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Патент USA US2118188

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' May 24, 1938.
D. l.. GALLUF»` -
- 2,118,188
BRAKE
Filed 'Maioh so, 193s
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2,118,188A
Patented May 24, 1938
UNITED sfngrEsA PA'rENr :OFFICE
2,118,188
BRAKE
Davia L Gallus, south Bend, me., assigner t@
Bendix Products Corporation, South Bend, Ind.,
a corporation or Indiana
Application March 30, 1936, Seriali No. 7h59@
i12 malins. (Cil. 18S-152)
The illustrated brake comprises a rotatable
drum iii, at the open side of which is arranged
This invention relates to brakes, and is illus
trated as embodied in an internal expanding
a support such as a backing plate l2, and within
which is arranged the brake friction means.- This
is shown as including two approximately semi- o
circular shoes, each of which may be formed oi
a i'lat stifîening web it welded to the inner face
of a. rim i@ faced with the usual lining iti.
The shoes are preferably connectedv at the bot
torn of the brake by an adjustment it against i0
which the shoes are held by a tensioned spring
22. The shoes are also provided with the usual
return springs, steady rests, etc., which are not
`braise for an automobile wheei.
An object of the invention is to provide a com
5 pact and rugged structure in which the» servo
or self-applying action of thejshoes is minimized
by a novel arrangementI permitting anchorage
immediately adjacent the brake drum instead oi
some distance radially inward from the drum.
l0 As one eiîective means of doing this, I form the
connected shoes of the brake with rims which
project beyond or overhang the ends of the
stiñening webs of the shoes, and provide means
stationarily'mounted on the brake backing plate
1v and directly engaged by the ends oi the shoe
rims and taking the braking torque in the man
ner of a brake anchor. I prefer to reinforce the
' overhanging ends of the rims, for example by
welding plates to their lower faces.
2@
The above-described anchoring means prefer
ably forms part of an .applying device carried
by the backing plate between the shoe ends, and
specifically shown herein.
`
At the upper end of the brake, the rims it over- l5
hang and project beyond the ends of the webs
it, and seat in anchoring engagement in corre
sponding notches in a part or anchor 2t embraced
between them. The part 2dv is shown as an in
tegral extension of a cylinder 26 secured station- 20
arily to the backing plate l2, and containing
suitable pistons -or the like acting through thrust
members 28 slotted to embrace the ends of the
shoe webs i6.
It will be seen that this novel arrangement 25
25 hydraulic type, the cylinder being mounted on
the backing plate and provided with a. part en- . brings the'anchorage as close to the drum, i. e.
gaged by the shoe rims and serving as the brake radially outward as far, as is physically possible,
anchor. The pistons arranged in the cylinder, thereby minimizing the servo or self-applying>
action of the brake and making its action more
or their equivalents, may have thrust parts em
3@ bracing or otherwise engaging the ends of the constant.
I prefer to reinforce the anchoring ends of
shoe webs.
.
When the novel brake herein described is used the rims I6 by means such as relatively heavy
on the rear wheels, I prefer to provide auxiliary plates 30, slotted to fit over the ends oi the webs
mechanical applying means for actuation by the I4, and fitting against and spot-welded to the
35 emergency brake lever. Preferably this is in the inner faces of the rims I6 at their anchoring ends. 35
Where the above-described brake is used on
form of a linkage just inside the cylinder, engag
the rear wheels, it is often desirable to supply a
»ing the shoe webs adjacent the ends of the cyl
inder. . The linkage is arranged for actuation by mechanically-operable linkage or other device
means outside the brake; for example it may which can be connected to the emergency lever
40' have a lever fulcrumed on and extending through of the car. In the arrangement of Figures 1-3, 40
shown as acting on the ends of the webs of the
shoes. The applying device illustrated is of the
the backing plate of the brake.
'
.
^
The above and other objects and features of
the invention, including various novel combina
tions of parts and desirable particular construc
45 tions, will be apparent from the following de
_ scription of the illustrative embodiment shown
in the accompanying drawing, in which:
Figure 1 is a vertical 4section through the brake,
this linkage comprises two links 3_2 and 3l, slotted
at their outer ends pivotally to embrace the webs
Il, and arranged just inside the‘ cylinder 26, for
movement in a horizontal plane.
_
The links 32 and 34 are pivoted to an operating 45
lever 36 _arranged perpendicular to the backing
plate and extending through an opening `in the
backing plate and formed and arranged at its
. just inside the head of the brake drum, and outer end for actuation by a cable or thelike
_ forming part of a system o_f operating connec- 50
5o showing the shoes in side elevation;
_
Figures 2 and 3 are partial sections respectively
on the lines 2-2 and 3_3 of _Figure 1; and
_
Figure »4 is a partial construction correspond
ing to Figure .2, but _showing a modiñed con
55 struction.
‘
tions operated by the emergency lever.
The lever 36 is shown as having mounted there
on a resilient leaf spring 3B holding a stamping
40 also mounted on the lever and yieldingly and
siidably held against the backing plate and form- 65
2
’
2,118,188
ing a seal for the opening through which the
cylinder stationarily secured to the backing plate
lever passes. 'I'he end of link 32`slidably en
gages the inner face of the backing plate, and
forms a movable fulcrum for the linkage.
The modiñcation of Figure 4 is the same as
the one described above, except that the lever
|36, corresponding to lever 36, has one end round
engaged by the ends of said rims and taking the
anchoring torque directly from one or the other
of said rims.
6. A brake comprising a backing plate having
ed and seated in a slot in one of the webs i4, for
direct thrust engagement with the correspond
10
ing shoe, the connection tov the other shoe being
through a link |32 slidably engaging the backing
and provided with a part on said applying device
mounted thereon a pair of connected shoes
formed with rims and with stiffening webs ter
minating short of the ends of the rims at the
unconnected ends of the shoes, said rims being 10
provided with strengthening means at said un
plate at one end and slotted to embrace the other connected ends, and a hydraulic applying device
web I4 at the otherend.
» mounted on the backing plate between said un
The webs I4 may be notched to embrace the connected ends and including a cylinder station
15 ends of the links 32, 34 and |32, to hold them
arily secured to the backing plate and provided
in place.
with a part engaged by the ends of said rims and
taking the anchoring torque directly from one
While illustrative constructions have been de
scribed in detail, it is not my intention to limit or the other of said rims.
'7. A brake comprising a backing plate having
the scope of the invention to those particular
20 constructions, or otherwise than by the terms of mounted thereon a pair of connected shoes
the appended claims.
formed with rims and with stiffening webs ter
I claim:
I
minating short of the ends of the rims at the
1. A brake comprising a backing plate having unconnected ends of the shoes, and a hydraulic
mounted thereon a pair of connected shoes formed applying device mounted on the backing plate
between said unconnected ends and including a
25 with rims and with stiiïening webs terminat
ing short of the ends of the rims at the uncon-- cylinder stationarily secured to the backing plate
nected ends of the shoes, and means stationarily and provided with a part engaged by the ends of
said rims and taking the anchoring torque di
mounted on the backing plate between said un
connected ends and engaged by the ends of said rectly from one or the other of said rims, said
30 rims and taking the anchoring torque directly cylinder containing hydraulically-operated means
from one or the other of said rims, said means having parts engaging the ends of the shoe webs.
8. A brake comprising a backing plate having
positioning the anchored rimor rims radially.
2. A brake comprising a backing plate having mounted thereon a pair of connected shoes
mounted thereon a pair _of connected shoes formed with rims and with sti?fening webs ter
minating short of the ends of the rims at the
35 formed with rims and with stiiiening webs ter
unconnected ends of the shoes, and a hydraulic
minating short of the -ends of the rims at the un
applying device mounted on the backing plate
connected ends of the shoes, said rims being pro
between said unconnected ends and including a
vided with strengthening means at said uncon
40
15
20
25
30
.
nected ends, and means stationarily mounted on
cylinder stationarily secured to the backing plate
the backing plate between said unconnected ends
and engaged by the ends of said rims and taking
and provided with a part engaged by the ends of 40
said rims and taking the anchoring torque di
the anchoring torque directly from one or the
other of said rims, said means positioning the
anchored rim or rims radially.
3. A brake comprising a backing plate having
mounted thereon a pair of connected shoes
formed with rims and with stiffening webs ter
minating short of the ends of the rims at the
unconnected ends of the shoes, and an applying
50 device mounted on the backing plate between.
said unconnected ends and including a part on
said applying device stationarily secured to the
backing plate and engaged by the ends of said
rims and taking the anchoring torque directly
55 from one or the other of said rims.
4. A brake comprising a backing plate having
mounted thereon a pair of connected shoes
formed with rims and with stiiîening webs ter
minating short of the ends of the rims at the
60 unconnected ends of the shoes, said rims being
provided with strengthening means at said un
connected ends, and an applying device mounted
on the backing plate between said unconnected
ends and including a part on said applying de
65 vice stationarily secured to the backing plate and
engaged by the ends of said rims and taking the
anchoring torque directly from one or the other
of said rims.
rectly from one or the other of said rims, said
cylinder containing hydraulically-operated means
having thrust members slotted to embrace the
ends of the shoe webs.
45
9. A brake comprising a backing plate having
mounted thereon a pair of connected shoes
formed with rims and with stii’fening webs ter
minating short of the ends of the rims at the
unconnected ends of the shoes, and a hydraulic 50
applying device mounted on the backing plate
between said unconnected ends and including a
cylinder stationarily secured to the backing plate
and provided with a part engaged by the ends of
said rims and taking the anchoring torque direct
55
ly from one or the other of said rims and locating
the anchored rim or rims radially, in combination
with a mechanical applying linkage arranged on
the side of the cylinder toward the centerof the
brake and operatively engaging the webs of the 60
shoes adjacent opposite ends of the cylinder.
10. A brake comprising a backing plate having
mounted thereon a pair of connected shoes
formed with rims and with stiiïening webs ter
minating short of the ends of the rims at the 65
unconnected ends of the shoes, and a hydraulic
applying device mounted on the backing plate
between said unconnected ends and including a
5. A brake comprising a backing plate having 4cylinder stationarily secured to the backing plate
mounted thereon a pair of connected shoes
formed with rims and with stiifening webs ter
minating short of the ends of the rims at the
unconnected ends of the shoes, and a hydraulic
applying device mounted om the backing plate
75 between said unconnected ends and including a
and provided with a part engaged by the ends of 70
said rims and taking the anchoring torque direct
ly from one or the other of said rims and locat
ing the anchored'rim or rims radially, in com
bination with a mechanical applying linkage ar
ranged on the side of the cylinder toward the 75
3
2,118,188
center of the brake and operatively engaging
the webs of the shoes adjacent opposite ends ofthe cylinder, said linkage including an operating
lever generally perpendicular to the backing plate
and extending 'through the backing plate and
operable from outside the backing plate.11. A brake comprising a backing plate having
mounted thereon a pair of connected shoes
formed with rims and with stiilening webs ter-_
minating short of the ends of the rims at the
unconnected ends of the shoes, and a hydraulic
applying device mounted on the backing plate be
tween said unconnected ends and including a
cylinder stationarily secured to the backing plate
and provided with a part engaged by the ends of
said rims and taking the anchoring torque direct
ly from one or the other of said rims, in com
blnationl with a mechanical applying linkage ar.
ranged on the side of the cylinder toward the
12. A brake comprising a backing plate having
mounted thereon a pair of connected shoes
formed with rims and with stiffening webs ter
minating short of the ends of the rims at the
v unconnected ends of the shoes, and a hydraulic
applying device mounted on the backing plate .
between said unconnected ends and including a
cylinder stationarily secured to the backing plate
and provided with a part engaged by the ends of
said rims and taking the anchoring torque direct 10
ly from one or the other of said rims, in com
bination with a mechanical applying linkage ar
ranged on the side of the cylinder toward'the
center of the brake and operatively engaging'the
webs of the shoes adjacent opposite ends of the 15
cylinder, said linkage including an operating lever
generally perpendicular to th'e. backing plate and
extending through the backing plate and oper
able from outside the backing plate.
20 center of the brake and operatively engaging the
webs- of the shoes adjacent opposite ends of the
cylinder.
DAvm L. GALLUP. _
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