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Dec. 31, 1946.
2,413,636
J. M. LONG
comrnnsson mm
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Filed Aug. 30, 1946
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INVENTOR.
Dec. 31, 1946,
2,413,636
J. M. LONG
COMPRESSOR UNIT
3 Sheets-Sheet 2
Filed Aug. 30, 1946
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BY
IN VEN TOR.
Dec. 31, ‘1946.
J. M. LONG
2,413,636
COMPRESSOR UNIT
Filed Aug. 30, 1946
$1 *M
“N
3 Sheets-Sheet 3
RN \% 9% $1
_ £44145 M lava,
IN VEN TOR.
2,413,636
Patented Dec. 31, 1946
UNITEDv STATES PATENT OFFICE ~
2,413,636
COMPRESSOR UNIT
James M. Long, Henderson, Nev.
Application August 30,1946, Serial No. 693,950
8 Claims. (01. 230-159) '
1
,
The present invention relates to compressor
units in general and particularly to a reciprocat
ing vane type compressor. More speci?cally, the
invention comprises a light weight compressor
I ferred embodiment illustrative of the present in
vention is shown:
Figure 1 is a top plan view of a compressor unit
constructed in accordance with the present in
vention connected to a pressure storage tank;
unit of the reciprocating vane type in which
Figure 2 is a transverse section looking'in the ,
great e?iciency is attained by the provision of
direction of the arrows upon the line 2-2 of Fig
ure 1 and discloses the oscillating vanes ‘within
a multiplicity of double acting vanes actuated
by a single oscillating shaft.
,
the unit;
_
Fluids under pressure are used widely today
Figure 3 is a transverse section upon the line
in applications too numerous to mention. Every 10 3-3 of Figure 1 and shows the connection of the
?lling station has its motor compressor unit to
valves to the cylinder chambers upon both sides
provide air under pressure to be used in ?ll
of themovable vanes;
.
ing automobile tires. Industrially various gases,
Figure 4 is a partial longitudinal section upon
including air, are compressed to pressures vary
the line 4-4 of Figure 2 and illustrates the con
ing from a few pounds per square inch to many 16 nection of therotary drive shaft to the oscillat
hundred pounds per square inch. The usual corn
ing vane carrying shafts; and
.
pressor unit comprises a bulky, cumbersome,
Figure 5 is a longitudinal section at rldght angles
heavy, space-consuming mechanism, usually op
to the section of Figure 4 'being taken upon the
erating at relatively low speeds and with consid
line 5-5 of Figure 2.
.
20
erable vibration and noise. For example, a stand
The compressor unit constructed in accordance
ard compressor available today on the market to
with the present invention is indicated in the
compress gas to 125 pounds per square inch pres
drawings generally by the reference character
sure, and at the rate of approximately '70 cubic
In and includes a casing comprising a pair of
feet per minute, would weigh roughly 3,000
aligned cylinder casings ll mounted upon oppo
pounds, would occupy a space approximately 4
site sides of a central transmission casing I2.
feet x 3 feet x 5 feet, and would require a 25 horse I
Each cylinder casing ii is closed at its outer end
power driving motor. As distinguished from this
by a removable cover plate l3, secured by a plu
rality of bolts H, the exterior of both the covers
prior art device, the compressor constructed in
accordance with the present invention weighs ap 30 and the cylinders proper being provided with
proximately 150 pounds, is approximately 14
?anges or ribs IE to increase the rate of heat
inches in diameter x 32 inches long, and requires
only 7% horse power. Furthermore, it is sub
dissipation. Transverse walls I'I de?ne the inner
ends of each ‘of the cylinders II and also the
sides of the transmission chamber l2. Bolts
With an appreciation of the advantages to be 35 ls clamp the ?anged ends of the transmission
case l2 to the ?anged inner ends of the cylin
gained in manufacturing costs and in perform
,‘ders Ii, the peripheral margin of the walls I‘!
ance characteristics, it is an object of the present
extending therebetween.
invention to provide a new and improved oscil
Within each cylinder II. is a pair of longitudiq
lating vane type compressor.
’
It is another object of the invention to pro 40 nally extending barriers or walls indicated by
the reference character 2|. Each of these walls
vide a light weight compressor incorporating a
is ?xedly secured in sealed relationship, as by
plurality of double acting vanes upon a single
screws 22, to the cylinder inner surface and also
shaft.
'
.
is sealed at its opposite ends in contact with cover
A further object of the invention is to provide
an oscillating vane compressor in which rotary 45 I 3 and end wall l1. Seals 24 insure pressure tight
joints at both ends of the cylinder.
motion is translated into alternate oscillatory mo
stantially noiseless and vibrationless.
An oscillating shaft 28 extends longitudinally
through each cylinder and is rotatably mounted
in sleeve bearings 21 and 28 positioned in the
vide an oscillating vane type compressor incor
covers l3 and inner walls I'I. respectively. Each
60
porating an improved lubricating system.
shaft 20 carries a vane unit 29 comprising a cen
These and other more speci?c objects will ap
tral hub 30, rigidly ?xed upon and enclosing its
pear upon‘ reading the following speci?cation and
supporting shaft 28. Hub 90 is movable in sealed
claims and upon considering in connection there
relationship to the adjacent stationary walls 2|
with the attached drawings to which they relate.
by virtue of the presence of elongated seals 3| re
tion in a new and novel manner.
'
Still another object of the invention is to pro
Referring now to the drawings in which a pre
55
2,418,836
3
4
cessed into the wall 2|. A pair of triangularly
61 formed at diametrically spaced points with
sectioned vanes 32 extend diametrically from op
posite sides of the shaft, the outer end of each
trunnions 68. The latter are rotatably mounted
in a yoke 68 which is itself provided with seats
vane extending closely adjacent the enclosing cyl
1| receiving the reduced ends of the oscillatable
inderwall and making sealing contact therewith
shafts 26 in ?xed relationship. As is clearly dis
by longitudinally extending metallic seals or rings
closed and set forth in the copending application,
33 which it carries in slots 36. Each ring is urged
the power transmission means, upon the rotation
radially outwardly by leaf-type expander springs
of shaft 5| effects the alternate rotary motion or
34. The ends of each vane are similarly slotted
oscillation of the shafts 26.‘ This is believed to be
and provided with end seals 31 which move in 10 clear when it is recognized that all movement pro
sliding contact with the adjacent end Walls of the
duced by the angular tilting of trunnion 62 is.
cylinder. The presence of these seals or rings
accommodated either by the pivoting of the drive
effectively divides each cylinder II, with the co
ring 61 upon its trunnions .68, or by the angular
operation of the stationary walls, baffles or bar
displacement of the yoke 69 which latter move
riers 2|, into four chambers'indicated in Figures
ment, of course, effects the concurrent angular
> 2 and 3 by the reference characters 38A, 38B and
displacement of the shafts 26. As the vanes 32 are
39A, 393, respectively. The A and B chambers in
?xedly connected to the shafts 26, it is clear that
each case are separated by the movable vanes 32
the alternate arcuate rotational movement or
and the movement of the‘vane in one direction '
oscillation of the latter will effect the displace
causes the A cylinder to be reduced in size while 20 ment of the vanes, ?rst in one direction and then
the B cylinder is correspondingly expanded.
in the reverse direction. So long as the point
“X” is positioned as described, the extent of this
angular displacement effected in the oscillatable
shafts 26 will be determined by the angularity of
the trunnion 62 with respect to its carrying shaft
5|, any angularity between 0 and 45° being usable.
It is essential that adequate means be provided
to lubricate the moving parts of the mechanism
in order to make it self-contained and to elim
Movementin the opposite direction has the re
verse effect.
_ Each cylinder compartment A and B is pro_
vided, closely adjacent to the ?xed dividing wall
2|, with a pair of inlet and outlet ports 4| and
42, respectively. Each inlet port is provided with
a pressure operated valve 43 which permits of .
the entrance of air when the interior pressure is
less than atmospheric. Each outlet port 42 is ;
similarly pro ided with a pressure operated valve
44 which p events the entrance of air into the
chamber but which permits of its exhaust there
from under pressure. Each of the outlets 42 is
inate the necessity for operator attention. High
pressures are generated and it is necessary to pro
vide a positive lubricating set up. In a ‘preferred
embodiment, as illustrated, an oil pump unit ‘I6
is positioned within transmission casing I2 be
low the normal oil level thereof which, as illus
suitably connected b a pipe 46 to a common in- :'
let pipe 41 leadin to the pressure‘ reservoir or
- tank 48 prefera
trated in Figure 5, extends substantially to the
bearing 28. Unit ‘I6 is provided with ?ltered in
y strongly made to withstand
high pressures.
To actuate the’oscillatable shaft 25, a rotary
takes 11 at its lower end and contains a suitable
pressure creating device which may be standard
drive shaft 5|, located in the same plane, is ro
tatably mounted in a sleeve bearing 52 positioned
in an enclosing cylindrical portion 53 forming a
part of transmission housing I2. The outer end
of cylinder 53 isclosed by a plate 54 held in po
sition by removable screws 56 and forming a hous
and, accordingly, is not illustrated. The latter
is driven by a rotatable shaft 18 which extends
from the top of the unit and carries a gear 18
at its upper end in engagement with a spiral gear
8| carried by shaft 5|. At all times in the rota
' tion of the shaft 5| the pump 16 is actuated.
ing for a packing gland 51 which surrounds the
shaft at that point. Shaft 5| exteriorly of the
transmission casing |2 carries a suitable power
receiving pulley 58 to which is connected a driv
ing belt 59. It is to be understood, however, that 60.
> any suitable power transmitting means may be
substituted for the belt and pulley, as for example
gearing or a direct connection to a prime mover.
Oil under pressure flows from the unit ‘I6 by a'
pipe 82 and divides at ?tting 80 to ?ow through
conduits 83, 84 and 85. Conduit 85 extends
through the side of easing I2 and carries oil to
the bearing 52 of the shaft 5|. Conduits 83 and
84 extend to the bearings 28 and to each is con
nected, by means of a ?tting 85, a conduit 88
which extends through the inner wall |'|, through
an aperture therefor in the gasket seal 24, longi
Rotary shaft 5| extends from within the cyl
inder or tunnel 52 into the casing I2 proper and 55 tudinally through the wall 2 I, to connect, through
is therein connected to power transmitting means
an aperture in the seal 24, to an interior conduit
which convert the rotary movement of the shaft
88 in the cover I3 leading directly to the cavity
into oscillating movement of the shaft 26. The
8| adjacent the bearing 21 at that end of the
speci?c mechanical drive which effects this result
unit. The lubricant which is fed to'the bearings
is disclosed and claimed in my copending appli 60 28 and 5| drains directly back into casing I2, one
cation Serial No. 646,974, ?led February 12, 1946,
end of each of the bearings being open thereto.
for Mechanical drive mechanism. Brie?y, the
The oil which ?ows to the end bearings 21, how
construction comprises an angular arm 6| at the
ever, travels a more extended path. The two sides
end of shaft 5| from which extends a trunnion
are identical so only one will be described.
62 at an angle of 45° or less to the axis of the 65
Referring to the oil carrying conduit 88, oil
shaft. A contained imaginary point “X” in the
under pressure therein flows to the bearings 21 to
trunnion lies upon the intersection ofithe imag
lubricate that element, ?rst entering a cavity or
inary central axis of the oscillating shafts 26
recess 8| at the outer end thereof. Shaft 26 is
with the imaginary central axis of the rotary‘
provided with a central longitudinal conduit 82
shaft 5|. In all angular positions of the trunnion 70 open at one end to the recess 8| and at its opposite
effected by rotation of the shaft 5|, this point
end to a transverse intersecting conduit 93. Oil
remains ?xed. The inner race 64 of a bearing 63
from recess 9| under pressure derived from the
is mounted upon trunnion 62, its central plane
conduit 88 travels through conduits 8'2 and 83
including the point “X.” The outer race 66 of
onto the adjacent vane 32 where it travels in an
the bearing is seated within a drive ring or block 75 open groove 84 encircling the vane ends and side.
9,918,888
Lubricant in groove 94 clearly will lubricate the
adjacent surfaces of the vane and of the enclosing
' cylinder.~ The channels or grooves 94 upon the
diametrically opposed vanes converge at the inner
wall l1 and connect to the transverse duct 96
in the shaft 26, corresponding to duct 93 at the
opposite' end. Duct 96 in turn connects to longi
tudinally extending duct 91 which leads into the
interior of the transmission case [2. The rotat
and described in detail is fully capable of at
taining the objects and providing the advantages
hereinbefore stated, it is to be understood that
it is merely illustrative of the presently preferred
embodiments of the invention and that no limita- '
tions are intended to the details of construction
or design herein shown other than as de?ned in
the appended claims.
‘
I claim:
1. A compressor unit comprising a casing, a
ing mechanism within the case I2 is lubricated 10 pair of co-axially arranged cylinders secured to
largely by the splash of the oil as it is disturbed
the opposite ends of said casing, transverse walls
by movement of the parts and also by return of
separating
the interiors of the respective cylin
the 011 through the conduits 91 after it has trav
ders from said casing, a pair of shafts, one ex
eled the pathways described. All lubricating ?uid
is returned to the lubricating reservoir formed 15 tending from each end of said casing and through
said wall into the respective cylinders along the
by casing 12 and is again pumped through the
axis of the latter, each shaft having a sealed
system described, it being understood, of course,
relationship with the corresponding wall, a pair
that the pumping unit ‘I6 must be capable of
of vanes secured to each shaft within the corre
placing the oil under the pressure required to
sponding cylinder, the vanes of each pair ex
20
circulate it through the described system.
In the operation‘of the compressor constructed '- tending in diametrically opposite directions and
radially of the shaft, a pair of stationary parti
in accordance with the present invention, .the ro
tions extending radially inwardly from the cir
tation of the shaft 5| effects, through the novel
cumferential wall of each cylinder along a dia
power transmitting means positioned within the
metrical line to engage the corresponding portion
casing I2,.the oscillation of the shafts 26. Each
of the shaft between the vanes and divide the ,
complete rotation of shaft 5| causes each shaft
interior of each cylinder into two compartments.
23 to move through a complete cycle. The vanes
each of which contains a vane, each compartment
32 being ?xedly attached to the shafts 26 move
therewith and in their movement in one direc
tion compress the ?uids present within the B -
chambers in each cylinder. As the pressure rises,
the ?uid or gas is forced past the exhaust valves
44 into the conduits or pipes 46 to be added to
the ?uid present within the container 48. As
the vanes travel in the opposite direction, each
B chamber is increased in size, air rushing in -
having an inlet and an outlet port, a unidirec
tionally rotating drive shaft extending into said
casing at right angles to said two ?rst-mentioned
shafts, and means providing an operating con
nection between said drive shaft and said two
?rst-mentioned shafts whereby the unidirectional
motion of the drive shaft will oscillate said two '
?rst-mentioned shafts.
2. A compressor unit of the character defined
in claim 1 wherein the casing forms a lubricant
well, a lubricant pump having an inlet communi
ing compressed and ?uid ‘is forced therefrom
eating with said well, means to drive said pump,
through the exhaust valves 44 and into the reser 40
passage means'to conduct lubricant from said
voir 48. The cycle is repeated at high speed and
pump and along the radial ends and radially out
the movement of the shaft in each direction in . ward surface of each vane, and means to return
past the inlet valves 43 in response to the pres
sure differential. The A chambers are then be
each cycle effects two power strokes and two suethe lubricantto said well.
'
tion strokes in each cylinder. As there is a unit
3. A compressor unit of the character de?ned
upon both sides of the transmission case I2, it is 45
in claim 1 wherein the casing forms a lubricant
clear that at all timesthere are four pressure
well, a lubricant pump. having ‘an inlet communi
strokes and four suction strokes being effected
cating with said well, means to drive said pump,
during operation.
4
means to conduct. lubricant from said pump to
During this operation all of-the parts of the
one end of each of said cylinders, the portion of.
50
device are completely and adequately lubricated
each shaft adjacent said end of each cylinder
by the circulation of oil by the pump unit 16
provided with a port extending between
through the pipes and conduits described. Each \ being
said
shaft
end and points on the shaft periph
shaft-supporting bearing receives adequate lubri
ery near the adjacent radial ends of the vanes
cant and in addition, the internal surfaces of
the ‘cylinder I I_ contacted by the sealing rings 33 55 within said cylinder, the radially outward surface
and both radial ends of each vane being provided
are also lubricated. Pressure leakage, between
'with passages communicating with the ports in
the A and B cylinders in each instance is pre
each shaft, and the opposite end of each shaft
vented by the presence of the seals or rings 33
being provided with a port communicating'with
I and 31 in cooperation with the gasket 3| carried
by the walls 2| which abut the central hub of 60 the passages in the corresponding vanes to re
turn lubricant to the casing well.
each vane unit.
,
v
I
I
_
The unit is self-contained and is self-sufficient.
The operator need only check the unit at widely
spaced intervals to make such that there has not,
4. A compressor unit comprising a casing, a
a unit weighing as little as 150 pounds to place
within each of said cylinders, the vanes of each
as much ?uid under pressure as an ordinary unit
weighing 25 or 30 times as much and requiring
tions and radially of the shaft structure. a pair
pair of co-axially arranged cylinders secured to
the opposite ends of said casing, transverse walls
for some unforeseen reason, been a leakage of 65 separating the interiors of the respective cylin
ders from said casing, a shaft structure extending
oil which would prevent proper lubrication. Be
through said casing and-cylinders along the axis
cause of the presence of the multiplicity of work
of
the latter and having a sealed relationship with
ing units, there being in fact four power strokes
said transverse walls, a pair of vanes mounted
creating pressure at all times, the capacity of
the unit is extremely high and it is possible for 70 on the portion-of said shaft structure which is
pair' extending in diametrically opposite direc
of stationary partitions extending radially in
three to four times the power input.
wardly
from the circumferential wall of each-cyl
75
While the particular construction herein shown
2,413,636
7
inder along a diametrical line to engage the cor
responding portion of the shaft structure between
the vanes and divide the interior of each ‘cylinder
into two compartments, each of which contains a
vane, each compartment having an inlet and an
outlet port, a unidirectional rotating drive shaft
extending into said casing at right angles to said
8
7. A compressor unit comprising a casing, a.
plurality of co-axially arranged cylinders, said
cylinders being secured to the ends of said cas
ing, with an equal number of cylinders at each
end of the casing, transverse walls separating
the interiors of the respective cylinders and said
casing, a shaft structure extending through said
shaft structure, and means providing an operat
' casing and cylinders along the axis of the lat
ing connection between said drive shaft and said
ter and having a sealed relationship with said
shaft structure whereby the unidirectional mo 10 transverse walls, a pair of vanes mounted on the
tion of the drive shaft will oscillate said shaft
portion of said shaft structure, which is within
structure.
_
each of said cylinders, the vanes of each pair ex
5. A compressor unit of the character de?ned
tending in diametrically opposite directions and
. in claim 4 wherein the casing forms a, lubricant
radially of the shaft structure, a pair of station
well, alubricant pump having an inlet communi 15 ary partitions extending radially inward‘y from
eating with said well, means to drive said pump, .
the circumferential wall of each cylinder along a
passage means to conduct lubricant from said
diametrical line to engage the corresponding por- ’
pump and along the radial ends and radially out
tion of the shaft structure between the vanes and
ward surface of each vane, and means to return
divide the interior of each cylinder into two com
the lubricant to said well.
20 partments, each of which contains a vane, each
;6. A compressor unit of the character defined
compartment having an inlet and an outlet port,
in claim 4 wherein the casing forms a lubricant
.a/ unidirectionally rotating 'drive shaft extending
well, a lubricant pump having an inlet communi
into said casing at right angles to said shaft
cating with said well, means to drive said pump,
structure, and means providing an operating con
means to conduct lubricant from said pump to 25 nection between said drive shaft and said shaft
one end of each of said cylinders, the portion
structure whereby the unidirectional motion of
of each shaft structure adjacent said end of each
the drive shaft will oscillate said shaft structure.
cylinder being provided with a port extending
8. A compressor unitof the character de?ned
between said end of the shaft structure and points
in claim '7 wherein the casing forms a lubricant
' on the shaft structure periphery near the adja 30 well, a lubricant pump having an inlet commu
cent radial ends of the vanes within said cylin
nicating with said well, means to drive said pump,
der, the radially outward surface and both ra
passage means to conduct lubricant from said
dial ends of each vane being provided with pas
Dump and along the radial ends and radially out
sages communicating with the ports in each shaft
ward surface of each vane, vand means to return
structure, and vthe opposite end of said shaft 35 the lubricant to said well.
7
.
structure within each cylinder being provided with
a port communicating with the passages in the
corresponding vanes to return lubricant to the
casing well.
JAMES M. LONG.-_
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