Woodworking – Feeder or presser
Reexamination Certificate
2000-02-23
2001-04-24
Tolan, Ed (Department: 3725)
Woodworking
Feeder or presser
C144S245100, C144S253100
Reexamination Certificate
active
06220316
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a workpiece feeding device used to feed a workpiece along a work path on a worktable for a cutting tool to work thereon, more particularly to a repositionable supporting apparatus for a workpiece feeding device.
2. Description of the Related Art
Referring to
FIGS. 1 and 2
, a conventional supporting apparatus for a workpiece feeding device
6
is shown to include a base
1
which is provided with a coupling member
1
a
secured thereon by a bolt
1
b
. An upright post
2
is disposed on the coupling member
1
a
so as to be rotatable relative to the base
1
upon releasing the coupling member
1
a
by operating the bolt
1
b
. A second coupling member
3
is sleeved on the upright post
2
. A guiding post
4
is disposed on the second coupling member
3
parallel to the upright post
3
, and has a first operating lever
4
a
which is operable to move the second coupling member
3
along the guiding post
4
. A horizontal post
5
is disposed on the second coupling member
3
, and has one end provided with a second operating lever
5
a
which is operable to move the horizontal post
5
in a horizontal direction relative to the second coupling member
3
, and the other end to carry the workpiece feeding device
6
. The base
1
is fixed on a worktable (A) such that a bottom of the workpiece feeding device
6
is proximate to the worktable (A). A workpiece can be placed to abut against an abutting plate (C) on the worktable (A) adjacent to the cutting tool (B), and can be fed by the workpiece feeding device
6
along a work path for cutting.
When it is desired to replace the worn cutting tool (B), the first coupling member
1
a
is first released to turn the upright post
2
so as to move the workpiece feeding device
6
away from the cutting tool (B) so as not to interfere replacement of the cutting tool (B). Then, the repositioning of the upright post
2
is required, which results in inconvenient operation since there is no means for repositioning the upright post
2
. Moreover, since the first operating lever
4
a
and the workpiece feeding device
6
are disposed on the opposite ends of the horizontal post
5
, the adjusting operation of the workpiece feeding device
6
in the horizontal direction is inconvenient to conduct.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a supporting apparatus for a workpiece feeding device which is repositioned easily, and which permits convenient adjustment of the workpiece feeding device.
According to this invention, the repositionable supporting apparatus includes a lower post having a bottom end portion adapted to be fixedly secured relative to a worktable, and an upper end portion opposite to the bottom end portion in an axial direction. An upper post is disposed co-axially rotatable relative to the lower post around an axis parallel to the axial direction, and has an abutment end portion with a downward abutment wall which is disposed proximate to the upper end portion of the lower post, and an anchored end portion opposite to the abutment end portion in the axial direction. The downward abutment wall defines an upper cavity therein which extends upwardly and which is radially distant from the axis. A cantilever member has an anchoring end mounted on the anchored end portion of the upper post, and a holding end opposite to the anchoring end in a direction radial to the axial direction and adapted to carry a workpiece feeding device. A coupling member is disposed on the upper end portion of the lower post to couple the upper end portion with the abutment end portion of the upper post in a retained position where the upper post is prevented from rotation relative to the lower post, and in a released position where the upper post is rotatable relative to the lower post. The coupling member includes an upward abutment wall to slidably contact the downward abutment wall. The upward abutment wall defines a lower cavity therein which extends downwardly and which is aligned and in communication with the upper cavity. A spring-biased tumbler pin is disposed in and is movable relative to the lower cavity between a locked position where the tumbler pin protrudes into the upper cavity, and an unlocked position where the tumbler pin is retracted by depression of a depressing member to be flush with the upward abutment wall so as to permit sliding movement of the downward abutment wall relative to the upward abutment wall around the axis, thereby moving the workpiece feeding device away from a cutting tool on the worktable so as not to interfere with replacement of the cutting tool.
REFERENCES:
patent: 2631618 (1953-03-01), Aruidson
patent: 6142699 (2000-11-01), Pao
patent: 344835 (1960-04-01), None
patent: 597342 (1959-08-01), None
patent: 55-112745 (1980-08-01), None
Christensen O'Connor Johnson & Kindness PLLC
Lin Ching-Chi
Tolan Ed
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