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Патент USA US2403607

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July 9, 1946.
Fìled'Dec. 21, 1942
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Patented July 9, i946
Helmer Ogard, Chicago, Ill., assignor to Arm- l
strong-Bray & Co., Chicago, Ill., a corporation
of Illinois
Application December 21, 1942, serial No. 469,588
s Claims.
(C1. 74-23`6>
This invention relates to belts of the-so-called
V-type having tapering side walls which friction
ally engage complemental walls on driving and
driven pulleys or sheaves.
Ordinarily, such belts are composed of rein
forced rubber and molded as a single integral
the invention _as expressed- in the .appended
The_improved belt shown isfcfv the typev in Y
which side surfaces Ill composed ofwrubber, syn.
thetic rubber, >or friction material havingY com
parable physical properties taper and converge
toward each other sojas to fit intothe V-groove
piece. These are subject to well recognized
objections such as stretching inservice use which
in a pulley or` sheave. Il. Inpassing around the
necessitates replacement or adjustment and in
pulley, the belt becomes compressed between‘t-he
multiple belt drives results in uneven distribu 10 groove ywalls l2 with suflicientforce to transmit
tion of the load. Single piece belts are difficult
vthe torque withoutÀ substantial slippage. to install in certain machines and must be stocked
l In accordance withv thefpresent’invention, the
in large quantities because of the many sizes and
belt surfaces Ii! `constitute the opposite `sides of
lengths in which they are used.
relatively short molded blocks I3 which have-a
The general object of the present inventionl 15 generally flat bottomjsurface I4 andpreferably
is to overcome these andother disadvantages
a bulging 'outer surface 'I5;v ,The‘y blocks are
through the provision of a V-belt composed of
hollow and arranged in ~end-to-end relationfalong
detachably connected sections.
an endless flexible chain vcomprising relatively
Another object is to provide a V-belt in which
short detachably'connected links I6"which are
the driving force is transmitted by a flexible 20 composed of metal such as heat-treated steelk so
non-extensible chain frictionally connected to
that the chain is non-extensible.>
" '
the sheaves through a series of V-blocks car
' The individual chain links are flat atoneend
ried by the chain links and composed of resilient
and bifurcated at the other to receivethe flat
friction materialsuch as rubber. .
endfof the adjacent link'. ' `To-enable the links to
A 'further object is to provide a novel connec
tion between each chain link and the associated
be punched from sheet metal, each is vcomposed
yof two pieces I8, lyinggagainst each other> at
their flat ends I9 and spaced apart at the bent
vThe invention also resides in the novel struc
ends ZIJ.> Both ends are apertured to snugly
`tural character of the parts which facilitates
receive a pivot pin" 2l whose :ends 22 project
molding of the V-blocks and the formation of 30 laterally a short distance beyondthe outer sur
the metal parts as sheet metal stampings.
faces of the link ends 20L vIf desired, the'pi'n
Other objects and advantages of the invention
may be composed of bronze or-other bearing
will become apparent from the following detailed
description taken in connection with the accom
The links
I6 extend
panying drawing, in which
Figure 1 is a fragmentary side elevational view
molded in the blocks I3 centrally ’thereof'and
having enlarged end recesses to receive the over
of a V-belt embodying the present invention, one
lapping ends of the' adjacent links. >Concave
belt pulley being shown in section.
recesses 24 are 'molded in opposite ends of the
Fig. 2 is a Yfragmentary plan view of the belt.
blocks to receive> the pin> ends 22 and thus per
Fig. 3 is a section taken along the line 3_3 40 mit the blocks to be located close together vwith
of Fig. 1.
the pins 2l disposed between’them. In longi
tudinal cross-section, the end surfaces 25 ofthe
blocks converge inwardly to a» small degree to
Fig. 6 is a perspective view of one of the
permit bending of the belt around the pulley
45 in spite of the close spacing of the blocks.
Fig. 7 is a perspective View _of one of the but-k
»The blocks I3 may be composed of solid rubber
tress plates.
or like -material and need not-incorporate rein
While the invention is susceptible of various
forcing cords because the driving _force' is‘trans
modifications and alternative constructions, VI
mitted by the metallic chain; The increments
have shown in the drawing and will herein de- f' of this force derived frictionally at‘the ‘surfaces
scribe in detail the preferred embodiment, It is
IIJ ofthe respective blocks are transmitted in
to be understood, however, that I do not intend
dividually to the chain links I6 through the me
Figs. 4 and 5 are sections taken' respectively
along the lines ll-Ll and 5_5 of Fig. 3.
to'limit the invention by such disclosure but aim
dium of the projecting pin ends 22. These have
to cover all modifications and alternative con
bearing engagement with buttress plates 26 which
~ structions falling within the spirit and scope of s
are of the same general shape as the end sur
other end to receive the adjacent link, pins piv
otally connecting the overlapping ends of said
faces 25 of the blocks but are slightly smaller in
area so as to allow for compression of the blocks
in the pulley grooves. The plates are deformed
links with their ends projecting laterally from the
links, blocks of friction material each carried by
as indicated at 21 so as to seat in the block re
cesses 24 and provide recesses on the other side
one of said links and having end recesses receiving
said overlapping ends, plates each abutting one
end of each block and having depressions there
in yproviding seats for the projectingT ends of said
for reception of the pin ends 22. There are two
plates 26 between each adjacent pair of blocks
I3 and these are arranged with their deformed
portions 21 disposed in the recesses 24 of the dif
pins, and means formed on said plates and act
ferent blocks. One plate of eachpair lies in full
contact with the block ends 25 to which the in
crement of the transmitted force is thus distrib
uted evenly. Beyond the ends of the .pins 271, one
plate 25 of each pair is deformed toa lesser degree.
ing to hold said pins against endwise displace
4. A V-belt comprising a succession of aper
tured blocks having tapering side walls, a suc
pin ends 22 and prevent any possible endwise dis
placement of the pins. In assembling the parts,
the blocks are compressed sufficiently to -permit
entry of the pins through the chain links past
one of the plate portions 28. Thereafter, the
resiliency of the blocks serves to hold the plates
ing said links and having projecting ends, and a
plate interposed between each of said .pins and
the end of one adjacent block, each plate abut
ting against said adjacent block and having
,bearing engagement with said ends of the asso
tightly against the pins.
5'. A V-belt comprising a succession of aper
tured blocks having tapering side walls, a succes
sion ci links each extending through and sup
Cession «oî links each extending through and sup
so as to provide portions 28 which engage the 15 porting one Qi Said blocks, pins pivotally connect
ciated pin.
It will be observed that the belt constructed> as
above described may be made up in any desired
porting one of said blocks, pins pivotally connect
ing said links and each disposed at the junc
sections, The maintenance of a large stock of
tions between two adjacent blocks, and a plate
different belt sizes is therefore unnecessary
interposed between each of said pins and the end
Since the links are connected detachably by the
of one adjacent block, each plate abutting against
pins, the belt may be assembled readily in lani7
machine and this, without the use of special fas 30 said, adjacent block and having bearing engage
teners. The chain being-non-extensible and uni
ment with the _associated pin.
6. A V-belt comprising a lplurality of chain
form in length forA any' given number of sections,
links each having a bifurcated end straddling the
the belts will not stretch and, when used in mul
length simply by selecting thevproper number of
tiple, will always carry equal parts of the load.
other end of the adjacent link, cross-pins pivot
Through the use of the buttress plates 26 and
by connecting each block I3 to thev chain, n0 one
block is stressed unduly, and the total driving
force is sustained by the chain.
While I have shown and described herein-a
. ally connecting the overlapping ends of said links
single belt embodying the features of the present
invention, it will be understood that the inven
tion is equally well adapted to belts for both single
and multiplebelt drives.
I claim asmy invention:
1. ,A V-belt comprising a, plurality of chain
links» each having a bifurcated` end straddling the
other end of- the adjacentlink, cross-pins piv
otally connecting the overlapping ends of'V said
links with their ends projecting laterally from the
links, blocks of yieldable friction material each 50
carried by one of said links and having end re
cesses; receiving said overlapping» ends, and a but
tress plate disposed between the ends of adjacent
blocks and having depressions therein providing
seats for said pin;V ends, whereby» the frictional `
forces applied to said blocks will be transmitted
to said pin through the medium of> said plate.
with their ends projecting laterally from the
links, blocks of yieldable friction material each
carried by one of said links and having end re
cesses, receiving sad overlapping ends, and a but
tress ,plate or plates disposed between the ends
of adjacent >blocks and having depressions there
in providing seats for. said pin ends, whereby the
Africtional forces applied to said blocks will be
transmitted to said .pin through the medium of
sad plate or> plates.
'7; A V-belt comprisingv a plurality of longi
tudinally arranged links, pins v‘pivotally connect
'ing- ¿the ends ofl >said links, blocks of yieldable fric
tion material carried by the respective links, and
Vlbuttress'~plates> abutting the ends of said blocks
and yhaving portions extending over the ends of
the pins to hold the pins against endwise dis
placement, saidY blocks ‘being compressible to `per
mit shifting of said portions of the plates away
from the ends of the dpins for removal and inser
tion of the latter.
8. A V-belt comp-rising a plurality of longi
2. A V-belt comprising a plurality; of chain
tudinally arranged links, pins pivotally connect
links each comprising two sheet metal pieces dis
ing the ends of said links with the ends of the
posed sidev by side at one end and spaced apart 60 pins projecting laterally from the links, blocks
.at the other end to receive the adjacent link, pins
of yieldable friction material carried by the re
pivotally connecting the overlapping ends of said
spective links, and buttress plates abutting the
links with their ends projecting laterally from
ends of said blocks and having depressions there
the links, blocks of friction material each carried
in to receive theÍ projecting ends of the pins with
by~ one of said link-s and having end recesses re
the portions of the plates adjacent said depres
`ceiving saidy overlapping ends,; and; plates each
abutting one end ofV each block and; having de
pressions therein providing seats'> of the project.
ins ends. Of said pins,
sions shaped to extend over the ends of the pins
to hold the latter against endwise displacement,
the plates being shiftable by compressing said
lblocks to Vmove said portions away from the ends
3-. A V-belt comprisinsfa plurality or- enam links 70 of‘the pins to permit removal and insertion of the
eachV comprising tWQ sheet metal piecesv disposed
Side by sida at one and and spaced aparaat the
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