close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2122177

код для вставки
Ju'ne28, was. -
-
‘v_ G, KLEIN
’
2,122,177
INJECTOR
Filed May 19, 1937
2 Sheets-Sheet l
4/1/1 l.
RECHARGING
u'r COMPLETED.
'
DISCHARGING
(ZOMPLETED.
June 28, 1938.
v. G. KLEIN
2,122,177
INJECTOR
Filed May 19, 1957
,2 Sheets-Sheet 2
2,122,177
Patented June 28, 1938
UNITED STATES2,122,177PATENT OFFICE
INJECTOR '
- Victor G. Klein,
St. Louis, M0,‘, asslgnor to Lin
coln Engineering Companm-"St. Louis, Mo., a
corporation of Missouri
Application May 19, 1937, Seriai'No. 143,401
7 Claims. (Cl. 184-7)
This invention relates tovinjectors, and with
regard to certain more speci?c features, to in
jectors for pressure lubricating ‘apparatus and
the like.
‘
Among the several objects of the invention
may be noted the provision of an injector for use
in lubricating systems and the like such as de
scribed in the United States patent application
of Lutwin C. Rotter, Serial No. 137,555, ?led April
necessity for an operation of a predetermined in
terval of time.
Referring now more particularly to Figs..2 and
3, the inlet “5 will be seen to be in communica
tion with the body portion 2 I. This body portion
2i carries a valve passage 23 in which is a valve
25. The valve'25 has a head 21 which is exposed
at its end to the pressure entering the connection
15. The valve also has a peripheral recess 29.
A spring 30 normally presses the valve to what 10
10 1'7, 1937 which requires less pressure for its oper ' will be called a re-charging position (shown in
ation. Other objects will be in part obvious and Fig. 2). An alternate or discharging position is
in part pointed out hereinafter.
shown in Fig. 3. The valve carries an indicator
The invention accordingly‘ comprises the ele
stem 3i which extends through an opening in a
ments and combinations of elements, features of cap 33, the latter also serving to hold in place the' 15
15 construction, and arrangements of parts which spring 30.
will be exempli?ed in the structures hereinafter
Sidewardly of the valve, the body 2| carries a
described, and the scope of the application of cylindric chamber 35 which has a clearance 31
which will be indicated in the following claims.
communicating with the valve cylinder 23 by
In the accompanying drawings, in which is i1
means of a port or passage 39. Centrally and 20
20 lustrated one of various possible embodiments ofv axially of the'cylinder 35 is held a stationary cyl
inder M which forms a communicating passage
the invention,
Fig. l is a diagrammatic view showing one type
43.‘ In cylinder 35 and slidably mounted upon
of system to which the invention applies;
the pipe 4| is a piston 45. The piston 45 is packed
Fig. 2 is a vertical section showing the injector both with respect to the pipe 41 and the cylinder 25
in charged position;
35. A spring 41 normally forces the piston 45
2
Fig. 3 is a view similar to Fig. 2 showing the
toward the clearance 31.
injector in discharged position; and,
The piston is one example of means for sepa
Fig. 4 is a vertical section showing an alterna
rating or dividing the chamber 35 into two cham
tive form of injector in charged position.
bers, the sizes of which may be varied by opera 30
Similar reference characters indicate corre
tion of the apparatus. For example, a diaphragm
30
sponding parts throughout the several views of
the drawings.
Referring now more particularly to Fig. 1,
there is shown at numeral I a container for lubri
cant. Associated with the lower and outlet end
35 of the container l is a pump 3 which withdraws
lubricant from the container I and discharges it
to a line 5. In the line 5 is a strainer 1. Said
line 5 also includes a relief valve 9 having a by
pass line H to the container 1. The details and
40
functions of the above parts have been set forth
in said application of Lutwin C. Rotter.
Communicating with the line 5 are injectors
13. The communications are by way of short
branch lines 15. The injectors receive lubricant
45 from the line 5 by way of the branch lines 15.
Each injector l3 has its outlet 11 connected with
a suitable bearing or bearings 19 which are to
be lubricated. All of the above items are shown
50 diagrammatically in Fig. l for the purpose of
showing the use of the specific injector shown in
Figs. 2 and 3.
As shown in said application of Lutwin C.
may be used in lieu of piston 45.
'
It is to be understood that the pipe 4| is only
one example of means whereby the passage 49
may be connected with the spring-side of the 35
piston 45. For example, this may be done by
means of a pipe on the outside of the body 35.
It is also to be understood that other means
besides the spring 41 may be used for driving the
piston 45 to transfer ?uid from one, side thereof 40
to the other. For example, gravity or magnetic
means may be employed. Other mechanical
equivalents may also be thought of .
From the drawings it will be seen that the pas
sage 43, at one (the left) end, connects with the 45
space on the one side (left side) of the piston 45,
and at its other end connects with said valve cyl
inder 23 by means of a port 49. A port 5| con
nects the valve cylinder 23 with the outlet l1.
The operation of the injector is as follows:
50
Starting with the parts in recharging position
as shown in Fig. 2, it may be assumed that there
is no pressure in the line l5. Lubricant has been
forced-from the right side of the piston 45 to its
Rotter, the pump 3 is operated manually or auto- y, left side by reason ‘of the pressure of spring 41, 55
55 matically, as desired, and sends lubricant under
.69
pressure through the line 5. This ‘applies pres
sure to the injectors via the branch lines 15. The
object of the injectors I3 is to permit of forcing
measured charges from them to the bearings 19
simply by operating the pump and without the
this passage being through passage 39, recess 29,
passage 49 and tube 43.
'
Upon operating the pump 3, pressure is en
gendered in said line 15 and, as illustrated in
Fig. 3, this pressure exerted upon the head 21
2
2,122, 17’?
forces the valve 25 up against spring 80. This
piston 45 might be constructed with an area
action causes the head 27 to uncover the port
presented to inlet pressure which is larger‘ than
39 and at the same time causes the recess 29
the area presented to outlet pressure, provided
to connect ports 49 and BI. The charge of lu
bricant which theretofore has become located on
the left side of the piston 45 is now forced
through the tube 88, passages 49, 29, SI and I1,
suitable volume equalizing means be employed
on the small side of the piston. This point is
mentioned in order that it may be clear that the
broader claims herein are intended to cover such
thus lubricating the associated bearing or bear
ings.
a construction.
This is due to ?uid pressure on the right
Furthermore, at Fig. 4 such a construction is
shown. In Fig. 4, like numerals designate like 10
parts. In this case the piston 45 is of the dif
i'erential type having a large end 6| sliding in
side of the piston 65 which enters by way of
passage 89.
After a time, the charge is emptied, and in
asmuch as the space on the right of piston at
no longer expands, the pressure increases (due
115 to continued pump operation) until the relief
valve 9 becomes operative to relieve pressure
a large part 65 of the cylinder 35, and a small
end 63 sliding in a smaller part 61 of the cyl
inder 35. Thus a given pressure at the inlet l5 15
e?’ects a higher pressure in the outlet H, the
through the bypass ii and back to the container
operation being otherwise similar to that above
described.
But, inasmuch as in re-charging, the rate of
i. The relief of pressure is a signal to the op
erator to cease pumping, inasmuch as the meas
20 ured charge has been delivered, or, as shown in
increase of the volume of the cylindric portion 20
671 is smaller than the rate of decrease of volume
of the cylindric portion 65, a by-pass 69 is placed
between the port 39 and the inlet i5. This by
pass has a check valve ll therein which opens
under unbalanced pressure directed toward the
inlet. Prongs '73 at the inlet prevent the head 25
2? of the valve from covering the by-pass port
69. Thus any excess of fluid from the cylin
dric portion 65 which cannot be accommodated
said application, automatic means may be em
ployed for operating and turning off the pump.
Hence, whenever the pump ceases to operate,
the pressure in the inlet i5 drops to a point
where the valve 25) is moved- by the spring 30
to the position of Fig. 2. This causes the port
69 to be cut off from port 55 (Fig. 2) and at
the same time causes the underside of the pis
ton 65 to be connected with the upper side
thereof byway of passages 39, 29, t9 and 653.
Hence, under action of the spring #37, the pis
ton 65 will be driven down from the position
shown in Fig. 3 to the position shown in Fig.
2, thereby recharging lubricant which was on
by the cylindric portion 61 (upon re-charging) 30
is pushed back into the inlet l5 which, at this‘
time, is at a low pressure. When the inlet is
comes back up to a high pressure for ‘delivery
purposes, the check valve ‘ii remains closed and
the right side of the piston to the left side. No
prevents a. direct ?ow to the outlet.
Another difference shown in Fig. 4 over the 35
structure shown in the other ?gures is the fact
that the extension 3i does not pass through the
cap 33. An opening 32 is therefore provided
for permitting air to breathe from behind the
valve 25. It will be understood that in the 4.0
structure of Figs. 2 and 3 the corresponding
substantial amount of lubricant is forced back
into the line i 5, because at this‘ time, and as
shown in said application of Lutwin C. Rotter,
the line is closed off from its} source. Thus it
will be seen that when the pump ceases to op
erate, the spring 67, in association with the pis
ton 55-, causes an automatic recharging of the
measured charge ready for delivery when the - breathing takes place between the clearance of
pump is next operated.
~.
the stem 3! and its bearing in the cap 33.
The counterbore 37 is not in the nature of‘
a di?erential cylinder, because no portion of the
piston is operated therein. This counterbore 3?
is only to insure quick application of themes
sure from the port 39 over the entire periphery
of the piston 37.
'
It should be understood that the operation of
the spring 41 is merely to transfer ?uid into
.delivery position, and that the spring has noth
ing to do with the direct e?ectuation of the out
let pressure. The outlet pressure is engendered
merely by the transfer of pressure from one side
of the piston $5 to the other side.
Among the distinguishing features of the pres
ent injector over that shown in said applica
‘tion of Lutwin C. Rotter is the fact that no diff
ferential piston is ‘used with its small face ex
posed to incoming pressure and its large face
e?ecting outgoing pressure.
‘
By having equal areas on opposite sides of the
piston, a greater outlet pressure may be ob
tained with a given pressure.
In said Rotter application the applied pressure
is over a piston area which is less than the area
which transmits pressure to the delivered ?uid.
Thus in that case, for a given outlet pressure, a
higher inlet unit pressure is necessary.
It is not to be understood that the present
apparatus could not be used with a differential
piston in which the diiferential areas are op
positely disposed from that shown in said ap
plication of Lutwin C. Rotter. For example, a
Another advantage of the present invention
over that .of the said Rotter invention, so far 45
as the injector is concerned, is that the shorter
piston may be used, thus reducing frictional re
sisting e?’ects. Furthermore, the apparatus may
be more economically manufactured, being of
simpler form
It will be understood that the present injector
may be used in any of the systems such as de
scribed in said application of Lutwin C. Rotter,
or in other suitable systems.
In view of the above, it will be seen that the 55
several objects of the invention are achieved and
other advantageous results attained.
As many changes could be made in carrying
out the above constructions without departing
from the scope of the invention, it is intended
that all matter contained in the above descrip
tion or shown in the accompanying drawings
shall be interpreted as illustrative and not in a
limiting sense.
'
I claim:
"
65
1. An injector comprising a body having an
inlet for receiving ?uid under pressure and hav
ing an outlet for delivering ?uid under pressure
and a chamber, a movable dividing means in
the chamber having areas presented to pressure 70
on opposite sides thereof, said body including a
port between said inlet and one side of the divid
ing means and a port communicating between the
outlet and the other side of the dividing means,
valve means traversing said ports and normally 75
v3
2,122,177
biased to one position in which both of said ports
are cut off from the inlet and outlet, said valve
means presenting an area to pressure of the in
let whereby when said pressure rises the valve
means is moved to a position to connect said
ports respectively to the inlet and outlet.
2. An injector comprising a body having an
inlet for receiving ?uid under pressure and an
outlet for delivering ?uid under pressure and a
10 chamber, a movable dividing means in the cham
ber having areas presented to pressure on op
on opposite sides thereof, said body including a
port between said inlet and one side of the pis
ton and a port communicating between the out
let and the other side of the piston, valve means
traversing said ports and normally biased to one
position in which said ports are cut o? from the
inlet and outlet respectively, said valve means
presenting an area to pressure at the inlet where
by, when said pressure rises, the valve means
is moved to a position to connect said ports re
spectively to the inlet and outlet, said valve means
in its biased position forming a‘ communication
posite sides thereof, said body including a port. between said ports to connect one side of the pis
between said inlet and one side of the dividing ton with the other side thereof, and a spring
means and a port communicating between the biasing said piston normally to force ?uid from 15
15 outlet and the other side of the dividing means, said one side thereof to said other side when
valve means traversing said ports and normally said valve means is biased for the purpose, said
biased to one position in which said ports are piston having an ‘area presented to pressure from
cut oif from the inlet and outlet respectively, said said inlet which is at least as__large as its area
valve means presenting an area to pressure at presented to pressure at said outlet.
20
20 the inlet whereby, when said pressure rises, the
_ 6. A lubricant injector comprising a body vhav
valve means is moved to a position to connect said ing an inlet for receiving lubricant under pres
ports respectively to the inlet and outlet, said sure and having an outlet for delivering lubri
valve means in its biased position forming a cant under pressure and a cylinder, a piston in
communication between said ports to connect one the cylinder having areas presented to pressure on 25
side of the dividing means with the other side opposite sides thereof, said body including a port
thereof.
between said inlet and one side of the piston and
3. An injector comprising a body having an in
a port communicating between the outlet and
let for receiving ?uid under pressure and having the other side of the piston, valve means trav
an outlet for delivering ?uid under pressure and ersing said ‘ports and normally biased to one 30
80 a cylinder, a piston in the cylinder having equal position in which said ports are cut off from the
areas presented to pressure on opposite sides inlet and outlet respectively, said valve means
thereof, said body including a port between said presenting an area to pressure at the inlet where
inlet and one side of the piston and a port com
by, when said pressure rises, the valve means is
municating between the outlet and the other side moved to a position to connect said ports re 35
85 of the piston, valve means traversing said ports
spectively to the inlet and outlet, said valve
and normally biased to one position in which said - means in its biased position forming a commu
ports are cut oil from the inlet and outlet re
nication between said ports to connect one side
spectively, said valve means presenting an area - ‘of the piston with the other side thereof, and a.
to pressure at the inlet whereby, when said pres
spring biasing said piston normally to force ?uid 40
40 sure rises, the valve means is moved to a position from said one side thereof to said other side
to connect said ports respectively to the inlet when said valve means is biased for the purpose,
and outlet, said valve means in its biased position said piston having an area presented to pres
forming a communication between said ports to sure from said inlet which is larger than its
connect one side of the piston with the other side area presented to pressure at said outlet, and 45
.1
45 thereof.
relief means communicating between said larger
4. A lubricant injector comprising a body hav
area of the piston and said inlet.
ing an inlet for receiving lubricant under pres
7. An injector comprising a body having an in
sure and having an outlet for delivering lubricant let for receiving?uid under pressure and having
under pressure and a cylinder, a piston in the an outlet for delivering ?uid under pressure and 50
cylinder having areas presented to pressure on a cylinder, a piston in the cylinder having an
opposite sides thereof, said body including a port area presented to pressure at the inlet which is
between said inlet and one side of the piston greater than its area presented to pressure at
and a port communicating between the outlet
the outlet, said body including a port between
and the other side of the piston, valve means said inlet and one side of the piston and a port 55
traversing said ports and normally biased to one -\ communicating between the outlet and-the other
position in which said ports are cut oil.’ from the
inlet and outlet respectively, said valve means
presenting an area to pressure at the inlet where
by, when said pressure rises, the valve means is
moved to a position to connect said ports respec
tively to the inlet and outlet, said valve means in
biased position forming a communication between
said ports to connect one side of the piston with
the other side thereof, and a spring biasing said
piston normally to force ?uid from said one side
thereof to said other side when said valve means
is biased for the purpose.
5. A lubricant injector comprising a body hav
ing an inlet for receiving lubricant under pres- '
70 sure and having an outlet for delivering lubri
cant under pressure and a cylinder, a piston in
the cylinder having areas presented to pressure
side of the piston, valve means traversing said
ports and normally biased to one position in
which said ports are cut off from the inlet and
outlet respectively, said valve means presenting 60
an area to pressure at the inlet whereby, when
said pressure rises, the valve means is moved to
a position to connect said ports respectively to
the inlet and outlet, said valve means in its
biased-position forming a communication be 65
tween said ports to connect one side of the pis
ton with the other side thereof, and‘ relief means
communicating between said greater area of the
piston and said inlet, said relief means compris
inlg i:a check valve opening with ?ow toward the
in e
.
'
'
VICTOR G. KLEIN;
Документ
Категория
Без категории
Просмотров
0
Размер файла
630 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа