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Патент USA US2118367

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May 24, 1938.
H. R. TEAR
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2,118,367
LU'BRICATING DEVICE
Filed Aug. l2, 1956
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2,118,367
Patented May 24, 1938
PATENT oFFicE
UNITED >STATES
2,118,367
LUBRICATING DEVICE
Harry R. Tear, Evanston, Ill., Vassigner to The
Lubrication Corporation, Chicago, Ill., a cor
poration of Delaware
Application August 12, 1936, Serial No. 95,499
(ci. azi-47.4)
5 Claims.
This invention relates Vto lubricating devices
and more particularly to factory filled lubricant
supply cartridges and tol dispensers utilizing such
cartridges.
,
Lubricants of various types have, for some time,
been marketed in factory filled cartridges and the
advantages and desirability `of this method of
handling lubricants are: now too well known to
require furtherdiscussion.
One of the desirable
10 features of cartridged lubricant is that the cus
tomer receives assurance that he is actually re
ceiving the brand of lubricant which he desires
since the manufacturer’s label may be placed on
Y
the cartridge at the time it' is ñlled.
There
15 might, however, be a tendency on the part of
unscrupulous persons to take advantage of the
advertising and prestige »of other better known
manufacturers by obtaining used or empty car
tridges bearing the labels of such manufacturers
20 and refilling such cartridges with their own in
ferior lubricant. This practice would be very
unfair to the original manufacturer and also to
the customer, since the latter would be deceived
into accepting an inferior product.
25
Such unfair practice can be eliminated if the
cartridges can be so constructed that refilling
after once using is impossible, and it is accord
ingly one of the objects of th-e present invention
to provide a. lubricant cartridge `which cannot
3O
be refilled.
=
Another object of the invention is to provide a
lubricant cartridge including a piston having an
opening therein which is normally closed during
original use of the cartridge but which will be
35 opened upon any attempt toi move the'p-iston
rearwardly, as would be necessary to refill the
cartridge.
`
Another object is to provide a piston for a lu
bricant cartridge having a normally closed open
40 ing which will remain closed against a force in
one direction but which will be opened by a force
in the other direction.
'
Still another object is to provide a lubricant
,_ dispenser including a feed screw and a cartridge
having a movable piston with a normally closed
opening in which the feed screw force tends to
hold the opening closed but a force in the oppo
site direction tends to open it.
.
Other obiects, advantages and desirable par
ticular constructions will be apparent from the
following description when read in connection
with the accompanying drawing, in which:
Fig. 1 is a. side view of a lubricant dispenser
55 embodying the invention with parts in section.
¿Fig 2 is a partial central section similar to Fig.
1 showing a diñerent position;
Fig. 3 is a central section of a modified con
struction embodying the invention;
Eig. 4 is an enlarged partial View of the con- 5
struction of Fig. 3; and
Fig. 5 is-a View similar to Fig. 3 of a further
modified construction.
The' dispenser illustrated in Fig. 1 comprises! a
cylindrical barrel or housing which is closed at 10
one end by a permanently attached cap 2 through
which va feed screw 3 extends.
The feed screw 3
is preferably connected to the cap by means of
a quick rel-ease device 4 which may bei operated
to release the feed screw for fre-e axial movement l5
or which may be threadedly connected to the
feed screw. A suitable operating handle 5 is se
cured> to the outer end of the feed screw and
the inner end thereof carries a cup member 6 for
engagement with'a cartridge piston.
2o
The opposite end ofthe barrel I is closed by
means of a detachable head 'I which carries a
lubricant pump formed by a member 8 extending
loosely through the head 1 and having an inlet
stud 9 and a member Il slidably mounted on the 25
member 8¿ and carrying a Ynozzle I2 of any suit
able type. The pump part 8 is rigidly secured to
a connector plate i3 which lies inside of the head
'I and which is formed around its periphery with
a plurality of notches and cam portions for form- 30
ing a bayonet joint with a lubricant cartridge.
The barrel I is adapted to- receive an inter
changeable factory filled lubricant cartridge hav
ing a cylindrical side wall I4 and a ñxed end
closure >l5 formed with a' central outlet opening 35
defined by a spherical wall portion I6 adapted
for sealing engagement with the inlet stud 9.
The forward end of the cartridge side wall has a
plurality of depressed lugs I1 by which the car
tridge may be connected rigidly to the connector 40
plate I3. The opposite end of the cartridge is
closed by a slidably mounted piston I8 having a
central opening therein deñned by an outwardly
turned flange I9. The opening may be closed by
a cap 2l frictionally fitting over the flange I 9 45
and having a reduced portion 22 adapted to- ñt
into the cup» member 6.
To operate the dispenser of Fig. 1, the parts
are iirst assembled as indicated and the feed
screw 5 may then be turned into the barrel to 50
bring the cup member 5 into engagement with the
cap 2l. Further turning of the feed screw will
create a pressure on the piston I8 forcing lubri
cant from the cartridge into the pump part 8.
Thereafter the nozzle I2 may be placed against 55
2
2,118,367
I9 will be closed and there will be no tendency
ed over the edge ofthe flange and a cap member
36 is adapted to fit over the sheet and the fiange
to reinforce the sheet during normal operation.
The cap member is preferably provided with an
annular upwardly turned projection 31 of a size
to fit within the cup member 6, thereby to assure
centering of the cup member 6 on the piston.
The piston of Fig. 5 operates in substantially the
for the cap 2| to be removed.
same manner as those previously described, it be
a fitting and a thrust exerted on the handle 5 or
barrel I in the direction of the nozzle to telescope
the pump parts and thereby to eject lubricant
from the pump. It will be noted that during
Ul operation of the feed screw the thrust exerted
thereby tends to force the cap 2I tightly against
the piston so that the opening through the ñange
ing noted that during normal operation the cap 10
cartridgeI parts when the contents thereof have> 35 reinforces the sheet 35 but that any attempt
been almost entirely discharged and the piston to force the piston rearwardly in a cartridge will
I8 has moved to a position closely adjacent the result in displacement of the cap 36 and ruptur
end closure I5. It will be appreciated that when ing of the sheet 35.
the cartridge is completely emptied the piston I8
While several embodiments of the invention
have been shown and described, it will be ap
will lie in contact with the end closure substan
parent that many changes might be made therein
tially throughout their entire areas so that prac
tically all of the contents of the cartridge will be and it is accordingly not intended to be limited to
dispensed. In order to refill the cartridge it the forms shown or otherwise than by the terms
of the appended claims.
20 would be necessary to force the piston I8 away
20
` I claim:
`
from the closure I5 to its original position either
1. A lubricant supply cartridge comprising, a
by inserting a toolthrough the outlet opening to
force the piston back mechanically or by forcing cylindrical wall portion having a ñxed closure
Fig. 2 illustrates the relative positions of the
lubricant or other fluid under pressure into the
It will be noted from the rela
provided with an outlet opening at one end de
fined by a flange extending into the cartridge, a 25
tive positions of the parts in Fig. 2 that any tool
inserted through the' outlet opening in the wall
I5 would necessarily engage the cap member 2l
piston slidably mounted in the cartridge and
forming a movable closure for its opposite end,
said piston having an opening therein in register
with said outlet opening, and defined by a rear
25 outlet opening.
and a thrust exerted on such tool would cause
the cap member to slide off of the flange I9
thereby leaving an uncovered hole in the piston.
The cap member 2l would be removed similarly
if it were attempted to force the piston back by
means of fluid pressure and it will be apparent
that with the cap member removed it is sub
stantially impossible to force the piston back
cap through the outlet opening will remove the
the manufacturer.
~
Figs. 3 and 4 illustrate a modified piston con
struction which might be substituted for the
piston i8 of Figs. 1 >and 2 comprising a body por
45 tion 24 having a circular periphery adapted to
cap from the piston.
2. A lubricant supply cartridge comprising, a
cylindrical wall portion having a fixed closure
provided with an outlet opening at one end, a pis 40
ton slidably mounted in the cartridge and forming
a movable closure for its' opposite end, said piston
having an opening therein in register with said
outlet opening, a frangible sheet secured over
said opening in the piston to close it, and a rela 45
seal against the inner wall of the cylindrical
tively flat reinforcing member overlying said
cartridge body and formed at its central portion
sheet whereby a thrust on the reinforcing mem
ber in the direction of the outlet opening will
cause it to reinforce the sheet and to force the
with an outwardly extending flange 25 connected
to a similar flange 26 of reduced diameter. The
end of the flange 25 is open to provide a hole
through the piston and may be closed by means
of a sheet 2'! of frangible material such as paper,
metal foil or the like which is cemented to the
flange 25 as indicated at 28. A cap 29 is formed
55 to fit over the flange 26 and down turned edges of
the sheet 2l' and has a radial flange 3| to provide
a seat for the edges of the 'cup member 6. The
central portion of the cap 29 is substantially fiat
and overlies the sheet 21 to provide a reinforce
60 ment therefor against lubricant pressure in the
cartridge. However, if it were attempted to move
the piston rearwardly by means of a tool inserted
through the cartridge outlet opening or by fluid
pressure applied to the cartridge outlet opening,
65 the sheet 2'! would be ruptured and the cap 29
piston through the cartridge and a tool inserted 50
through the outlet opening will rupture the sheet
and force said member away from the piston.
3. A lubricant supply cartridge comprising, a
cylindrical wall portion having a fixed closure
provided with an voutlet opening at one end, a 55
piston slidably mounted in the cartridge and
forming a movable closure for its opposite end,
said piston having an opening therein in register
with said outlet opening, a frangible sheet se
cured over said opening in the piston to close it, 60
and a cap frictionally secured to the piston and
having a relatively flat surface overlying the
sheet to reinforce it, said sheet Yadapted to be
ruptured and said cap adapted to be removed by
a force exerted thereon through the outlet 65
would be forced off of the flange 26 thereby sub
opening.
stantially destroying the utility of the piston and
4. A lubricant supply cartridge comprising, a
cylindrical wall portion having a fixed closure
provided with an outlet opening at one end, a
piston slidably mounted in the cartridge and 70
forming a movable closure for its opposite end,
Said piston having an opening therein in regis
ter with said outlet opening, and defined by a
rearwardly extending circular flange, a frangible
sheet secured over the edge of said flange to close 75
making it substantially impossible to refill a
cartridge successfully.
Fig. 5 illustrates a further modified piston con
struction including a body portion 32 having a
central opening defined by an outwardly turned
central flange 33, the edges of which are rolled
in as indicated at 34 to provide a smooth sur
75
over said first named flange, and a cap frictional
ly fitting over the outside of said last named flange
whereby 'a force exerted on the cap in the di
rection of the outlet opening will urge the piston
through the cartridge but a force exerted on the 35
wardly in the cartridge. Thus this construction
makes refilling of the cartridge a substantial im
possibility and insures that the contents of the
40 cartridge are those originally placed therein by
70
wardly extending circular flange adapted to fit
face. A sheet of frangible material 35 is cement
2,118,367
the opening, and a cap frictionally fitting over
said ñange and having a relatively flat surface
overlying the sheet to reinforce it.
5. In a lubricant cartridge, a piston compris~
5 ing, a circular body formed around its periphery
for sealing engagement with the cartridge side
Wall, said body having a central opening deñned
A
~
3
by an outwardly turned flange, a frangible sheet
secured to the edge of the flange and closing the
opening, and a cap frictionally ñtting over the
flange and having a relatively ñat surface over
lying and reinforcing said sheet.
HARRY R. TEAR.
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