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Патент USA US2406445

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Aug- 27, 1946-
Filed June 2'7, 1945
727;_ 5.
[72 0'62? for
Patented Aug. 27, 1946
Charles L. Thompson, Oakland, Calif.
Application June 27, 1945, SerialVNo. 601,731
3 Claims.
This invention, a bearing removing tool, is an
(Cl. 29-—283)
improvement over the tool disclosed in my co
‘the top surface of the bearing :so that .the. ex
pending application Serial No. 567,823, ?led De
the bearing and coincidently reform the extrac
cember 12, 1944, in that the legs on the thrust
plate are adjustable at will relative to the axis of “
the retracting member so that bearings and bush
ings can be extracted from elements such as ?y
wheels having a broad reaction surface or from
tractor member of the tool can be retracted from
tor to its original form previous to expansion. ,
' In' describing the invention reference will be
made to the accompanying drawing, in which:
Fig. 1 is a top plan view of the invention.
Fig. 2 is a side elevation of the invention shown
relatively thin sleeves, and also, so that the bear
partly in section and showing the legs adjusted
ing can be extracted from its housing and the‘ 10 for extracting the expandible element of'the tool
legs ofrthe tool then adjusted to cooperate with
from the bearing'after extraction of the‘bearing
the bearing so that the bearing can be forced off
from its socket.
of the expandible element of the tool.
Fig. 3 is an underside view of one of the legs.
With this arrangement, bearings of different
‘Fig. 4 is a diagrammatic view showing'adjust
diameters can be removed from relatively thin?
ment of the legs for a bearing of lesser diameter
sleeves or relatively broad housings, with the legs
vand mounted in a sleeve with relatively thin walls.
of the tool adjustable for the most satisfactory
. Fig. 5 illustrates a modi?cation of the adjust
After the bearing, particularly a ball or roller
ing means for the legs and the meansfor secur
ing the legs in their adjusted, position.
bearing, is removed by this tool, the bearing re 1 20' The bearing extractor is' fully disclosed in the
mains on the extractor, and because of the pre
previously mentioned application and therefore
vious expansion‘of the extractor to grip the bear
is not shown or described in detail in this ap
ing, the extractor does not readily return to its
plication, but consists of an expandible member
original form so that considerable ‘di?iculty is
I0 consisting of a relatively. thin sleeve longi
i encountered in removing the bearing from the‘ 25 ‘tudinallyslotted as indicated at II and termi
tool. With this new arrangement, the thrust
members or legs can be adjusted to cooperate
with the bearing, the tool can then be operated
to extract the extractor from the bearing and
nating at its lower end in an annular shoulder
I2v and at its upper end is formed integral with
the threaded sleeve I3 which operates in a
threaded bore in the thrust plate I4 and has a
coincidently return the expandible elements of? 30 head I5 for adjusting the threaded sleeve within
the extractor to their original positions, thus re
the threaded bore. The expanding member I6
forming the extractor.
has its ‘upper portion threaded to cooperate with
The objects and advantages of the invention
‘a threaded bore in the sleeve l3 and its lower
are as follows:
end I‘! is convergently tapered to‘ cooperate with
First, to provide a tool with which burnt-out, 35 a taper bore at the lower end of the sleeve I I,
burnt-in, or worn ball bearings and the like can
be rapidly and conveniently extracted from con
ventional housings including even relatively thin
so that when the member I6 is screwed down
it expands the lower end of the sleeve II and
forces the annular ring I8 outwardly under the
ball bearing I9 as indicated in Fig. 2.
Second, to provide a tool as outlined with an 40
By backin’gup: the screw I5 with the legs 20
adjustable thrust element which can be adjusted
thrusting against the face of the housing 2 I, the
within limits to any desired diameter for cooper
bearing is extractedfrom its socket.
ation with relatively broad or narrow surfaces
It was found that because of non-adjustability
surrounding the bearing recess.
of the legs relative to the axis of the extractor,
Third, to provide a tool as outlined with a 45 that the device was satisfactory only under con
thrust plate, and legs adjustable relative to the
ditions where the bearing, was small enough to
axis of the tool so that the tool can be used
fall Within the inside edges of the legs, ‘and, with
to extract a bearing from its socket and there
bearings of relatively small outside diameter, if
after, with adjustment of the legs, extract the
the surrounding surface was sufficiently wide for
extractor member of the tool from the bearing. 50 cooperation with the’ legs, therefore with small
Fourth, to provide a tool as outlined with a
outside diameter bearings and a thin mounting
thrust plate and legs adjustable to two positions,
sleeve, the device would not properly span the
in one of which the legs cooperate with the sur
structure, and also, after a bearing was extracted,
face surrounding the bearing to be extracted,
difficulty was encountered in removing the bear
and in the other of which the legs cooperate with 65 ing from the collet, and it was to overcome these
disadvantages that the present improvement was
can be made within the limits of adjustment of
the legs, and the bearings can be forced o? the
tool following extraction'and by the same means.
I claim:
1. In a bearing extractor having a thrust plate,
legs adjustably mounted in said thrust plate for
This invention consists in making the legs 20
adjustable at will relative to the axis of the ex-’
tractor, so that they can be adjusted for any
‘ ~ arrangement or size of bearing and socket wall
within the limits of adjustment, and also pro
vide two functions for the legs, ?rst that of
absorbing the thrust for extraction of the bear
ing from its socket, and thereafter, to act as a
adjustment relative to the axis of the extractor
and adjustable at will for cooperation with the
surface of the bearing housing irrespective of its
width or the‘ outside diameter of the bearing
thrust against the bearing to force the bearing
within the limits of adjustment, and in which
said thrust plate has three equi-angularly spaced
off the extractor, and which coincidently reforms .
the extractor to substantially its original.diam-‘
eter so no di?iculty will be encountered with in;
sertion in the next bearing to be extracted. As
‘ Thus, with the same tool, bearing extractions ,
bores each with a co-axial counterbore, and each
leg consists of a disc rotatably fitting in the
counterbore and having a shaft extending from
will be understood, the same size of screw I5 can
one face through the bore and threaded at its
be used, it being merely necessary to change the
terminal end, and a leg eccentrically projecting .
diameter of the collet for ball bearings and the
from the opposite face, whereby rotation of the
like of different internal diameters, so that only
shaft ‘and disc adjusts the span between the
the member [5 need, be changed, all of the other 20 legs;
nut for each shaft'and having a lever
parts including the screw I6 being used for all
arm for adjustment thereof, and a lever arm for
bearings within thelimits of the tool.
veach shaft for adjustment of the leg.
In its simplest form, the leg adjustment is pro
2. A thrust member for a bearing extractor
vided through eccentrics. The leg 26 is secured
comprising; a plate having an axially mounted
to or formed integrally with the disc 22 and is 525 extracting element; three equi-angularly-spaced
eccentrically located on the lower side of the disc,
bores formed through said plate and each having
7 while a shaft 23 projects axially from the upper
a co-axial counterbore formed inwardly from
surface and terminates in a threaded end 25
the under face of the, plate, and a leg for each
‘ for cooperation with a nut 26 for securing the leg
bore and consisting of a disc member rotatably
in adjusted "position
?tting in the counterbore and having its upper
screw driver slot for adjustment. The shaft 23
face seating on the bottom of theco'unterbore
operates'in a‘ bore. 27 which terminates at its
and having a shaft rotatably ?tting in the bore
lower end in a counterbore 23 with the disc 22
and extending‘ upwardly through the plate ‘and
seating on the‘ bottom 29 of the counterbore.
terminating in a threaded portion, and ,a leg pro
Thus, ‘for extracting the bearing, the nuts 261
jecting eccentrically from the lower face of the
are loosened, the legs 25 are adjustedto seat on
disc, and a nut for said threaded portion,rwhere
the surface of the housing 2| as indicated in
by upon loosening the nuts the span of ‘the legs
dotted lines at 20' and 2 I ’, the, screw I5 is screwed
can be individually vadjusted through manual
down until the collet I8 projects through the v4:0 operation of the eccentric legs for cooperation
bearing IS, the screw‘ I5 then screwed down until
with selected support points for retraction of
the collet ?rmly engages the bearing, the screw
bearings, and, for retraction of the extractor from
I5 then screwed upuntil the bearing is completely
the bearing at will,_ said disc members provid
retracted from its socket, which leaves the bear
ing broad ‘supporting surfaces for rigid‘securing
ing hanging on the collet.
45 of the legs to'the plate in any adjusted position.’
The screw I6 is then retracted and the screw
l5 advanced su?‘iciently so that the legs can be
adjustedrinwardly to cooperate with the bearing
as indicated in Fig. 2 after which the screw I5
is again retracted, extracting the collet‘ from the
3. A thrust member for a bearing extractor
comprising; a plate having an axially mounted
extracting element; three equi-angularly spaced
bores formed through said plate and each having
a co-axialcounterbore formed inwardly from one
bearing, and which coincidently springs the ex
face of the plate, and a leg for each bore and
pandible member back to its original relation. ‘
consisting of a disc member rotatably ‘?tting in
‘As illustrated diagrammatically inFig. ll, with
,counterbore and having a shaft rotatably
a bearing of lesser outside diameter mounted in
?tting in the bore and extending through the
a relatively thin sleeve, the legs would have to be
plate and terminating in a threaded portion, and
initially adjusted to some intermediate position 55 , a leg projecting eccentrically from the "opposite
to seat on the top surfaceof the sleeve.
face of the disc, and a nut for said threaded
A modi?cation of the adjusting and securing
portion, whereby the span‘ of the legs can be
means for the legs is illustrated in Fig. 5. A
adjusted at will ‘for retraction of bearings, and,
lever 30 is ?xed in the nut SI, and another lever
for retraction of the extractor from the bearing, 7
32 is ?xed in the upper end of the screw 25, 60 a lever arm for each nut for adjustment thereof, '
and a stop pm 33 is ?xedin the nut to co
operate with the lever .32. In the position shown,
and a second lever arm for. each threaded por- _
tion for eccentric adjustment of the leg, and a
the nut is free so that the leg can be adjusted
stop member on saidnut for limiting the rel- .
to any position by moving the lever 32 if the ad
ative {movement of the nut and the shaft to that
justment is clockwise, and by lever 35 if the ad 65 necessary
for freeing the nut suf?ciently to per
justment is counterclockwise, then when the leg
of the shaft and disc in the re
is in proper position it is merely necessary to
force the lever’ 30 toward lever 32 to secure the
leg in adjusted position.
spective bore and counterbore.
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