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Патент USA US2113519

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April s, 1938.
c. 8. sum "
2,113,519
SLIDING GATE VALVE FOR INTERNAL COMBUSTION ENGINES
Filed Jan. 50, 1937
' , 2 Sheets-Sheet 1_'
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April 5, 1938. ‘
,
c. B. SLOAT
2,113,519
‘ SLIDING GATE VAL'VE FOR INTERNAL COMBUSTION ‘ENGINES
Filed Jan. '30, 1957
2 Sheets-Sheet 2
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Patented Apr. 5, 1938
2,113,519
UNITED STATES PATENT OFFICE
2,113,519
SLIDING GATE. VALVE FOR INTERNAL COM
BUSTION ENGINES
Charles B. vSloat, Hoven, S. Dak.
Application January 30, 1937, Serial No. 123,283
4 Claims. (Cl. 123-188)
This invention relates to sliding gate valves for
internal combustion engines.
One important object of the invention is to
provide a novel and improved arrangement of
5 sliding gate valves for controlling the intake and
to any number of cylinders in an engine, itvbe
ing merely necessary to provide each cylinder with -
bustion engine.
the parts set forth in the present embodiment.
In the drawings there is shown the upper part
A second important object of the invention is
to provide valve means for such an engine wherein
the valves are flat slide valves and work on ?at
or plane surfaces.
sisting of a cylinder body II and a cylinder head
l2. The cylinder body II is of the usual circular 1O
exhaust from the cylinder of an internal com
A third important object of the invention is
to provide a valve arrangement of this class
wherein ?at slide valves are located within a
15 cylinder and work over plane surfaces provided
with intake and exhaust ports.
A fourth important object of the invention is
to provide means whereby internally located slide
valves are operated from outside the cylinder.
A ?fth important object of the invention is to
provide a novel arrangement for holding such
valves closely against the surfaces whereon they
work.
With the above and other objects in view the
invention consists in general of certain novel de
tails of construction and combinations and ar
rangements of parts hereinafter fully described,
illustrated in the accompanying drawings where
in are shown the preferred embodiments of the
invention.
In the accompanying drawings like characters
of reference indicate like parts in the several
views, and:-—
.
Figure 1 is a plan view of the cylinder of a sin
gle cylinder engine embodying the sliding gate
valves in accordance with this invention,
Figure 2 is a side elevation of the upper part
of such an engine cylinder,
Figure 3 is a section on the line 3—3 of Figure 2,
Figure 4 is a front elevation of such a cylinder,
Figure 5 is a section on the line 5-—5 of Figure 4,
Figure 6 is a. fragmentary section on the line
6-6 of Figure 5,
Figure 7 is a section on the line '!-'l of Figure 6,
Figure 8 is a section on the line 8—8 of Figure 6,
Figure 9 is a view of the gate valve separate
from the rest of the structure,
-
Figure 10 is an enlarged horizontal section
through the intake and exhaust ports and their
gate valves and showing means whereby to com
pensate for wear on the valves, and
Figure 11 is a fragmentary detail showing a
55
shown and described is illustrative of its appli
cation to a single cylinder engine, it is to be un
derstood that the valve arrangement is applicable
of a cylinder indicated in general at I0 and‘ con
cross-section and includes an inner or main wall
13 and an outer wall or shell I4 spaced concen
trically from the inner wall to provide the usual
water space l5 common to internal combustion
engines of the Water jacketed type. The walls l3 . 15
and I4 are held spaced at their upper ends by
the usual Webs I6 connecting the walls at cir
cumferentially spaced intervals. Extending out
wardly around the upper end of the wall I4 is a
peripheral ?ange having a rear semi-circular 20
portion I‘! and a forward portion l8 substantially
rectangular in external contour. In this cylinder
body is the usual reciprocating piston l9 provided
with packing rings 2! and with a pin 2|’ for the
upper end of the connecting rod (not shown)
of the cylinder.
_7
The cylinder head l2 has in plan a semi-cir
cular rear portion 22 from each side of which
extends a flat or plane side portion 23 and the
forward edges of these side portions are connected 30
by a flat or plane front portion 24. The front
portion 24 has a horizontal upper edge 25 from
the ends of which the upper edges of the head
sides extend horizontally rearward for short dis
tances as at 26 and then incline downwardly to- 3
ward the rear as at 21. The edges 2‘! connect
‘with the upper edge 28 of the rear portion 22.,’
The top of the head thus has a horizontal front
portion 29 and a downwardly extending rear por
tion 30. The front, sides, rear and top of ‘this
head each has an inner wall 3| and an outer wall
32 spaced from the inner wall to provide a water
space 33. Webs 34 are spaced around the pe
riphery of the lower edge of the bed to hold the
walls 3| and 32 properly spaced and these webs
34 are aligned with the webs 16 so that ports
'are provided for circulation of water between
the water spaces 15 and 33. The lower edge of
the head [2 is provided with a peripheral ?ange '
having a semicircular rear portion 35 and a. for
ward portion 36 of substantially rectangular ex
modi?ed arrangement of the valve actuating
ternal contour, the head ?ange thus conforming
means used herein.
in outline to the body ?ange. The usual gasket
While the embodiment of the invention herein
31 is interposed between the body and head flanges .
2
2,113,519
and the head is secured to the body by ordinary
means such as the bolts 38.
In the ?at front 24 is provided an intake or
fuel port 39 of laterally elongated rectangular
form and a similar laterally elongated rectangu
lar exhaust port 40. The port 39 communicates
at its outer end with an intake casing 4| to which
is bolted or otherwise secured a fuel supply pipe
or manifold 42. The port 40 communicates at its
10 outer end with an exhaust pipe or manifold 43
which is suitably secured to the front face of the
front portion or wall 24. The inner wall 3|. of
the front of the head is provided with vertically
disposed dove-tailed grooves 44 through the bot
toms of which the inner ends of the ports 59 and
49 open. In these grooves are slidably mounted
the dove-tailed valve plates 45 and 46"which con
trol the respective ports 39 and 40. Each of these
valves has a rectangular port 41 which is brought
by movement of the respective: valve into and out
of registry with the port 39 or 40 controlled by
that valve. The portion 48 of each valve above
the port 41' of said valve serves to close the re
spective port 39 or 40 upon the valve being moved
25
downwardly to port closing position. This is well
seen in Figure 8.
Below each voi" the ports 39 and 40 there is pro
vided in the front 24 of the head a Vertical slot 59
wherethrough passes a valve stem '49 suitably at
tached to the respective valve. 1 The slots 50 are of
such vertical extension that movement of the
stems to their upper ends opens‘ the respective
ports 39 and 40 while movement of said stems to
the lower ends of slots 50 closes said ports. The
lower ends of the valve plates 45 and 46 constant
ly cover the inner ends of the slots 50 and thus
prevent escape of gases from the interior of the
head through these slots. On the front of the
cylinder body | | is formed a pair of vertical guides
5| wherethrough pass valve rods or lifters 52.
Each ‘of the rods 52 is provided at its upper end
with a head 53 wherein is secured the outer end
'of a respective valve stem 49. Around each of
the valve stems 49 is arranged a coiled compres
sion spring 54 which bears at one end against a
head 53 and at its other end vagainst a plate 55
slidably bearing against the front 24.
These
gripped so as to prevent leakage of the gases and,
upon the valves being worn, the shims may be
adjusted from time to time to restore the proper
?t for the valves. Further, this arrangement per
mits easy removal and replacement of the gate
valves since the strips 6| and 64 may be removed
by unscrewing the cap-screws» 63 and 61 thus
leaving the valves free for removal and replace 10
ment.
--In Figure 11 there is shown a portion of a cyl
inder ||a and a portion of a head He. This head
has the usual slots through which project the
valve stems each consisting of a larger boss por
tion 49a and a smaller extension 4911. Lifter rod
heads 53?- ?'t on the portions 49b and bear against
the outer faces of the portions 499, being there
held by springs 54a which bear at their inner ends
against ‘the heads 53“ and at their outer ends
against washers 55a _- which are held adjustably
on the portions 49*’ by adjusting nuts 55‘“. Suit
able guide means 5 | a is provided for the stems '52“
of the lifter rods.
The valve ‘rods 52 are operated in the usual
manner common tointernal combustion engines
by a cam shaft having cams thereon arranged
to alternately ‘raise the rods and thus to alter
nately open andclose-the valves. This cam shaft
and its ‘cams being well known it has not been 30
deemed necessary to illustrate these parts. As
the valves are alternately operated the usual four
cycle action takes place, the valve 39 being opened
to admit a charge on the down stroke ‘of the pis
ton and closed as the piston moves upwardly to >
compress the charge which is then fired by a
spark from the spark plug 59. The piston again
descends, the intake valve 39 remaining closed.
During these three movements of the piston the
exhaust valve remains closed. As the piston
moves upwardly for the second time in the cycle
the exhaust valve 40 moves upwardly and opens,
the valve 39 remaining closed. The valve 40 ‘closes
as the piston reaches the upper end of the ex
haust stroke and the cycle is repeated.
There has thus been provided a simple and
efficient device of the kind described and for
springs 54 serve to urge the valves constantly into
close engagement with the valve seats formed by
the grooves 44. On each of the valve rods 52 be
low the guide 51 is a sliding collar 56 held in ad
justed position by a set screw 51. Between each
collar 56 and guide 5| is a coiled compression
spring 58 which thus urges the valve rods down
the purpose speci?ed.
It will be observed that the invention is equally
wardly.
sleeve types. The passage of gas is free and l
unobstructed thereby affording the greatest pos
By this means the valves are also con
stantly urged downwardly to‘close the ports 39
g
sides of the gate valves 45 and 46. By removing
layers of the shims the valves may be closely
and 49.
' In order to provide means for oiling the valves
suitable oil holes 59 (Figures 7 and 8) are pro
vided.
60
In order to adjust for wear of the gate valves
‘the arrangement shown in Figure 10 may be used.
It’ will be seen that the face 60 against which the
gate valves rest constitutes a plane surface. At
each side of this surface is a strip 6| (only one
65 being shown) which has an undercut bevel face
62 against which ?ts one bevelled edge of one
of the gate valves 45, 46. These strips 6| are se
cured against the face 6|! by suitable means such
as is indicated by the bolt or cap-screw 63. Cen
70 trally between the strips 6| is a strip 64 having its
vside edges forming bevelled and undercut faces
65. Beneath the strips 6| and. 64 rest shims 66
of the usual removable type. Bolts or cap-screws
‘61 serve ‘to hold the strip 64 removably in place.
Against the shims rest the remaining bevelled
simple in construction as a poppet valve, yet _
is one that eliminates the objectionable features
'of the poppet valve such as noise and friction.
There is no complicated and cumbersome mech
anism such as is found in valves of the sliding
sible power with the least fuel consumption. The
sliding gate valves operate with oil and are there
fore, oil sealed and devoid of leakage. Since
.the gate valves are inside, the pressure within the
cylinder tends to tighten the contact of the
valves on their seats and thus eliminates leak
age.
It is obvious that changes may be made in the
form and construction of the invention without
departing from the principles involved. It is
not therefore desired to con?ne the invention to
the exact form herein shown and described but it
is desired to include all such .as come within the
scope of the appended claims.
70
What is claimed is:
1. In an internal combustion engine, 2. cyl
inder including a hollow head opening therein,
said head having a flat side wall having its in
ner face provided with a pair of spaced parallel 376
3
2,113,519
dovetailed grooves lengthwise thereof, said wall
being formed with horizontally aligned intake
‘and exhaust ports opening directly into the head
through the bases of said grooves intermediate
the ends of the latter, the sides of said ports be
ing spaced from the side walls of the grooves, and
reciprocatory dovetailed valve plates slidably
mounted in said grooves, and travelling in oppo
site directions in timed relation for alternately
10
controlling the opening and closing of said ports.
2. In an internal combustion engine, a cylin
der including a hollow head opening therein, said
head including a ?at side wall having its inner
face provided with a pair of spaced parallel dove
15 tailed grooves lengthwise thereof, said wall being
formed with horizontally aligned intake and ex
haust ports opening directly into the head
through the bases of said grooves intermediate
the ends of the latter, the sides of said ports
20 being spaced from the side walls of the grooves,
reciprocatory dovetailed apertured valve plates
slidably mounted in said grooves, and travelling
in opposite directions in timed relation for con
trolling the opening and closing of said ports,
25 said walls being formed below said ports with
slots permanently closed at their inner ends by
with horizontally aligned intake and exhaust
ports directly opening into the head through the
bases of said grooves between the transverse me
dians and upper ends of said grooves, the sides
of said ports being spaced from the side walls
of the grooves, and reciprocatory dovetailed aper
tured valve plates slidably mounted in said
grooves, and travelling in opposite directions in.
timed relation for controlling the opening and
closing of said ports.
pair of spaced parallel dovetailed grooves length 15
wise thereof, said wall being formed with hori
zontally aligned intake and exhaust ports open
ing directly into the head through the bases of
said grooves intermediate the ends of the latter,
the sides of said ports being spaced from the side 20
walls of the grooves, and reciprocatory dovetailed
apertured valve plates slidably mounted in said
grooves, and travelling in opposite directions in
timed relation for alternately controlling the
opening and closing of said ports, said means 25
on the inner face of said wall including a pair
said plates, and driven spring controlled guided
of spaced parallel oppositely disposed outer strips
structures for reciprocating said plates, each of
adjustable relative to the said inner face of said
wall having beveled undercut inner side faces
said structures being formed'with a head pro
30 vided with an angularly disposed part extend
ing through a slot and ?xed to a valve plate, and
means on said parts between the valve plates
and head for maintaining the plates in snug
sliding contact with the walls of the grooves.
3. In internal combustion engines, a cylinder
35
including a hollow head opening therein, said
head having a flat side wall provided in and
lengthwise of its inner face with a pair of spaced
parallel dovetailed grooves, said wall being formed
10'
4. In an internal combustion engine, a cylin
der including a hollow head opening therein,
said head having a ?at side wall having its in
ner face provided with means to constitute a
and an inner strip disposed in parallel spaced 30
relation to said outer strips, adjustable relative
to the said inner face of said Wall and having
beveled undercut side faces oppositely disposed
relative to the beveled side faces of the outer
strips, said inner and outer strips coacting to 35
prevent leakage and to compensate for the wear
of the lengthwise edges of said plates.
CHARLES B. SLOAT.
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