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Патент USA US2403512

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July' 9, 1946;
N. FLESCH
2,4o3,512_ '
SLACK ADJUSTER
Filed Jan. 21, 1944
124 122 _¢@_ 110
406' dOLL
£20 140
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INVENTOR.
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2,403,512
Patented July 9, 1,946
UNITED STATES PATENT OFFICE
SLACK ADJUSTER
Norman Flesch, Chicago, 111., assignor to Ameri
can Steel Foundries, Chicago, 111., a corpora
tion of New Jersey
Application January 21, 1944, Serial No. 519,227
9 Claims. (01. 287_——61)
‘
1
more particularly to a slack adjuster for a pull
rod such as is commonly utilized in railway brake ,
rigging.
An object of my invention is to design a two
piece pull rod, one piece of which comprises a
slack adjuster body with a rotatable adjusting
member mounted therein, the other piece of said
opening 12, within which the adjusting member
14 rotates.
rod being formed with a threaded portion in com
plementary threaded engagement with the ad
2
tegral ?ange or shoulder 16 in complementary
engagement with a shoulder I8 formed within the‘
body 10. A collar 20 is shrunk on the adjusting
member 14 and bears as at 22 against the body,
thus maintaining the member 14 in normal as
sembled relationship therewithin. An Alemite
?tting 24 provides means for lubricating the body
My invention relates to slack adjusters and
10
justing member.
The member 2 of the pull rod comprises the
threaded extremity 26 in complementary
threaded engagement as at 28 with the rotatable
Another object of my invention is to design a
adjusting member 14, within which the threaded
slack adjuster device of the above described type
portion 26 is received, the inner extremity of the
in which the adjusting member comprises a hous
ing for the reception of the threaded extremity 15 member 14 within the body 10 affording a hous
ing 33 for the reception of the extremity of the
of the associated pullrod piece, said housing af
threaded portion 26; and it will be understood
fording a convenient receptacle for lubricant, if
thatysaid housing 30 may afford a convenient re
desired.
ceptacle, if desired, for any suitable lubricant,
Still another object of my invention is to pro
vide means for yieldingly resisting rotation of the 20 such as grease, for the extremity of the threaded
portion 26.
adjusting member, thus preventing accidental
in the pull rod under service conditions.
In the drawing:
_
'
The outer end of the adjusting member 14 is
provided with a wrench-engaging, nut-like/por
rotation thereof, as a result of vibrations set up
- tion 32 affording means for engagement with an
Figure 1 is a side elevation of one embodiment 25 associated actuating member, such as a wrench,
by means of which the adjusting member l4 may
of my novel slack adjuster pull rod, portions of
be rotated in order to lengthen or shorten the
the structure being broken away in order to
pull rod as desired.
Accidental rotation of the adjusting member
Figure 2 is a bottom plan view of the device
shown in Figure l with a portion thereof broken 30 14 is prevented by means of a pair of ball ele
clarify the illustration.
ments 34, 34, (Figure 2), eachbeing mounted
away.
within a housing 36 in the slack adjuster body
10 and being urged by means of a spring 38 into
indicated by the line 3—3 of Figure l. '
I
engagement with the adjacent surface of the
Figures 4 to 6 inclusive illustrate a modi?cation
of my invention, Figure 4 being a side elevation 35 shrink collar 20, which is provided with a pair
of complementary recesses adapted for the re
with portions of the structure broken away,
ception of the respective balls 34, 34 when regis
Figure 5 being a bottom plan view with a portion
tered therewith. It will be understood that when
of the structure broken away, and Figure 6 being
the balls 34, 34 are received within the associated
a sectional view taken in the plane indicated by
40 recesses in the collar 20, they are operable to re
the line 6-6 of Figure 4.
strain the adjusting member 14 against rotation,
Describing my invention in detail and referring
thus
preventing accidental rotation thereof due
?rst to the embodiment thereof illustrated in
to vibrations such as may be set up in the pull
Figures 1 to 3 inclusive, my novel slack adjuster
rod under service conditions. However, when it
pull rod comprises two pull rod members or
pieces 2 and 4, each comprising a jaw B with a 45 is desired to rotate the adjusting member 14, su?i
cient force may be'applied with a wrench to the
pin hole opening 8 therethrough, said opening
nut-like portion 32 of the member 14, whereby
being formed and arranged for the reception of
the balls 34, 34 are urged inwardly into the hous
a brake pin, affording securement for an asso
ings 36, 35 against the resistance of the springs
ciated element, such as a brake lever, within the
Figure 3 is a sectional View taken in the plane
jaw 6.
The member 4 is formed with a slack adjuster
body 10 having an opening 12 (Figure 1) at one
end thereof for the reception of a rotatable ad
justing member 14, said adjusting member being
50
38,33.
Referring now to the modi?cation illustrated in
Figures 4 to 6 inclusive, the slack adjuster device
comprises the pull rod members or pieces I02
and 104, the member 104 comprising the slack
in the form of a sleeve 0r collar having an in 55 adjuster body 106 formed in part by the spaced
2,403,512
3
4
top and bottom straps H18 and H0. The body
I06 comprises the opening H2, within which is
mounted the rotatable adjusting member H4,
4. In a slack adjuster pull rod, a pull rod mem
ber comprising an integral jaw at one end there
which is in threaded engagement as at H6 with
the threaded portion I [8 of the pull rod piece I02,
of, an adjusting member rotatable within said
body, said adjusting member comprising a
the extremity of the threaded portion H8 being
received withinthe housing I20 formed within
the adjusting member I14.
,
'
The inner extremity of the adjusting member
H4 in the body I98 is provided with a wrench
engaging or nut portion I22 for engagement with
an associated actuating member such as a wrench,
and in this connection it may be noted that each
of and an integral body at the opposite end there
wrench-engaging portion, means _ for yieldingly
resisting rotation of said adjusting member, and
another pull rod member comprising an integral
jaw at one end thereof and a threaded portion
"at the opposite end thereof sleeved within said
_ adjusting member in threaded engagement there
with, said adjusting member comprising a hous
ing for the reception of the extremity of said
of the top and bottom straps IE8 and Hi] is
threaded portion.
beveled at £24, I24 to afford clearance for the 15
'5.-In a slack adjuster device, a two-piece pull
wrench.
rod, 2. body on one of said pieces, a sleeve rotat
It will be understood that the embodiment il- ‘
able within said body, a threaded portion on
lustrated in Figures 4 to 6 inclusive is substanthe other of said pieces received within said sleeve
tially identical with that shown in Figures 1 to 3,
in threaded engagement therewith, said sleeve
except for the fact that the nut portion I22 oi
comprising a housing within said body completely
the adjusting portion 1 iii is disposed at the ‘inner
enclosing the associated extremity of said
extremity thereof within the body m6.
threaded portion, and a wrench-engaging por
It is to be understood that I do not wish to be
tion formed on said sleeve within said body.
limited by the exact embodiments of the device
6.71m a slack adjuster pull rod, a pull rod mem
shown which are merely by way of illustration 25 ber comprising connecting means at one end
and not limitation as various and other forms of
thereof and an integral body at the opposite end
the device will, of course, be apparent to those
thereof,
an. adjusting member rotatable within
skilled in the art without departing from the
said body, said adjusting member comprising a
spirit of the invention or the scope of the claims.
wrench-engaging portion disposed externally oi’
I claim:
,
30 said body, means i'or yieldingly resisting rotation
i. In a slack adjuster, a two-piece pull rod, the
of said adjusting member, and another pull rod
respective pieces of which are provided with con
,inember comprising connecting means at one
necting means on their remote extremities, a body
end thereof and a threaded portion at the oppo
carried by one of said pieces, a collar rotatably
site end thereof sleeved within said adjusting
mounted in said body, and a threaded portion
member in threaded engagementtherewith, said
on the other of said pieces in threaded engage
adjusting member comprising a housing within
ment with said collar, said collar comprising a
said body for the reception of the extremity of
housing within said body completely encasing the
said threaded portion.
.
extremity of said portion.
fl.
In
a
slack
adjuster
device,
a
two-piece
pull
2. In a slack adjuster pull rod, a pull rod mem
,rod, a body on one of said pieces, a sleeve rotat
ber comprising an integral jaw at one end there
able Within said body, a threaded portion on the
of and an integral body at the opposite endrthere
other or said pieces received within said sleeve
of, an adjusting member rotatable within said
in threaded engagement therewith, said sleeve
body, said adjusting member comprising a
wrench~engaging portion at the inner end there 45 comprising a housing within said body completely
encasing the associated extremity of said thread
of, a collar on said adjusting member rotatable
ed portion, and means on said sleeve for rotating
therewith, said collar comprising a recess, a
the same.
spring-pressed ball element mounted in said body
8. In a slack adjuster device, a two-piece pull
and adapted for reception within said recess for
rod, 2. body on one of saidrpieces, a sleeve rotat
yieldingly resisting rotation of said adjusting
able within said body, a threaded portion on the
member and collar, and another pull rod member
other of said pieces received within said sleeve
comprising an integral jaw at one end thereof,
in threaded engagement therewith, said sleeve
and a threaded portion at the opposite end there
comprising a housing internally of said body
of housed within said adjusting member in
completely encasing the associated extremity of
threaded engagement therewith.
said threaded portion, and a wrench-engaging
3. In a slack adjuster pull rod, a pull rod mem
portion formed on said sleeve externally of said
ber comprising connecting means at one end
body,
.
‘
thereof, an integral body at the opposite end
9. In a slack adjuster, a two-piece pull rod, the
thereof, an adjusting member rotatable within
said body, said adjusting member comprising a 60 respective pieces of which'are provided with con
necting means for associated parts, adjusting
wrench-engaging portion within said body, means
means carried by one of said pieces comprising a
for yieldingly resisting rotation of said adjusting
pair or" relatively rotatable members, one of said
member, and another pull rod member compris»
members being sleeved within the other and pre
ing' connecting means at one end thereof and
senting a housing therewithin, and a threaded
a threaded portion at the opposite end thereof
element on the other piece sleeved within said
sleeved within said adjusting member in threaded
one member and in threaded engagement there
engagement therewith, said adjusting member
comprising a housing within said body adapted
with, one extremity of said element being adapted
for the reception of the extremity of said threaded
to be encased within said housing.
portion.
.
NORMAN FLESCH.
70
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