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È. ìäî E46.
C. A. BREEZE
TRACTOR WHEEL ATTACHMENT
Filed Deo. 10, 1943
2,499,246
Patented Oct. 15, 17946
2,409,246
-TU-NITE!) STATES PATENT OFFICE *
2,409,246
TRACTOR WHEEL ATTACHMENT
Charles Alfred Breeze, Aberdeen, Scotland
Application December 10, 1943, Serial No. 513,681
In Great Britain December 12, 1942
11 Claims.
1
(Cl. 301-39)
2
` This invention relates to the wheels of agri
ground in known manner. These lugs or like pro
cultural machines and tractors, the wheels of
jections are commonly arranged in two annular
which are provided on their rims with lugs,
series on the wheel rim, the lugs of one annular
strakes or projections to obtain a grip on soft
series being staggered in relation to those of the
ground, and my invention has for its object to 5 other series, so that they alternate with one an
provide an attachment for fitting to the wheels
for enabling them to be used on hard surfaces,
such as public roads, or where damage to the sur
other. Only one series is shown in Fig. l.
The attachment according to my invention'
comprises a number of shoes 9, equal in number
to the number of lugs or projections 8 in the an
face is undesirable, by providing a larger bearing
surface.
10 nular series formed on the wheel rim. The shoes
According to my invention the attachment
9 are ñexibly connected together at distances
comprises a plurality of shoes ñexibly connected
apart between their centres equal to the distance
together in band formation around the wheel,
between the centres of the extremities of adja
each shoe being adapted to ñt over one of the
cent lugs 8, and each shoe 9 is so formed that it
lugs, strakes or like projections of the Wheel rim 15 can rock upon the extremity of one of the lugs
and preferably rock thereon in the direction of
8. Anjelastic connection between one or more
wheel motion, thus enabling the shoes to adapt
pairs of shoes 9 enables the attachment to be
readily expanded circumferentially around the
themselves to inequalities in the road surface and
to forces acting on them, while providing bearing
Wheel rim, to enable the shoes to be fitted to or
removed from the lugs or projections on the
surfaces for the wheel,
Wheel. In Fig. l I have shown springs I0 con
In carrying out my invention, each shoe may
be in the form of a metal or other block provided
necting adjacent shoes together to form an elas
with a ñat or convex or suitably shaped tread
tic band having the shoes attached at regular
surface and provided on its inner side with a
intervals thereto. Obviously the band *couldv be
notch or recess to receive and position the shoe 25 made' with one or more disconnectible joints to
upon the outer extremity of the lug, strake or
enable it to be fitted to or removed from the wheel
like projection on the wheel rim, the said notch
rim, in which case it may be found unnecessary
or recess being V-shaped or otherwise widening
to provide an elastic connection between the
outwards to enable the shoe to rock on the lug,
shoes.
,
strake or like projection of the wheel rim. Adja 30 Figs. 2, 3 and 4 show details of a convenient
cent shoes are connected together by springs,
form of one of the shoes, which are preferably
chains, links or other flexible connections to form
made of cast iron or steel. The form of shoe
a band adapted to be fitted around the wheel and
shown has a convex tread surface I I and is formed
serving to hold the shoes in position, while per..
on its inner side with a divergent recess I2 to
mitting them to rock during rotation of the Wheel. 35 receive and rock upon the extremity of the lugs
' In order that the invention may be more clearly
-8 indicated in broken lines in Fig. 2. Lugs 22
understood, reference is hereinafter made to the
on the ends of the shoe are provided for the re
accompanying explanatory drawing illustrating
ception of pins or bolts I3 for securing the ends
examples of tractor wheel attachments according
of the springs I0 to the shoes. Part of one of the
40 springs I 0 is shown in Fig. v4 attached to the
to the invention.
Fig. 1 is a side View of a tractor Wheel ñtted
pin I3 by a link or shackle I4.
'
with my attachment. Fig. 2 is a half elevation
The use of springs I0 enables the attachment
and half sectional side view of one of the shoes.
to adjust itself to wear on the lugs 8 and shoes
Fig. 3 is a view of the shoe half in end view and
9, butA chains, links, or other flexible connections
half in cross-section. Fig. 4 is a View half in plan 45 may replace one or more of the springs I0 and
and half in section on line A-A of Fig. 2.
the connecting chains or other ñexlble connec
Figs. 5 and 6 are sectional views of a slightly
tions may be ñtted with means for adjusting them
modiñed form of shoe having a resilient insert
to length to adjust the attachment for Wear on
or spring plate, shown in unstressed condition in
the lugs or shoes.
Fig. 5 and shown in Fig. 6 in the position it as 50
Figs. 5 and 6 illustrate an alternative form
sumes under load.
of shoe in which the divergent recess I2 is ñtted
Referring firstly to Fig. 1, this shows a known
with a somewhat similarly shaped resilient lin
type of tractor wheel, the rim 1 of which carries
ing or V-shaped spring plate I5 which may be
a series of lugs, strakes or projections 8 which
retained in position by lips or projections I6 on
are adapted to give the wheel a grip on soft 55 the edges of the recess I2, or the spring plate
2,409,246
3
4
may have slotted holes engaged by pins or pro
jections extending outwards from the face of the
recess I2. As shown in Fig. 5, the apex of the
spring plate l5 does not bear against the inner
extremity of the recess l2 when the spring.plate
is in an unstressed condition, but when loaded
by pressure on the lugs 8 as indicated in Fig. 6,
wheel, comprising a plurality of tread members,
shorter in length than the distance between said
-projections and each removably fitted to one of
the said projections, and means flexibly connect
ing said members together in band formation,
said means comprising elastic connections be
tween adjacent tread members.
the spring plate I5 is deflected inwards. Thusv
the spring plate l5 serves to reduce vibration due
tially spaced projections on the rim of a tractor
6. _An attachment for encircling, circumferen
to any irregularities of the wheel rim or lugs 8 10 Wheel, comprising a plurality of tread members,
shorter in length than the distance between said
or due to irregularities in the surface over which
projections and each removably i'itted to one of
the wheel is travelling, thereby reducing‘vibra
the saidl projections, and means flexibly connect
tion and road shocks. The springl plate l5 can
ing` said members together in band formation,
also be readily renewed when worn.
It will be understood that the design and con# 15 said means comprising springs connecting adja
cent tread members.
struction of the shoes may be modiñ'ed: without
'7. A tractor wheel attachment comprising a
departing from the scope of the appended claims'.
plurality of tread members, each presenting an
For example, the tread surface may bevilatY or
outer tread surface and each having a recess on '
faceted, and may be sliod with rubber or other
hard wearing material.
20 its inner side,vr a resilient element in said recess,
said element being adapted to resiliently ñt over
Iclaim:
1.*An attachment for encircling circumferen
one of the projections on the rim of a tractor
tially spaced projections on the rim of a tractor
Wheel, and means, flexibly connecting said mem
bers together.
wheel, comprising a plurality of shoes, each
8. A tractor wheel attachment comprising a
shorter in length than the distance between said 25
plurality of tread members, each presenting an
projections so as to detachably ñt over one of said
outer tread surface and each having a divergent
projections on the tractor wheel rim and pro
recess on its inner side, a resilient V-shaped ele
vide a bearing surface, and elastically extensible
ment in said recess, said element being adapted
and contractible means flexibly connecting said
30 to resiliently ñt over one of the projections on
shoes together in band formation.
the rim of a tractor wheel, and means flexibly
Y 2. An attachment for encircling circumferen
connecting said members together.
tially spaced projections- on the rim of a tractor
9. A detachable shoe for a tractor wheel rim
wheel, said attachment comprising a plurality
projection, comprising a member presenting an
of members, each of said members having a di
vergent recess on its inner side for receiving one 35 outer arcuate tread surface and an inner V
shaped recess, and lugs at the ends of said mem
of its projections and being shorter in length than
ber for attachment to means connecting said shoe
the distance between said projections to permit of
to adjacent shoes.
rocking movement in the direction of Wheel mo
10. A detachable shoe for a tractor wheel rim
tion when fitted on one of said projections and
each of said. members presenting an outer tread 40 projection, comprising a member presenting an
outer arcuate. tread surface and an inner V
surface,~ and means flexibly connecting said mem
shaped recess, a resilient V-shaped metal plate
bers together to encircle the wheel rim.
fitted in said recess, means for retaining said
3. A tractor wheel attachment comprising a
plate in said recess in unstressed condition and
plurality of members each >presenting an outer
tread surface and each provided on its inner side 45 for permitting said plate to be deflected inwards
and resiliently seated in said recess, when stressed
with. a divergent. recess to receive and position
by pressure on said plate, and means for enabling
the member on the. outer extremity of a'. projec
said' member to be connected to adjacent> shoes.
tion on the rim of a tractor wheel and to permit
11, Incombination with a tractor wheel hav
said member to rock in the direction of wheel mo
tion, and means flexibly connecting said mem 50 ing projections extending in annular series radi
ally at intervals from the wheel rim, said pro
bers together in band formation for encircling
jectionsterminating in reduced outer extremities,
the wheel rim.
means detachably encircling said Wheel rim and
4. An attachment for encircling circumferen
projections, said means comprising a plurality of
tially spaced projections on the rim. of a tractor
tread members, one for each wheel rim projection,
wheel, comprising a plurality of tread members,
each of saidmembers having a recess rockably
shorter in length than the distance between said
and removably fitted upon the outer extremity of
projections and each removably ñtted to one of
one of said projections, and means flexibly con
the said projections, and means flexibly connect
necting said members together in band formation
ing said members together in band formation,
said means including an elasticv connection be 60 to hold them in engagement with the Wheel rim
projections, while permitting said members to i111
tween a pair of adjacent tread members.
dividually rock in the direction of wheel motion.
5. An attachment for encircling circumferen
'
CHARLES ALJE‘REDv BREEZE.
tially spaced projections on the rim of a tractor
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