent: 6572091 (2003-06-01), Kimble
patent: 6694892 (2004-02-01), Lin et al.
patent: 6698360 (2004-03-01), Park
patent: 6732624 (2004-05-01), Gaubatz
patent: 2109716 (1983-06-01), None
patent: 2120141 (1983-11-01), None
Chen José V.
Townsend and Townsend / and Crew LLP
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