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Sept# 110» A19467
vct. E. KRAUS '
' Filed sept. 11, 1944.
' '
@bar/_e6 óïQfrc-ZÍÍJ
Patented Sept. 1o, 1946
construction îfdrf?variousïkinds: of tcultters'iy Each
blade comprise'saatbl'ockiof 'metal havingïga ‘ñat‘ï
rThis Iinvention :relates Vatotmetal.. removing., tools»
or ` cutters having»-individuallíf> lfreplaceableebladesn
bottdnri'surface‘el Brand :a ',»to'pz«surface` I1 which.:
Aegeneral `object iis-1to- provide; afcutter which. t
combines most 'ofîthe'advantagesfoffcutters of the".v
inserted'bladeandesofcalledisolid types;v f
converges#towardïthé'rbottomsurfacerin the ‘direc- »
' tion ot the'îtail ends-I8 of ‘the blade; This Yend is
ñat";andí`of aifswidth'isubstantiallyr equall to the
Another object` is :to provide .faitool :havingzone:~
or` more - detachable.- bla'des
thicknessiiof 'th’efîbody ,I 0. .e It 'extends transverselyA
of-«l- the" bottom surface:v lû'intersectin'g v‘the'flatter 1
atN an.l acuterffincluded angle tando the rtop- surface -
constructed> and:
mounted` ‘ in L suchV » .af way. ¿î that ~ various:~- cuttingï..
angles may -be »obtained Without altering _they con.
structiontof theztoolbody'..A
Way that-ïvariousrcuttingganglesfmayçbe 'ßbtained' Y
The 'other‘z'end'a of'ithe‘ bladez-'is 4wider*tradiallvand defines afcuttingïfa'ce I9 terminating in `end `:
and "side'icuttiii'gäi‘edges'z23 and .20 land :inclined-'lz
without ~alter-ing theefconstruction of -‘ the i'to‘ol:
atv . thef-frakeffandì shear fangles " *desiredrv to .be “im‘e "
A further objectfis to «provide-_a novel:detach`t-î.-v
'l able. blade constructed: . andrfmounted' -`in. -such ta'n
l5 parted-*Arto :the rcuttin'grîedges." To spacethe side"
cuttings;edgesî2Il‘v laterally „from“ 'the .sides of the’ '
A further -object I-iseto provide :a-f‘novel :detach-'
able i `bladeV construction and: mounting: therefor."
is'f enlargedÍ
L or "^ made .fî‘portión'î`
thicker ^ ' 2l
`v`of- the
Y whicheavoidsfoverhangiof )the .blades Withrespect '
to. the e supporting ¿bodygy which avoids the fuse fof
Wedges; serrated'= surfaces,^. body Slots, etc., y.and " .20
which enables:smallJ size. rotaryfîcuttersîto `-be`~V
block, astshown rin7 Figs. '4iand >5,’or, ‘it maybe onv
both'sid‘esf (Fig.,'2) Y,- and the amount .of enlarge;
ment’mayfA vary with’jthenharactenoflrthe cutter f
tof‘be n-pro'ducedt L Als'oçrfbyî alternating -the vblades
produced Y. Without «; the -lossçß` of ' îtooth- vor” bodyL 'n
The "'inVentio'rr-.also --aresidesz in thel novel b»con-ï. -
struction». 0f fthe-,tool :bladesf-'to facilitate 4`manu-".25
facture"y and* their. inse-fin fvariousfkirids f of. cutters; .
and- = to insure.' rigidity iofe'mountifng; ofn'the ablade '- onthe tool'bodyz,"
and advantagesëofí
from theïfollowingtdetaíiled
dt'he,finventi'on` 30 course, shaped to provide proper clearance'iffor<4
the uï-peripheral ccuttingjîedge-i 23’. ' Similarly," the
description itaken in: connection `with: the eac‘comë»
Figure 1 isîr'an end viewiotafcutterienibodyingf.
the present invention. I»
Fig. 2'is a side view: <
Fig; 3 .is/1a. fragmentaryfësectionalîd/iew ätakenîif.
IUT/with îth‘oetail Yend ' I 8 ' against an abutment' 24r
l longitudinallygof oneoffthe ‘blades-go
Figs.. 4 . and ,-:5 zare‘i’fplarrifvieWs-îofï diiferentzliform'sá'ë
of- standardizedbladeszi,
` In‘accord-ance with; the. present invention",r each e
bI‘adei-*I Itis! seated"> on' the "periphery :of 'the' body' '
madeîinte'gralfwith‘tlre.body yI 0”so asfto be capa’
ble'foñi'sustainin'g‘ïthe Y.forces ¿thatßareexerted ‘on
the’fbla'deí- ‘ini theoplane'of-` rotation of "the blade;
To this end;.'annularly’spaced« porti'ons'of‘thefbody" '
removixrgxprocesses; itïrhas been:shownf:forflpuiff'v ' are" cut “awayraszëby'fface 'milling ,to "fornfr the `-flatchordalfsurfaces' 1 I 2 ~ intersecting rv'ati/one 4vend' Withï
posesiof illustration'ffembodiedï;inïalrotaryîmi
types of cutters rfo‘r.: carrying :out î-“different--lmetalli`
cutter comprising a body/:zin .fthe xforrnf'zofcaogones».
theebodyeperiphery 26 and ."at'rthe other"en<;1"with`
the*` abutment Zllf‘îwhichD makes< 'with the'surface"- '
I 2"precis’e'1y”the`:same fang'le zth'at the“ taill end ‘.I 8 ‘
of the blade formsïwith'rthe*».bottomsurÍacer'IS. e
The abutlnerit‘îsï'of the Saline radial» heightasfthè
blade-‘end:Y H31»->
through holes 28 irïïthe‘blad‘e‘andthreading linto
steel‘and'formed at--oneien‘dfWithflrecesses'A/Idïïförïï'55-tapped holes 29 in the disk-10.1' The holes A'29',
receiving tipsY I 5ï’òf carbidefor'other‘cutting‘inate# -
Whichf‘extënd perpehdicìilaritó the blade and body
rial seated in and bonded-¿to? the'de'ñriing¿Walls-'off
Surfaces> *ln 6fan‘d‘î`l
y y
the recess. .
order >toto’l‘obtain
v’I 8 A‘anti lthe
the fbl'ade"
f 24 "ini> i
accurately withïï»
Exceptifor thé‘widtiî’iand inclination of their
cutting faces, the blades II may beof the'same 60 and the abutment when the'blade is fastened
to the body. To insure that such full contact
will be obtained, the blade holes 28 are preferably
counterbored at their upper ends as indicated at
seat, a blade having a flat bottom resting on said
seat and a tail end contacting said abutment, the
top of said blade converging toward said bottom
S3 to provide conical seats 3ßîwhich cooperate
surface in thedirection ofîsaid„abutment, said
with mating surfaces 3| at the lower ends of the CH body extending from said l*seat beyond the other
cylindrical screw heads 32 to cam the blades
against the abutment as the screws are tightened..
The holes 23 and the counterbores are made
end of said blade and shaped to fully expose the
Alatter end, a cutting face formed on said other
blade end and terminating in a cutting edge
slightly larger than the screws to permit of this
. projecting laterally from said body, headed screws
action which compensates for any slight inaccu
spaced longitudinally of said blade and project
ing through the blade and into said body to clamp
the blade. against saidseat, the heads of said
screwsy having conical bottoms, and conical seats
racy in the location of the screw holes relative to
the abutments. Preferably, the counterbores are
deep enough to enable the screw heads 32 to be
concealed within the blade and to locate the seats
3G close to the bottom of the blade.
With Vthe blade thusv seated and fastened to
the body, the mounting is extremely rugged and
well adapted to sustain the forces encountered in
service use of the cutter in various types and with
the cutting faces i9 of the blades positioned at /
Widely varying rake and shear angles. The tan
gentially directed thrusts Von the blade are sus
tained mainly by the abutment 24 and are di
rected along a line generally parallel to the bot
tom surface I â of the blade. Tipping of the blade
by this force isprevented by the screws 21 which
for said heads formed in said blade.
2. A tool comprising a body having a flat blade
seat thereon extending to the surface of said lbody
and a rigid abutment upstandingrfrom said seat
at one end thereof and disposed at an acute angle
With respect to the seat, a blade having a ñat
bottom resting on said seat and projecting beyond
said surface and a tail end contacting said abut
ment, the top of said blade converging toward
said bottom surface in the direction of said abut
ment, said body projecting beyond said seat 'and
the other end of the blade so 4as to expose the
latter, a cutting faceV formed on said other blade
also serve to sustain the side thrusts on the blade.
end and terminating in a cutting edge, and head
This is for the reason that with the screw ar-.
ed screws spaced longitudinally of said blade and
rangement described, the conical bottoms of the
projecting through the blade and into said body
screwk heads are in full contact with the conical " to clamp the blade against said seat.
seats 3B around their entire peripheries so that
Y 3. A tool comprising a body having a fiat blade
the blade is held positively against sidewise shift- ' seat thereon and a rigid abutment upstanding
ing.` The ability of the blades to withstand such
from said seat at one end thereof, a >blade having
side forces is increased by locating the seats 3i)
a flat bottom resting on said seat and a tail end
close to the bottom surface l5 thereby minimizing
contacting said abutment, the portion of said
any possible deñection of the screw under the
body beyond theother end of said blade being
thrusts on the blade. As a result, the cutter as
shaped to expose the latter, a cutting face formed
a whole possesses substantially all of the advan~
on said other blade end and terminating in a
tages inherent in so-called solid or integral tooth
cutting edge, headed screws spaced longitudinally
cutters while at the same time the individual 40 of said blade and projecting through the blade
blades are readily replaceable. As a‘consequence,
and into said body to clamp the blade against
the provision of body slots, fastening Wedges, etc.V
said seat, the heads of saidscrews having coni
as used in insertedblade cutters is avoided, and
cal bottoms, and conical seats for said heads
replaceability ís achieved without sacrificing body
formed in said blade.
4. A tool comprising abody having a succes
Such ready replaceability of the blades. con
sion of flat blade seats thereon and a rigid Vabut
tributes materially to the versatility of the cutter.
ment upstanding from each seat vone one end
The 4cutting faces I9 are, it will be observed, on
thereof, blades each having a flat bottom resting
the ends of the blades Il, and, as a consequence,
the angles of these faces are not dependent upon
on one of said seats and a tail end contacting said
abutment, said >body being adapted to fully ex
thelocation of slotsor other structural parts of
the body as in the case of ordinary inserted blade
cutters. To change the cutting angles, it is only
pose the other end of each blade, a cutting face>
formed on said other end of each blade and ter
minating in a cutting edge, a top on each blade
necessary to substitute blades whose endfaces are
converging toward the bottom surface in the di
disposed at the angles desired, such angles being 55 rection ofsaid abutment whereby to provide a
obtained by finishing of the blade before mount«
chiprecess in advance of the cutting face of the
ing in the cutter. Because the blades are not Y next adjacent blade, nand screws projecting
supported in open slots in the cutter body, the
through said blades and into said body to clamp
strength of the latter is not in any way affected
the blades against said seats.
by changing of the blades or the omission of 60
5. A cutter blade comprising >a block of ma-V
certainblades in cases where itis desired to Vary’
terial having opposite viiat ends, a flatv bottom
the number of teeth on the cutter.
surface and a top surface converging toward said
It will‘be apparent that the blades Il are of
bottom` surface in theV direction of one of said
simple and inexpensive construction. As a result,
ends, the latter constituting an abutment surface
repair of a ‘damaged cutter is effected inexpen
disposed at an acute included angle to said bot
sively simply by the substitution of a new blade,
tom surface, an enlargement at the other end
and this Without the necessity of heating or other
of said block providing a cutting face projecting
wise _distorting the cutter as is necessary in the
laterally from at least one side of the block, and
case ofthe repair of solid cutters.
I claimY as my invention:
means defining spaced Aholes extending through
70 said 'block at right ,angles to said bottom surface
1. A tool comprising a body having a flat blade
and counterbored at their upper ends to provide
seat thereon and a rigid abutment upstanding
conical seats Within said block.
from said seat at one end thereof and disposed
atan acute includedangle with respect to the Y
A Crm1/¿LES E. KRAUs.
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