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Патент USA US2411757

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2,411,757
Patented Nov. 26, 1946
UNITED STATESl Y PATENT OFFICE
2,411,757
PIS'I‘ON RING
Jesse A. Ramsey, Wenonah, N. J.
Application July 14, 1944, -Serial No. 544,874
s Claims. '(01. 309-44)
1
2
This invention relates to new and useful im
provements in a piston ring assembly.
More particularly, the invention proposes an
Another object of the invention is the construc
tion of a device as mentioned which is simple and
durable and which may be manufactured and
improved piston ring assembly which ls charac
' sold ata reasonable cost.
terized by a bull ring mounted in a -groove of a , 5
piston and having a transverse' face formed with
an annular recess spaced inwards from the outer
edge thereof and cooperative with an annular
member mounted in the annular space between'
.
For further comprehension of the invention,
and ofÍ the objects and advantages thereof, ref-l
erence will be had to the following description
and accompanying drawings, and to the append
ed claims in which the various novel features of
said transverse face and one transverse face of 10 the invention are more particularlyset forth.
In the accompanying drawings forming a ma
said groove in the piston ring, and said annular
member being formed of a plurality of sections
having their ends in end alignment with each
terial part of this disclosure:
Fig. 1 is a sectional view through a cylinder
other and having an annular projection engag
provided with a piston having a piston ring as
ing saidannular -recess for limitingV extension of 15 sembly constructed in accordance with this in
said sections. It is also proposed to provide seal
ing pieces set into radial recesses in said annular
member and overlapping the adjacent ends of
said sections and having- projections engaging re
cesses in said annular member for limiting ex
tension of the sealing pieces. Resilient means is
vention.
.
.
Fig. 2 is a horizontal sectional view taken on
the line 2-2 of Fig. 1.
Fig. 3 is a fragmentary enlarged vertical sec
20 tional view taken on the line 3--3 of Fig. 1.
Fig. 4 vis another fragmentary enlarged vertl
cal sectional view, this view-being taken on the
used for extending said sections and sealing
line 4-4 of Fig. 2.
_
pieces against said limiting projections.
Fig. 5 is'an enlarged detailed view of a portion
An important feature of the new piston ring
I
resides in the fact that because of its inherent 25 of Fig, 2. '
Fig. 6 is a perspective view of one of the seal
construction the sections of the annular member
cannot engage against the wall of a cylinder with
such destructive force as to cut and groove the
pieces.
'
Fig. 7 is a fragmentary perspective view of one
of the sections of the piston ring.
cylinder wall. >Because the sections of the annu
lar member are restrained the possibility of their 30 Fig. 8 is a perspective view of one of th'e springs
breaking is materially reduced.
_
Because the annular member is formed of sec
tions it eliminates undue strain which develop as
the piston ring wears, causing uneven cylinder
wear and ring breakage. In general, the new
and improved piston rings have a long life because as they wear it is~ possible to re?inish the
limiting projections and thus compensate for
wear.
-
Furthermore, no matter how much the piston
ring is worn over a period of years, the seal pieces
will keep the joints sealed so that no leakage
takes place. The resilient means prevents leak
age out from under the seal pieces. It seals the
used in the piston ring assembly.
The new and improved piston ring assembly,
according to this invention, is used in combina
tion with a piston IU having a peripheral groove
II for a piston ring assembly. This piston I0 is
shown constructed with a follower I3 and a main
part I4 secured together with fastening elements
I5, such as studs, so that the piston'assembly may
be engaged into and removed from the groove I I.
The new and improved piston ring assembly is
disposed within the groove II and vincludes a bull
ring I6 mounted within the groove Il and having
» a transverse face I1 formed with an annular re
cess I8 spaced inwards from the outer edge there
45 of. An annular member I9 is mounted in the
annular space between the transverse face I1
The invention contemplates the‘use of more
than one piston ring'assembly in one groove, in
and one of the transverse faces of said groove II.
> The annular member I9 is formed from a plural
accordance with thisA invention.
joints immediately under the seal pieces.
’
Thenew and improved piston ring assembly
requires no cylinder -oil.
pins or other weak members to work loose and
destroy the usefulness of the piston ring. The
new and .improved piston ring assembly- works
equally well in liquid ends of pumps and auxiliary
machinery.
`
ity of sections having their ends in end alignment
In the particular design dis
closed the annular member I9- is formedl of four
sections.
The annular member I9 is provided with an
annular projection 20 complementary to and en
55.. gaging said annular recess I8 and forming a lim
There are no screws, 50 with each other.
. @411,757
3
Y
4
iting means for preventing extension of the sec
‘ While I have illustrated and described the pre
tions forming the annular member I9 more than,y -
ferred embodiments of my invention. it is to be
understood that I do not limit myself to the pre
cise constructions herein disclosed and the right
is reserved to all changes and modifications com
ing within the scope of the invention as defined
a certain predetermined amount. Sealing pieces
2i are set into radial recesses 22 formed in the
annular member I9 and overlap the adjacent
ends of the sections thereof. These sealing pieces
in the appended claims. '
2| have projections 23 engaging recesses 24
Having thus described my invention, what I
formed in said annular member I9 for limiting
claim as new, and desire to. secure by United
extension of the sealing pieces. Resilient means
in the nature of springs 25 engage against the l0 States Letters Patent is:
1_. In a piston having a bull ring adapted to be
sections of the annular member I9 and the seal
ing pieces 2i for urging them into their extended _
positions.
mounted in a groove and having a transverse face
formed with an annular recess spaced inwards
from the outer edge thereof, an annular member
The inner diameter of the annular member I9 f
is formed with recessed portions 29 forming room 15 mounted in the annular space between said
transverse face and one transverse face of said
for the springs 25. Each spring 25 is formed from
‘ a strip of spring material. Each spring has a cen
groove and formed of a plurality of sections hav
ing their ends in end alignment with each other
trall curved portion 21 and offset ends 28. The
and having-an annular projection engaging said
ends 28 rest against a flange 29 extended up
wards from the bull ring I9. The central por 20 annular recess for limiting extension of said sec
tion of the spring 21 engages against the pro
' tions, sealing pieces set into radial recesses in said
annular member and overlapping the adjacent
jection 23 of the sealing piece 2l and against tne
ends of said sections and having projections en
adjacent end portions of sections of the annular
gaging recesses in said annular member for limit
member I9.
In the particular design of piston ring assembly 25 ing extension of said sealing pieces, and resilient
disclosed on the drawing a second annular mem
means for extending said sections and sealing
ber I9' is associated with the bottom side of the
pieces, comprising leaf springs mounted within
bull ring 1s. More particularly, the piston lo
recesses formed in the sections of said annular
has an auxiliary bottom groove portion II’ into
member.
which the second annular member I9' engages.
The bottom face ofthe bull ring I6 is formed
with an annular recess I8' which is engaged by a
'
2. In a'piston having a bull ring adapted to be
mounted in a groove and having a transverse face
formed with an annular recess spaced inwards
complementary projection 20’ formed on the top
from the outer edge thereof, an annular member
of the annular member I9’. The annular mem
mounted in` the annular space between said
ber I9’ is mounted in an annular space between 35 transverse face and one _transverse face of said
the bottom transverse face of the bull ring I6 and
groove and formed of a plurality of sections hav
the adjacent faces of said auxiliary groove por
ing their ends in end alignment with each other
tion II'.
`
and having an annular projection engaging said
Sealing pieces 2I are set into radial recesses
annular recess for limiting extension of said sec
formed in the bottom of the annular member I9’ 40 tions, sealing pieces set into radial recesses in said .
at the overlapping adjacent ends of the sections
annular member and overlapping the adjacent
thereof. These sealing pieces 2| have their pro
ends of said sections and having projections en
jecting portions 23 engaging recesses in the an
gaging recesses in said annular member for limit
nular member I9’ for limiting extension of the
ing extension of said sealing pieces, >and resilient
sealing pieces. The sections of the member I9’ 45 means for extending said sections and sealing
are limited in their extension by the projections
pieces, comprising leaf springs mounted within
20' engaging the shoulders I8'. Springs 25 are
recesses formed in the 'sections of said annular
engaged within recesses 26 formed in the annular
member,- said springs having offset ends and hav
members I9' and serve to extend the sections of
ing curved central portions which engage against
the annular member I9' and the sealing pieces 2I
said sections and sealing pieces.
substantially in the same manner as described
3. In a piston having a bull ring adapted to be
relative to the flrst mentioned annular mem
mounted in a groove and having a transverse face
ber I9.
,
formed with an annular recess spaced inwards
The operation oi’ the piston ring assembly may
from the outer edge thereof, an annular member
be understood from the following;
mounted in the annular space between said trans
The springs 25 urge the sections of the annular
_verse face and one transverse face of said groove
members I9 and I9’ and urge the sealing pieces
and formed of a plurality of sections having their
l2| outwards against the limiting shoulders I8
ends in end alignment with each other and hav
and I8’ and the shoulders formed by the recesses
ing an annular projection engaging said annular
24 in the annular members so that the outer di 60 recess for limiting extension of said sections, seal
ameter of the annular members I9 and I9’ are
ing pieces set into radial recesses in said annular
limited in their resilient engagement against the
member and overlapping the adjacent ends of
said sections and having projections engaging re
wall of the `cylinder I2. For this reason Vthe pis- ,
ton rings are restrained from grooving and dam
cesses in said annular'member for limiting exten
aging the cylinder wall.
sion of said sealing pieces, and resilient means for
In fact, the piston _rings may be'used in a dam
extending said sections and sealing pieces, said
aged cylinder wall, and after a time the damaged
bull ring being provided with another annular re
surface will be worn away and the piston rings
cess on another transverse face thereof, a second
will work better than when initially mounted in
annular member mounted in the annular space
position. They may be reset from time to time
between said second transverse face and another
whenever adjustment is required by merely in
transverse face of a portion of said groove in the
creasing the diameter of the shoulders I8 and I8'
piston and formed of a plurality of sections hav
of the bull ring I6. This permits the annularv
ing their ends in end alignment with each other
and having an annular projection engaging an
membersV I9 and I9' to extend a slight distance
further and compensate for wear.
75 annular recess for limiting extension of said sec
2,411,757
tions, and additional sealing pieces set into radial
recesses in said second annular member and over
lapping the adjacent ends of thesections thereof
for urging the sections oi’ the second-named an
nular member and their sealing pieces into lim-»_
ited extended positions, and said resilient means
comprising leaf springs mounted within ‘recesses
and having projections engaging' recesses in said . 5 formed in the sections of said annular members.
latter annular member for limiting extension of
JESSE A. RAMSEY.
the sealing pieces, and additional resilient means
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