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Патент USA US2111321

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March 15, 1938.
2,111,321
R. A. GoEPr-'RICH
BRAKE
Filed DeC. 3l, 1936
82
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ATTORNEY
- Patented Mar. l5, 1938
2,111,321
PATENT OFFICE
UNITED STATES
„11,321
BRAKE
Rudolph A. Goellfrich, South Bend, Ind., assigner
to Bendix Products Gol'pßration, South Bend,
Ind., a corporation o! Indiana
Application December 31, 1936, Serial No. 118.459
IClnim. (UL 18S-79.5)
This invention relates to brakes, and is illus
The converging wedge faces of the plungers
trated as embodied in an internal expanding
brake for an automobile.
94 engage between them a hardened ball Il in
rolling thrust engagement in the embodiment of
Figures 1 and 2, with a head IIB which is car
ried by an operating stem |02 threaded into the
side wall of the bracket 9B, so that its end may
be grasped by a wrench outside the brake. The
axis of the stem Il! is at right angles to the
axis of the plungers Sl. The opening in brac
ket 96 through which the operating member 10
Mii-_|02 is Introduced may be closed by a suit
able stamping |04.
'I‘he embodiment of Figure 2 din’ers from that
of Figure 1 in that the axis of member Ill-_Ilz
is at one side of the position of ball Il when the 15
brake is new, the bracket |96 being formed ac
cordingly. This is to take care of the well-known
An object Vof the invention is to provide a sim
ple and rugged shiftable device connecting the
brake shoes, and which is adjustable to spread
the shoes apart to compensate for wear of the
brake lining. In one desirable arrangement this
device includes plungers engaging the shoes and
10 formed with converging faces between which a
ball is crowded to wedge the shoes apart. The
ball has rolling engagement with a head or the
like on a member which is operable to make
the desired adjustments.
The above and other objects and features of
15
the invention, including various novel combi
nations of parts and desirable particular arrange~
ments, will be apparent from the following de
fact that, especially in brakes for automobiles,
scription of the illustrative embodiments shown the lining of the shoe which does the greater
in the accompanying drawing, in which:
' work in forward braking wears faster than the
lining of the other shoe.
Figures 1, 2 and'3 are sections through dif
ferent i'orms of adjusting and connecting de-‘
In both embodiments. the stem III can be
vices, and which illustrate different embodiments turned to crowd the ball il between the con
vergingsurfaces on the plungersßmowedgethe
of my invention; and
.
_
Figure 4 is a partial section through the third shoes apart.
embodiment, on the line l--l of Figure 3.
InFigures3and4,inadditiontoaœip-shaped
‘
The novel adjusting and connecting devices
guide stamping III cut away to embrace the
plungers Il, the head III of siem Il! is formed
with radial rounded ribs yieldingly interlocking
(under the pull of the brake return springs ccn
necting the shoes) with
grooves
in a non-circular member 2l! which provides
are illustrated as embodied in a brake such as
is described and illustrated in Patent No. 2,045,
-010, _granted Bendix Aviation Corporation on
June 23, 1936, on an application ñled by me onDecember l, 1932. The present invention may
be regarded as an improvement on the brake
shown in that patent, although some of its ad
vantages are obtainable in brakes of other types.
onitsotherfaceaplanesm'facewhichßm
gaged by the ball Il. This forms a convenient
means for yieldingly locking the adjustment.
While several embodiments have been de 35
scribed in detail, it is 'not my intention to limit
’Where the parts arethesame. orare analogous
in function. the same _reference characters are
used herein as in said patent.
theacopeottheinventiontotbœeparticular
embodimenuorotherwisethanbytbetermaof
-
As explained in detail in said Patent No. 2,045,
010, the brake illustrated includes a drum Il, at
the appended claim.
theopensideofwhichisasupportsuchasa
backing plate 26, andwithin which are arranged
I
I claim:
A brame having shoes provided with a mutable
>` connectionlncludingapairof endwiae-monble
.stopmandsteadyrestaasdeacribedinsaid pat
theplungershaving converainaweœei'aces, a
ballennainaaaid fweaandathrmtmember
mountedintheatatknarymemberandadiust
ableinadirectionparallelingthebrakeaxiaand
withwhichtheballhasrollingeontactandwhich
isoperabletotorœtbeballbetweenaaldfœes
towedgetheplungexsaparttoadiustthemoes
tornar.
RUMIPHLGOUI'RICH.
.E
55
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