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Патент USA US2121043

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Patented June 21, 1938
UNITED sTATEs PATENT OFFICE
CUTTER. CHAIN
Warren Noble, >Michigan City, Ind., assignor to
Sullivan Machine Company, a corporation of
Massachusetts
Application November 27, 1934, Serial No. 755,012
18 Claims.
This invention relates to cutter chains and
more particularly to improvements in a cutter bit
and bit holding means of a mining machine cut
ter chain.
'
An object of this invention is to provide an
improved mining machine cutter chain. Another
object is to provide an improved adjustable posi
tioning and holding means for a cutter bit. A fur
y ther object is to provide an improved bit holding
10` means for adjusting a cutter bit into different
angularly related positions with respect to a bit
block whereby but a single form of bit block may
be employed to attain all positions of the cutter
bit. Yet another object is toy provide a cutter bit
15J» of an improved design to obtain improved cut
ting means, and due to its particular shape,
greatly improving the distribution of heat at the
cutting points. A still further object is to pro
vide an improved bit holding means for position
20 lng a cutter bit in different angularly related po'
sitions and end-for-end relations with respect to
a bit block. These and other objects and ad
vantages of the invention will, however, herein
after more fully appear.
In the accompanying drawing there is shown
25
for purposes of illustration one form which the
invention may assume in practice.
f
In this drawing,
Fig. 1 is an end elevational view of a bit block
30` with which the illustrative embodiment of the'
invention is associated.
Fig. 2 is a side elevational view of the bit block
shown in Fig. 1, showing the improved cutter bit
in position thereon.
Fig. 3 is a view in longitudinal section taken
substantially on line 3-3 of Fig. 2.
Fig. 4 is a cross sectional view taken on line
4-4 of Fig. 2.
Fig. 5 is an elevational view of the improved
4()` bit holder.
Fig. 6 is a perspective view of the improved
`
cutter bit.
y
In this illustrative embodiment of the inven
tion there is sho-wn a bit block I,` a series of
45` which are adapted to be pivotally connected to
gether by suitable strap links or otherwise to form
an endless cutter chain in a well known manner.
The bit block I has a lateral boss or lug 2 pro
vided with a longitudinal bore 3, the inner pe
¿50;V riphery of which is serrated at 4. Receivable in
the longitudinal bore 3 is the shankV 5 of a bit
holder 6, the latter herein composed of two mating
parts 'I and 8 of semi-circular cross section and:
cooperating to form the cylindrical shank 5 for
¿55l reception Within the lug bore. The exterior pe,
(o1. 26a-33) -
I
„t
ri'phery of the shank 5 is toothed at 9 forengage
ment with the serrations in the lug bore to hold
the holder against angular displacement in the
bore. In this instance, each part of the bit hold
er 6 is recessed at I0, and these recesses in the 5N
bit holder parts cooperate to form a socket I I for
receiving a cutter bit I2 of improved design.v
The cutter bit I2 is herein of the so-called de
tachable type, preferably stamped out of sheet
metal into the desired shape and suitably tem fr
pered to attain the desired hardness. The body
I3 of this cutter bit is preferably generally V
shape in cross section, and the ends of the body
are slabbed OIT at I4 to form relatively inclined
faces lying in the plane sides `of an obtuse di
itf
hedral angle, these slabbed oiî ends providing a
pair of cutting points I5, I5 at each end of the bit
on the same side of the bit, the cutting points
being formed on the` iianged legs of the V. The
bit, due to its particular shape, tends to reduce do“
concentration of heat at the cutting points of
the bit, this being a result, in the main, of the
relatively thin cross section of the bit body.
The socket Il in the bit holder is also prefer
ably of’generally V-shape for receiving‘the V
shaped bit body, and the holder parts 'I and 8 i
have portions I6, I6 projecting within the V
shaped recess in the bit and shaped to conform
with the inner contour of the bit. The semi-cir
cular rear end portions of the bit holder parts
cooperate to form a bolt-like portion I1, to which
is threadedly connected a tightening nut I8ven
gaging the rear face of the bit block lug. This
nut, when tightened, pulls the holder axially
rearwardly with respect to the bit block `lug to
clamp the bit against the forward face of the bit
block lug. This bolt-like portion I1 is annularly
gro-oved at I9 for receiving a snap ring 20 to
provide an abutment for the nut I8 to prevent
inadvertent release of the nut from the bolt. By
releasing the snap ring and the nut I8 from.
the bolt portion I1 of the holder, the latter may
be withdrawn` forwardly in an axial direction
from the lug bore, and the two parts 'I, 8 thereof
separated to release the cutter bit from its sock
et.. When one cutting end of the cutter bit be
comes dull the bit may be turned end-for-end
withìn‘the holder socket or the bit holder may
be turned 180° within the bit block lug bore to
present sharpl cutting points> to the work. When
the bit becomes dull it may, due to the inexpen
sive design, be discarded and replaced by a newv
bit. By changing the connection of the teeth
on thev holder shank with the serrations in the
lug b_ore the annular position of the bit with re
55.5
2
2,121,043
’ spect to the bit block may be changed as desired.
The same is made reversible simply by changing
the end-for-end position of the bit holder with
respect to the bit block lug, the bit block being of
a symmetrical design to receive the latter at
either end thereof.
Other manners of use and
7 . A cutter bit having its body formed with side
spaced portions provided with parallel front edges
While there is in this application specifically
described one form which the invention may as
sume in practice, it will be understood that thisA
form of the same is shown for purposes of il
lustration and that the invention may be modi
15 fied and embodied in various other forms with
out departing from its spirit or the scope of the
appended claims.
What I claim as new and desire to secure by
Letters Patent is:
1. In a cutter chain, a chain block, a revers
ible cutter bit having its body formed with a pair
of distinct spaced cutting points at each end
thereof, all of said cutting points projecting from
25
the bit body in the same direction, and bit hold
ing means for holding said cutter bit in position
on said chain block with a pair of said cutting
points projecting in cutting position from said
chain block, said cutter bit being reversible end
each terminating in a cutting portion individual
thereto at each end of the bit, two cutting por
tions at each end of the body, and each cutting 10
portion having a rearwardly and inwardly in
clined rear surface.
8. Acutter bit having a body of generally V
shape cross section having at each end a pair of
spaced cutting points and each cutting point hav 15
ing a` rearwardly inclined receding surface.
9. A cutter bit having a body formed with
four distinct spaced cutting points, a pair at each
bit end, and each pair of cutting points project
ing in the same direction from the bit body and 20
each cutting point having a rearwardly inclined
receding surface.
. 10. A bit holder formed of mating parts, each
having a recess, the recesses cooperating to
form a socket of generally V-shape for receiving
a cutter bit of' generally V-shape cross section.
position with respect to said chain block.
1l. A stamped metal bit bent into shape with
its sides in angularly disposed relation and hav
ing cutting points at the ends of its angularly
disposed sides and each cutting point having a
rearwardly inclined receding surface.
2. In` a cutter chain, a chain block, a reversible
Cutter bit having at each end thereof a pair of
centrally located lateral lug, the lug having a
for end with respect to said holding means to
30 dispose said other pair of cutting points in cutting
distinct spaced cutting points, all of said cutting
35 points formed on the same side of said bit, and bit
" holding means for holding said bit in position on
said chain block with a pair of said cutting points
projecting in cutting position from said chain
block, said bit being reversible end for end with
respect to said holding means to dispose the
other pair of cutting points in cutting position
with respect to said chain. block.
3. In a cutter chain, a chain block, a reversible
receivable in said lug bore, a forwardly project 35
ing portion having a bit receiving socket, a cutter
bit receivable in said socket and having a pair of
spaced cutting points, and means engageable with
the holder shank for clamping said bit against the
forward face of said lug with said spaced cutting 40
points projecting in cutting position from said
block lug.
13. In a cutter chain, a bit block having a cen
cross section having at each end thereof a pair
tudinal bore, a bit holder having a shank receiv
able in said lug bore, a forwardly projecting por
tion having a bit receiving socket, a cutter bit
receivable in said socket, and means engageable
with the holder shankV for clamping said bit
against one end face of said lug, said holder be
ing reversible end for end with respect to said
lug for clamping said cutter bit adjacent the
opposite end face of said lug to reverse the posi
leg of the V, and bit holding means for holding
cutting position from said block, said cutter bit
" being reversible'end for end'with respect to said
holding means to dispose the other pair of
cutting points in cutting position with respect to
said chain block.
4. In a cutter chain, a chain block, a reversible
' cutter bit of generally V-shape cross section hav
ing a pair of cutting points formed at each end
thereof at the same side of the bit body, and bit
holding means for holding said cutter bit in
60 position on said chain. block with a pair of cutting
' points projecting in cutting position from said
block, said cutter bit being reversible end for end
with respect to said holding means to dispose the
other pair of cutting points in cutting position
with respect to said chain block.
5. A cutter bit having a body provided with
spaced side portions having parallelfront edges,
the opposite ends of each edge having cutting
portions formed thereon, two distinct spaced cut
70 ting portions at each end of the bodyand each
cutting portion having a rearwardly and in
wardly inclined rear surface.
`
r
tion of the bit on the bit block.
_
14. A cutter bit having at each end thereof a
pair of spaced cutting points at the extremities
of similar tapering projections, the body of said
bit between said projections cut back so that each
cutting point is formed at the junction of a
straight surface connecting points at opposite
ends of the bit and an oblique surface left by the
cutting away speciñed.
15. A cutter bit having four cutting points dis
posed at the corners of a rectangle and having
a> body two of whose sides follow sidesof such
rectangle and deeply notched between the pairs
of points respectively at the opposite ends of said
sides.
16. A cutter bit having a body formed at each
end with a pair of spaced projections, the inner g
edges of which extend along lines converging at ‘
6. A cutter bit' having a body provided with thelong'itudinalfcenter of the bit, and parallel
spaced portions having parallel front edges, the. lateral edges, the inner converging edges of the
75 opposite ends of each edge having cutting por
30
longitudinal bore, a bit holder having a shank
trally located lateral lug, the lug having a longi
said cutter bit in position on said chain block
with a pair of said cutting points projecting in
25.
12. In a cutter chain, a bit block having a
cutter bit having a body of generally V-shape
' of cutting points, the points formed on each
55
portions at each end of the body at the same
side of the body and each cutting portion hav
ing a rearwardly and inwardly inclined rear sur
face.
5
advantages of the improved cutter chain struc
ture will be clearly apparent to those skilled in
the art.
20
tions formed thereon, two distinct spaced cutting
projections and said parallel edges terminating
2,121,043
in cutting points at the extremities of said spaced
projections.
\
17. A cutter bit having a body formed at each
end with a pair of spaced projections, the inner
Cil
edges of which extend along lines converging at
`the longitudinal center of the bit, and parallel
lateral edges, the inner converging edges of the
projections and said parallel edges terminating
in cutting points at the extremities of said spaced
3
projections, the rearward surfaces of said projec
tions inclined inwardly and rearwardly.
18. A double-ended cutter bit having a body
in the shape of a trapezoid viewed in side eleva
tion and having parallel sides and relatively in
clined ends, said body formed with a pair of dis
tinct spaced cutting points at each end thereof.
WARREN NOBLE.
`
CERTIFICATE 0E CQEEECTIOEa
Patent No. 2,121,0Lt5.
¿
June 21, 1958.
ì
wAEREN NOBLE.
It is hereby certified that the Vname of the assignee in the above num
bered patent was erroneously described and specifiedas "Sullivan Machine
Company" whereasl said name should have been 'described and specifi ed as
`
Sullivan Machinery Company, a corporation of Massachusetts, as shown by
`
the record of assignments in this office; and that the saidl Letters Patent
‘
the
should
record
be read
of_ the
withcase
thisin correction
the Patent therein
Office.that the Asame may conform
I
to
Signed and sealed this 2nd day of' August, A. D. 1958.
(Seal)
Acting Leslie
Commissioner
Frazer,of Patents.
i
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