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Патент USA US2404140

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vJuly 16, 1946.
T. E; MGFALL
'
` 2,404,140 ,
PI STON RING
Filed Jan. 3,' 1944
Afíorneql -
Patented July 16, 1946
2,404,140
UNITED _» ‘sTATEsÍ PAT IÁINTTEv 'Cil-“íFlog1f;`
ì
r'l'sfToN amd `
~
Thurlow'E..McFall, Sparta, Mich.
.
`
~ Application January 3, 1944', serial’No. 516,828
s Claims.
(C1. 309-44)
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2
This invention relates'to piston rings usedfin
internal combustion engines. It is a primary `ob
ject and purposeA of the present inventionrto’pro
vide a simple, economical,V easily` installed land
durable piston ring made entirely-oi steel; pref
» pistoninxwhich conventional compression rings
erably, and which is to be used in the oil‘grooves
of internal combustion engines for scraping ex
cess lubricating oil fromv thewalls of the cylin
ders and returning itvto'the crankcase of the
‘The ring construction >of two parts has, for
>usuallyiofcast iron are installed. The oil groove
.2 hasdrainage openings .3 fromy the bottom there
' of tothe interiorof the pistonfor passage of oil
to the engine crankcase.
f‘
one of its parts,A as in Fig..I 4, a thin SteeLrail- 4 ,
ordinarily `approximately ofÍ .025" stoclrwhich
has a parting‘at one side and which when` the
V10 `parting is closed takes »a substantially circular
The invention which I have devised for `the
form> to bear at its ¿outer edge against the wall '
ring consists of two parts with' whichgenerally
of a cylinder in which it is. installed. Such‘ring
there is associated an `expander spring in service.
bears with some ¿pressure againstthewall of a
engine.
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1
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However the ring. is 'complete' and-.operative with’V.cylinder-¿l as a tensionis created in it :whensit _is
out> the expanderv spring ywhich merely> provides 15 closed at its parting as must be` donel When _it is
additional pressure to press theï edges of the
placed within-a cylinder.
l
. .
ring parts Aagainst the 4walls of a. cylinder'for
.The othery ring member is made from alength
oil scraping, said ring" Without the expander
ofv flat metalv which'atg-one> side, is _continuous
having a `degree of pressure against the cylin
fromone end Lto the other, as indicated at 5, while
der walls which is increasedby the use of .an ex
20 at the 'opposite side edge it is formed to provide
pander spring.
Both `of the parts of- Vthering
>a plurality of fspaced apart tongues 6.
are readily and easily` made from suitable sheet
metaly of which steelis an example, and which
preferably will be used.
‘
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:î f:
The
tongues 6 are al1 bent upwardly and then Vin a
direction parallel to and spaced from the section
5 providing substantially.Í vertical sections .1» and
'
An understanding of the invention fmay» be l25 v‘terminal section_s‘lß lparallelwto, 'the `parti. 4 ,
had from the following description takenin con
When installed `»within a. ring> groove 2 of-> a
nection 'with the accompanying drawing,V in
piston normally a conventional expander spring
which
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Y
f
Slis placed »within l,the grooveVthe raî1,4 is then
-.
Fig. 1- is a plan view of one of the ring members
placed in the groove and the ringl member hav
used
Fig;in2-is
the apiston
fragmentary
ring of my
planinvention.V
of a length
~‘ `of
.„ ñat ‘30 ,ing-the continuousrail section 5 is located .over
-the rail 4 with the terminalparts 8v >of .the'tongues
metallic material fromwhich the lring «member
bearing against the upper. side o_f saidrail 4.
shown in Fig. 1 is made; a part of the tongues of
.This `provides p a ¿ ring. whichv has > the, lower rail
said member being shown as formed in blank
4 >andthe upper rail section 5„the outeredges of
and others in the completely fabricated state. " A 35 ‘which are. substantiallyflush with. each other.
Fig. 3 is a fragmentary edge view of the com.
The vertical legs] >of the tongues 6 which have
,been> bent as described bear at their inner sides
pleted
Fig. ring
4 is member.v
a fragmentary vertical
I ~ y, >section~eny. « l,
against the expanderfsprin’g 9. This ring mem
larged showing the installation of a complete ring
ber preferably atitsvv parting, aslshown in Fig. 1,
in the'oil groove of apiston..
t 40 Ihas two narrower tongues each` approximately
Fig. 5 is a view similar` to Fig._ 2.»1showing a `
onefhalf of the width, of the tongues >(i immedi@
modified form of ¿ring ~member,- two of` which i ‘ately at‘the ends of the ring, one at -each Yside i
are used for a complete ring.; «f l `
<
of the parting sothatwhenthe ringis closed it
».Fig. 6 isa section like Fig.»4 »illustrating the
is supported at,` eachvside vof theipartingjbyja
installationv of a complete ring using the 4ring ' 45, section 8a. bearing .againstthe rail 4.
.
parts of Fig. 5 inthe oil groove `ofia piston,'and
, With this construction thereareampleventing
Fig. 7~is a fragmentary outer` edgevview of the
spacesbetween the» parts ,1, and„>8_.ofvjadjacent »
complete
ring.
f
Y
i
,_
.
I,
,¿
.
t
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tongues for.l the ` passage i of Y oily .scraped . _fromfga
'
cylinder wall Vand. entering between 'rail' Land
Like reference charactersrefer to like .parts in
the different ñgures of the drawing.
.
. ,4
Thering 'of'.myl invention is designed for use
Y
50
the rail section 5. The expander springjnnor
1 mal. practice vhasgvent passages tlÍiroughÍit` for
with internal combustion engine pistons I which,
the-.Oil >to goto `thefbottom `o_f¿ .the ring'groove
as shown in Figs. 4 and 6, have an oil groove or
> and thence through the passages at 3. Itis >o'f
grooves 2 for receiving piston rings generally
course evident that so far as the invention is con
located below other piston ring grooves in the 55 cerned the rail 4 may be placed above the ring
V2,404,140
member consisting of
VVs
the rail section 5 and the .
Y V4
adjacent side of the rail section, said tongues be
ing substantially equally spaced throughoutl their
lengths, thefree ends of said tongues being spaced
inwardlyV a short distance from the outer edges
tongue sections 'l and 8, the invention being the `
same` if the two parts of the ring as shown in
Fig. 4 are reversed in position.
YIn Figs. 5,V 6 and '7, thepiston ring consists of
two identical ring'parts each produced in a man
nersimilar to the upper rail part of the ring
shown in Fig. 4.
of said flat rail section.
y
Y
3. A piston vring comprising,Y airing member.
.of thin flat metal havingA a substantially hori-zontal continuous rail section bent into substan
A length of nat metal has a ;
tially circular form and parted at one side, said
continuous rail section 50 at one side edge Yfrom
which spaced tongues ö?extended from the oppo 10 parting >-being adapted tol be<4 substantially closed
when the piston ring i's iwitlîlinf' a‘ï'eylinder, said
site sidef edge,` differing only froml the construe@
tion shown in Fig. 2 in that the tongues 60 are
rail section having a plurality of spaced tongues
spaced farther apart than the tongues lì.A The
~ integral with and extending from its. inner edges,
> Y _said tongues being bent'to provide terminal sec
Y width
60‘ is greater
of the spaces
than the
between
Width adjacent
of a tongue'
tongues'>
El).>V Íl-â'rl tions substantially parallelY to and spaced from
said' rail section, and Va ñat ring member of thin
The tongues are bent in a similar manner pro- '
sheet metal` located against the terminal sections
of said tongues in parallelism tothe rail> sec
tion of vthe i'lrst ring member.
vidingvvertical sections ‘l0 and horizontal termi»
nal-portionsßß. Two of such ring members, as
shown in Figs. 5 and 7 are placed 1n a rmg groove
2> against the expanderl spring 9, one being in 20 4. VA construction containing the elements in
verted in position withA respect'to the other, and ¿ combination defined inY claim V3, said flat ring
memberw'having a width equal to the distanceV
Ywith'rthe parts 10 and 8310i' the return bent'tbngue
.fromr the outer ~e'dgefofV said rail section to the
ßûsloca-ted side»v by side inY relation to each other.
rear faces offthe vertical sections of'saidftongues.
The'terminal sections 8l! bear'respectively against
5'. A' constructionicontaining they elements in
the lower side of the upper rail section' 570 and
combination'deíined. inîclaim 3,'said flat ring
>the upper' VsideY of'the lower railv 50J as shown in
member 'having a widthl equal' to' the distance
Fig-._-` 6. VIn suchV construction the distancabe
from the outer~ edge of'4 said rai1= section to the
tween the tonguesV 60 being greater than `the 'width
of_th'e,tong_ue space is provided for vthe passage of
rear vfaces ofthe 'vertical' sections of ' said tongues,
' -The .piston ring» constructions described Y pro-V
of the-vertical sections of said> tongues, the outer
edgesëof' said irail‘and^ of `said rail Vsection being
an expander spring bearing against theY inner
oil Vcollected Vby the'scraping edges of the rail 1
' sections> _'.iíl‘in vbearing r_against the cylinder walls.` ~ Vedge; of saidnflat'railand against îthe rear’sides
vide ra composite, Vringf'of Va minimum of parts
`
in substantially'vertical alinement.
which are very readily manufactured at lowest
' vcost both of materialY and labor, and which are '
inmanufacture is attained becauseofaminimum
of material and of parts needed. The ring is of
light weightand the inertia eiïects in their Yuse in
pistons
. '
greatly reduced.
’
stantially vertical sections 1_ and terminal sec?4
Y tions Si spaced from and‘paralleling- the rail'sec'
tion 5, and an integral side rail 4 located'against
_ the outer sides of said terminal sections 8. '
_'YíîrlfbpistonringY comprising; two identical ring
members each of' thin flat metal of substantially
circular form and parted’- atene vside to provide
and isjto befconsidered cemprehensive` ofi..L all 1.45
forms Yoi structure coming within'their scope. j,
" ‘I’ claim:
v
'the vinner> 'edges' thereof and lbent to form subn
`
he inventions defined in the appendedY claims
"
section 5,‘a plurality> of tongues extending 'from
installed Vin the ring groove withoutl danger of
breakage which many» times' occurs withY ring
parts of V`narrowcross section made of> cast iron
or similar'relatively fragile material. Economy
‘
` 6. A piston ring> comprising an integral'flatrail
>a continuous'side railîsection'except at-said part
ing, tongues equallyvspaced throughout-«their `
, flength's'i'ntegralv with and.' extending` from 'the
inner edges of said side rail sections', said tongues
`ing, an.. integral flatA rail section of' thin metal „.50 being bent at right angles to their respective rail
sections for a short distance and then bent again
of' a; curved form having a parting at one‘side,
to provide' terminal sections substantially parallel
said rail section'becoming substantially circular
to andspaced from their respective rail sections,
at its outer periphery when therpartingïisA closed,
said Yring members being located one overtheA
and a; plurality 'of' spaced tongues extending from
'other .with the _ rail _sections thereof bearing
the linner edges of- said- rail section, said tongues
beingV bent substantially at right angles to said ‘"55 against the outer sides of the 'terminal sections
rail section for a short distance and thereafter Y of the tongues of the opposite rail section, and
with said tongues of one ring member located
Yben'trtonlie substantially parallel to >and spaced
inthe spaces between the tongues of’ thevotherV
" fromgsaid- 'rail section',` said tongues being‘sub
Y g 1._ In >a, pistonA ring, a ring member Vcompris:
stantiallyv equally >spaced throughout their
'
'ring member.
.
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a curved< form'having lnormally a 'space or' part
8. vA vented oil groove piston ring having two
`members ’each including a' flat side railV portion
.ofi substantiallyicircular form parted' at one'side,
said rail portions adapted Ato'bear ¿against the '
ing between. its ends, Vsaidfrail section- when _` the I.
_parting is substantially closed having an voutert
circular; periphery, a plurality of spaced tongues
Veachfsi’de rail portion yand extendingffrom the
lengthsias specified.
"
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_Y 2.111 a piston ring, airing meinberof ‘thin nat
metal comprising,v a flat integral rail section oi"A
Vupper and lower sides ofr'a pistonïring vgroove re- v
spe'ctively', Vand tongues connected integrally with ,
Y inner edgesv thereof bentA -to extendiktoward the
tienandbent at a short distance from said inner i _opposite side rail and then bent toïpass-ïwithin
'edges/.ofthe rail section >to extend yall. in the t saidV opposite side-rail~ and against-which saidop-=
` ' .extendingjfrom the inner ~edges of said rail sec.
same directionv at" right angles to saidrail sec
tion forja distance and then return-bent into
substantial parallelism with and spaced from the
Vposite side railî bears at ‘its’ innerîsidaï asì 'speciñed
' i
THURLOW
-M'CFALL
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