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Патент USA US2406744

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sept.` 3,1945.
B. L. CRYAR
~ 2,406,744
vROTARY cAsT CUTTER
Filed March. 25, 1945
i“
3 Sheets-Sheet 1
'2
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un. _,
'
'
INVENTOR.
BUFORD L. CRYAR
ATTE RN EYS
@if
sep_t.„3,v1946,
'
.
B. L. CRYAR- .,
2,406,744
,ROTARY CAST CUTTER
Filed March 23, 1945
3 Sheets-Sheet?
v
INVENTOR.
BU FORD L. c RYAR
_ myäwf@
ATTCI RN EYB
Sept. 3, 1946.
B. 1_. cRYAR
2,406,744
ROTARY CAST CUTTER
Filed Màrch '23, 1945
3 Sheets-Sheetl 5
- INVENTQR.
BUFORD L. CRYAR
Patented Sept. 3, 1946
2,406,744
UNITED STATES PATENT OFFICE
2,406,744
ROTARY CAST CUTTER
Buford L. oryar, Albertville, Ala.
Application March 23, 1945, Serial No. 584,310
3 Claims.
1
Y My present'invention, in its broad aspect, has
reference to improvements in rotary cuttingim
plements for cutting casts from persons who
have been injured and a part of the body placed
in a cast.
I have found that'there are four
primary objects to be attained, if a cast cutter
is to be satisfactory, (1), the cutter and process
of removal of the cast must cause a minimum
of discomfort to the patient since the injured
(Cl. 30-167)
2
protects and houses more than half of the cut
ting wheel and is attached as at I6 to the flange
I'I on the handle end 6.
Mounted within the housing I 5 is a brush I3
contacting the rotary cutter, there being a screw
with a head I9 for attaching the same. Formed
at the back of the housing I5 is a threaded sleeve
20 with which is engaged the threaded collar 2l
of a hollow end handle 22 forming a conduit for
part is sensitive, (2), the chips and dust from 10 dust, dirt and the like'and having a connection
the cast must be removed, (3), the implement
23` to a bag or the like (not shown) for receiving
must be light in weight and easily handled since
the chips, dust, dirt and the like. The back of
otherwise, the process of cutting the cast will
the housing I5 is extended to each side of the
be clumsy and laborious and will be unduly ytir- ,
sleeve 2o and below the end handle 22 to which
ing upon both the operator and patient, and 15 is attached as at 24 the upstanding bifurcated .
(4), the construction must be simple, sturdy,
practical and efûcient with no small or intricate
shank 25 of a support 2-6 which has a curved
face 21 directed about the back of the cutting
parts likely to get out of order or become broken
wheel and spaced therefrom and a flat bottom
or deranged. My present improvement accom
28 to which is attached as at 29 a forwardly pro
plishes all of thev above objects and purposes in 20 jecting foot 30 having upper and lower inclined
addition to others which will be apparent from
faces 3l and designed to follow in the cut formed
the following description and drawings, and it
is pointed out that changes in form, size, shape,
in the cast (not sho-wn) by the cutting wheel and
to assist the cutting operation to the end that
materials, and construction and arrangement of v K the cast will be comfortably, promptly and effec
parts may be made and are within the purview
of my broad inventive concept, and the scope of
the appended claims.
,
Y
Q
In the drawings wherein I have illustrated a
preferred form of my invention:
'
Figure 1 is a vertical section through theA
cutter;
,
tively removed.
From the foregoing, it is believed that the
operation and advantages of my invention will
be apparent, but it is again emphasized that in
terpretation of the scope of my invention should
only be conclusive when made in the light of the
subjoined claims.
Figure 2 is a side elevation of the rotary cutter;
Figure 3 is a top plan view; and
Figure 4 is a fragmentary view of the face of
‘
`
I claim:
1. A rotary cast-cutter, comprising a rotary
cutting blade, a housing for the blade, a shaft
on which the blade is ñXed, a side handle form
The numeral I designates a, flexible shaft from
ing a bearing for the shaft, anti-friction bearings
a source of power (not shown) and which may
for the shaft, one carried by the handle and the
be a small electric motor or the like. A side
other supported by the housing, a ñeXible drive
handle member 2 is bored to form a bearing for
shaft coupled with said shaft, a hollow end han
the cutter drive shaft 3 which is coupled as at 4 to dle forming a conduit for dirt and chips and
with the flexible shaft. A button switch 5I on
having' an outlet connection, and a foot project
the handle permits handy control of the motor
beneath the cutting blade and supported
(not shown). The handle has an enlarged end i ing
from the housing.
6 which is annularly recessed as at 1 to receive
2. The invention as defined in claim 1 wherein
the anti-frictional bearings 8 for the shaft which
the housing is less than a full circle in elevation
extends out from the end of the handle and has
' to expose a part of the blade, and a brush mount
keyed thereto as at 9 a milled or grooved cut
ed in the housing and engaging the cutting blade.
ting wheel IIJ, on each side of which is a bear
3. The invention as defined in claim 1 wherein
ing collar II, held in place by set screws I2.
a support is mounted on the back of the housing
The end of the shaft beyond the outer bearing
and has a curved face following the curvature
collar is journalled in another anti-friction
of the cutting wheel, and a bifurcated shank at
bearing I3 supported in the >cap I4 attached as at
tached to the housing, and an elongated beveled
I5 to a semi-circular cutting wheel housing I5
foot attached to the support and projecting for
having spaced parallel -side walls connected by
ward under and spaced from the cutting wheel.
a web and which forms a guard hood over, and 55.
'
BUFORD L. CRYAR.
the
cutter.
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