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Патент USA US3089273

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May 14, 1963
Filed Feb. 20, 1961
United States
I atent ‘IO:
Patented May 14, 1963
offset therefrom to enable wedging effect by the key means.
This aperture 36 includes an aperture 38 in the upper
wall element 3-7 and an ‘aperture 40‘ in the lower wall ele
ment 39, the aperture 40 having preferably an enlarged
counterbore 42 in the outer surface of the wall element.
James A. Henkel, Park Forest, 111., assignor to Amsted
Industries Incorporated, Chicago, 111., a corporation of
New Jersey
Filed Feb. 20, 1961, Ser. No. 90,333
1 Claim. (Cl. 37-142)
The nose 18 is cut off on its lower portion to form a ?at
44 in which is received an enlargement or projection 46
of the bottom wall element 39 of the tooth to provide
greater bearing surface 48 for engagement by the key
The present invention relates to a dipper tooth assem
bly and more particularly such an assembly with novel 10 means.
The key means 14 includes a key adapter 50 and a
key means for retaining the tooth and the adapter on
key 52. The key adapter 50 is shown in side view
which it is supported in the intended assembled relation.
in FIGURE 1 and face view in FIGURE 3 and will be
A broad object of the invention is to provide such as
seen to have a notch or recess 54 and a front surface 56
sembly and key means which is of simple and inexpensive
which is shaped at its lower end for engagement with the
surface 48. The key adapter is ?tted in the aligned aper
Another object is to provide such a key means which is
tures and ?tted against the upper wall element 37 of the
of all metal construction and is operative for retaining
tooth in such a way that the notch or recess 54 receives a
the tooth and its adapter in metal-to-metal ?rm mounting
portion of the wall element. The shoulders formed at
Still another object is to provide a novel two-part key 20 the upper and lower extremities of the notch engage the
wall element and positively lock the key adapter against
means facilitating wedging effect of the tooth with its
displacement from the aperture in both directions longi
mounting adapter, and positive locking of the key means
tudinally. The key adapter has a rear Wedging surface
after it is placed in position.
58 which may be of planar shape.
Other objects and advantages of the invention will ap
The wedge key 52 is of tapered shape as shown in
pear from the following detail description taken in con
FIGURE 1 and has a planar wedging surface 60 ?tted to
junction with the accompanying drawings wherein:
engage the surface 58 of the key adapter. At its narrow
FIGURE 1 is a side view of a dipper tooth assembly
end the wedge key is provided with an elongated reduced
including the key means of the present invention, partial
projection 62, the wedge key being substan
ly in elevation and partially in section;
FIGURE 2 is a plan view of the assembly of FIGURE 30 tially longer than the vertical dimension of the tooth, and
of such length that when the wedge key is in place the
1; and
projection can be bent over the marginal edge of the wall
FIGURE 3 is a face view of one of the key members
element 39 de?ning the aperture. The wedge key is re
of FIGURE 1 and taken approximately at the line 3—3
lieved at 64 so as not to interfere with the adjacent por—
of FIGURE 1.
tion of the lower wall element of the tooth.
Referring now in detail to the drawings the assembly
To place the key means in position, the tooth is ?tted
shown in FIGURE 1 includes a tooth adapter 10 of con
to the tooth adapter to the position shown in FIGURE
ventional construction and a tooth 12 mounted thereon
1, or as nearly to that position as may be practically done.
and secured to the tooth vadapter by novel key means in
key adapter 50 is then ?tted into place, the apertures
dicated generally at 14 and described in detail herein
being aligned suf?ciently to enable insertion of this ele
ment, and in so ?tting it into position, the notch 54 is dis
The tooth adapter 10 is utilized for mounting directly
posed to the rear and receives the adjacent portion of the
to the dipper which is not shown herein, but such dipper
upper wall element 37 of the tooth. The wedge key 52
and the means of mounting the tooth adapter thereon
is then applied by inserting the reduced end 62 in the
are conventional and well known. The tooth adapter in
aperture, which is of course in straight position as shown
cludes an enlarged body portion 16 which projects for 45 in dot-dash lines in FIGURE 1 and driven into place.
wardly from the edge of the dipper and a forwardly ex
This wedge key produces the desired wedging action for
tending projection or nose 18 of generally tapered shape,
drawing up the tooth into ?rm supporting engagement on
having an upper bearing face 20 and a lower bearing face
the tooth adapter and when the wedge key has been driven
22 converging in forward direction. The projection or 50 into proper distance, the lower extremity 62 is bent over
nose 18 is provided with an aperture 24 extending trans
to the full line position shown, whereby it positively locks
versely therethrough and, in the mounted position of the
the wedge key against displacement in upward direction.
assembly, disposed vertically.
The wedge key is made of malleable material to en
The tooth 12 has a recess or cavity 26 at its rear end
receiving the projection or nose 18 and telescoped there
with. This recess or cavity has an upper bearing face 28
and a lower bearing face 30 engaging and inclined com
plementally to the respective faces 20 and 22 of the nose
18. These surfaces, together with the key means 14 con
stitute the sole means for mounting the tooth to the tooth
able this bending operation.
The construction of the invention has the further ad
vantage that the key adapter, upon its insertion into the
aperture is in position for engaging the nose of the tooth
adapter and both wall elements of the tooth, and bear on
them, as the wedge key is being driven in, as well as after
the wedge key is in place.
I claim:
'In a dipper tooth assembly, an adapter having a body
portion, a nose projecting forwardly from said body por
tion and having forwardly converging upper and lower
to the tooth adapter and brought into ?rm bearing engage 65 surfaces and a ?at face substantially parallel to said upper
surface and merging with said lower surface to de?ne a
men therewith, a space indicated at 34 may be provided
recess adjacent said body portion, said nose having an
between the tooth and the tooth adapter.
aperture extending between said upper surface and said
The tooth is provided with an aperture 36 transversely
through the upper and lower wall elements of the recess 70 ?at face, a tooth having forwardly converging upper and
lower walls engaging the upper and lower surfaces on said
or cavity 26, and at least partially aligned with the aper
nose, an enlargement on said lower Wall positioned in said
ture 24 in the assembly of the parts, although partially
adapter, and preferably there is slight spacing between the
lateral surfaces of the nose and cavity as indicated at 32
in FIGURE 2. The shape and dimensions of the cavity
relative to the nose are such that when the tooth is ?lted
recess, said upper wall and said enlargement having open
References Cited in the ?le of this patent
ings in registry with said aperture, a key adapter extend
ing through said openings and aperture and provided at
one end with spaced shoulders engaging said upper Wall
therebetween, the other end of said key adapter having
an inclined shoulder engaging said enlargement, a tapered
Buchheit ____________ __ Sept. 9, 1873
Standfuss ____________ __ June 24,
Crawford ____________ __ Mar. 2,
Baer ________________ __ May 3,
Reinhardt et al _________ __. Nov. 3,
and aperture and engaged between said nose and said key
Stratton ____________ __ June 13,
adapter, and a tongue on the lower end of said Wedge key 10
Stephenson __________ __ Aug‘ 1, 1961
Great Britain “a _______ __ Nov. 9, 1944
wedge key extending downwardly through said openings
bent beneath the lower end of the key adapter and the
lower surface of the enlargement.
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