Woodworking – Rotary cutter – Having slotted bit seat
Reexamination Certificate
2002-11-07
2003-11-11
Bray, W. Donald (Department: 3725)
Woodworking
Rotary cutter
Having slotted bit seat
C144S117100, C144S218000, C144S134100, C144S241000, C407S038000, C407S037000, C407S041000, C407S049000
Reexamination Certificate
active
06644369
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims priority of Taiwanese Application No. 091211223, filed on Jul. 23, 2002.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cutter unit, more particularly to a cutter unit for a wood planing machine.
2. Description of the Related Art
Referring to
FIGS. 1 and 2
, a conventional cutter unit for a wood planing machine is shown to include a rotating axle
13
, a planing cutter
17
, two positioning bars
14
, and a forming cutter set.
As illustrated, the axle
13
includes an axle body
131
formed with an axially extending retaining groove
132
confined by a groove-confining wall
133
W that has two opposing inclined wall portions
134
,
135
and a bottom wall portion
133
interconnecting the inclined wall portions
134
,
135
. The planing cutter
17
is disposed within the retaining groove
132
in the axle body
131
. The positioning bars
14
are disposed securely in the retaining groove
132
to press the planing cutter
17
against one of the inclined wall portions
134
,
135
of the retaining groove
132
so as to prevent disengagement of the planing cutter
17
from the retaining groove
132
. The positioning bars
14
respectively have opposing end faces
140
that are spaced apart from each other to define a cutter receiving chamber
132
C therebetween. The forming cutter set is disposed in the cutter receiving chamber
132
C, and includes a forming cutter
1
with a cutting edge
11
, a cutter positioning block
15
, and two fastener screws
16
. The cutter positioning block
15
is disposed in the cutter receiving chamber
132
C, and has two opposite end faces
151
respectively abutting against the opposing end faces
140
of the positioning bars
14
, and two opposite inclined side faces
152
,
153
. The forming cutter
1
is disposed in the cutter receiving chamber
132
C between the cutter positioning block
15
and the planing cutter
17
. The fastener screws
16
extend respectively through two threaded holes
156
in the cutter positioning block
15
, and are threadedly engaged within two threaded holes
136
in the bottom wall portion
133
of the groove-confining wall
133
W, respectively, such that tightening of the fastener screws
16
results in an upward movement of the cutter positioning block
15
relative to the retaining groove
132
, which, in turn, results in pressing of the forming cutter
1
against the planing cutter
17
, thereby securing the forming cutter
1
in the cutter receiving chamber
132
C.
Some disadvantages resulting from the use of the aforesaid conventional cutter unit are as follows:
(1) Since the forming cutter
1
is juxtaposed with the planing cutter
17
, the user is exposed to injury during mounting and dismantling of the forming cutter
1
into and from the cutter receiving chamber
132
C.
(2) During tightening operation of the fastener screws
16
, the forming cutter
1
may wobble and move upwardly and downwardly in the cutter receiving chamber
132
C, thereby resulting in an inaccurate positioning of the forming cutter
1
within the cutter receiving chamber
132
C.
SUMMARY OF THE INVENTION
Therefore, the object of this invention is to provide a cutter unit for use in a wood planing machine, the cutter unit having a cutter positioning block by the use of which the aforementioned disadvantages can be avoided.
Accordingly, a cutter unit for a wood planing machine of the present invention includes: a rotating axle formed with an axially extending retaining groove confined by a groove-confining wall that has two opposing wall portions; two positioning bars mounted securely in the retaining groove and respectively having opposing end faces that are spaced apart from each other to define an axially extending cutter-receiving chamber therebetween; and a cutter set mounted detachably in the cutter-receiving chamber. The cutter set includes a cutter with two opposite end faces and two opposite abutting side faces, and a cutter positioning block having two opposite end faces respectively abutting against the opposing end faces of the positioning bars, and two opposite first and second side faces. The first side face of the cutter positioning block is indented to form a cutter-holding recess that receives the cutter therein and that is defined by a recess-confining wall with two opposing wall portions. The opposite end faces of the cutter respectively abut against the wall portions of the recess-confining wall of the cutter positioning block. One of the abutting side faces of the cutter is distal from the cutter positioning block, and is disposed outwardly of the cutter-holding recess. The other one of the abutting side faces of the cutter abuts against the recess-confining wall of the cutter positioning block. The cutter set further includes an adjusting unit that is disposed between and that abuts against the second side face of the cutter positioning block and one of the wall portions of the groove-confining wall of the retaining groove and that is adjustable to move the cutter positioning block and the cutter in a transverse direction relative to the wall portions of the groove-confining wall so as to press the one of the abutting side faces of the cutter against the other one of the wall portions of the groove-confining wall of the retaining groove, thereby securing the cutter in the cutter-receiving chamber.
REFERENCES:
patent: 4429726 (1984-02-01), Betzler
patent: 5163490 (1992-11-01), Meis
patent: 6092571 (2000-07-01), Liao
patent: 6095211 (2000-08-01), Chiang
patent: 6119741 (2000-09-01), Rowe et al.
Bray W. Donald
Trop Pruner & Hu P.C.
LandOfFree
Cutter unit for a wood planing machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cutter unit for a wood planing machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cutter unit for a wood planing machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3170729