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Патент USA US2408127

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s. c. SCHULE
Filéd Jan. 13, 1944
(l. Il'
' 2 Sheets-Sheet 1
Sept. 24-, 1946.
ca. c. SCHULE. '
,Filed_ Jan. 15, 1944 'I
2 Sheets-Sheet 2
8 .
6a 19
Patented Sept. 24, 1946
Georges Charles Schiile, Buenos Aires, Argentina
Application January 13, 1944, Serial No. 518,134
4 Claims.
(01. 152-419)
_.This invention relates to a novel type of com-'
.pressor for supplying air under pressure to the
terial, to the inner side of which is applied a
plate 8, ofperforate metal or wire gauze, and‘ the
tireslof automobiles, trucks and similar vehicles,
felt and gauze are mounted in a cup-like frame
and substantially has for object an improved
.9 ‘whose side wall is adapted to be amxed by
compressor of simple construction, adapted for
performing. the automatic vsupply of compressed
means of screws or other suitable elements, to
air to the several tires of avehicle while the same
is travelling, and thus maintain the necessary
the outer side of said openings,‘ while ‘its ‘bottom
wall is formed with a plurality of longitudinal
shutter-like openings I B, for the admission of
degree of pressure in the same.
air from outside;
The novel type of apparatus in accordance 10 ‘ LAt the opposite side ofsaid casing vl is formed
with this invention offers, besides,‘ the advantage
an extension ll, formed integral with the same
of being, readily and speedily installed on motor
or as avseparate body, adapted to be securedjto
vehicles of any type, markor design, ‘without
the casing I by any suitable means and in which
necessity of introducing any substantialmodi
two chambers. l2 and“ are formed. The cham
‘ber 12' is charged, with a certain amount of .011
?cati'ons into the parts, or organs of the ‘vehicle.
I4, or other lubricantpintroduced into the com
The invention also views‘ other objects which
partment by an upper opening, adapted to be
will more “fully be understoodfromv a considera
tion of the followingspeci?cation.
In order to facilitate the understanding of this
invention and carry the same readily into prac
closed by a screw l5 or similar means, andcin
which a wick ‘I6 of absorbent material is sub
20 _merged,,inser_ted through a hole , I’! provided in
tice, a preferred embodiment of the same has
been shown by way of'example in the accom
the chamber, the wick [6 extending to the 'bot-,
tom .ofgthe cylinder 4, where it is in contact with
a disc l8 of felt-or other suitable absorbing ma
panying drawings, wherein:
terial which bears against the upper end of the
the novel type of, compressor, in accordance with 25v casing I.
The chamber l3 contains a ?lter formed by a
this invention, andlof the means for securing the
same to a vehicle.
body [9 of tow, wool or other suitable material,
for ?ltering the airy discharged, as will be ex
Figure 2 is another diametric view in elevation
Figure 1 is a diametric section, in elevation, of
and section, of the sameicompressor, ‘the section
plained later on, through 'a duct 20 which ex
being-taken on the line ;A-—A of Figure 1, and .30 tends through one of the walls of the chamber.
Figure 37 isa diagrammatic detail which illus
The chamber is also provided with a small Valve
trates the manner of mounting the improved com
_or exhaustIcock 2i, and a safety valve 22, .for
balancing any excessive pressure arising in the
pressor on one :of the wheels of a motor car.
circuit, provided, if desiredjwith manual means
In all the said ?gures, similar numbers of ref
erencehave. been used to indicate like or corre-V 35 for controlling said pressures and adjusting the
sponding parts. '
same to the maximum desired.
;-In the form of construction shown, the novel
type of compressor in'accordance with this in
With reference to the drawings it will further
be seen that through the entre casing I extends
a. horizontalv bore 23, of suitable diameter and‘
lined on its inner surface by a tubular bushing
',vention, substantially consists of a metallic cas
ing or crank-case l, of parallelopipedic shape
and preferably formed by twovertically juxta
posed parts, conveniently secured together by
means of ?anges 2 and screw bolts -3, or the like.
24, of .antifrictional» metal, and in said bushing
a‘ crank shaft" 25 is conveniently mounted, to the
'central part .of which is rotatably connected 2.
connecting rod 26, for the reciprocating opera
a cylinder 4 which, if desired, may be formed 45 tion of a plunger or piston head 21 of. the usual
type, slidably mounted in the cylinder 4, above
integral with said-casing or consist of an inde
From the top of the casing-l extends vertically
pendent element, adapted to be secured to the >
referredlto. Through the entire length of ._the
crank shaft ,25 extends a duct 28, conveniently
bent and with its outlet arranged at the centre
of a ,port 5.
50 of said shaft.
One of the ends of the crank shaft 25 is ?ush
-With reference. to Figure2 it will also 'be seen
with the outer surface of the casing I, being
that in one of the sides of the casing I, openings
v‘6, preferably of rectangular shape, are provided,
connected by screws or similar means 29 to a
covered on their outer side'by an air ?lter. This
bracket 30, of conveniently curved shape ‘for its
casing l by means ofvscrewdboltsor similar means
and in communication with said casing by means
r?ltercomprises ‘a piece of. felt, tow ors‘imilar‘ma 55 rotative operation, to be described later on.
" '
it will be seen that the upper chamber 53 of the
Through said_arm 3!} extends in radial direction
cylinder 4 is tightly closed at its upper end by
a duct 31, formed with the necessary bend, the
means of a metallic cap 55, in the center of which
is slidably arranged a flat valve 55, adapted to
inlet of which registers with the duct 28 of the
crank shaft 25, having applied to its outlet a
obturate the inlet ori?ce 51 of said chamber,
being normally held in its position of closure by
nected with the feed valve 33 of the tire 34 of
a spring 58 or similar means.
the wheel by means of a flexible tube 35, of rub
The plunger or piston 21 is provided in the
ber or the like, provided in its interior with any
its head with an interchangeable bushing
suitable means for holding the usual ball of said
10 '59, formed with a central opening 60, to estab
valve permanently in its open position.
lish the communication between the upper and
In order to assure a perfectly tight joint be
lower chambers El and 62, respectively, of the
tween said elements 25 and 33, a packing disc
cylinder 4 and adapted to be obturated, at a
36, of suitable material, is inserted between the .
given time, by a ?at seated valve 63, normally
surfaces of the same, the disc 35 being also pro
held in its position of closure by a spring 54 or
vided with a bore 3'! in correspondence with the
the like.
ducts Z8 and 3! of said elements.
The rod 26 of the piston 21 is provided over
The opposite end of the crank shaft 25 is‘
its entire length with a wick 55 of absorbent
for-med with a series of recesses 38 and 38a, of
material, for lubricating the operative parts, as
annular shape, in which latter recess 38a ?ts an
tightly ?tting short metallic tube 32, to ‘be con
will hereinafter be explained.
air transfer unit which supplies compressed air
short vertical extension 66, of cylindrical section,
to the free end of which is connected by screws
51, a ?at disc 58; and at the upper end or front
side of the cylinder'4, suitable openings 59 or
other means are provided for'the eventual adapa
tion of a handle or bar 10‘, substantially of
leather or other ?exible and impervious material,
held separated one, from the other by a ?at
washer 43 and adjusted in position by means of
a metallic rim or perforate disc 4|, connected to
the member 25 by means of screws or the like,
not shown.
straight form.
When referring to the drawings, it will be seen 30
‘that said-membranes or diaphragms 39 are con
nected at their center to a metallic bushing 42,
'formed'at its outer end with an extension 430i
Finally, it will be seen in the drawings, that
from the lower part of the casing l projects a
to. duct 28 as will hereinafter more fully appear,
said unit including two membranes or dia
phragms 39, formed of one or several layers of
The novel type of apparatus above described is
adapted to one of the wheels of a vehicle, one of
the rear wheels, for instance, in the manner illus
trated in Figure 3. vFor this purpose, the bar 35,
for rotating the crank shaft 25, is secured to
the central cap ‘H of the wheel hub 12 or to
another convenient part rigid with the same, by
means of bolts 13 or the like. On the other hand,
the casing I and integral cylinder 4 are rigidly
a?xed to the underframe of the vehicle or other
which extends; in axial direction, a duct 44, and
from the bottom of which‘latter extend, in radial
directions, several small ducts 45 which open into
the space formed between the said membranes,
and communicate by means of a perforation 46
in one'of said membranes, with the duct 28 of 40 convenient part of the same by means of a rod
14, one end of which may be secured, for instance,
the crank shaft 25.
to the respective mud guard 15, while its other
'The members 40 and 4| have their adjacent
end is formed with a'circular clamping collar 15,
jinternal edges beveled, as indicated at 39’, for
rotatably‘ applied to the lower extension 65 of the
the purpose of preventing cha?ng of the outer
casing I and: retained in position by the disc 58.
diaphragm 39 and to'also make the area of the
The rod or bar 14 is provided at a suitable point
‘inner face of the outer diaphragm substantially
with a spherical joint ‘H, which- will allow the bar
‘equal to the,‘ area of the inner face of the inner
14 to adapt itself‘ to the’ different lateral move
diaphragm to compensate for the loss in area of
ments of the wheels, as well as to the rising and
the inner face of the outer diaphragm due to
descending movements of the axles of the same,
~the diameter of the ori?ce 44, since it is desirablev
under the yielding operation of the several sus
for ef?cient operation to have the pressures act
pension devices. ~
ing onthe inner faces of both diaphragms sub
In these conditions, the outlet tube 32 of the
stantially the same.
arm 30 is connected to the usual-‘air feed valve
A cover plate 41 serves to tightly seal the open
‘33 by means of the tube 35,’ of rubber- or similar
ing 23 of the casing I, being ?rmly secured to
flexible material, provided, as abovev set forth,
the front of this latter by screws 48 or similar
with a suitable device for constantly maintaining
means; through said cover extend two radial
the usual ball of said valve in its open position.
‘ducts 49 and 55, with their inlet end at the inner
The outlet duct 20 of the chamber I3 is connect
side of said cover and arranged one with regard
t'o1the other at an angle of about 60°, as indicated 60 ed, in turn, by means of a suitablecoupling 18
to another flexible tube 19, extended by the 'in
with‘ dotted lines in Figure 2, the said ducts con
ternal or external part of the rod 14, and the
verging to one single duct 5!, which is in axial
opposite end 80 of which‘ communicates-with
registry with the central duct 44 of the extension
three or more similar ducts, not shown, inde
'43 of the central bushing,
pendently connected to the tires ‘of other wheels
of Y the vehicle by any suitable connecting means,
provided with means for holding the valves
The duct 49 communicates at its outer end 3
with another ?at duct 52, vertically extending
through the inner wall of the cylinder 4 and
which opens, at its outer end, into the interior
of a ‘chamber '53, formed in the head of said
thereof in their open position.
From the foregoing description it will be seen
that when the vehicle is running, the wheel ‘II
will cause, bymeans of the arm 3|],v the rotation
of the crank shaft 25 whichthrough thecon
cylinder. The duct 53, in turn, communicates
at its outlet end with another duct 54, Fig. 2,
extending through one of the front walls of the
‘casing l, and opening into the chamber 13, above
necting rodv 26 will cause the reciprocating mo
referred to.
tion of the plunger 2] inithe cylindérA, supported
in a substantially ?xed position by the‘ support
' "With reference to the ?gures of the drawings,
pressor unit on the wheel of the vehicle, said
bracket being keyed to the journal portion of the
crank-shaft and having a conduit communicat
ing with the outlet end of the duct of the crank
shaft, a tubular ?exible connection between the
bracket and the tire of the wheel on. which the
‘compressor assembly for attaching the same to a
?xed part of the vehicle to maintain said unit
stationary with respect to the crank-shaft.’
4. An apparatus carried by the wheel of a ve
hicle for in?ating the tires thereof, comprising,
a, compressor assembly, including, a lower crank
case portion and an upper crank-case portion
formed to provide‘ an air intake chamber and
also forming bearings for a crank-shaft, at least
maintain said assembly stationary relative to the
crank-shaft, and a ?exible connection leading 10 one crank-case portion having an air intake port
and one portion having a compressed air ?ltering
from said air ?ltering chamber to the tires on
chamber, and the other portion having a lubri
other wheels of the vehicle.
cant storage chamber, a pressure relief valve for
2. An apparatus according to claim 1 wherein
said compressed air ?ltering chamber, a cylinder
the air ?ltering chamber in the crank-case is
provided with pressure regulating valve means. 15 on the upper crank-case portion andin ported
communication with the said air intake chamber,
3. An apparatus carried by the wheel of a ve
said cylinder having a passage in its side wall and
hicle for in?ating the tires thereof, said appa
a valved chamber in the cylinder head communi
ratus comprising: a compressor assembly, includ
cating with the inlet end of said passage, lubricant
ing, a crank-case including an air intake cham
her, a cylinder surmounting the crank-case and 20 feeding wick means leading from said lubricant
storage chamber to the cylinder, 2, valved piston
having a passage in its side wall, the inlet end of
in the cylinder, a crank-shaft journaled in the
said passage communicating with a valved com
bearings of the crank-case and having an air
pression chamber in the cylinder, a valved piston
duct, a rod connecting said crank-shaft and pis
in the cylinder in ported communication with the
air intake chamber of the crank-case, a crank 25 ton, an air transfer unit at one end of the crank
shaft and having 'duct means communicating
shaft in the crank-case and having an air duct
with the air duct of the crank-shaft, a cover plate
including inlet and oulet ends, a connecting rod
having a plurality of radial ducts therein con
between the piston and said crank-shaft, a cover
verging to a central transverse duct, one of said
plate secured to one side of the crank-case and
covering the outer end of the crank-shaft, said 30 radial ducts establishing communication with the
outlet end of said passage in the cylinder and the
cover plate having-a radial duct and an axial,
air transfer unit and the other of said radial
transverse duct communicating with the outlet
ducts communicating with said compressed air
end of said passage, an air transfer unit between
?ltering chamber, a hollow bracket keyed to the
one end of the crank-shaft and the inner face of
the cover plate, said unit having duct means com 35 crank-shaft and in communication with the out
let end of the air duct ofthe crank shaft, said
municating with the transverse duct of the cover
bracket connected to the vehicle wheel, a ?exible
plate and also communicating with the inlet end
hose connection from the bracket to the tire of
of said air duct of the crank-shaft, a bracket con
the wheel which carries the bracket, a rod con
nected with the crank-shaft-at the end thereof
opposite the air transfer unit, said bracket se 40 nected at one end to the compressor assembly and
having its other end ?exibly connected to a ?xed
cured to a wheel of the vehicle and having a pas
part of the vehicle, and an air hose leading from
sage communicating at one end with the outlet
said air ?ltering chamber along said rod and
end of the duct of the crank-shaft and leading to
adapted to supply compressed air to the tires of
a ?exible connection attached to a valve of the
tire of the wheel to which the bracket is secured, 45 other wheels of the vehicle.
and means connected'with the crank-case of the
bracket is mounted, a rod connecting the com
pressor assembly to a ?xed part of the vehicle to
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