Woodworking – Planer – Adjustable cutter
Reexamination Certificate
2000-12-07
2001-09-04
Bray, W. Donald (Department: 3725)
Woodworking
Planer
Adjustable cutter
C033S642000, C033S791000, C083S522190, C144S117100, C409S210000, C409S218000, C451S009000
Reexamination Certificate
active
06283181
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
16
.
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 frame having a work table, a plurality of spaced apart posts that extend upright from the work table and that respectively have top end portions, a pair of opposite seats mounted securely on the top end portions of the posts, and a hollow supporting rod interconnecting the seats and formed with an elongated slot that extends in a transverse direction relative to 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 measuring scale provided on the supporting rod and aligned with the slot, a slide member mounted in the supporting rod and slidable along the slot, a pointer connected to the slide member and extending to the measuring scale, a roller guide pivoted on one end of the supporting rod, a flexible string passing through the roller guide and having one end secured to the slide member and the other end extending downwardly from the roller guide to be secured to the cutter carriage, and an urging member mounted in the supporting rod and having one end secured to the supporting rod and the other end secured to the slide member for urging the string so as to permit the pointer to be movable along with the cutter carriage.
REFERENCES:
patent: 3067788 (1962-12-01), Eschenburg
patent: 5795113 (1998-08-01), Wikey et al.
patent: 5927357 (1999-07-01), Welsh et al.
patent: 6131628 (2000-10-01), Chiang
Bray W. Donald
Christie Parker & Hale LLP
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