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Dec. 10, 1946.
2,412,341
A. KALITINSKY
MOUNTING FOR COOLANT TUBES
Filed March 27, 1945 ‘
2 Sheets-Sheet 1
Om
g INVENTOR
ANDREW KALrrmsKY
ATTORNEY
Dec.v 10, 1946.
2,412,341
A. KALITINSKY
MOUNTING FOR COOLANT TUBES
Filed March 27, 1945
2 Sheets-Sheet 2
INVENTOR
ANDREW KALrrmKY
I
ATTORNEY
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2,412,341
omrso smss ’ PATENT omen:
Patented Dec. 10, 1946 .1
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2,412,341
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,ivloommo FOR 000mm‘ 'ronris v
Andrew Kalltlnsky, ,Eaglevllle, Coms, essignor
to United Aircraft Corporation, East Hartford,
Conn, a corporation of Delaware
‘
Application lust-oil 2t, 1945. Serial No. 585,163 - ,
e @loims. loll. its-r316)
ll
This invention relates to e. mounting ior tubes.‘
such as coolant tubes. extending between the stag
tiopcry parts of e. ireepiston unit and the reels;
roosting piston
>
In circulating coolorit through the ‘piston es= -
. sembly, the connection from the stationary cylinm
2
cylinders, through which air automatically enters
st opposite ends of the cylinders. Compressed sirv .
leaves the cylinders through discharge valves to,
elso at opposite ends oi’ the compressor cylinders
and passes into s. center scavenge chamber so
and end chambers
and
> These chemise-arc
dots to the piston has been made by telescoping
may be connected‘ by c. scavenge manifold, not
tubes through whiclicoolsxit might be pumpedv
shown. \
into and out of the piston assembly, as shown,
for example, in the copendihg Ledwith applica
tlon, Seriol No. 585.3%, died March
recs; The
tight fit of the tubes to minimize leakage has
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‘Compressed gas from the scavenge chambers
enters engine ports
and lit which are uhoov=
ered by pistons 52 and if} at the end of the power
stroke, thereby permitting air to be blown through
the engine cylinder. Gas in the engine cylinders .
necessitated precise alignment of the stationary
is discharged through exhaust ports 58 into eg
and reciprocating tubes in order to prevent the
tubes from binding during opemtioi'i- of the unit. 15 haust manifold
~~ As shown in Fig. 2, coolant is circulated through
The different thermal expansions of vthe several
the piston by means of parallel tubes bit odd to,
parts of the unit during the operation may, how
Fig. 2, the ends oi’ which may-be supported by sta
ever, cause enough misalignment to cause bind=
tionory ports of the unit, as for example. the
ing or excessive wear on the tubes. A’ieeture of
this invention is on. orrehgemeht by which the 20 bracket to which may be integral with the end
cap 68 and by the brocketflil which may form
coolant tubes may have‘ appreciable movement
a part of the well 72, Fig. 1, of the central scav
in the port or parts in which they are mounted
enge member.
-. to correct any misalignment.
The tubes 82 and 6t fit within tubes 76 and 76
ciehtly ?exible to allow for lateral movement of 25 mounted in the compressor piston. Seals ‘i8 and
80 in the inner and outer heads. 82 and 84 of the
the tube, possibilities for leakage of the coolant
compressor cylinder prevent leakage of air from
especially if the coolant is circulating under Dres
the cylinder past the tubes. Tubes ‘it and 16
sure, are greatly increased. One feature of this
are long‘ enough, as shown, so that they are al
invention is a. connection for the stationary end
ways in contact with the seals.
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of the tube which will have a. tight connection
The tube 64 may have a reduced portion 85 ex
with the tube within the range' of lateral move
tending from a point adjacent the inner cylinder
ment permitted by the mounting of the tube.
head 82 to a. point midway of the cylinder so that
Other objects and advantages will be apparentv
coolant within tube 61 may pass through open
from the specification and claims, and from the
ings 86 in the tube and thence into the passage
accompanying drawings which illustrate an em
88 in the piston. Coolant from passage 88 ?ows
bodiment of the invention.
.
through the. compressor piston and through a.
Fig. 1 is a. sectional view through the free-pis
In making the coolant tube mounting'su?i
ton unit.
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chamber, not shown, in theengine piston and is
.
discharged through a. passage 90 also in the com
Fig. 2 is a sectional view in another plane show
40 pressor piston. The outlet tube 82 hes a. reduced
ing a mounting for the coolant tube.
portion 92 which communicates with the passage
The unit shown includes an engine cylinder W
90 during the outer half of the piston reciproca
having reciprocating pistons l2 and Hi to which
tion. Openings t6 provide for a ?ow of coolant
compressor pistons l6 and E8 in cylinders 20 and
into the tube 82. The above structure is described
22 are integrally connected. Sleeves 24 and 26
attached to the compressor pistons complete the 45 in the‘ Ledwith application, Serial ‘No. 585,160,
above referred to, and is not; in itself, a. feature of
reciprocating piston assembly. The sleeves in
combination with stationary pistons 28 and 30
form air spring cylinders.
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.
The pistons are moved apart by the burning'of
fuel injected into engine cylinder Id through one
this invention. ‘
In accordance with this invention, the coolant
tube is mounted in such a way that it is free to.
move laterally to a limited amount in order to
spring cylinders on the power stroke returns the
piston assembly. The p’istons are always main
compensate for misalignment of the parts and
also to accommodate changes in the position of
the parts resulting from the thermal expansion
tained at equal distances from the center of the
during operation. To accomplish this, the tube
engine cylinder by a linkage which may include
racks extending from the piston assemblies and
meshing with a pinion, not shown.
Intake manifold 42, which extends ‘around the
compressor and engine cylinders, conducts air to
intake valves M in the heads of the compressor 60
62 has a ?ange $6 ?tting between a. shoulder 98
on the bracket 66 and a disk I00 clamped between
the end of the bracket 66 and a housing I02
mounted on the end of the bracket. Clearance
is provided between the disk ion and the tube to >
or more nozzles 32.
Air compressed ‘in the air
permit. the tube to move laterally and the shoul
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3,412,341
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tube to minimize leakage oi the ?uid past said
. 'der as terminates at a point spaced‘ irom the tube '
so that a limited amount'oi lateral movement for.
cooperating means. ~
3. In a tree-piston unit, an engine cylinder and
the tube may be available. A/ring ilil may ‘be
piston, a compressor cylinder and piston, said
placed on the‘ ?ange 98 and the shoulder 98 to“
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5 pistons being connected to move as a unit, a tube
eliminate end play in the tube.
To prevent‘ coolant from leaking around the ' mounted on 'and extending from one oi said pis-tons, a stationary tube telescoping with said ?rst
tube, the‘ end oi the tube is connected to a pas
_.
sage ‘I08 in‘the' housing 102 by a ?exible connec- tube, said tubes providing a connection for the
circulation oi coolant through the piston, a sup-.
tion or sealing device which includes a sleeve
‘ I" having on its inner surface- a resilient seal 10' porting structure ‘for said tube having a coolant
passage therein, said structure and stationary
tube iorming a cooperating means‘ for supporting
the tube in such a manner as to provide a lim-_
action. Adjacent the outer endoi the sleeve I00,
ited amount of lateral movement ior the tube. and
the housing J02 has a ?exible seal. “2 iormed 15' a ?exible connection between the passage and the >
lill which engages with the outer surface oi the
- tube and is preferably varranged so that .pres
sure acting on the seal will increase the ‘sealing .
oi a ring or rubber or a similar material having ‘
end oi the tube.
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an inwardly extending rib ill extending toward
4. In a tree-piston unit, .an engine'cylinder
and piston, a compressor cylinder and piston,
the outer end oi the sleeve in such a manner
that the pressure of coolant actingon the rib
said pistons being connected to 'move as a unit,
will increase the sealing engagement ‘with the 20 a tube mounted on and extending from one oi
sleeve. .The seal l_l2,may be clamped in place by
a ring “6 which surrounds‘ and is radially spaced
said pistons.‘ a stationary tube teiesco ing ‘with
said ?rst tube, said tube providing a nnection _
for the circulation of coolant through'thc pis
from the sleeve.
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ton, a supporting structure ior said tube having
The inner end oi tube 12 which has a plug Ill
may be supported by a resilient gasket I20 which. 25 a coolant passage therein; said structure and
. stationary tube forming a cooperating means
for supporting the tube in such a manner as to
provide a- limited amount oi lateral movement '
will allow a limited lateral movement tor the
tube. The seals 18 and 80, which are~located in‘
the cylinder heads 82 and ll and extend around
and engage the tube ‘ll. also have a limited
amount oi lateral movement to permit the lat 30
tor the tube, ‘and-a ?exible connectionbetween
eral movement oi tube 62 to take place.‘ Thus,
the tube 62 will adjust itseli to any misalign
the passage and the end' _oi the tube. said con
nection including a sleeve, and a seal between the
ends oi the sleeve and the tube and passage re
ment oi the parts without causing any leakage- -
spectively.
,_
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With this arrangement,vthe mounting ior the
5. In a iree-piston unit, an engine cylinder
tube may be su?iciently free to permit the desired 35 and piston, a compressor cylinder and‘ piston, said
lateral movement oi the tube in compensating
pistons being connected to move as a unit, a tube
irom misalignment and at the same time they
mounted on and extending from one oi said pis
tons,la stationary tube telescoping with ‘said ilrst
sleeve 1i 8 in conjunction with the seals no and
H2 pr ides a substantially liquid-tight connec-'
tion between the passage I06 and the tube so that‘
no substantial amount of coolant will be lost
past the tube mounting.
tube, said tube providing a .connection ior the
circulation of coolant through the piston, a sup
porting structure tor-said tube having a coolant
passagetherein, s'aid structure and stationary .
tube iorming a cooperating means ior supporting ,
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= It is to be understood that the invention is not
'the tube‘in such'a manner as to provide a lim- }
limited to the speci?c embodiment herein illus
trated and described, but maybe used in other 45 ited amount oi lateral movement tor the tube, V
‘ ways without departure from its'spirit as de?ned
and a ?exible connection between the passage._
by the following claims.‘
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and the end of the tube, said connection includ
I claim:
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. ing a sleeve, a sealing ring at one end engaging
I. In a tree-piston unit, an engine cylinder and'
with the tube, and a second sealing ring'engag
piston, a compressor cylinder and piston, said 50 ing with the opposite end oi said sleeve.‘
6. Ina .free-pistcn' unit, an engine cylinder
pistons being connected to move as a unit, a tube
mounted on and extending irom one oi said ‘pis
and piston. a compressor cylinder and piston,
tons, a stationary tube telescoping with said ?rst
said pistons being connected to move as a unit.
tube. said tubes providing a connection for the
a tube mounted on and extending from one of
circulation of coolant through the piston,‘ and a. 65 said pistons, a stationary tube telescoping with
supporting, structure for said tube having a pas
said ?rst tube, said tube providing a connection
sage‘ therein, said structure and stationary. tube
in the circulation of coolant through thepis
having cooperating means for supporting the tube ’
in such a manner as to provide a limited amount.
of lateral movement for the tube.
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2. In a iree-piston unit, an engine cylinder and
ton, a supporting structure iordsaid tube hav
60
ing a coolant passage therein, said structure and
stationary tube forming a cooperating means ior
supporting the tube in such a manner as to pro
piston, a compressor cylinder and piston, said pis
vide a limited amount of lateral movement for
tons being connected to move as a unit, a tube
the' tube. and a ?exible connection between the '_
mounted on and extending from one of said pis
pass’age and the endoi the tube. said‘connection
tons, a stationary tube telescoping with said ?rst 65 including a sleeve, a sealing ring at one end en
tube, said tubes providing a connection for the
‘circulation oicoolant through the piston, and a
supporting structure for said tube havinga pas
sage therein for coolant, said structure and sta
tionary tube having cooperating means for sup 70.
porting thetube in such a-inanner as to provide‘
a limited amount oi lateral movement 'ior the
tube, and a sealing'device on the end oi the 4
engaging with
gaging'with
thethe
tube,
opposite
and a second
end of sealing
said sleeve,‘
ring
said sealing rings being ‘constructed and arranged to permit a relative movement between
the tubeFand the passage without causing leakage
pasttheseals.
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