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NOV. 26, 1946.
v
¢ '
P; ENDEBAK -
2,411,509
SHAFT SEAL
>Filed Aug. 4, 1944 n
_7X/VENTO@
4 Trop/VE V
v
Patented Nov. 26, 1946
t 2,411,509
l UNITED s'rA‘rßs PATENT-ortica
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SHAFT
SEAL
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Peter Endebak, Chicago, Ill., assignor to Tuthill
Pump Company, Chicago) Ill., a corporation of u
Illinois
Application 'August‘dg 1944, Serial No. 548,067
5 Claims.
l
(C1. 28s-7i "
„
This invention relates to improvements in
seals for shafts or the like, and has for its prin
cipal dbject to provide an efllcient, durable de
vice of the character described which is ex
tremely simple and economical rin. manufacture
and easily assembled or disassembled.
for the outer end of the spring I4, which fits over
the inner end of said collar, as shown in Figure-1.
An additional finger longer than the fingers 23,
is also provided, consisting of an outwardly -bent
portion 25 and an elongated offset terminal por
tion 26, which is adapted to extend in parallel
spaced relation to the shaft, to form a retaining
means for the drive pin 21.
The pin 21 may be fitted loosely in an aperture
. Flgure’l shows the seal in longitudinal sec
10 formed in the shaft I0 with its outer_end en
tion, as applied to a shaft.
gaged in the slot 28 formed at the outer end of
Figure2 is a detail end view of the thrust col
the collar I5 below the linger portions 25 and 26.
I - lar forming part of the seal.
The innerv end of the coil spring I4 has a pro-r
Figure 3 is a detail perspective view~` of the
jecting portion 29 adapted to be non-rotatably
drive collar forming another part of the seal.
Referring now to details of the embodiment of 15 but detachably engaged with the thrust collar I2
The invention may best be understood by ref
erence to the accompanying drawing, in which:
' my invention shown in the drawing, -III indicates
a rotatable shaft, which has bearing in a fixed
bushing I I. The seal is designed to prevent leak
age of fluid between -the shaft and its bushing,
and includes as its elements a thrust collar I2,
packing ring I3, spring I4, drive collar I5 and
drive pin 21.
_
’
.
'I'he thrust collar I2 is cylindrical >in shape, with
as by insertion in a longitudinal hole 30 formed
in the latter. The outer end of said spring has a
similar 4projecting portion 3| which is ‘adapted
to be non-rotatably. but detachably engaged with
one of the fingers 23 on the drive collar I5.
The use and operation of the device above de-scribed will now be understood as follows:
The sealing rlngI3 is initially inserted within
the groove I8 of the thrust collar I2 so that these
a central bore I1 adapted to fit loosely on the
`shaft IIl. The bore I1 is formed with a hollowed 25 two parts may be handled as'a single unit.
annular groove I'8 intermediate its ends, within
The seal parts are assembled by slipping the
, which is fitted an annular sealing member I3,
thrust collar I2, spring I4 and drive collar on the
preferably consisting of a ring of synthetic rub
ber, such as neoprene', which is normally sub
shaft in the order named, forcing the drive col
lar inwardly against the spring a suiîûcient dis- ' '
' stantially circular in cross section. The cross 30 tance to expose the pin aperture in the shaft, and
permit the drive pin to be inserted `in the latter.
sectional diameter of the ring however, is slightly ,
The pin is then registered within the slot 28 at
the outer end of the drive collar, so that the
parts will be maintained in the assembled rela
of the hole in said ring is slightly Iless than the
exterior diameter of the shaft, so that when the 35 tion shown in Figure l, by the compression of
the spring I4. Said spring serves to drive the
collar and its sealing ring is placed on the shaft
'thrust collar so that the said collar, sealing ring,
the sealing ring will fit snugly on vthe shaft and
spring and drive collar rotate with the shaft,
will be maintained under compression betweenV
while .the thrust collar is maintained in iiuid
the shaft and the surrounding wall of groove I8.
The thrust collar I2 is driven with'the shaft 40 tight engagement with the bearing surface 20 of
through the drive collar I5, and the coil spring _ » the thrust bearing II. The sealing ring i3 pre
vents leakage along the shaft through the thrust
I4 surrounding the shaft and urging the thrust
Y collar into rotatable engagement with the proxi
collar I2.
The parts are easily disassembled in a similar
mate end of the bushing Il. In the form shown
herein, said bushing has a projecting annular 45 fashion by forcing the drive collar inwardly
bearing surface 20 formed thereon for engage
against the spring a sufficient distance to expose
ment with the thrust collar.
the drive pin and permit the latter to be re
. The drive collar» I5 consists of an annular mem
moved from the shaft.
ber, preferably formed of a single cylindrical
It will be especially noted that the hollowed
piece of metal adapted to iit snugly on the shaft, 50 groove I8 of the thrust collar I2 is madel sub
~ >and having a plurality of radially extending ñn
stantially Wider in an axial direction than the
gers 23, 23 (herein 3 in number) formed by bend
normal
width of the sealing ring I3 so as to per
ing partially severed longitudinally extending
greater than the radial depth of the hollowed
, groove I8 in the thrust collar, and the diameter
strips of the cylindrical piece outwardly near vthe . mit expansion of the latter in a longitudinal di
outer end of the latter to provide an abutmenty 55 rection when the sealing ring is maintained under
2,411,509
4
compression between the shaft and the surround
ing wall of said groove.
Although ï have shown and described certain
embodiments of my invention, it will be under
ments, a coil spring surrounding said rotatable
member in engagement with said abutments and
forming a yieldable drive connection between
the latter and said thrust collar, said drive col
stood that I do not wish to be limited to the exact
lar also having another partially severed por
construction shown and described, but that vari
tion disposed in outwardly offset parallel rela
ous changes and modifications may be made
tion to said rotatable member to form an out-`
without departing from the spirit and scope of
wardly opening slot and a drive pin detachably
mounted in said rotatable member and normally
the invention .as deiined in the appended claims.
l claim:
‘
10 maintained in the latter beneath said offset par
l. in a seai for a rotatable member, a relatively `
allel portion of said drive collar under compres
iîxed bearing member, a thrust collar loosely
sion of said spring, but releasable from said slot
mounted on said rotatable member in end-wise
and rotatable member by sliding said drive collar
, bearing engagement with said bearing member,
against the compression of said spring.
a sealing member carried by said thrust collar 15
4. lin a seal for a, rotatable member, a relatively
in duid-tight relation with said rotatable mem
fixed bearing member, a thrust collar loosely
ber, a second generally cylindrical collar slidably
mounted on said rotatable member in endwise
mounted on said rotatable member and provided
bearing engagement with said bearing member,
with an integral radially off-set partially severed
a sealing member carried by said thrust collar
peripheral portion forming an outwardly open
in iluid-tlght relation with said rotatable mem
ing slot, a coil spring affording endwise yieldable
ber, a, second collar slidably mounted on said
thrust connection between said second collar and
rotatable member consisting' of a generally cy
said thrust collar, a drive pin detachably mount
lindrical body formed with a. plurality of out
ed in said rotatable member and normally main
wardly bent partially severed portions in spaced
tained in the latter between said oiîset ‘periph-y
relation adjacent-its outer end to form abut
25
eral portion of said second collar by compression
ments, a coil spring surrounding said rotatable
of said coil spring, but releasable from said pe
member in engagement with said abutments and
ripheral portion and said rotatable member by
forming a yieldable thrust connection between
sliding` said second collar erdwise against said
the
latter and said thrust collar, and means af
' spring,
fording a detachable drive connection between
2. In a seal for a rotatable member, a relatively 30
said second collar and said rotatable member.
ñxed bearing member, a thrust collar loosely
5. In a seal for a rotatable member, a rela
mounted on said rotatable member in endwise
tively fixed bearing member, a thrust collar
bearing engagement with said œaring member,
mounted on said rotatable member in'end
a sealing member carried by said thrust collar in 35 loosely
wise bearing engagement with said bearing mem
duid-tight relation with said rotatable member,
ber, a sealing member carried by said thrust col
a drive collar slidably mounted on said rotat
lar in ñuid-tight relation with said rotatable
able member consisting of a generally cylindrical
member, a second collar slidably mounted on said
body formed with a plurality of outwardly bent
rotatable member consisting of a generally cy
partially severed portions in spaced relation ad
jacent its outer end to form abutments, a coil
spring surrounding said rotatable member in en
gagement with said abutments and forming a
yyieldable drive connection between the latter and
lindrical body formed with a plurality of out
wardly bent partially severed portions in spaced
' relation adjacent its outer end to form abut
ments, a coil spring surrounding said rotatable
member in engagement with said abutments and
forming a yieldable thrust connection between
able drive connection between said drive collar
the latter and said thrust collar, said second col
and said rotatable member.
lar also having another partially severed por
3. In a seal for a rotatable member, a rela
tion disposed in outwardly offset parallel rela~
tively ilxed bearing member, a thrust collar
tion to said rotatable member to form an out
loosely mounted on said rotatable member in
endwise bearing engagement with said bearing 50 wardly opening slot and a drive pin detachably
mounted in said rotatable member and normally
member, a sealing member~ carried by said thrust
maintained in the latter beneath said offset par
collar in duid-tight relation with said rotatable
said thrust collar and means aiïording a detach
' member, a drive collar slidably mounted on said
rotatable member consisting of a generally cy
lindrical body formed with a plurality of out
wardly bent partially severed portions in spaced
allel portion of said second collar under com
pression of said spring, but releasable from said
slot and rotatable member by sliding said sec
ond collar against rthe compression of said spring.
relation adjacent its ,outer end to form abut
PETER ENDEBAK. I
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