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Патент USA US3137950

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June 23, 1964
Original Filed Nov. 15, 1960
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June 23, 1964
2 Sheets-Sheet 2
Original Filed Nov. 15, 1960
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United States Patent 0 ice
Patented June 23, 1964
plying means in the various positions which they assume
in three successive stages of a ring assembly operation;
Hans Erdmann, Maplewood, N.J., assignor to Waldes
ing tool shown in the preceding ?gures, with the parts
thereof in the position of FIG. 2; and
Kohinoor, Inc, Long Island City, N.Y., a corporation
of New York
FIG. 4 is a side elevation of the dispensing and apply
FIGS. 5 and 6 are transverse sections taken on lines
Original application Nov. 15, 1960, Ser. No. 69,475, new
5-—5 of FIG. 2 and 6—-6 of FIG. 3, respectively.
Patent No. 3,101,528, dated Aug. 27, 1963. Divided
Referring to the drawings in detail, and more particu
and this application Mar. 5, 1963, Ser. No. 263,387
larly to FIGS. 1—6 inclusive, reference numeral 10 desig
12 Claims. (Cl. 2‘)—211)
10 nates an upright standard or frame member to which the
dispenser and the power-operating means therefor is af
This invention relates to improvements in retaining ring
fixed, the latter comprising a double-acting air (or hy
dispensing and applying means, and more particularly to
draulic) cylinder 11, to whose opposite ends pressure ?uid
an improved power-operated magazine dispenser and ap
from a suitable source is alternately supplied and ex
plicator (sometimes also called a power-operated maga
zine applicator) for external split or nearly-closed retain 15 hausted via inlet and exhaust ports designated 12, 13,
under the control of a conventional four-way valve (not
ing rings which are adapted to provide arti?cial shoulders
shown). Reciprocable within the cylinder is a piston 14
for locating machine parts such as pinions, bearing races,
operating a piston rod 15 whose lower end is affixed (as
etc. on shafts, spindles and the like, the present applica
tion for Letters Patent thereon being a division of my
by screw-threading) to the upper end of a coaxially re
earlier application Serial No. 69,475, ?led November 15, 20 lated plunger 16 guided in its reciprocatory movement in
1960, now Patent No. 3,101,528, dated August 27, 1963.
Stated broadly, a main object of the present invention
a guide block 17. Illustratively, the lower end of the
plunger 16 is formed tubular as at 18, its tubular wall
is to provide a power-operated magazine-type dispenser
and applicator for external split retaining rings which is
having thickness corresponding substantially to the radial
magazine-type dispenser and applicator for external split
movement, for a purpose to be hereinafter described.
Width of the retaining rings to be assembled and inner
simple and durable in construction and inexpensive to 25 diameter corresponding to or only slightly exceeding the
inner~edge diameter of said rings, and thus the lower end
manufacture, yet very reliable and efficient in its opera
edge of the plunger is enabled to make face engagement
with a retaining ring disposed in the path of its lowering
Another object of the invention is the provision of a
Also secured to the frame member 10 in laterally
retaining means which incorporates simple yet highly ef 30
spaced, parallel relation to the coaxially related cylinder
fective means for automatically effecting one-by-one with~
11 and plunger 18, as by means of an angled bracket 19a,
drawal of the rings to be assembled from a stack or column
is a stack rod 19 carrying throughout substantially its
of such rings, and the controlled delivery of the so-with
entire axial length a thin, radially projecting blade 20
drawn rings to combined or associated ring-applying
35 which is adapted to extend outwardly through the gap
between the free ends of the plurality of retaining rings
Yet another object of the invention is the provision of
mounted on the stack rod. Thus, said stack rod and its
a magazine-type dispenser and applicator for external split
blade 29 is adapted to mount a plurality of split external
retaining rings which is characterized by practical and de
retaining rings R to be dispensed in a vertical column
pendable power-operated means for effecting one-by-one
whose rings are accurately aligned by said blade 20.
withdrawal of the rings to be assembled from a stack or
Below the stack rod 19, the upright frame member 10
column of such rings, the delivery thereof to combined or
mounts a horizontal table or shelf member 21, whose
associated ring-applying means, and ?nally, the applica
upper surface, in conjunction with side members 22a, de
tion or assembly of said rings on shafts, spindles and the
like positioned to receive same.
?nes a slideway for a slide 22 mounted for reciprocatory
A more particular object of the invention is the pro 45 travel therein. Slide 22 is held in its normal or retracted
position as by means of a spring 23 reactive between the
vision of a power-operated magazine-type dispenser and
blind inner end of a hole 24 provided therefor in the
applicator for split external retaining rings, wherein a plu
relatively outer side edge of said table and a down-bent
rality of such rings are arranged in stack or column
formation on a table or shelf-like member having a ring
?ange 25 on the free or outer end of the slide 22.
“drop-through” opening of size and con?guration corre 50 slide has thickness corresponding to the axial thickness
of one of the rings R carried by the stackrod, and it is
sponding substantially to that of said rings but which is
further provided with a ring opening 26 sized and con
offset a small distance laterally from the lowermost ring
?gured substantially to the size and con?guration of the
of the column whereby to form an arcuate ledge on which
outer edge of said retaining rings. When the slide 22 is
said ring and all rings above same are normally supported
along only an outer peripheral portion thereof and fur 55 in its retracted position, in which it is shown in FIG. 1,
said opening 26 directly underlies the stack rod 19 and
ther'incorporating power-operated means for shifting the
thus accommodates the lowermost ring of the ring column ‘
lowermost ring of the column laterally to a position in
disposed on the stackrod. To permit the slide to partake
which it aligns with and thereupon proceeds to drop
of its reciprocatory travel beneath the stackrod, the latter
through said opening, and thereupon for applying said ring
on a shaft or spindle positioned to receive it.
The above and other objects and features of advantage
60 terminates at its lower end at a level which is just above
the upper face line of said slide, and thus it will be seen
that both the slide and the ring R contained in the ring
opening 26 thereof may move sidewardly with respect
to the stackrod 19.
tion will appear from the following detailed description, :65 At its inner end, the slide 22 is provided with a pair
in which reference is had to the accompanying drawings
of laterally, spaced upright lugs 27, 28 which together
illustrating a preferred physical embodiment thereof, in
in effect de?ne a socket in which'is received the lower
roughly ball-shaped end 30a of the generally upright
FIGS. 1, 2 and 3 are front elevational views, partly in
arm 38 of a double-armed or bellcrankrlever 31 pivoted
section, of a power-operated or automatic-type ring dis
to the support plate 10 as at 32 for swinging movement
pensing and applying means according to the invention,
relative thereto. The other arm 33 of said lever extends
said ,views illustrating the parts of the dispenser and ap
generally horizontally into the path of upward movement
of a power-operated split external retaining ring dispens
ing and applying means according to the present inven
of the plunger 16 and terminates in a ?nger 33a adapted
to be engaged by the upper end of said plunger in the
upper end of the spreading mandrel from the chute 36
is positioned thereon in readiness to be spread by its
uppermost position of the latter, as is best seen in
FIG. 2.
axial movement along said mandrel to an inner diameter
enabling it to be readily shifted over the end of the
The aforesaid table or shelf 21 mounting the slide 22 Cr grooved shaft on which it is to be assembled and there
is provided with a ring “drop-through” opening 34, i.e.
an opening of the size and con?guration as will permit
upon pushed axially along said shaft to the plane of its
groove, whereupon it will spring-seat itself in said groove.
As will hereinafter appear, progressive axial movement
of the ring along the mandrel and shaft end is effected
it is a feature of the invention that said drop-through 10 by the tubular end 13 (acting as a push head) of the
plunger 16 being actuated downwardly over the mandrel,
opening 34 is offset a small distance laterally (to the
as seen in FIGS. 3 and 1, respectively. To permit of
right) from the slide opening 26 in the normal position
this push-head movement which would otherwise be
of the latter, and similarly from the lower end of the
impeded by the chute 36, the tubular push head is pro
stack rod 19. Accordingly, assuming the slide to be
vided with an axial slot 18a in its side wall portion in
positioned in its normal or retracted position in which
line with said chute, the action thereof in accommodating
it is shown in FIG. 1, that portion of the upper surface
the chute being also seen in FIGS. 1 and 3.
of the table or shelf 21 (designated 35 in FIGS. 1 and 3)
While it is believed that the functioning of the power
which bounds the drop-through opening 34 and is ex
said lowermost ring of the ring column to drop through
the same when said ring is aligned therewith. However,
posed by the slide opening 26 provides a supporting rim
operated combined ring dispenser and applying tool or
or ledge on which a portion of the outer perimeter of
apparatus as aforesaid will be clear to those skilled in
the lowermost ring of the column is engageable and thus
the ledge supports said ring and hence the entire ring
column. However, when the slide 22 is shifted in right
wise direction the amount such that its ring opening 26
registers with the drop-through opening 34 in the table
or shelf 21, said lowermost ring is brought into registry
with the drop-through opening, whereupon it is free to
the art, such is brie?y summarized as follows: Assuming
that the tool parts are in their FIG. 1 position, in which
piston 14 has just completed its downward or Working
stroke and the push head end 18 of the plunger 16 has
just completed a ring-assembly operation, and that ac
cordingly the next cycle of tool operation is about to
and will drop by gravity through said opening. This
retracted position consequent to the upper end of the
plunger 16 having fallen away from the ?nger 33 of the
start, it will be seen that the slide 22 is in its normal or
inward movement of the slide 22 also brings the slide
to a position in which its ring opening 26 is now dis 30 bellcrank lever 31, and that the ring column is being
temporarily supported on the ledge surface 35 of the
posed out of register with the stack rod and the column
shelf or table 21 which surrounds the drop-through
of rings maintained thereon. Accordingly, in the inner
position of the slide 22 (see FIG. 2), the slide functions
as a support for the column of rings disposed on the
stack rod 19.
Extending into the drop-through opening 34 from be
neath is the upper end of an inclined rail-form ring
chute 36 having a ring orienting blade 37 corresponding
to the stackrod blade 20.
Preferably, the chute 36 is
opening 34 thereof. Upon pressure air being admitted
to the lower end of the power cylinder 11 through the
inlet port 13 thereof, the piston 14 is actuated to its
uppermost position shown in FIG. 2. During the course
of this movement, the plunger 18 retracts from the
spreading mandrel 39, and also the ?nger 33a of the
bellcrank lever 33 has been engaged by the upper end
supported in operative position (see FIG. 6) by a block 40 of said plunger, as results in counter-clockwise movement
38 secured in inclined relation to the up-right frame mem
ber 10 below the ring table 21, the arrangement and dis
position of the chute being such that it is operative to
catch, i.e. be ringed by, the ring dropping through the
being imparted to the bellcrank lever as in turn causes
the slide 22 to move to the right. Such slide movement
results in the lowermost ring of the ring column which
has previously been supported on the ledge surface 35 as
opening 34 and then to guide said ring in a downwardly
aforesaid moving laterally until it directly registers with
inclined path on to the
conical spreading head
nected to the lower end
coaxial with and in the
the drop-through opening 34 of the shelf or shelf 21,
upper end of an upright frusto
or mandrel 39 operatively con—
of said chute and being disposed
path of movement of the lower
end of the plunger end 18.
Rather than being rigidly
connected to the lower end of the chute 36, the mandrel
39 preferably has an axially yieldable connection there
with comprising a rod or pin 46 affixed to and extending
downwardly from the end of the chute and whose lower
end projects axially through the mandrel which as seen
in FIG. 2 is formed with an elongated bore. At its
lowermost end, said rod 40 mounts a spring-retaining
washer 41 and contained within the bore of the mandrel
and reactive between its blind end and said washer is
whereupon said ring drops through said opening and
thence on to the upper end of the rail-form chute 36,
by which it is directed on to the upper end of the spread
ing mandrel 39 now fully axially contracted with respect
to the pin 40 by which it is connected to said chute. In~
asmuch as the plunger 16 is now in its fully raised posi
tion, the aforesaid ring is free to slide down the chute
36 without such movement being interfered with by the
lower end of the plunger. Upon arriving at the upper
end of the spreading mandrel 39, the ring lowers a small
distance thereon, as in FIG. 2, consequent to the mandrel
upper end having appreciably smaller diameter than that
of the inner edge of said ring.
a coil spring 42 normally maintained partly compressed. 60 When the piston 11 reaches the uppermost end of its
stroke, air supply to the cylinder 11 is reversed, where
Thus the mandrel is normally held against the lower
end of the chute 36 as in FIG. 2, but it may move axially
downwardly therefrom for a limited distance, as seen
in FIGS. 1 and 3. This axial extensibility and retracti
bility of the mandrel is of advantage in automatically
adjusting the tool as a whole to different lengths of
shafts and/or the shaft ?xtures used in securing the
shafts in position to receive a retaining ring from the
As best seen in FIGS. 1 and 2, the ring-spreading man
drel 39 has an upper-end diameter which is somewhat
less than the unstressed inner-edge diameter of the rings
to be assembled and a lower-end diameter substantially
equaling that of the shafts or pins on which the rings
are to be assembled.
Thus, a ring dropping on to the
upon the piston moves downwardly and imparts corre
sponding downward movement to the plunger 16. Just
prior to the air supply being reversed as aforesaid and
in any case before such plunger movement having taken
place to an appreciable extent, a grooved shaft S support
ed, for example, in a ?xture F and in whose groove G the
ring now disposed on the upper end of the spreading
mandrel is to be assembled, will have been moved into
place beneath the mandrel 39, as is also shown in FIG. 2.
During the early portion of the downward movement of
the piston 14 and its plunger 16, the latter moves away
from the ?nger 33a of the bellcrank whereupon the slide
22 returns to its normal retracted position under the bias
75 of spring 23. Such movement brings the slide opening 26
in registry with the previously next higher ring of the
on axially therealong in direction as to effect spreading of
column which now proceeds to lower through said open
ing on to the ledge 35 of the plate or shelf member 21.
said ring.
4. A power—operated dispenser and applicator as set
forth in claim 1, wherein said mandrel is mounted in paral
Thus the ring column lowers the distance corresponding
ot the axial thickness of one ring on to said ledge which
now supports same. Continued lowering movement of
lel relation to and at a level below said stackrod, and said
chute means is mounted in inclined relation between the
under side of said table and the upper end of the mandrel.
the plungers and its cylindrical end 18 acting as a push
head brings the lower edge of the latter into engagement
5. A power-operated combination dispenser and appli
with the upper face of the ring on the spreading mandrel.
cator as set forth in claim 1, wherein said plunger termi~
Assuming the spring 42 to be a relatively light spring, 10 nates in a cylindrical open-bottom push head having tele
such engagement ?rst causes the spreading mandrel to
scoping relation with said spreading mandrel and said
lower on to the upper end of the shaft S. However, upon
chute means includes an inclined rail whose lower end
the resistance of the spring having been overcome, ?nal
extends into the path of movement of said push head, said
downward movement of the plunger 16 and its push head
push head being provided with a longitudinal slot for
end 18 pushes the ring downwardly over the now ?xed 15 accommodating said lower end whereby it may telescope
spreading mandrel, as effects spreading thereof to an
on said mandrel without interference therefrom.
inner diameter corresponding to that of shaft diameter.
6. In a power-operated combination dispenser and ap
plicator for dispensing split external retaining rings and
By design, the stroke of the piston and plunger 16 is
applying them to grooved shafts, pins and the like, the
axially along the shaft S until the ring reaches the plane 20 combination of stackrod support means, a stackrod sup
of the shaft groove G whereupon its spring-seats itself in
ported on said means and operative to mount a plurality
such as to cause the lower edge of the push head to move
said groove. Thereupon the cycle is completed and a new
of the retaining rings to be dispensed in a column movable
towards the lower end of the stackrod, a ring-column sup
cycle corresponding to that just described begins.
Without further analysis, it will be appreciated that a
porting table disposed below and spaced from the lower
power-operated magazine dispenser and applicator for
25 end of the stackrod a distance corresponding substantially
split external retaining rings as illustrated and described
to the axial thickness of one of said rings, a slide opera
tive in the space between the stack rod and table, said
herein satis?es the objectives of the invention as earlier
set forth. However, as many changes could be made in
slide and table each having a ring drop-through opening,
carrying out the above constructions without departing
means for maintaining the slide in a normal retracted
from the scope of the invention, as de?ned in the append 30 position in which its opening directly underlies the stack
ed claims, it is intended and to be understood that all
rod whereby it is adapted to receive the lowermost ring
matter contained in the above description or shown in the
of the column thereof, the table opening being offset
accompanying drawings shall be interpreted as illustrative
laterally from said stackrod slide opening, a frusto-conical
and not as limiting.
ring-spreading mandrel disposed at a lower level than and
I claim:
35 to a side of said stackrod and table, an inclined ring chute
1. A power-operated combination dispenser and appli
extending between the table and mandrel and having its
cator for split-external retaining rings comprising, in com
upper end disposed to receive a ring falling through the
bination, stackrod supporting means, a stackrod a?ixed
table opening and its lower end related to the mandrel
to said means including ring-orienting means for maintain~
so as to guide said ring on to the upper end thereof, a
ing a plurality of the retaining rings to be dispensed in
accurately oriented and column-forming relationship, a
reciprocable slide disposed immediately below the stack—
rod and having a ring-receiving opening for the endmost
ring of the column which in the rest position of the slide
is aligned with the stockrod thereby to receive the lower 45
most ring of the column, a supporting table for the slide
having a ring drop-through opening therein which is offset
laterally from the stackrod an amount such that the table
surface extending about said opening and which is ex
posed by the slide opening normally supports the end
most ring and thereby all rings of the column above same,
a ring-spreading mandrel operative to spread a ring re
ceived thereon to a diameter such that it may be shifted
over the end of a grooved shaft for assembly thereto in
response to said ring being moved axially along the man
drel, chute means operatively related to and extending
reciprocatory hollow plunger coaxial with said mandrel
and adapted to telescope thereover, thereby on its work
ing stroke to push a ring received on the upper end of
the mandrel axially therealong, and power means for
actuating the slide to and from a position in which its
opening registers with the drop-through opening of the
table and for reciprocating said plunger in timed rela
tion to such slide movement as effects spreading of the
ring which has dropped through said slide and table
7. A powered combination dispenser and applicator
as set forth in claim 6, wherein said power means in
cludes an air cylinder disposed above and operatively
connected to said plunger, and a mechanical connection
between the plunger and the slide for actuating the slide
55 as aforesaid responsive to the return stroke of the plunger.
8. A powered combination dispenser and applicator
between said supporting table and said mandrel for con
as set forth in claim 7, wherein the mechanical connection
veying a ring dropping through said drop-through opening
comprises a bellcrank lever mounted for rocking move
to said mandrel, and power-operated means for effecting
ment, the free end of one arm thereof being operatively
positive controlled movement of the slide to and from a 60 connected to the slide and the free end of the other arm
position in which it disposes its opening directly over said
drop-through opening.
2. A power-operated combination dispenser and appli
extending into the path of motion of the plunger.
9. A power-operated combination dispenser and ap
plicator for split external spring rings comprising, in com
bination, a vertical frame member, a horizontal table
cator as de?ned in claim 1, wherein said last means in
cludes a powered reciprocating plunger and a bellcrank 65 member mounted thereon, a generally upright stackrod
af?xed to the frame member above the table member, a
lever, one arm of which is disposed in the path of the
ring slideway provided on and extending across the top
plunger so as to be rockable thereby and the other arm
of the table member beneath the stackrod, the lower
is connected to the slide in such manner as to convert
rocking movement of said lever into reciprocatory motion 70 end of the stackrod being spaced above said slideway a
distance approximating the axial thickness of one ring
of the slide.
3. A power-operated combination dispenser and appli
of a column of such rings mounted on the stack rod, a
slide mounted for reciprocatory movement in said slide
way and operative on its working stroke to push the
comprises a cylindrical push head adapted to telescope
lowermost ring of the column thereof disposed on the
said mandrel and in so doing to push a ring received there 75 stackrod in sideward direction along the slideway, power
cator as de?ned in claim 1, wherein an end of the plunger
means operatively mounted on the frame member above
the table member in generally parallel relation to the
slide opening normally underlying the stackrod and the
table-member opening being offset laterally from the
stackrod, a tubular plunger coaxial with and reciprocable
by said power means in a path traversing that of ring
movement, a ring-spreading mandrel disposed below the
.stackrod in the direction of said chute means and over
slideway and in coaxial alignment with said plunger and
thereby in position to be telescoped by said plunger when
lying the ring-receiving end of the chute means, the con
struction and arrangement being such that the lowermost
ring of the ring column is normally received in the slide
opening but is pushed into alignment with the table-mem
ber opening, through which it drops to the chute means,
during the course of travel of said slide throughout its
the latter moves on its downward stroke, ring-chute
means extending between the slideway and the upper
end of the spreading mandrel, and means depending on 10 working stroke as aforesaid.
plunger travel in upward direction for actuating the
slide throughout its working stroke thereby to effect trans
fer of said lowermost ring to the upper end of the spread
ing mandrel via said chute means and on plunger travel
12. A power-operated dispenser and applicator as de
?ned in claim 11, wherein the table-member opening is
offset from the slide opening a limited distance such as
to expose only that portion of the table slideway which
in return direction for spreading said ring by forcing it 15 extends as a ledge about said table-member opening and
wherein the ring column is normally supported on said
downwardly along the length of said mandrel.
10. A power-operated dispenser and applicator as de
?ned in claim 9, wherein said table member is provided
with a drop-through opening leading to said chute means,
and said slide is operative during its working stroke to
push said lowermost ring to a position above said chute
means whereby it may drop by gravity thereonto.
11. A power-operated dispenser and applicator as de
?ned in claim 9, wherein said slide and said table mem
ber are each provided with a drop-through opening, the 25
References Cited in the ?le of this patent
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