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Патент USA US2404862

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y _Juäy 0, 1946.
.
H. P. PHILLIPS
PISTON RING ASSEMBLY ELEMENT AND METHOD OF MAKINGv l‘
Filed Feb. 2, 1945
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2,404,862
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Juäy 30, i946.
H. P.- PHILLIPS;
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' 2,404,362
PISTON RING ASSEMBLY ELEMENT AND METHOD OF MAKÍNG
Filed Feb. 2, 1945
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2 sheets-sheet 2
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Patented July 30,1946
2,404,852
Unirse si‘nrss rnrsnr Nosriìcs
PISTON RING ASSEMBLY ELEMÉNT AND
`
Y`METH0D 0F MAKING
.
Harold E’. Phillips, Hastings, Mich., ‘assìgnor to
. Hastings .Manufacturing Company, Hasting
Mich., a corporation of Michigan ‘
` `
i
Application February 2, 1945, Serial No. 575,754y
.12 Claims.
.
1
(Cl. 309-44)
2
,
This invention krelates to improvements in >-pis
ton ring assembly element `and method of making.
Fig. ’7 _is afragmentary viewin section .on a
line corresponding ‘to line l-l of Fig. 8.
`
Fig. 8 is an edge or peripheral AView of the ring
The main objects of this 'invention are:
assembly of Figs.`6, 7 and 9.
First, to provide a piston ring or piston ring
assembly formed entirely of ductile metal which
can be readily and economically fabricated and
Fig. >9 is a transverse section on line 9_9 of
Fig. 6.
Fig. lois a perspective View of a strip or ribbon
of steel or metal such as is used Vin the forming
is not likely to be broken or distorted in use.
Second, to provide Va piston `ring or piston ring
assembly -having these advantages with the ad
vantage of ~very free Vdrainage thereby well adapt
of the piston ring element.
Fig. 11 is a perspective view illustrating the
second step or coiling step, the first step in the
manufacture being namely that of folding the
ing it for use as "an Aoil ring.
Third, to provide a piston ring element formed
entirely of ductile metal having side drain open
ings, the stock or metal `being continuous from
end to end ofthe v‘ring thereby providing uniform
characteristics of strength‘and resilience ‘and eX
ribbon stock longitudinally upon itself as a
straight strip, not being illustrated but it will be
understood from Figs. 1l and l2.
Fig. 12 is an enlarged perspective view `of the
multi-folded lcoil radially sectioned on line i12-*I2
pansibility throughout the length `of the ring.
Fourth, Vto provide a piston ring Velement
of Fig. 13.
'
‘A
`
`
Fig. 13 is a side elevation Viewed from the top
formed `of vductile metal which may be used as a
spacer element in combination with íiat elements 20
of Fig. 12.
formed of ribbon steel.
Fig. 14 is a Vfragmentary >view partially in sec
tion of Va punch or die apparatus used in the
upsetting of spaced reaches of the element shown
in Fig. 13 and illustrating a further step in the
"
Fifth, to providea method of manufacturing
piston ring elements whereby lelements -of uni
form characteristics maybe economically pro-k
Y
~
25 manufacture, the removable die member being
Objects relating to details and ‘economies of
shown in retracted position 'after the upsetting
the invention will appear from the -description
to follow. The invention is `defined `and pointed
Fig. 15 is an enlarged fragmentary'view'in ‘sec
out in the claims.
tion on vline Iii-_l5 of Fig. 14. `
A "preferred embodiment >of the invention is 30. Fig. 16 is a side view of the ring `element as
illustrated Ain the accompanying drawings, `in
removed rfrom the forming die and prior to per
which:
`
mitting it to spring open to the normal expanded
Fig. 1 is a fragmentary section of a piston ring
position shown in Fig. ’2.
embodying my invention, on line l l Vof Fig. 3,
In considering the accompanying drawings, it
installed in the `drainage ring groove of a piston 35 should be borne in ‘mind that no attempt has
and‘in operative relation to a cylinder, the piston
been made to .show the parts in ,their relative
duced.
step.
‘
'
.
and cylinder parts being shown Iconventionally
proportion or where associated with a piston and
cylinder to show the clearances and` relative
clearances.
'
dimensions.
4Fig.2 is an inner side elevation of one of the 40
The stock illustrated at l is relatively thin
piston ring' elements inyits expanded position.
but it Ymay vary considerably in thickness, den
Fig. 3 is an enlarged fragmentary edge or pe
pending somewhat on the size of the ring and
ripheral View ofthe ring assembly of Fig. l.
the character of .the material used and any range
Fig. `‘l is a fragmentary perspective View of a
from .007 to .0039, for example, >but desirably
piston ring element sectioned through an axially 45 from .01() ‘to .020. If the element `is designed or
upset reach thereof. i
v
intended merely as a spacer element for .a pair
and Without particular regard to dimensions or
Fig. `5 is a perspective ¿View of one of the piston
ring elements sectioned through a `spacer reach
of cylinder "wall 'engaging side members, for eX
ample as shown in Figs. 6 `to 9 inclusive, the
thereof.
i
spacer element may be of relatively soft material.
Fig. i6 »is an enlarged fragmentary section on «a 50 However, it may desirably Vbe made of wear
line ‘corresponding to line 5_5 of Figs. 8 and 9,
resisting materials even-when used as a spacer,
illustrating a piston ring assembly comprising a
one side ¿member of the element being used `as a
pair of flat side members with one of the Apiston
cylinder wall engaging or “contacting member.
ring Jelements of `this invention .as A.an interme
diate member.
.In Ythe drawings, `2 i represents :a »cylinder and
:55 ;3 apiston fhavìng 'a piston ring groove A therein
2,404,862
3
4
,
.
provided with drain passages 5. I will first de
ported close to the edge thereof and is rein
scribe> one of the piston ring elements and the
method of making as the description of the
method will aid in an understanding of the de
scription of the ring element.
forced so that it does not distort or vibrate in use.
I have'illustrated and described very practical
embodiments of my invention. I have not at
tempted to illustrate or describe other embodi- '
The ring element designated generally by the
ments or adaptations as it is believed that this
disclosure Will enable those skilled in the art to
embody or adapt my invention as may be desired.
numeral 6 is formed of a strip or ribbon of ductile
metal which is folded longitudinally upon itself
to form it into a general W-shape as shown for
Having thus described my invention, what I
example in Fig. 12, thusvproviding side members
claim as new and desire to secure by Letters
'l and 8 connected by a fold 9, the bights of the
fold I0, IO and II being open. These longitu
Patent, is:l
dinal folds can be effected in suitable fo-lding
rollers Which are not illustrated as they form no
~
engagingside elements formed of ductile wear
ble intermediate element formed of ductile Wear
resisting material folded longitudinally upon it
self into a plurality of radially disposed outer and
intermediate plies, the several plies being con
` _
After the strip I0 is folded longitudinally upon
itself, it is coiled edgewise, the coils being shown
in Fig. 11.
tinuous from end to end‘of. the element, one of
the plies being flat and of greater axial Width
These coils I 2 are cut intoannular
than the other plies and constituting a cylinder f
sections I3, the ends of the section forming the
ring spiral I4. In Fig. 13, the split of the an
nular element is substantially closed.
v/all engaging member, the other plies being
axially lconformed to provide alternate drain
,
It will be noted that the side member 'I is ñat.
The section I3 is laid upon an anvil member` I5
having an annular recess IS therein of such
Width as to receive the side member ‘I and pref
,
resisting material, and an annular split expansi
part of this invention.v The side member V'I is
preferably substantially Wider than the side mem
ber 8 and constitutes a cylinder Wall engaging A
member as shown in Fig. 1.
'
1. A piston ring assembly comprising a pair of
thin split nat annular expansible cylinder Wall
reaches and spacer reaches.
,
v
.
2. A piston ring assembly comprising a pairof
thin split nat annular expansible cylinder-Wall
engaging side elements formed of ductile Wear
erably support the ring in its collapsed position
resisting material, andan annular split expan
as shown in Fig, 13. Spaced reaches I'l of the
members 8 and 9 are then upset axially by means
of the die member I9 having an annular section
sible intermediate element formed of ductile wear
resisting material folded longitudinally upon it
self into a plurality of radially disposed outer and
intermediate plies, the several plies being con
of the radially arranged upsetting elements 2G
which compress the members 8 and 3 into side by
tinuous from end to end of the element, one of
side contacting relation With the member 1. The 35v the plies being flat, the other plies being axially
reaches 2I between the upset reaches I'I con
conformed to provide alternate side drain reaches
stitute spacing members. When the elements are
removed from the die, they normally spring to
the open position shown in Fig. 2 and Whenthey
are inserted into a cylinder they are collapsed and
they normally exert a substantial radial thrust
or unit pressure as it is commonly designated
against the cylinder Wall. These elements are
preferably formed of Wear-resisting metal such
as steelof proper carbon content although other
Wear-resisting metals and materials may be used.
Steel is found highly satisfactory particularly
Where the element is designed as a cylinder Wall
engaging element as is shown in the embodiment
of my invention illustrated in Fig, 1. In that em
bodiment, a pair of elements are arranged in op
and spacer reaches.
,
3. A piston ring element comprising a pair of
annular split resilient piston ring elements, each
4G> formed of Wear-resisting ductile metal folded
upon itself into‘a plurality of plies disposed in
side by side relation, one of the plies being flat
and of greater radial Width than the other plies
and’constituting a cylinder Wall engaging ele
,->ment, the remaining plies being conformed to
provide alternating spacer and side drain reaches,
-the drain reaches substantially exceedlng in
length the length of the spacer reaches, the ele
ments being arranged with the spacer reaches of
59;; one element Within the drain reaches of the other.
4. A piston ring assembly comprising a pair'of
posed relation as shown in Fig. 3, the spaced
annular split resilient piston ring elements,> each
members 2I being Within the compressed reaches
formed of Wear-resisting ductile metal folded
I'I Which provide side drain'recesses for the ele
upon itself into a plurality of plies disposed in
ments. In this arrangement, the reaches Il are ¿5D-¿side by side relation, one of the plies being fiat
preferably substantially longer than the reaches
and of greater radial Width than the other plies
2| so that suitable drainage is provided.
'
and constituting a cylinder wall engaging ele
In the embodiment of my invention shown in
'ment, the remaining plies being conformed to
Fig. 6, one of the elements is arranged inter
provide alternating spacer and side drain reaches,
mediate the flat cylinder Wall engaging members au4 the elements being arranged with the spacer
22 and constitutes a supporting and spacer mem- »
reaches of one element Within the drain reaches
ber therefor and also provides suitable drain
of the other.
.
openings or passages. In this embodiment, the
5. A split expansible inherently resilient piston
expander 23 acts only on the side members 22.
ring element formed of a ribbon of ductile Wear
In the embodiment shown in Fig. 1, t‘ne expander cs resisting metal folded longitudinally upon itself
23 acts upon both of the elements.
.
to provide a ñat cylinder Wall engaging side mem..
_It Will be noted that no part of the ring ele
ber, a'second side member of less radial Width
ment is cut away. The result is that the element
and an intermediate folded web portion of a Width
has very uniform strength and tension from end
substantially that of the second member but'
toend. It is not subject to breakage or likely 70- 'folded to space the said side members, said side
to be permanently distorted in manipulations to
member and said intermediate web member be
install the same. It may be made of quite thin
ing axially upset against the side ofthe cylinder
stock consequently presenting a thin or relatively
wall engaging member at spaced reaches thereby
sharp edge t0 the cylinder Wall and at the same
providing side drain openings, the spaced `por-'
Vtime >the cylindervvall engaging member is Sup 75 tions and the upset portions being continuous. -f f
2,404,862
5
6
6. A split expansible piston ring element formed
plurality of plies disposed side by side and coiled
of thin ductile Wear-resisting material and com
prising an annular flat cylinder wall engaging
side member, and a second side member of less
radial Width, the inner edges of said side member
edgewise after folding, one of the plies being flat
throughout and constituting a cylinder wall en
being integrally connected by a folded interme
diate member, said second side member and said
intermediate member having spaced reaches
thereof axially spaced relative to each other and
reaches intermediate such spaced reaches in 10
which the members are axially collapsed to pro
vide side drainage recesses.
gaging member, the other plies being upset axially
at spaced intervals against the inner side of the
cylinder wall engaging ply providing spaced side
drain openings.
10. A split expansible piston ring element
formed of a ribbon of ductile wear-resisting metal
folded longitudinally upon itself and coiled edge
wise to provide a flat cylinder wall engaging side
member and a second side member connected in- _
tegrally thereto by an intermediate return fold,
spaced reaches of said second side member and
a plurality of plies, one of the plies being ñat and 15 of said intermediate return fold being upset ax
ially providing alternating spacer reaches and
constituting a cylindrical Wall engaging member,
drain reaches.
spaced reaches of the other plies being upset
11. A split expansible piston ring element
axially into side by side contacting relation with
formed of a strip of ductile metal..folded longi
each other and with the cylinder Wall engaging
member, the reaches intermediate said upset 20 tudinally upon itself into a plurality of plies dis
posed side by side and coiled edgewise, the plies
reaches being of an axial Width substantially ex
being continuous from end to end of the element,
ceeding the upset reaches and providing there
one of the plies being flat and constituting a
with alternate spacer reaches and drain reaches.
cylinder Wall engaging member, the other plies
3. A split expansible piston ring element con
having spaced reaches axially upset providing
sisting of ‘a ribbon of ductile metal folded longi
alternating side drain recesses and spacer reaches.
tudinally upon itself and coiled edgewise provid
12. A split expansible piston ring element
ing a cylinder wall engaging member constituted
formed of a strip of ductile metal folded longi
by one edge of the ribbon, and a multiple fold side
tudinally upon itself into a plurality of plies dis
portion at one side thereof, said multiple fold
posed side by side and coiled edgewise, the plies
side portion being axially upset at spaced inter
being continuous from end to end of the element,
, vals to provide side drain recesses, the plies of the
one of the plies being'flat, theother plies having
multi-fold side portion between said upset por
'7. A_split annular resilient piston ring element
formed of ribbon steel folded longitudinally into
tions being axially spaced.
9. A split expansible resilient piston ring ele
ment formed of a ribbon of ductile Wear-resisting 35
metal folded longitudinally upon itself into a
spaced reaches axially upset providing alternat
ing side drain recesses and spacer reaches.
HAROLD P_ PHILLIPS.
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