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Патент USA US2404543

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July 23, 1946.
Filed June 22, 1945
SS‘neets-Sheet 1
ieri?'iaa5nar '
July 23, 1946- I ‘ I
Filed June 22,‘ 1945
s sheds-Shea 2‘ _'
Jun}! 23; 1946»
Filed June 22, 1945
5 sheets-sheet 3
‘q- x4- w 56
Patented July 23, 1946
2,404,543 ‘
Robert Steabner, Detroit, Mich.
Application June 22, 1945, Serial No. 600,954
l Claim.
(Cl. 123-51)
This present invention relates to internal com
bustion engines of the type in which two pistons
in a single cylinder move away from one another
when the fuel charge explodes. The connecting
rod of either piston is coupled at the outer end
wardly (‘Figure 1). The front portion of the top
wall has a vertical ?ange ll extending parallel
to the ?ange 9 and said ?anges 9 and H being
disposed to intersect with ?anges I2 of the slop
? ing side portions. These ?anges have upper edges
?ush with one another vto define an opening for
a part of the engine to be described and are pro
to an end of an oscillating lever the other end
of which is connected by a coupling rod to one
vided with bolt holes.
of the crank portions of agcrankshaft.
An engine block I3 is secured in the opening
The object of this invention is the design of an
engine which comprises a minimum number. of 10' 2 within the ?anges by bolts l4 inserted in the holes
of the ?anges and threaded in bosses l5 (Figure
parts that may be produced at low cost and
1). The latter are formed at the lower ends of
replaced with a minimum of effort.
a pair of inclined walls l6 whichconverge up
It is another object of the invention to design
wardly. At the top end of these walls are bosses
an engine that does not rely on the momentum
of its moving parts to carry through the dead 15'i I1 with threaded sockets for screw bolts I8 also
With these and other objects in view as will
appear as the invention is understood, the same
resides in the novelty of. construction, combina
tion and arrangement of parts described in the
following description and claimed in the append
ed claim. The description should be read in con
nection with the accompanying , drawings in
Figure 1 is a vertical, section through the longi
tudinal axis of the cylinder of the preferred em?
bodiment of my invention;
Figure 2 is a horizontal section on line 2-—2 of
passing through apertures in a closure plate IS.
The intermediate portion of the latter has two
openings 20 aligned along the longitudinal axis
of the entire engine.
Through the left-hand (Figure 1) opening ex
tends the intake pipe 2i and through the right
hand opening extends the exhaust pipe 22, both
shown in dotted lines. The lower and inner end
of the intake pipe is threaded into the left-hand
' portion of the top wall 23 of a valve casing 24,
the front wall 25 of which forms a lower portion
of the front wall of the engine block. The, en
tire valve casing is symmetrical about a trans
“ verse vertical plane indicated by the section line
Figure 3 is a central vertical section on line 30" 3—3 of Figure 1 and theddescription of the left
Figure 1;
3—-3 ofFigure 1;
Figure 4 is a detail plan view of the central
portion of the crankshaft and the coupling rods
hand half of the casing and associated parts
which commenced in this paragraph will be con
tinued with the understanding that the right;
pivoted thereto as viewedfrom the plane indi
‘ hand half oi such casing is a duplicate of the
cated by section line 14-4 of Figure 1;
"deft-hand half except as otherwise stated. The
casing has transverse end Walls 26, and interior
Figure 5 is an enlarged detail view of the rocker
or rear wall 21, a pair of parallel intermediate
partitions 28 (Figure 1) and a bottom wall formed
by a portion of the cylinder still to be described
In the drawings in which like reference char
I acters designate like or similar parts, numeral 2 40 ‘t (Figure 3). The intake pipe communicates with
indicates in general a- housing, including parallel, '
the chamber bounded by the left-hand end wall
and partition and portions of the front and rear
vertical endwalls 3 and a bottom wall 4 compris
walls. The left-hand end wall has on either side
ing inwardly inclined sections and sump 5'10
centrally located bosses 29 with an aperture for
cated between the inner and lower sides of the
between the connecting rod of the piston and the
coupling rod of the crankshaft. ‘
bottom sections‘and intended to collect the oil.
the stem 30 of a valve 3!.
The latter has a con
ventional bevel on its peripheral margin and is
seated in a correspondingly beveled opening in
front wall 6 which merges at its lower end into
an inclined sump wall and has a slightwinward
the left-hand partition. The opening of the valve
slope at the upper end (Figure 3) .‘ The rear wall
places the chamber described in communication
‘I has aicentral portion>8 which is outwardly off 50 with the explosion chamber between the partiset with respect to the remainder and slopes near
tions and below the same to be dealt with later.
The intake valve stemhas a portion extending
the upper end slightly inwardly and terminates
beyond the outer side of the left-hand end'wall
at that end in a vertical ?ange 9. The top wall
26 and carries a transverse‘piny32 in the outer .
ill consists of a ?at horizontally disposed front.
The housing also ‘includes a substantiallyvertical _
portion (Figure 3) and side portions sloping out
end of that portion. The latter is surrounded by
2,404,543 ‘
a coil spring 33 bearing with one end against th '
pin and with the other end against the exterior .
boss formed on the outer side of that end wall
and normally holding the valve to its valve seat.
From the intermediate portion of the bottom
wall 34 of the engine block rises a fulcrum post p
35 which includes a horizontally extending sleeve
35. A fulcrum pin 37 is journaled in the sleeve
‘ i and extends beyond either endrof the same (Fig-7
the housing. Each rocker consists of an inter
mediate part 65 having two arms and two outer
parts 66 each representing an arm equal in length
to an arm of the intermediate ‘part. The outer
parts extend in opposite directions and are con
nected by sleeves 61 to the intermediate part.
The sleeve receives the shaft 63 and spaces the
outer parts from the intermediate part.
7 A pin 60 described is mounted in registering
ures 1, 3). ‘ Upon the front end portion of such 10 apertures formed in the free endof one outer
pin is secured a normally downwardly extending
part and of one arm of'the intermediate part of
arm 38 which has in the lower portion of the . a rocker (Figure 2). These parts form the lower
side facing the valve stem a groove 39 receiving
arm of each rocking lever. Figure 2 shows that
the outer rounded end of the latter and which»
the lower armof the left-hand rocker is nearer
opens the valve at the proper time. The rear 15 the front wall of the housing and that the cor
end portion of the fulcrum pin projectingberesponding arm of the right-hand rocker is near
yond the rear end of the sleeve is secured to an
er" the rear housing wall. The upper arms of
arm 4t extending upwardly and towards the valve
theserrockers still to be described are aligne
casing and provided upon the upper end portion
with one another.
of the side facing that casing with a groove 4|. 20
Figure 1 shows that the straight line connect
Into. the groove 4| extends the upper rounded
ing the pivot axis of the lower rocker arms in
end; of a rod 42 which is disposed, in an inclined
the position shown ‘lies above the axis of the:
position (Figure 1) and is guided in an inclined
crankshaft. This construction avoids a dead
openingformed in a 111% 43 extending from the
center ‘position, since the angle included by the‘
inner side of the rear ,wall of the engine block 25 coupling rod and the crank section connected.
and inIthe bottom wall. of the latter (Figure 3).
thereto is less than a straight angle.
The. portion of the rod below the bottom wall is
The coupling rods rotate the crankshaft and
encircledby a coil spring it. bearing with its
receive their motionby apin Bil which is mount.
upper end against the lower side of the bottom'
ed in the free end of the other arm of the inter
wall and with its lower end against a washer 4'5
mediate part and of the other outer part. Each
iixed on the rod.
of such pins 60 is journaled in journal ends 56,
.H'Inthe right-hand portionof the valve casing
51, 58, similar to thejournal ends on the coupling
to right of the section plane 393. is an exhaust
rods and each mounted on the outer end of a
valve and valve operating mechanism both of
connecting rod ‘68. The other end of eachv con
' which are duplicates of? the structure just de; 35 necting rod pivoted. by a wrist pin 20' on to a
scribed" including the intake valve and the mech
piston 69 which carries rings 10.
anism fol-‘operating the same. The exhaust valve
'Both pistons are disposed for motiontowards
and mechanism for operating the samerare there->1
or from one another in a horizontal cylinder 1B.
fore designated by numerals identical with those I The upper portion of which has been described
used for indicating. the intake valve. and the: 40; as, housing part. of thebottom of the valve-cas
mechanism for operating the same.
ing (Figure 1). This upper. portion has an opensv '
The two rods for operating ‘the intake'and ex
ing 'lii whereby communication is established be
haust valves converge downwardly and'have low- ‘
tween the space. in. the valve casing bounded by
er rounded endswhich are engaged. in succession .
the two valves and the top wall of thevalve
by a‘ pair of cams 48 formed on the forward end 45 casing and. the interior of the cylinder. The
oila shaft 41'; . It is understood that the successive
space de?ned and the interior‘ of the cylinder
operation of ‘the intake and exhaust Valves are
between the inner portion ends functions as an
timed in’ synchronization with‘ the operation of
explosion chamber.
- r
A portion of the cylinder is surrounded by a
~ The shaft 13?, is journaledin the rear'wall» of 50 wall. 12 spaced from the cylinder to form there;
1. the housing and bearing. plate d8 attached to the
with a water jacket for cooling the cylinder.» The
inner side of'the latter and has a head 49 bear
latter is supported .by horizontaltransverse braces ‘
ing against the outer side of the rear wall. Fixed
'73 which rest with‘ their outer ends upon the
‘ upon the-shaft between the. cam structure and
hearing plate is a'driven gear 50 which meshes 55
at‘ritrsloweri side with a‘smaller gear 5i ‘rigid
‘7 upon'the crankshaft 52. The latter is journaled
bearing plates described. 7
The foregoing’ description describes an engine’
symmetrical about the; section plane 3-3.'
The engine is started'by a conventional- start—
. in bearing plates 48, each attached to the inner
ing motor (not shown) from ‘any: position,
side of the front or rear housing wall respective
Figures 1 and 2 show the pistons in extreme
ly, and extends outside of the same. The crank 60 inner' positions. The space between the inner
shaft has two. cranked sections 53 (Figure 4)
ends of the pistons is ?lled with the charge‘which
which havecylindrical portionsY54 journaled in
thejournal ends of coupling rods 55,
has been admittedthrough the intake valve. As
The jour- .
‘ nal- ends ‘consist each of a semi-cylindrical half
soon as the latter closes“ the charge is‘ exploded
by the ignition (not shown) andthepistons move
Bi'i'integral with'the coupling rod and a semi 65 away from one another. This motion is trans-~
,mitted- by? the connecting rods which swing’ the
‘ cylindrical half El secured by a bolt 58 to the
‘ ?rstirnenticned half. 'The coupling ‘rods extend
upper'arms of the rockeroutwardly. Thezcoim‘
3 in- opposite directions and'have-upon ‘their re
cident inward motion ‘of the-loweriarm ‘of-the
1 moteends- journal portions 159 in which pins '65} ‘ '
. Rocking
I levers
(Figures 3, (3)
are each,
‘ splined by keys 62 upon a. shaft 63 extending
‘ parallel tothe crankshaft and journaled'at the
1 ends-‘in bearing platest?‘ attached to the inner
rockersicauses‘the- cranked section of the crank--'
70. shaft torotate a quarter turn attheend of which
the crank sections occupy apos'ition slightly in- clinedto thevertical. 'Now the exhaust valve- is‘
opened. by the cam structure described-and kept.
open duringv the ensuing inward.‘ strokeof’the.
‘ sides of? the front ‘and. rear walls respectively .:of 7: pistons which force goutwardly through. the" ‘ex, y.
haust valve the products of the previous com
bustion between the inner ends of the piston
and the exhaust port. The latter closes as the p
cam shaft is rotated and the inlet port is opened
by one of the cams and a charge is drawn into
the cylinder. This charge explodes at the begin
the frame, a cylinder in the engine block, inlet
and exhaust valves normally closed in the engine
block above the cylinder, a pair of pistons in
the cylinder, a pair of connecting rods, each con
nected to a piston, a pair of rocking levers piv
oted in the frame and each having one arm
ning of the next quarter turn. This cycle is re
connected to a_ connecting rod, a pair of coupling
peated. The broad idea of my invention, as de
rods each connected to the other arm of a lever,
?ned in the appended claim, may of course, be
a crankshaft journaled in the frame and having
carried out in structures varying from that here 10 a pair of cranks each connected to the other end
in speci?cally described, so that the details which
of a connecting rod, a shaft journaled in the
I have disclosed in the foregoing description and
frame and geared to the crank shaft, cams on
accompanying drawings to illustrate a preferred
the shaft, a pair of rods slidably mounted in the
embodiment of my invention are not to be taken
frame and successively operated by the cams‘,
as limitative.
15 and levers fulcrumed in the engine block and
I claim:
each coacting with a rod for opening a valve.
An internal combustion engine comprising a
' '
frame, an engine block in the upper portion of
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