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Патент USA US3058208

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Oct. 16, 1962
T. v. WILLIAMS
ADJUSTABLE BIT CLAMPING MEANS
Filed Oct. lO, 1958
7u.a.
3,058,198
United States Patent O "ice
3,58,l98
Patented Oct. 15, 1962
l
2
3,058,198
To assemble the parts they are inserted in the recess
with all of the screwsV retracted and with the serrations 3
ADJUSTABLE Bi'i‘ @LAMPEN G MEANS
Thurston V. Williams, Wiìton, NH., assigner to The O.K.
Tool Company, inc., Milford, NH., a corporation of
New Hampshire
Filed (Bet. 1G, 1958, Ser. No. ‘766,612
10 Claims. (Cl. 29-96)
and 4 meshing with the serrations of the clamp parts so
that the bit projects beyond the end and peripheral faces
of the holder slightly less than the desired distance. Then
the screws 12 and 14 are advanced until the ybit 7 lis caused
to project through the end and peripheral outlets of the
recess the ydesired distances, after which the screws 1l are
This invention relates to means for holding bits in cut
tightened to clamp the bit in position.
ting tools such as milling cutters for example, its objects 10
The modification shown in FIGS. 5 and 6 is like that
being to provide bit-holding means which are simple and
shown in FIGS. 1 to 4vr except that the screw. 13.', corre
economical in construction, in which the bit may be ad
sponding to the screw 13, is threaded into the holder 1’
justed quickly and accurately in each of two dimensions,
instead of the part 6’ of the clamp. As in the first em-.
in which the bit may be clamped in position easily and
lbodiment the -bit 7' engages seats 8’ and 9' on the parts 5’
firmly, which requires no difficult machine work, and
and 6’ and the part 6’ is adjusted lengthwise of the serr-a
which is durable and reliable in use.
In one aspect this invention involves a holder having a
recess means for mount-ing a bit in the recess comprising
v
w
tionsk 4.’ by means of a screw 1,4'.
It should be understood that the present disclosure is
for the purpose of illustration only and that this inven
a clamp having two parts for clamping the bit therebe
tion includes> all modifications and equivalents which fall
tween, an actuator -for the clamp, and an adjustor for 20 within the scope of the appended claims.
varying the extent to which the bit projects from the
I claim:
recess, the actuator and adjustor being carried by the
1. Adjustable bit-clamping means comprising a holder
same part of the clamp and the aforesaid recess being
having a recess with an outlet through each of two ad
rectangular in cross-section so that it may be machined
jacent faces of the holder, in the recess a clamp including
easily.
25 two parts for gripping therebetween a bit which projects
In -another aspect the tool comprises a holder having
from the recess beyond both of said faces, one of said
a recess with an outlet through each of two adjacent -faces
parts having a bit seat facing toward one of said outlets
of the holder and, in the recess, a clamp including two
and the other part having a bit seat facing the other out
parts for gripping therebetween a bit which projects from
let, a bit fitting between said parts with sides bearing on
the recess beyond both of the aforesaid faces, one of the 30 said seats respectively, the positions -of said seats deter
parts having a bit seat facing -toward one of the outlets
mining the extent to which the bit projects through said
and the other part having a bit seat facing the other outlet,
outlets respectively, and means »for adjusting each of said
the positions of the seats determining the extent to which
parts transversely of its seat to vary the extent the bit
the bit projects through the outlets respectively, and means
projects through the corresponding outlet, said recess being
for adjusting each of the parts transversely of -its seat to 35 rectangular in cross-section.
vary the extent to which the bit projects through the cor
2. Adjustable bit-clamping means comprising a holder
responding outlet, the recess being rectangular in cross
having a recess with an outlet through each of two ad
section to facilitate its formation. In the preferred em
jacent -faces of the holder, said recess being rectangular in
bodiment the two adjusting means are accessible from ad
cross-section, in the recess a clamp including two parts for
jacent faces of the holder, preferably the aforesaid faces, 40 gripping therebetween a bit which projects from the recess
and are carried by the same part of the clam-p.
beyond both of said faces, one of said parts having a bit
For the purpose of illustration typical embodiments of
seat facing toward one of said »outlets and the other part
the invention are shown in the `accompanying drawings in
having a bit seat facing the other outlet, a bit fitting be
which
tween said parts with sides bearing on said seats respec~
45 tively, the positions of said seats determining the extent to
FIG. yl is a side view of a rotary cutter head;
FIG. 2 is an end view;
which the bit projects through said outlets respectively,
FIG. 3 is a section on line 3-3 of FIG. 2;
and means for adjusting each of the parts transversely of
FIG. 4 is a section on line 4_4 of FIG. l; and
its seat to vary the extent the bit projects through the cor
FIGS. 5 and 6 are views like FIGS. l and 2 showing a
responding outlet, said means being accessible from ad
modification.
~
The particular embodiment of the invention shown in
FIGS. l to 4 comprises a rotary holder l, such as a milling
head, having a peripheral recess 2 which extends from
50 jacent faces of the holder respectively.
3. Adjustable bit-clamping means comprising a holder
having a recess with 4an outlet through each of two ad
jacent faces of the holder, in the recess a clamp including
-two parts for gripping therebetween a -bit which projects
peripheral face and also on each end face. One side of 55 from the recess beyond both of said faces, one of said
the recess has serrations 3 extending parallel to the axis
parts having a bit seat facing toward one of said outlets
of the head and the other side has serrations 4 extending
and the other part having 4a bit seat facing the other out
at right angles to the serrations 3. Disposed in the recess
let, a bit fitting between said parts with sides bearing on
is a clamp comprising two parts 5 and 6 for clamping
said seats respectively, the positions of said seats deter
therebetween a bit 7, the clamp parts having serrations 60 mining the extent -to which the bit projects through said
meshing with the serrations 3 and 4. The part 5 has a
outlets respectively, and means for adjusting each of said
seat 8 for the bit 7 which faces the end outlet of the recess
parts ltransversely of its seat to vary the extent the bit
2 and the part 6 has a bit seat 9 which faces the periph
projects through the corresponding outlet, said means be
eral outlet of the recess. The -part 6 has two slots 10 so
ing carried by one of the parts.
that it may be expanded and threaded into the part. At 65
4. Adjustable bit-clamping means comprising a holder
each slot is a tapered screw 11 for expanding the part.
having a recess with an outlet through each of two ad
Threaded into an opening 12 in the lleft-hand end of the
jacent faces of the holder, in the recess a clamp including
part 6 (FIGS. l and 3) is a screw 13 for forcing the part
two parts 4for gripping therebetween a bit which projects
5 to the right. Threaded through the part 6 is a screw 14
from the recess beyond both of said faces, `one of said
which bears on the bottom 15 of the recess 2 so as to push 70 par-ts having a -bit seat facing toward one of said outlets
the part 6 toward the peripheral outlet ofthe recess when
and the other part having a bit seat facing the `other out
it is threaded inwardly.
let, a bit fitting between said parts with sides bearing on
end-to-end of the head so that it has an outlet on the
3,058,198
3
said seats respectively, the positions of said seats determin
ing the extent to which the bit projects through said out
lets respectively, and means for adjusting each of said
parts transversely of its seat to vary the extent .the bit pro
jects through the corresponding outlet, and means for
clamping the parts »together Áwith the lbit therebetween, all
projects from the recess beyond both of said faces, one of
said parts having a bit seat facing toward one of said out'
lets and the other part having a -bit seat facing the other
outlet, a bit fitting between said parts with sides bearing on
said seats respectively, the positions of said seat deter
mining the extent to which the bit projects through said
outlets respectively, «and means for adjusting each of said
parts transversely of its seat to -vary the extent the «bit
of Said means being carried 4by one of the par-ts.
5. Adjustable bit-clamping means comprising a holder
having a recess with an outlet through each of two ad
projects through the corresponding outlet, the recess and
jacent faces of the holder, in the recess a Aclamp including 10 each of said parts having interñtting serrations extending
two parts for gripping therebetween a bit which projects
transversely of the seat of the part, means »for shifting
from the recess -beyond both of said faces, one of said
each part lengthwise of its serrations, and means for
parts having a bit seat facing toward one of said outlets,
clamping the parts together with the bit therebetween, all
and the other part having a bit seat facing the other ont
of said means being carried by one of the parts.
let, a -bit fitting =between said parts with sides bea-ring on
8. Adjustable bit clamping means comprising a holder
said seats respectively, the positions of said seats deter
having a recess with an outlet through each of «two ad
mining -the extent to whichjthe `bit projects through said
jacent faces of the holder, opposite faces of the recess
outlets respectively, the recess and «each part having inter
being hat, in the recess a clamp including two parts A‘bear
ñtting serrations extending transversely of the seat of the
ing on said recess faces respectively with a bit space there
part, and means for adjusting each part lengthwise of its 20 between, one of the parts having a bit seat at one side of
serrations.
said space facing toward one of said outlets and the other
6. Adjustable bit-clamping means comprising a holder
part having a bit seat extending transversely of said seat
having a recess with an outlet through each of two ad
-and facing the other outlet, and means for adjusting each
jacent faces of the holder, the recess -being rectangular in
of said parts transversely of its seat.
kcross-section, in the recess a clamp including two parts 25
9. Adjustable bit clamping means according to claim 8
for gripping therebetween a -bit which projects from the
further characterized in that said means are on the same
recess ybeyond both of said faces, one of said parts having
part.
a >bit seat facing toward one of said outlets and the other
10. Adjustable bit clamping means according to claim
part having a ‘bit seat facing the other outlet, a bit fitting
9 further characterized in that said same part also carries
between said parts with sides bearing on said seats respec 30 means for locking the parts in adjusted position.
tively, the positions of said seats determining the extent to
which the »bit projects through said outlets respectively,
the recess and each part having interfitting serrations ex
tending transversely of the seat of the part, and means for
adjusting each part lengthwise of its seri-ations, said means 35
being accessible from adjacent faces of the holder re
spectively.
7. Adjustable 4bit-clamping means comprising a holder
having a recess with an outlet through each of two ad
jacent faces of the holder, in the recess a clamp includ 40
ing two parts yfor gripping therebetween a bit which
References Cited in the file of this patent
UNITED STATES PATENTS
1,836,472
2,664,617
2,805,468'
2,859,507
2,900,704
Jacobs _______________ __ Dec. 15,
Kralowetz ___________ __ Jan. 5,
Williams ___________ __ Sept. 10,
Knell ______________ __ Nov. 1l,
Sweet ______________ __ Aug. 25,
1931
1954
1957
1958
1959
FOREIGN PATENTS
V1,143,568
France ______________ __ Apr. 15, 1957
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