Woodworking – Planer – Adjustable cutter
Reexamination Certificate
2000-11-09
2001-09-04
Bray, W. Donald (Department: 3725)
Woodworking
Planer
Adjustable cutter
C033S642000, C033S791000, C083S522190, C144S117100, C144S373000, C402S021000
Reexamination Certificate
active
06283180
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a wood planing machine, more particularly to a wood planing machine having a cutter carriage with a height indicator above the cutter carriage for indicating working height of the cutter carriage.
2. Description of the Related art
FIG. 1
illustrates a conventional wood planing machine
10
. The wood planing machine
10
includes a base
11
with upstanding posts
12
disposed at the corners of the base
11
for supporting a cutter carriage
13
thereon. A motor
14
is mounted on the cutter carriage
13
for driving a rotary cutter (not shown). The wood planing machine
10
is provided with a height adjusting unit (not shown) for adjusting height of the cutter carriage
13
via a handle-wheel
15
which is mounted on a top end of one of the posts
12
. A scale
16
is attached to the aforesaid one of the posts
12
below the handle-wheel
15
for measuring the height of the cutter carriage
13
.
The wood planing machine
10
is disadvantageous in that it is relatively inconvenient for an operator to view the scale
16
while operating the handle-wheel
15
to adjust the height of the cutter carriage
13
, and that there is an undesirable need for an operator to bend his or her body in order to view to the scale
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a wood planing machine that is capable of overcoming the disadvantages described above.
Accordingly, a wood planing machine of this invention comprises: a base having a work table, a plurality of spaced apart posts that extend upright from the work table and that respectively have top end portions, and a seat mounted securely on the top end portion of at least one of the posts; a cutter carriage mounted on the posts above the work table and below the top ends of the posts, and movable along lengths of the posts; a rotary cutter mounted on the cutter carriage; a height adjusting unit for adjusting height of the cutter carriage relative to the work table; and a height indicator including a lever having one end mounted on the seat and the other end projecting upwardly from the seat, a roller guide unit including a roller guide pivoted on the other end of the lever, and a flexible string passing through the roller guide, and having two opposite ends extending downwardly from the roller guide, one of the opposite ends of the string being secured to the cutter carriage, the height indicator further including an urging member that has one end connected to the work table, and the other end connected to the other one of the opposite ends of the string for urging the string, the string being tensioned by the urging member, being movable along with the cutter carriage, and having a reference segment that extends between the opposite ends of the lever and that is exposed from the lever so that moving distance of the reference segment can be measured with reference to the lever.
REFERENCES:
patent: 3067788 (1962-12-01), Eschenburg
patent: 3718168 (1973-02-01), Berends
patent: 5795113 (1998-08-01), Wixey et al.
patent: 5927357 (1999-07-01), Welsh et al.
patent: 5957174 (1999-09-01), Shadeck
patent: 6131628 (2000-10-01), Chaing
Bray W. Donald
Christie Parker & Hale LLP
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