Abrading – Attachment – To work guide
Reexamination Certificate
2001-06-25
2003-07-01
Morgan, Eileen P. (Department: 3723)
Abrading
Attachment
To work guide
C451S349000, C451S420000, C451S457000, C451S460000, C451S403000, C451S405000
Reexamination Certificate
active
06585578
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a grinding wheel machine, and more particularly to a grinding wheel machine bracket which is adjustable in angle.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a grinding wheel machine
100
of the prior art comprises a motor
110
, a grinding wheel
120
mounted on the output shaft of the motor
110
and driven by the motor
110
to turn. A grinding wheel shield
130
serves to shield the grinding wheel
120
. An eye protecting plate
140
is fastened with the grinding wheel shield
130
for protecting the eyes of a machine operator from the flying debris in the course of the grinding operation. A bracket
150
is provided at one end with a fastening portion
151
and a long through hole
152
for receiving two bolts
190
which are used to fix the bracket
150
on the grinding wheel shield
130
. The fastening portion
151
is provided at the outer end with a support planar surface
153
corresponding to the peripheral edge of the grinding wheel
120
. The support planar surface
153
has a long placing slot
154
for placing a workpiece (not shown in the drawing) such that the workpiece is secured in place at a grinding angle.
The planar support surface
153
of the bracket
150
and the grinding wheel
120
form therebetween a fixed angle, which allows the grinding wheel
120
to work on the workpiece at a specific grinding angle. In the general grinding operation, the grinding angle is set by the machine operator who must hold the workpiece. As a result, the workpiece is not supported by the bracket
150
, thereby resulting in failure of the grinding operation.
The bracket
150
of the prior art may be fixed by only one bolt
190
which is put through the through hole
152
of the fastening portion
151
. The bracket
150
is angularly adjusted by unfastening the bolt
190
. The prior art structure is defective in design in that the bracket
150
is apt to sway due to the bolt
190
being separated from the planar surface
153
by a greater distance, thereby resulting in a greater moment of force exerting on the bolt
190
. In addition, the machine operator is not sure of the degree of the angle that has been adjusted.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a grinding wheel machine with a means to adjust the angle between the bracket support surface and the grinding surface of the grinding wheel.
The present invention comprises a fixation seat which is fixed at a predetermined position of a grinding wheel machine. A bracket seat has a load surface. A connection member is used to pivot the bracket seat with the fixation seat, thereby enabling the angle between the bracket seat and the fixation seat to be adjusted. The bracket seat is thus fixed at a predetermined angle by adjusting the angle between the load surface of the bracket seat and the grinding wheel of the grinding wheel machine.
REFERENCES:
patent: 2069395 (1937-02-01), Tautz
patent: 3461618 (1969-08-01), Lill et al.
patent: 3566550 (1971-03-01), Piccinino
patent: 3698140 (1972-10-01), Steadman
patent: 4744178 (1988-05-01), Afshar
patent: 5515754 (1996-05-01), Elkins
patent: 5676592 (1997-10-01), Borgatti
Browdy and Neimark , P.L.L.C.
Morgan Eileen P.
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