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Патент USA US2128866

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Aug.~30, 1938.
Filed June 9, .1956
_ '
3 Sheets-Sheet l
Jobzlii hem-am”,
Aug. 30, 1938.
Filed June 9, 1936
5 Sheets-Sheet 2
' Jakiz? Wilkemaiz,
8* myiamyaf
Patented Aug. 30, 1938
John E. Wakeman, Dallas, T‘ex., assignor of one
fourth to George Cou nts Preston, Dallas, Tex.
Application June 9, 1936, Serial No. 84,338
1 Claim.
This invention relates to rotary compressors,
and has for the primary object the provision
of a device of this character employing recipro
cating pistons and cylinders therefor, the latter
5 consisting of a unit rotatably mounted with the
cylinders arranged substantially tangentially to
the axis of rotation and with the closed ends of
said cylinders disposed in the direction of rota
tion, so that the compression will be in the direc
10 tion of rotation.
With these and other objects in view, this in
vention consists in certain novel features of con
struction, combination and arrangement of parts
to be hereinafter more fully described and
For a complete understanding of my invention,
reference is to be had to the following descrip
tion and accompanying drawings, in which
Figure 1 is a vertical sectional view illustrating
20 a compressor constructed in accordance with my
Figure 2 is a transverse sectional View centrally
through the cylinder block offset to show the in
let ports and showing the pistons moved fully
25 within the cylinders and completing the compres
sion strokes of the compressor.
Figure 3 is a view similar to Figure 2, but offset
to show the exhaust ports and showing the pis~
tons completing their suction strokes.
Figure 4 is a sectional view taken on the line
4-4 of Figure 2.
Figure 5 is a fragmentary sectional view taken
on line 5—5 of Fig. 3 but with the block rotated
to a different position and showing intake and
35 exhaust ports for a cylinder of the compressor.
Referring in detail to the drawings, the nu
meral I indicates a suitable sectional housing
joined together, as shown at 2, and the opposite
walls of said housing have openings 3 to ro
40 tatably receive a hollow shaft 4.
The ends of
the shaft project outwardly of the housing I
and one end has connected thereto an air ?lter
5, while the opposite end is adapted'to be con
nected to a storage tank (not shown). A par
45 tition 6 is located in the shaft 4 and divides said
shaft into intake and exhaust ends ‘I and 8, re
spectively. The intake end ‘I of the shaft has
intake ports 9 for connecting the cylinders III
to said intake end of the shaft. The exhaust
50 end 8 of the shaft has exhaust ports I I to com
municate said exhaust end of the shaft with the
cylinders I 0,
A cylinder block I2 is journaled on the shaft
4 and is arranged within the housing and has
55 secured to one side thereof a sleeve I3 surround
(01. 230-177)
ing the shaft 4 and extending exteriorly of the
housing and has secured thereto a power wheel
I4. The power wheel may be connected to a
power source in any suitable wayfor the pur
pose of rotating the cylinder block in a clock
wise direction.
The cylinders I0 are formed in the cylinder
block I2 and are arranged substantially tangen
tially to the axis of rotation of said cylinder block
or, in other words, are arranged angularly to the 10
shaft 4. Reciprocally mounted in the cylinders
are pistons I6 and the inner ‘walls of said cyl
inders have ports I‘! adapted to communicate
with the intake and exhaust ports during the
rotation of the cylinder block. The pistons are 15
shaped to match the irregular walls of the cyl
inders, that is, the inner walls in which the ports
I‘! are formed and these ports ll overlie both
the intake ports 9 and exhaust ports II, and
communicate ?rst with the intake and then with
the exhaust ports. These portsare arranged in
pairs peripherally spaced around shaft 4, each
pair being spaced from the next to provide for
a dwell between the compression and exhaust
strokes of the pistons.
Supported by the housing I are cam tracks I8.
Shafts I9 extend into said cam tracks and are
equipped with rollers 20 which ride on the tracks.
Connecting rods 2| are journaled on the shafts
I9 and are pivotally connected to the pistons,
as shown at 22. The pivots 22 are located lat
erally of the shafts I9 and in the direction of
rotation of the cylinder block and the latter is
provided with sockets forming guides 23 for guide
elements 24. The guide elements form an inte
gral part of the connecting rods and are ar
ranged in alignment with the shafts I9. The
elements 24 have grooves to reduce friction and
to permit any ?uid in the guides to escape. The
cam tracks are shaped to bring about reciproca
tion of the pistons in the cylinders during the
rotation of the cylinder block. The pistons when
moving outwardly of the cylinders draw air into
said cylinders which is followed by a dwell at the
outer ends of the strokes andthen in moving in 45
wardly with respect to the cylinders the pistons
compress the air in the cylinders for a limited
movement of the pistons on-the compression
stroke and then force the compressed air through
the exhaust end 8 during the pistons completing
their compression stroke.
In operation, power is delivered to the power
wheel M which rotates the cylinder block and
brings about reciprocation of the pistons in the
cylinders. On the suction strokes of the pistons 55
air is drawn into said cylinders from the atmos
phere by way of the intake end of the shaft 4,
said air ?rst passing through the ?lter 5. The
exhaust ports during the suction strokes of the
pistons are closed to said cylinders. At the end
of each suction stroke there is a swell prior to
the compression stroke provided for by the con
tion of the cylinder block. The cylinder block
formation of the cam tracks and also the pe
Having described the invention, I claim:
A rotary compressor comprising a cylinder
block having ?at faces arranged at right angles
ripheral spacing of the pairs of ports. During
10 the initial compression strokes of the pistons,
the exhaust and intake ports are closed to said
cylinders, bringing about a compressing of the air
in the cylinders. The compressing of said air
in the cylinders is in the direction of rotation of
15 the cylinder block. Thereby, after the initial
movement of the pistons on their compression
strokes, the cylinders communicate with the
exhaust ports permitting the compressed air to
escape by way of the exhaust end 8 of the shaft
20 4. The escape of the compressed air is aided by
the pistons completing their compression strokes.
A compressor of this character will efficiently
compress air in a storage tank or like device with
a minimum consumption of power and also due
25 to the arrangement of the pistons and cylinders,
each revolution of the cylinder block will produce
a maximum output of air under a high com
The, centrifugal action of the piston assembly
-30 aids in rotating the block on the suction stroke
due to the cam tracks being arranged angularly
to the axis of rotation of the cylinder block and
the pistons of said piston assembly work out-
acts as a ?y wheel for the compressor.
The exhaust ports are arranged in the hol
low shaft 4 and in such a way that the cylinders
will be closed to the exhaust end 8 of said shaft
during part of the compression strokes of the
to each other and provided with an axle open
ing and cylinders opening outwardly through
said faces, said cylinders having ports communi
cating with the axle opening, a hollow shaft ex
tending through the axle opening,va partition in 15
the shaft separating the ends thereof from each
other, said shaft having intake and exhaust ports
at opposite sides of the partition to move into
and out of registration with the ports of the
cylinders during the rotation of the cylinder 20
block, a ?xed housing receiving the cylinder
block for rotation therein and having the ends
of the shaft extending through opposite walls
thereof, said cylinders being located tangentially
of the shaft, a cam track surrounding the block 25
and carried by the housing, rollers engaging the
cam track, shafts connecting the rollers in pairs,
said block having guides opening through the
flat faces thereof and arranged in alignment
with the shafts and at right angles to the axle, 30
pistons in the cylinders, connecting rods jour
naled on the shafts and having offset portions
pivoted to the pistons, guide elements formed on
wardly to an increasing radius on their suction , the connecting rods and received by the guides,
35 strokes. The pistons of the piston assembly and a sleeve surrounding a portion of the axle 35
work inwardly to a decreasing radius relative to and rotatably supported by the housing and hav
the axis of rotation of the cylinder block on their ing the block secured to one end thereof and
compression strokes. Since the cam tracks are having the other end secured to a power take-off
not moved when contacted by the piston assem
40 bly, they do not absorb the centrifugal force and
the reaction is in the general direction of rota
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