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Патент USA US2114240

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April 12, 1938.
E. B. SHARRARD
2,114,240
ENGINE ATTACHMENT
Filed Oct. 4, 1957
- 2 Sheets-Sheet l
Inventor
E 5. 5/19/99790
.4 iiorneys
7 April 12, 1938.
E. B. SHARRARD
2,1 14,240
ENGINE ATTACHMENT
Filed Oct. 4, 1937
2 Sh'eets—Sheet 2
Attorneys
2,114,240
Patented Apr. 12, 1938
UNITED STATES PATENT OFFIEE
2,114,240
ENGINE ATTACHMENT‘
Elwyn B. Sharrard, Royal Oak, Mich.
Application October 4, 1937, Serial No. 167,267
3 Claims. (01. 123-119)
This invention relates to an attachment for
internal combustion engines and has for its pri
mary object to provide for the formation of a
vacuum within the crank case for holding the
oil in the case from passing upwardly past the
piston rings, gaskets, etc., and also for conducting
the fumes from the crank case of the engine to
the intake manifold and the invention together
with its objects and advantages will be best
10 understood from a study of the following de
scription taken in connection with the accom
panying drawings wherein:
Figure 1 is a view illustrating the application
of the invention.
Figure 2 is a top plan view of the device.
Figure 3 is a sectional View through the device
per se.
Figure 4 is a top plan view of the structure
shown in Figure 3 with the threaded cap thereof
2 O removed.
Figure 5 is a perspective view of the valve mem
ber and
Figure 6 is a fragmentary detail sectional view
illustrating a replacement of plate assembly to be
hereinafter more fully referred to.
Referring to the drawings by reference nu
merals it will be seen that in accordance with the
present invention the usual breather pipe of the
internal combustion engine is dispensed with and
substituted therefor is a breather pipe 5 having
an end 6' which ?ts snugly within the opening ‘I
provided in the wall of the crank case 8 as is
2
conventional.
At the upper end thereof the breather pipe 5
is formed to present a socket or boxing 9 and a
stop shoulder ID at the bottom of the boxing 9.
For the boxing 9 there is provided a cap I I in
which ?ts a gasket I2 that rests on the upper
edge of the wall of boxing 9.
40
For the breather pipe 5 there is provided a cap
assembly indicated generally by the reference
numeral I3.
The cap assembly, as best shown in Figure 3,
comprises a tubular portion I4 that ?ts snugly
within the boxing 9 and at its lower edge rests
on the shoulder I9. At the lower end thereof the
tubular member I4 is provided with a screen I5.
In this connection 'it will be noted that the cap I l
for the boxing 9 is welded or otherwise secured to
30 the periphery of the cylinder I4 so as to seat on
the upper end of the wall of the boxing when the
lower end of the tube I4 is seated on the shoulder
l0.
At the upper end thereof the tubular member
I4 is provided with a diametrically enlarged valve
casing or housing I6, and the upper end of the
member I4 projects inwardly beyond the bottom
I’! of the valve casing I6 to support a valve seat
I9.
Adapted to engage the underside of the seat l8
and opening inwardly of the tube I4 is a disk
valve I9 equipped with a stem 20.
Engaging the top‘ side of the valve seat I8 is a
bar 2| that is suitably apertured to accommodate
the valve stem 20. On the upper end of the valve 10
stem 29 is a nut 22 against which impinges one
end of a coil spring 23 disposed about the stem 29.
The lower end of the spring‘ 23 bears upon the
bar 2! and spring 23 thus acts to normally engage
15
the valve disk I9 with seat I8.
Arranged within the casing I6 is a valve cage
24 that consists of a pair of substantially U
shaped spring members which at the closed ends
of the Us are crossed and riveted or otherwise
secured together as at 25, the legs of the U mem
bers forming the cage 24 resting on the bottom
I‘! of the casing I6 as clearly shown in Figure 3.
For the valve casing Hi there is provided a cap
25 which threads onto the casing as shown in
Figure 3 and in the crown thereof the cap 26 is
provided with an opening 21 across which is dis
posed a screen 28.
Tapped into the wall of the cylinder I4 ad
jacent the upper end of the latter is a valve cas
ing 29in which is threaded a needle valve 30 that :10
controls communication between passage 3| of
the valve casing 29 that opens into the cylinder
I4 and a passage 32 formed in the branch 33 of
the casing.
Connected with the branch 33 of the casing as
at 34 is a pipe 35 which at its other end is suit
ably connected with the intake manifold (not
shown) of the internal combustion engine.
Needle valve 30 will thus regulate the amount of
vacuum to be utilized in drawing the fumes from 40
the crank case through the breather pipe 5, mem
ber I4, passages 3|, 32 and conduit 35 into the
intake manifold of the internal combustion en
gine.
When the vacuum becomes excessive, valve I4, 45
against the action of spring 23, will move down
wardly off of its seat I8 so that air from the
atmosphere will then be drawn through the
screened opening 2'! past the valve seat I8 to mix
with the fumes being drawn from the crank case, r
and thereby pass with the fumes through the
valve 29 and the conduit 39 to the intake mani
fold of the internal combustion engine. As the
vacuum decreases valve I9 will move into engage
ment with its seat I8.
55
2
2,114,240
Manifestly tension of the spring 23 may be
adjusted by adjusting the nut 22 on the stem 20
of valve l9.
member, a valve seat at the junction of said
tubular member and valve case, a spring press-ed
As is‘ well known some types of internal
bustion engines are provided in the engine
thereof with a ventilator passage that at its
end opens into the crank case and. at its
and normally yieldably engaging said seat, ‘and
com
block
inner
outer
end opens into the engine block where it is con
nected to an oil outlet ventilator tube. When
using my invention with such type of internal
combustion engine I provide, as shown in Figure 6
wherein a portion of the engine block is illus
trated and designated by the reference numeral
36 while the passage therethrough is indicated
by the reference numeral 36’, and the opening
for the passage to which the ventilator tube is
connected is indicated by the reference numeral
36a, a closure plate 3'! to be substituted for the
aforementioned oil outlet ventilator tube. This
plate 31 is secured in closing position relative to
the opening 36a through the medium of a cap
screw 38 which threads into the engine block 36,
passing through an opening in the plate 31.
Interposed between the plate 31 and the engine
block 36 is a copper gasket ring 39. Interposed
between the plate 37 and the head of the cap
screw 38 is a cop-per gasket ring 40. The purpose
of so closing off the passage 36' in this manner
30 is to insure the creation of the desired vacuum
within the crank case when my invention is as
sociated with the breather pipe of such types of
engines as just above referred to.
It is thought that a clear understanding of the
35
construction, utility, operation and advantages of
an invention of this character will be had with
out a more detailed description.
_
Having thus described the invention what is
claimed as new is:—
1. In an attachment for internal combustion
engines, a breather pipe for the crank case of
such engine, said breather pipe having an upper
end presenting a diametrically enlarged boxing,
a tubular member having a snug ?t within said
11,)
boxing, said tubular member being provided with
a valve case at the upper end of the tubular
valve opening inwardly of said tubular member
a vacuum regulating valve including a casing
having a part tapped into said tubular member
and a branch adapted to be connected by tubing
with the intake manifold of an internal combus
tion engine.
2. In an attachment for internal combustion 10
engines, a breather pipe for the crank case of
such engine, said breather pipe having an upper
end presenting a diametrically enlarged boxing,
a tubular member having a snug ?t within said
boxing, said tubular member being provided with
a valve case at the upper end of the tubular
member, a valve seat at the junction of said tubu
lar member and valve case, a spring pressed valve
opening inwardly of said tubular member and
normally yieldably engaging said seat, and a
vacuum regulating valve including a casing hav
ing a part tapped into said tubular member and
a branch adapted to be connected by tubing with
the intake manifold of an internal combustion
engine, said tubular member at the lower end
thereof having a screen disposed across said end,
and a cap for said valve casing provided in the
crown thereof with a screened opening.
3. In an internal combustion engine, a breather
pipe having a boxing formed at one end thereof, 30
a tubular member having a snug ?t within said
boxing, an inwardly opening spring pressed valve
at the upper end of said tubular member, and a
regulating valve including a casing having an
end portion extending into said tubular member 35
through the peripheral wall of said member and
a lateral branch adapted to be connected by
piping with the intake manifold of an internal
combustion engine, said end of said casing and
said branch being bored to provide a substan- i3‘
tially L-shaped passage, and a needle valve
threadedly engaged Within said valve casing for
controlling said passage at the angle between the
branches of the L-shaped passage.
ELWYN B. SHARRARD.
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