Woodworking – Planer – Adjustable work carrier
Reexamination Certificate
2001-06-20
2002-07-23
Bray, W Donald (Department: 3725)
Woodworking
Planer
Adjustable work carrier
C144S117100
Reexamination Certificate
active
06422274
ABSTRACT:
BACKGROUND OF THE INVENTION
1.Field of the Invention
The present invention relates to a wood planing machine, more particularly to a wood planing machine with a height adjustment mechanism that is adapted to be operated manually, mechanically and externally of a machine body with ease.
2. Description of the Related Art
Referring to
FIGS. 1
to
4
, a wood planing machine
10
according to U.S. Pat. No. 6,135,177 is shown to include a machine body
11
with two opposite side walls
111
, and a cutter unit (not shown) mounted between the side walls
111
. A workpiece support bed
13
is movably disposed in the machine body
11
between the side walls
111
and below the cutter unit (not shown), and is movable relative to the latter. A holding seat
15
is suspended in the machine body
11
below the bed
13
and between the side walls
111
. The holding seat
15
includes a tubular body
151
formed with an upright passage
152
therethrough, and a radial pinion-mounting hole
155
in communication with the passage
152
. A coupling member
14
is secured to a bottom side of the bed
13
, and has a fixed vertical rack
141
that extends between upper and lower ends thereof. The coupling member
14
extends slidably through the passage
152
in the holding seat
15
. A drive shaft
16
has a first coupling end
162
mounted rotatably on the tubular body
151
and extending across the pinion-mounting hole
155
. A turning rod unit
17
is mounted on the machine body
11
, and is coupled to a second coupling end
164
of the drive shaft
16
via a pair of gears
171
,
163
. A pinion
161
is disposed in the pinion-mounting hole
155
of the holding seat
15
, and is fixed on the first coupling end
162
of the drive shaft
16
for meshing with the vertical rack
141
in such a manner that rotation of the rod unit
17
results in vertical movement of the bed
13
toward and away from the cutter unit (not shown)
Manual turning of the rod unit
17
in order to move the support bed
13
in the machine body
11
is tiresome. The situation is aggravated in case the support bed
13
is relatively large and heavy.
SUMMARY OF THE INVENTION
Therefore, the object of this invention is to provide a wood planing machine with a turning rod unit which is operable manually and mechanically and which can overcome the aforementioned drawbacks that are associated with the use of the prior art wood planing machine.
Accordingly, a wood planing machine of the present invention includes a machine body, a workpiece support bed, and a height adjustment mechanism. The workpiece support bed is disposed movably in the machine body. The height adjustment mechanism includes a bed-turning rod unit, a slide element, a transmission device, and first and second bevel gears. The rod unit is mounted on the machine body and is operably associated with the support bed in such a manner that rotation of the rod unit results in movement of the support bed within the machine body. The slide element is disposed slidably on the rod unit, has a pair of spaced apart gear-holding arms. The slide element is slidable along the rod unit between first and second positions. The transmission device is mounted on the machine body, and has a toothed driving wheel exposed therefrom disposed adjacent to the slide element. The first and second bevel gears are mounted respectively on the gear-holding arms of the slide element such that the first and second gears are disposed on opposite sides of the driving wheel. The first and second bevel gears are coupled to the rod unit so as to be co-rotatable therewith. The slide element is movable to the first position, where the first bevel gear meshes with and is driven by the driving wheel to permit the rod unit to rotate in a first direction, and to the second position, where the second bevel gear meshes with and is driven by the driving wheel to permit the rod unit to rotate in a second direction opposite to the first direction.
Since movements of the workpiece support bed relative to the cutter unit can be done manually and mechanically, the aforesaid drawbacks encountered by the use of the prior art wood planing machine can be eliminated.
REFERENCES:
patent: 6135177 (2000-10-01), Chiang
patent: 25351 (2000-01-01), None
Bray W Donald
Christie Parker & Hale LLP
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