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Патент USA US2577323

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Dec. 4, 1951
'
2,577,319
RF FEITL
RETAINING RING
Filed Oct. 11, 1948
2 SHEETS——SHEET 1
RUDOLF
F
ATTOR N EY
Dec. 4, 1951
R. FEITL -
2,577,319
RETAINING RING
Filed Oct. ll, 1948
FIG.
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3
2 SHEETS—SHEET 2
;
,FIG. 4
RUDOLF 'FEITL ,
ATTORNEY "
Patented Dec. 4, 1951
2,577,319
- UNITED- STATES PATENT OFFICE ’
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imaclt'rcitl, Brooklyn, N. Y., assignorto waists
Ko‘hi'noor; 1116.; Long Island ‘ City,
: notation of New York
Application Octolier‘ ‘11, 1948‘, Serial No. ‘53,844
6 Claims; (Cl. SEQ-36')
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the'lri'ng' body‘, and in which the ring body'is'i
especially designed to counteract the tendency
of the~~ prongs to snap past" center‘ when" the;
‘This invention relates to ~ improvements in re~‘
taming rings,‘ and moreparticuiarly to» improved
external retaining rings of the so-called- sel'f'e
locking type.
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shoulderformedby the ring is" subjected to heavy"
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The conventionalretainiii-g ring usuall'y' con~ 51
thrusts.
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A further‘ object of the'inve'ntion'isto provide
a‘ self-locking‘v retaining ring characterized by.
Si‘StS‘Oif an openeendediannulus' which is adapted
tobesprung' into a seating; groove provided in a
shaft-or housing hore'and has su?icient radial‘
equi-latéral- triangular shape and having‘ locking"
prongs formed in the angle portions of the ring
body arranged so that their center lines coincide
depth as to‘form an arti?cial‘slioulder capable
oil-securing a machine part against airiai dis
with the lines bisecting said angles,‘ whereby the
prongs are symmetrically- disposed and any two;
placement oil-the shaft or
the housing ‘bore:
For certain retaining‘ri'n'g assemblies in'which'it
is necessary or desirableto dispense with a‘ seate
irig groove, it is well known to'employ retaining
prongs are interconnected by the-side edge pon
tions of 'the'ring body which‘extend as straight
rings of" the "so-called selfelocking _ type; such‘ 151
arms between'prongs;
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Still another‘ object oi‘v the‘ invention is to‘
provide an improved self-locking r‘etainirisljfing"
usually consisting of a. closed‘ annulus provided
along its shaft or housing bore edge witlijradially
protruding locking tongues'which engage on the‘
having atriangul‘ar ring body. and locking‘ prongs
formed in the ‘angle portions thereof as afore
shaft or boresurface. These lockingtongues
said, in which the‘ securing edges‘ of the prongs tie
on a circle having slightly smaller radius than
the radius of the‘ shaft circle‘, whereby‘ when such
a ring is slipped over'and shiftedalong the shaft
are inclined to thepla'ne of'the ring‘ body in 'di'~'
rection as - to give way when the ring is ase
sembled; as by shifting it over the shaft or'i'nto
the housing bore, but to- frictionally secure them
selves to and. lock with the shaft‘unde'r thrust
load-exerted in the opposite direction. so thatch
in direction to increase the inclination of ‘the
der thrust load the holding power of'the ring is
prongs‘are‘ capablegofv?eiring so asto assist the
prongs to readily ?nd their proper inclination,
and‘ when thering is subjected to thrust load‘, in
increased.
prongs-the ring Body‘ portions connecting the.
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_ Self-locking rings of this type. although ,very
e?‘lcierit under small thrust‘ loads, are onento
the" objection that-‘the locking tongues, when
semblies',‘
subjected tend‘to
to heavysnap
thrusts
“pa-stoccurring
center" with-respect
in some
to the plane‘ ofthe ring Body to'a' position of op:
posite inclination in which they‘ lack holding
the opposite direction, the connecting‘ arms are
'1 put under tension, which not only counteracts the
tendency’ of the prongs to snap to answer-center
or ?O?e-holdir'ig'v pdsitio?g b'llit' also causes Saldl
prongs to increase their holding power. on the
power. Considering speci?cally the case of the
prior external self-locking". rings of conventional’
construction, namely", a ring adapted for use on
ai'jsha-ft,‘ such a. ring is provided with several‘
spaced ‘gt‘onglues or prongs protruding inwardly‘
fi'omthe inner circumference of the circular ring
body“ in more or less isolated fashion. These
isolated tongues ‘act independently of one another
and of'the ring body as well, and vthus have only
limited‘ elastic stability. Hence, they‘ tend to snap
over center to a position of vopposite inclination
when subjected‘ to heavy thrust loads, whereupon‘
theylose their frictional grioont'he shaft-‘as
aforesaid.v
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Itris an object of the present invention to over‘
come the aforesaid disadvantagesof the prior 503
shaft,
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The above and other objects and features-‘oil.
advantage v'of' the. improved self-lock-htg retains
,ingring- will be apparent-from the following dew‘
tailed description thereof,v taken with the‘ accord:
panying drawings illilstrath'lgv several ring-orn
bo‘dimentsr iii which“
Fig.» 1: is a fr'oht'v'iew or a ring according to the
invention assembled on a shaft;
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Fig“. 2" is a section along'line 2‘_‘-2“or Fig‘. 1‘, also
showing the machine part to be'secured‘ ‘bythe
ring;
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‘ F'igJB‘is- a. front view of the improved ring in
its free‘ state‘, i‘. e. Before assembly‘;
Fig‘. 4 is a section along line 4-4 of Fig. 3‘;
Figs. 5,.and 6' are'vi‘ews similar to Figs. 3' and
4, illustrating a. modi?cation. of the ringshown
self-‘locking retaining rings, through. the pro
vision of animproved- self-‘locking ring char
mthe earlier numbered ?gures;-
acteriz'ed; by locking tongues. or prongs which are‘
effectively a. party of; the ring ,bod-y rather than.
Fig. 7 is-a perspective view of the ring ‘assem
blyv as shown in" Fig.- 1, but’ illustrating the» flex.‘
‘isolated prongs extending from the inner edge oil
ing; actionsot» the-arm's connecting theprongs oc-g
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£3,577,319
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curing when the ring is shifted over the shaft in
the direction of the arrows; and
Fig. 8 is a perspective view of a ring according
for use on shafts whose diameter is considerably
larger than that of the circle on which the prong
to the invention, modi?ed to act as an elastic nut.
body itself takes up some of the forces that would
The improved self-locking ring according to
otherwise cause the prongs to bend to an exces
sive inclination as might impair their frictional
edges 22c, 23c, 24c normally lie, since the ring
the invention is generally designated [0, being
shown in Figs. 1 and 2 as assembled on a shaft
II, and serving the purpose of maintaining a
holding power on the shaft.
When a normal thrustrload is exerted on the
ring by the machine part l2, such of course acts
machine part [2 (Fig. 2) against axial displace
ment on the shaft. The illustrated ring is of 10 against the inclination of the prongs, and re
equi-lateral triangular shape rather than of con
sults in the prongs ?xing themselves ?rmly to the
ventional circular form, and thus has three _ shaft. If now the thrust load increases substan
tially, the prongs tend to straighten out, i. e. to
straight arms or bridges I3, l4, 15, which connect '
return to the plane, of the ring body and their
the angles of the ring body, said arms being de
?ned by the straight outer edges I6, ‘l1 and I8 of . it root distance tends to increase. As a conse
the triangular body and inner parallel edges I9,
quence, arms l3, M,v 15 which connect the prongs
and de?ne their root distance tend to straighten
20 and 21, which latter in part de?ne elongated
out and are placed under tension. The arms now
shallow recesses to be later described and which
act as rigid links which resist further increase in
open into the shaft opening with which ‘the tri-,
angular body is provided. Three equi-distantly 20 the root distance of the prongs, so that the prongs
spaced locking prongs 22, 23, 24 are struck’ out of '
?x themselves on the shaft with increased fric
the material of the ring body'angles, said prongs
having side edges de?ned by the slits 22a and 221),
maynoccur with conventional rings. Hence, by
231i and 23b, and 24a and 24b, and free or shaft
proper dimensioning of arms l3, l4 and I5 in re
tion, rather than being snapped over center as
engaging edges 22c, 23c and Me, respectively.» 25 lation to the length and initial inclination of the
The slit lines de?ning the side edges of the
tongues are symmetrical to the lines bisecting the
angles of the triangular ring body, as shown.
,
prongs, they are capable of applying a force in
reaction to heavy thrust loads, which causes the
prongs to more securely engage with and lock the
Extending between the prongs and de?ned sub-é
stantia‘lly by the inner edges [9, 20, '2! of the‘ 30
ring on the shaft.
to its assembled position.
strengthen the ring body against forces tending
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A notable advantage of the improved three
prong ring with long arms or bridges integrally
connecting arms are the aforesaid elongated
connecting the prongs flows from the fact that
smalldepth recesses 25, 26, 21, providing clear-'
ance space for the shaft both during assembly of.
the reaction forces created by the arms on the
prongs equal each other because of the sym
the ring thereon and in ?nal assembly. The,
form and depth of these recesses may be varied 35 metrical three-point engagement of the prongs
from that shown, but in any case they are chosen
with shaft, and that such forces, are maintained
even in installations in which the surface of the,
so that the section of the arms l3, l4 and I5
connecting the prongs is both adequate to with
shaft is not exactly circular or cylindrical.
stand the tension that the arms are required to'
Although following the same general form of
take under the maximum thrust load likely tobe
ring as previously described, the modi?ed'ring il
encountered by the ring, and at the same time
lustrated in Figs. 5 and 6 is formed along its
?exible enough to render the arms yieldable in
equal short sides l6’, H’ and I8’ with right-.
the operation of shifting the ring over the shaft.
angled ?anges 3|, 32. and 33 which serve to.
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The free edges 22c, 23c‘and 240 of the. tongues
to twist it out of its plane, a feature of’merit
may be formed straight but preferably they are 45 where the ring is made of very thin material,_
curved as shown in conformity with the curva-'
as required for small size shafts.
ture of the shaft II and to extend as arcs of a,
In the Fig. 8 .modi?cation, the threevpr-o‘ngs,
circle having diameter which is slightly smaller
of which two designated 34 and 35 are visible,
than the shaft diameter.
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are twisted out of the ring plane so thatvtheir
' Toreduce sharp cornering of the ring body,
free edges lie on a helix, and are thereby‘ adapted
the apices of the angles are cut away. along right
to engage the threads of a bolt having thefsame
lines to the lines bisecting the angles and to a;
helix angle. Such a ring functions'as an elastic
depth such as not to impair the requisite strength
nut and can be more simply installed 'thans'the".
of the ring body. Hence, the outer edge of the
rigid or solid nut which requires the usualr
body de?nes a hexagon having long equal sides
threading-on operation.
I6, ['1 and I8 and short equal sides‘lB', l1‘ and
Without further analysis, it will be appreciated:
18’, the latter corresponding to the right-line
that a retaining ring having a triangular body
formed by cutting off of the apices.v ’
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portion, with prongs struck out from the anglesof
The action of a ring as aforesaid when shifted
the
body and connected by straight flexible arms,
over its shaft in one direction and when exposed 60 as aforesaid, overcomes the hereinbefore noted
to thrust load acting in the opposite direction is
as follows:
disadvantages of the prior self-locking rings
whose locking tongues or prongs are in effect iso-,
As can be seen from Figs. 1, 2 and '7, when the
lated from the ring body and hence are.su?iring is shifted over a shaft H having larger di
ciently unstable that they may ?ex over center,
65
ameter than that of the circle containing the
and lose their holding power on a shaft with
free edges of the prongs, the inclination of the
which they are assembled. Rather, a ring ac
prongs tends to increase, and their root dis
cording
to the present invention takes into ac-.
tance, i. e. the distance of their root lines from
count the tendency of the prongs to move toan
the shaft center tends to decrease. Accordingly,
the side arms 13, I4, l5 of the ring body vwhich
connect the prongs are placed under compression
and tend to flex or bow forwardly out of the plane
inoperative position or non-locking positionrbut
its design is such as not only to‘counteract this
tendency in highly effective manner but‘ alsoto
give increased holdingpower to the ring under’
of the ring body. The ability of the side arms to
?ex as aforesaid makes the ring body extremely
the large thrust loads to which it may be sub-j
yieldable, so that the ring is especially adapted 75 jected.
2,577,819
As many changes could be made in carrying
out the ring construction described without de
parting from the scope of the invention, it is in
tended that all matter contained in the above
description or shown in the accompanying draw
ings shall be interpreted as illustrative and not
in a limiting sense.
I claim:
prising an initially equilateral triangular body
with apices cut away on right lines to lines bi
secting the angles thereof whereby the ring body
has hexagonal outline and is de?ned by three
equal long edges and three equal small sides, the
triangular body having a central shaft opening
which is de?ned in part by the inner edges of
prongs struck out from the material of the angles
1. A retaining ring of the self-locking type
of the body and which are arranged on a circle
adapted to form an arti?cial shoulder on a shaft 10 of radius smaller than that of the shaft circle,
and in part by elongated shallow recesses extend
capable of preventing axial displacement of a
ing between each two of said prongs which pro
machine part mounted thereon, said ring com
vide shaft clearance and whose bottom edges ex
prising a substantially triangular body having a
tend parallel to the adjacent long edges of the
central shaft opening, three prongs struck out
from the material of the angles of the body and 15 ring body, whereby the edge portions of the body
along its long sides extend as straight arms con
having inner edges adapted to frictionally en
necting said prongs.
gage the shaft, the center lines of said prongs
5. A retaining ring as set forth in claim 4,
coinciding with lines bisecting the angles of the
wherein the side edges of the prongs are de
ring body, the inner edges of the body between
prongs being straight and parallel to the outer 20 ?ned by slits symmetrically arranged on both
sides of the lines bisecting the angles of the
side edges of the body and de?ning elongated
ring body.
shallow recesses opening into the shaft opening
6. A retaining ring as set forth in claim 4,
and which provide shaft clearance between the
wherein the free edges of the prongs extend as
prongs and the corresponding side edges of any
two prongs being substantial continuations of the 25 arcs of a circle of slightly less radius than that
of the shaft circle.
adjacent straight body inner-edge which extends
RUDOLF FEITL.
between said two prongs, the side edge portions
of the body thus extending as straight arms beREFERENCES CITED
tween and which effectively connect the prongs.
2. A retaining ring as set forth in claim 1, 30 The following references are of record in the
wherein the side edges of the prongs are de
?le of this patent:
fined by slits symmetrically arranged on both
UNITED STATES PATENTS
sides of the lines bisecting the angles of the ring
Number
Name
Date
body.
295,960
Van Dusen ________ __ Apr. 1, 1884
3. A retaining ring as set forth in claim 1, 35
334,790
McTighe __________ __ Jan. 26, 1886
wherein the free edges of the prongs extend as
968,991
Shafer ___________ _.. Aug. 30, 1910
arcs of a circle of slightly less radius than that
2,275,058
Draving ___________ __ Mar. 3, 1942
of the shaft circle.
4. A retaining ring of the self-locking type
adapted to form an arti?cial shoulder on a shaft 40
capable of preventing axial displacement of a
machine part mounted thereon, said ring com
2,309,613
2,383,164
2,435,079
Horton ___________ __ Jan. 26, 1943
Ryder ___________ __ Aug. 21, 1945
Hotchkin ________ __ Jan. 2'7, 1948
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