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Патент USA US2048053

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' July 21, 1936.
Filed Aug‘. 16, ‘1934
,7/7-zL@'. 3
loip'razzif W567i
Patented July 21, 1936
V , Frank w. Bennington, PortisfKana, assig'noi- of
one-half to Roy L. Hamilton, Beloit, Kans.
" ‘
l _
Application August 16, 1934, SerialNo. 740,158
"8 Claims.‘
This invention'is a vehicle brake primarily in
tions I6 and I1, said bushings being relatively
spaced with respect to each other. The arrange
such use.
ment is such that the brake shoe is mounted
‘A _> One of the objectsof the invention is to pro-. upon and slidable- with the sleeve l4, so that the
’ 5 ivide-a simple brake of the character mentioned, arcuate portion thereof is moved in radial paths
toward and away from the ?ange of the brake
in which the parts are so constructed and ar
ranged as to apply equalized pressure. simultane
drum. It will be noted that the hub portions I6 '
ously to all of the brake shoes during the braking and H are located intermediate between the
operation. A further object is to provide means ends of the respective shoes.
Movement of the brake shoes is e?ected by
103101‘ so supporting the brake shoes, that they are
constrained. to travel in rectilinear paths which means of an eccentric E, connected to the sleeves
are disposed radially with respect .to the brake M by brake arms 20 and 20a respectively. The
drum. ,A further. object is to provide an inex
eccentric E may be of any desired construction,
tended for motor vehicle use, but not limited to
H‘pensive form of, braking mechanism constructed
of few partsin such manner that a maximum
of braking power is obtainable with, a minimum
number of parts, and so constructed and arranged
that it will not readily get out of order, and with
,the parts readily accessible, so that repairs and
201*replacements may be quickly and easily‘e?‘ected.
The invention will be hereinafter fully set forth
and particularly. pointed out in the claims.
In the, accompanying drawing:. Figure 1 is a side elevation illustrating a brak
.28: ing
mechanism constructed in accordance with
the invention. Figure 2 is a horizontal sectional
viewon the'line 2-2, Figure 1. Figures 3 and 4
are detail side and rear views, respectively, illus
‘ tratlng one of the brake shoes.
Referring to the drawing, |0 designates a sup
porting platewhich is adapted to be supported in
suitable manner by the vehicle, and provided with
a central opening for the passage of the wheel
at '
shaft is a cam 22, having a reduced portion 23.
The arm 20 is provided with a collar portion
which encircles a sleeve l4 and is-lnterposed be
tween the bushings “! and I9, thereof. The other 20“?
end of said arm 20 is provided with a double ring
or fork portion 24 which encircles the reduced
portion 23 of the cam 22. One end of the arm 20a
is provided with a collar portion to encircle a
sleeve‘ M in the same manner as the arm 20, the
other end of said arm 20a having a thin collar
||, said plates being held in position by suitable
ing them would pass through the center of the
opening in the plate I0.
Slidably mounted on each anchor stud H, is a
sleeve l4, having an elliptical bore l5, comple
mental tothe, stud, the longer diameter of the
bore, however, being greaterthan the correspond
ing diameter of the stud, so that the sleeve may
50 slide upon the stud without rotating. It will be
noted that the longer diameter of the stud is
- arranged radially with respect to the brake drum
tion in engagement with the cam portion 23, by
means of a cover plate. 29, which is removably
maintained in place by a screw 30. The shaft 2|
is rotated by any suitable means, such as a
radial arm 3|, connected to a brake pedal or
other operating means (not shown).
In operation, when the brake pedal is moved
to braking position, the shaft 2| is rotated, there
by imparting corresponding rotation to the cam
22. The effect of this is to push the brake rods
20 and 20a in such manner ‘as to slide the sleeves
transversely of the studs ll, thereby moving the
brake shoes in opposite radial directions toward .
the rim of the brake drum, and applying direct 50'
braking pressure by contacting the full areas
of the brake shoes with the brake drum. Obvi
B, so that all sliding movements of the sleeve
ously, reverse rotation of the shaft 2| will move
l4 are in radial directions.
the brake shoes away from the ?ange of the
brake drum.
Each brake shoe S is of arcuate form and com
plemental to the ‘?ange of the brake drum, and is
provided with relatively spaced hub portions l6
and IT, to receive a sleeve‘ I4. Bushings l8 and
I! are interposed between the periphery of each
60 sleeve l4 and the inner surfaces of the hub por
portion 25, adapted to encircle the reduced por
tion 23 of the cam 22, between the separated collar
portions 24 of the arm 20. The collar portions of
the arms 20 and 20a which encircle the sleeves
I4, together with the bushings l8 and I9, are re
tained in place by means of cover plates 26,
through which extend projections 21 of the stud
means, such as cotter pins 28. The ends 24
and 25 of the brake arms are retained in posi
‘ through anopening in the plate l0, and retained
in positienby a nut I3. It will be observed that
the studs _ H are disposed diametrically opposite
to each other so that an imaginary line connect
ried by the plate “1-. Integrally formed with said
anchor-studs II are secured to plate ID in such
one end with V a threaded shank I2, projected
but as shown consists of a shaft 2|, rotatively
mounted in a suitable bearing member 2|a, car
hub 7(not shown) -., , One or more brake shoe
manner as to project inwardly. Each stud is of
elliptical cross section, as shown, and provided at
10 '7
Theadvantages of the invention will be readily’
understood by those skilled in the art to which
it belongs. For instance, it will be observed that
by moving the brake shoes in radial paths the
braking power is uniformly applied by all of 60
them, and a maximum of‘ braking e?iciency is ing provided with means. so .constructedgand ar-'
obtained because the full braking surfaces of all ranged that the sleeve is free to move transof the shoes is simultaneously applied. It will versely of the stud in' a radial direction with re
“ '
also be observed i that ,a- very, simple vvform of spect to the brake drum but is held against rota
5 braking ' mechanismlis provided, the vs'airie being tion during such movement, brake shoeshaving 6'
made up of few parts so'arrange'd‘ithat they ‘are portions‘ between their ‘ends mounted on said
readily accessible, whereby repairs and replace-v sleeves, and means for moving'the sleeves trans-.7 ’
ments, when required, may be made quickly and" versely of said studs.
without dif?culty. A very important advantage; i;
Albrake of the character described, compris
10 is the great power'and brakinge?iciericy that ing, a supporting plate, a brake drum operable 10
may be applied to the brake 'drum?bygthe' use of {adjacent theretqfelliptical anchor studs secured
the eccentric and the described intermediate ‘con;
to said"plate','"'sleeves mounted von said studs,
nections between said eccentrioland-the hrakei'. each sleeve having anielliptical borercomplemen
shoes. 7'
talbto, itsi stud but with its larger diameter
Having thus explained the nature ofjithei" ‘greater than the corresponding diameter of the 15 V
vention and; described » an operative‘, manner, of,
' constructing andvus'ing the .s.ame,.although'withe
' out .attemptingto setlforthall- of the, formslin
which it may be made, or all of the forms of its
2Q; use,
1. what
‘A1 brake
is claimedist+
of the characterH described
.a? _._~-:.‘ s compris-j
ing a'supporting plate, ia-;_brake.,.drum operable.
adjacent thereto,,,anch0r studsj,-secured- to said
plate at diametrically opposite positions, sleeves
2Q gmounte'd on saidstuds, saidsleeves and'said studs
being so relativelyoonstructed andarranged that
the sleeves are ,free to‘ slide transversely of the
studs and radially with ‘respect. tosaiddruimbut
are ‘held, againstrelative rotatiom, brake shoes
30 .mounted on 'said sleeves‘ andnhavingi braking
surfaces so positioned: as to be .engageable with
vthe brake drum, and means foreifecting sliding
movement of said “sleeves ‘and the braketshoes
' carried
2. A brake.
"1'. characteridescribed.‘
L». I.
.,-_ compris
ing a-supporting plate, a brake.‘ drum operable
adjacent thereto‘,- a‘nchorizs‘tuds .' of elliptical cross.
stud;»brake shoes veach havingseparatedhub Tpor- -
tionsre'ncircling a sleeve}; operating ‘arm'sl'leaclii'
having a ring-like portion encircling a sleeve; and‘?
means for‘ reciprocating said: arms ' in such man
ner as‘to'impart movementutozthe sleeves tran'si-v2 s
versely'of the studs. ,
{111. r, it i ‘Till
a 6.‘ A brake. of the characteridescribed comprisil
ing agsupporting plate, a brakeidrum'operable» '
adjacent thereto, studs of ‘elliptical cross *sectior'i-i‘v _
secured to said ~plate,:slejeves ‘of ‘cylindrical forinj-zg'ji
provided .with‘ elliptical .i bores '-complemental \lto' "
said. .studs, the larger. diameters of isaidrbores?
being 'largerthan'jthe corresponding'diameter's, of! .
the studs, so that-the sleeves will} move transf-i '
versely. of the studs without rotating,lbrake’shoe_s<mil
carried by said sleeves, anioperatingamemberlproe'
.videdwith Ya'sha'ft- portion rotatively mounted ‘
said-plate and also provideiwithia'ca'mip‘oi'tio ,
and brakearmshaving ring-‘likeliend partionsf
encircling 'the: cam ' portion ' ifandll'eafch Yhaving' ‘ask-"i1, '
another ring-like vportion encircling a'slee‘ve’;
7. A. brake of‘ thelcharacter-described‘compri“
section secured to said. plate at diametrically §op—; ing a supportin'gplate, a..-brak_e;drum operable '
. posite positions,...sleeves ‘having . elliptical bores
49‘; movably engaging said studs,¢the larger diameters .
adjacent , thereto, i elliptical ? anchor studs‘? pro~ _' '
cal sleeves
the inneri‘fac'e
on theres'pective'studs';
ofs‘aid plate,~cylindri-'
of said bores.being.-greater;than the correspond- - jectingt
ing diameters of .~said;§studs, sothat the. sleeves ; sleevemhaving an elliptical -bore_"cdmplem'errtalitm'
are movable transverselyof the studs and radially. the‘ stud but ‘with its greater'diameterilargerthan":
with respect . to said» drum, but.;are prevented..
the corresponding ‘diameter? <01? the» stud;1 were"
4.5:-from rotating thereon,v brake lshoeshaving por-; shoes mounted on» the‘respectivey'sléevea3iopefat
tions between their ends mounted von-said sleeves,
and means‘ for moving‘ the sleeves transversely of having
ing .arms
.a ring-like
for the
.end emimnngg
the sleeves‘,
. 3. A brake of thelcharacter described, compris-l
arms-infsuch manner’ as toiimp‘ar't'movemen to"
5-91‘ing a supporting, plate';-ia:brake;drum operable ' the‘sleeves transversely of the? ‘studs?-y " I ‘
adjacent thereto, anchorstuds. secured : to said.
8.1A"brake of the‘icharacterZdescribed compri
plate at diametrically; opposite. positions; sleeves, ing a supporting-plate,- a- brake'drun?operab
mounted on saidrstuds;saidsleeves and studs vbe
ing providedwith means. so'constructed and ar
55 ranged that the sleeves are freeLto .move‘trans
adjacent ‘thereto, studs-of elliptical =eross ‘sectio
each having-one endTsecuredTto/said plate ~inlsucl'iv
manner as-to "project-[from a face thereof; ‘eye
versely of the studsand-radially‘ with respect to dr‘ical ‘sleeves erig'a'gingjsaidiistuds} eac?‘slee‘ve;
said drum, but are held against rotation with re--~ havingian elliptical b'o're complement: to ‘its'stud
spect thereto, brake» shoes; mounted :on said butv with its ‘greater diamete'r'iiflonger" than the‘:
sleeves, an eccentric rotativelylmounted on said " corresponding diameter °f“thét:Stud§"so manna-"6 ' ‘
is rreeto'mpve
‘lfi'the stud
but ‘
said sleeves in such manner that rotation'oif the is
- plate, and means. connecting said ‘eccentric- and
eccentric imparts movement to the sleeves trans
verselyof the studs. f
:> v
i4i~ -] ‘
v4. A'brake' of thelcharacter deseribedicdmpris
“ing a supporting plate, Jal‘brajkeldrum; operable
adjacent thereto, ' anchor studs‘ each having
each arm-having airing-like portion ‘atio'n'e' end '1
encircling a sleeve, andlia ,ring-like'portioh 'at'th'e?' ,
other end, an eccentric:rotativelysupported by‘ ' a
said’, plate and l‘iavi'ng'v a cam portion‘ engaged"?
by the last mentioned =en'ds'?o'f said‘arms,‘‘meansi
threaded ‘portions at ‘one end extended through for
preventing - movement of‘ fsai arms longitudie;
said plate at diametrically ‘opposite positions," nally with respect to saidisftu and’; means-‘1201+?
nuts engaging- said » threaded e-portions '_ in ~> such;
70 manner as to anchor the ‘studs to the plate-‘sleeves preventing movement of said arms-longitudin 1e70, _ ,
mounted on saidfistudsgeach sleevetand-stud be-v
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