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Патент USA US2110339

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March 8, 1938.
. A. F. PIEPER
2,110,339
FLUID CONTROL DEVICE
Filed June 23, 193.4
2 Sheet/s-Sheet l
March 8„ 1938. `
A( F. PIEPER
' 2,110,339
FLUID CONTROL DEVICE
Filed June 25, 1934
an l.
2 Sheets-Sheet 2
..
ÉÍ
A
INVENTOR
2:02256 payer
„ -íì's And »
Y
Patented Mar. 8, 1938
2,110,339"
UNITED STATES; ¿PATENT OFFICE
2,110,329
`
'
vFLUID CONTROL DEVICE
Alphonse F. Pieper, Rochester, N. Y.
Application June 23, 1934, serial No. 732,127'
8 Claims.
The present invention relates to a fluid con
trol' device- such, for example, as one of the den
tal syringe type, and has for‘its object gen
erally to provideV in a device of this character
5 improved means for controlling the flow and
temperature of the fluid or liquid, comprising
an eñicient and economical form of construc
tion which can be conveniently handled and
controlled in operation.
v
A further object of the invention is to pro
vide an improvedv
tion with a liquid
pressure, including
maintain the fluid
tube or conduit for connec
or fluid supply source under
means adapted to heat and
or liquid therein at the de
' sired temperature;
A further object of the 4invention is to provide
a unitary liuid heating tube or conduit adapted
for attachment to-a fluid supply source and for
the reception of a syringe or other control de
20 vice and one having improved electrically heated
means for‘heating or maintaining the fluid or
liquid therein at~ the desired temperature, and
in which the heating means is sealed within the
unit in a manner to prevent its coming in con
tact with the liquid or air, to which it would
otherwise be exposed.
A4 further object of the invention is to pro
vide ina device of the class described improved
means for controlling or regulating the ilow of
30 the fluid or liquid wherebyV to provide for a
gradual increase in the volume of the stream
discharging therefrom during initial operation of
the device, in order to insure a smooth and'even
flow of the liquid as distinguished from the usual
” rapid expulsion of the same under pressure.
(o1. 12s-_400)v
the initial supply of liquid discharging from the
latter will be of the desired temperature and
ready forv immediate use.
_
To these and other ends the invention resides
in certain improvements and combinations of
parts, all as'will beY hereinafter more fully de
scribed, the novel features being pointed out in
the claims at the end of the` specification.
In the drawings:
Fig. l is an elevation. of a iluid temperature
control device embodying the invention;
Fig. 2 is a view of the tubing unit detached
from the heater> and the syringe with which it
is shown connected in Fig. l;
V
Fig. 3 is a fragmentary'sectional elevation of
a portion of the'double resistance coil showing
the mannerr of connecting its ends with the metal
parts for attaching the tubing to the hot water
heater;
,
n
Fig. 4 is a longitudinal section showing the
manner of connecting the tubing with the in
sulating support therefor and the circuit receiv
ing terminals carried thereby;
.
Fig. 5 is a longitudinal section through the
syringe with the outlet valve shown in closed 25
position;
Fig. 6 is `a similar view showing the valve in
open position;
Fig. 7 is a` transverse section taken on line '1_-'l
of Fig. 6, and
'
Fig.. 8 is a longitudinal section through the
valve drawn to an enlarged scale.
'I'he same reference numerals throughout the
several views indicate the same parts.
The present syringe is one of the type adapted 35
A further object of the invention is to pro
vide improvements in a combined dental syringe
for connection with a liquid or fluid supply source
under pressure and in which the injection of
and iiuid holding tube` or conduit which will
afford new and improved results in the control
40 of the flow and regulation of the temperature
ofthe iiuid in devices of this character.
A-further object of the invention is to pro
vide in combination witha fluid or liquid> heat
the liquid is effected by the pressure in the sys
tem, such, for example, as a water supply sys
tem. The syringe may be connected with either
ing device, an improved dental syringe connected
30
a Warm or cold water supply source, as preferred.
While the present device is intended'for. use pri
marily by members of the dental profession in
whatever capacity it may be found advantageous
in the treatment of the teeth of the patients, it
with the heating device by means of flexible tub
ing having- an enclosed heating element such as ' is not necessarily limited to such usage and may
an electrically heated coil unex-posed to the lluid be employed by others for the injection oi iluids
and'sealed within the tubing against exposure to orfliquids for whatever purpose desired.
outside air and moistureWher-eby to protect the
heating element againstvthe effects of oxidation’
or corrosion and whereby to' heat or maintain
the fluid or liquid remaining inv the tube from
time to time at a temperature corresponding sub
stantially to that of thev fluid Within the heater,
`so that-_upon opening the nozzle control `valve
Referring to the drawings, the syringe proper
comprises a pair of inner and outer tubular mem~ 50
bers il) and Il, respectively, telescoped for longi
tudinal movement one relative to the other, and
l2 represents a nozzle tube connected with the
outer tubular member Il, by a coupling l2a as
shown in Fig. 1. The tubular member Il prefer 55
2,110,339.
:during initial operation of the syringe whereby
the present instance a sleeve or tubular casing
preferably having the function of a handle. A
tube I3 is disposed within the casingand has an
to insure a smooth and even .flow of the liquid or,
in other words, to prevent a too rapid discharge
thereof upon the initial opening of the valve.
-enlarged end lI4 fitting the bore thereof.
The
'enlarged -end I4 is provided with a Valve cham
ber -I5 to -which liquid or fluid is suppliedunder
pressure by a conduit I6 connected with the
valve chamber by a coupling I1. >The coupling
>is preferably screwed into the portion I4 and is
provided with a tapered seat I8 tightly fitting a`
correspondingly tapered seat on ,the yend of said
porti-on I4 whereby a liquid tightjoint is'> formed
between said parts.,- A valve I9 having a holder
19a is disposed within the chamber I5 and nor-
mally closes the inner end‘ ofl the tube I3, as
'shown in Fig. 5. The valve is held uponits seat
by a spring 20, the inner vend of which is prefer
ably supported by a member 2| threaded within
the tubular portion I4 for adjustmentlongitu
h dinally therein‘to- varyrthe tension on the spring,
whereby to regulate the pressure required to
open
the
valve.-
.
'
“
~
The head is recessed to` receive suitable pack
This is accomplished by making the cylindrical
portion 30 of the valve extension but slightly
smaller >in diameter than the diameter of the
bore of the `tubular member I3 so as to provide
for a restricted flow of the liquid uponithe in
itial downward movement of the valve stem 33.
However upon continued downward movement
ofthe Vstem and valve the tapered portion 3l of ` '
the extension will permit of a gradual increase
in the size ofthe inlet opening of the tube I3
thus affording a gradual increase in the flow of
the liquid through the tube.
The valve stem actuating member 35, as pre
viously stated, is made Vadjustable longitudinally
However, the-actuating member 35 is designed
to afford selective control` of the 'valve whereby
it may be set at a slightly open position if de
sired to permit `of a `drop by `drop- discharge of
the liquid or, if preferred,`it may be adjusted to 30
permit of a continuous discharge of a steady
stream of varying capacity merelyy by turning
5 whereby to form a liquid tight'jointA between
the'head and tube. _A support y25jis threaded
Within the head for> longitudinalmovement -there-v
in to compress the-‘packing‘and may be adjusted
the actuating member within the threaded pas
spring 26 is interposed betweenthe support ¿25
and thedinner end I4 of the tube I3 to urge the
head Il outwardly tothe normal position shown
in Fig. 5.
"_
,
-
' -
A thimble 21 is threaded within and forms` a
support for the tubular casing yI 0 and also serves
as a'support for the tube I3 within the casing.
Suitably connected `with the thimble isa ‘coiledV
spring 28 forming a guard for> thel outer hoœ or
conduit 29 adjacent` its pointof connectionfwith
the syringe, the purpose of said conduit being
described hereinafter.
20
Within .the outer tubular member II and its
normal position will be such as to slightly clear
the outer vend of the stem in order to insure`
vproper seating. of the valve I9 under pressure of
ing 24 surrounding the tube I3 as shown in Fig.
for this purpose from time to time by the use of
a suitable tool such as a spanner wrench.v A
d
l
'I'he Valve YI9 may be formed of any suitable
material such as rubber and has a recessed ex-l
tension thereon comprising a cylindrical portion
30 terminating in atapered or conical end por->`
tion>3 I , each of said portions normally lying with
in the recess or bore of the tube I3, the Valve
extensionrhav‘ing Va, dependingpart 32 projecting
through the valve proper within a recess `formed
in thesupport I9a, as shown in Fig. 5. . Loosely
fr60 positioned Within the tapered portion 3| of the
valve` extension is an operating stem or element
33 which extends within the tube I3 and prefer
ably projects into theY discharge vpassage 22' of
vthe outer tubular member II. The upper end
’of the valve stem extends loosely within ythe bore
34 of an actuating member 35 for the stem which
is made adjustable within the passage 22 by
:35
volume of the stream discharging from the same
the spring 20.
-'
The head 'II is _provided with an outlet 22
leading tothe nozzle, the outletbeing in commu
nication with a bore 23 in which is telescoped
the outer end of the tube I3, which in all posi
tions of the head projects within the bore thereof.
780
order to 'provide for 'a gradual -increase 'in the
ably comprises a recessed head for supporting
the nozzle, the head being slidably mounted vvin
the outer end of the ‘memberjIIL comprising in
sage 22 of thehead by the use of a suitablev tool i
inserted through the bore 23 of the head before 35
the latter is assembled within the casing I0.
The operating means for moving the nozzle
head inwardly against the resistance of the spring ,
26 to effect opening of the valve I9 comprises a
finger lever 31 having its lower end disposed be 40,
tweenthe ends 38 of a band 39 which is prefer
ably lclamped. upon the tubular casing I0 by a
bolt or pin 4IJ forming Va pivot upon `which the
lever is adapted to swing'. At the point of con‘
nection of the bandwith the casing I II an opening
4I is cut in one side of the casing which is in
registry with another opening> 42 formed in the
Wall of the nozzle head Il. .The ñnger lever 31
carries-a lateral projection 43 extending through
the vopening 4I into and preferably through‘an
opening 42 of the tubular head I'I`, so that upon
moving thelever to the position shown in Fig. 6
the head will be moved Within the casing I0 and
relative to the tube I3, the inward movement of
the head >being limited by the contacting of an
adjustable stop collar 44 on the head with the
outer end of the casing fr0 which may occupy dif
ferent positions according> to the extent to which
it is desired’to open the valve.v
The» supply means «from which the fluid or'
liquid is discharged to the flexible tubing and the
syringe may be of any well known type such, for
example, as that shown by United States Patent
No. 1,911,386, comprising a liquid control Vunit`
for supplying either `hot or cold water to a dental
fes
syringe.> A corresponding unit is indicated gen- i
Verally atv 45 in Fig. 1 and comprises a reservoir
threading it therein, the diameter of the borebe
ing slightly larger than that` of the stenrto per
having liquid inlet connections, not shown, and a
liquid to the nozzle I2 `when the valve I9 is'in
syringe and adapted to bel actuated
open position as shown in Fig. 6.
control said-valve, not shown.
` communicating valve housingl 46 having a dis-`
mitthe ñuid or liquid to'pass around the stem , charge valve provided with an operating arm 41, ` 70
and through the lateral ports 36 for discharging `forked at its end to receive and support the
d
;
„
As previously stated, itis desired- to control
or regulate the ilow ofV the liquid to the nozzle in
thereby to
Y 'I‘he housing has an extension 48 provided with
a> threaded end'portion 49 upon which‘ is screwed ‘ì
'2,110,339
the insulating coupling 59 for supporting the
flexible tubing, the heating coil therein and
other parts, as shown in Fig. 4. The tubing com
prises the inner and outer tubular members I6
and 29, the resistance element 5i for heating the
fluid being secured on the outer surface of the
inner tube which contains the fluid to be heated
or kept at the desired temperature, when not
using the syringe. The resistance element may
10 be formled in any desired manner but preferably
comprises a double coil of wire wound on the in
ner tube in a manner described hereinafter and
so positioned as not to come in contact with
the ñuid or liquid flowing through or contained
15 within the tubing.
20
30
40
45
3
ing contact member 52 as shown in Fig. 4, where
by to form.' a liquid tight joint between vsaid parts..
The inner end of the iiuid holding tube I6 is
forced over the annular rib-like portion 62 of the
short metal tube 6l and is secured in position by
tightly wrapping a thread or fine wire 53 upon
the overlapping portion of said fluid holding tube .
as shown in Fig. 4, thus affording a sealed joint
between said parts.
The opposite end of the inner tube I6 is like 10
wise secured upon the reduced portion I1d of the
nipple l1, said portion having an annular rib
like member |1b thereon over which the tube I6
is forced, the end of the tube being secured by
the wrapping lßa whereby a, liquid tight joint 15
is afforded between the tube and the nipple.
The coil is also protected from exposure to
outside air and moisture during the changes in ` The joints between the nipple l1 and the tubes
IE and 29 are protected by the thimble 21 on
temperature of the heating and cooling periods
for the liquid within the supply reservoir 45, since the casing Hl and the guard 28 carried by the
f
I' 20
the interior of the outer tube 29 is kept in air thimble.
The joints between the inner ends of the tubes
tight condition at all times, as described here
I5 and 29 and the metal parts 6l and 51, with
inafter. If the resistance element or coil 5l were
exposed there would be periodic accumulations of which said ends are respectively conn-ected are
moisture on the surface of the coil between the protected by a detachable guard 54 screwed on
heating and cooling periods, due to condensation, the threaded portion 65 of the insulating cou 25
which would be likely toI result in oxidation or pling 59.
As previously stated, the resistance element 5l
corrosion of the metal and gradual deterioration
may be formed in any desired manner, but pref
of the same.
erably comprises a double coil of wire looped at
'I'he coupling 5€! which is formed of suitable in
its middle portion as shown at 66 in Fig. 5, theV 30
sulating material, as, for example, phenol con
loop being secured upon the tube l@ by wrapping
densation products, such as “Bakelite”, has se
the binding thread läd about the same. 'I‘he op
cured thereon a terminal receiving part 52 in
sulated froml a second terminal receiving part posite portions of the wire, extending from the
53, both of said parts being secured by molding loop, are spirally wound on the outer fa'ce of thel
inner tube l5, the ends of said portions, one in-f
the material of the coupling about the same as
shown in Fig. 4. Detachably connected with the dicated at 51 and the other at 58, being respec
tively connected with the short metal tube SI
parts 52 and 53 are the posts or studs 54 and 54a
with which the terminals of the wires 55 and 55a and the nipple 51, preferably by means of solder
as shown at B9 in Fig. 3. The end portion S1
are connected by the screws 56.
of the coil is secured by extending it beneath the'l 40
'
A nipple 51 serves to connect the outer flexible
tube 29 with the terminal contact member 53 into wrapping 53 on the inner end of the tube IG, and
which the threaded end of the nipple is screwed the portion 68 of the coil is secured by extend
as shown. in Fig. 4. The nipple is provided with ing it between the nipple 51 and the surrounding
annular rib-like portions 58 over which the end portion of the outer tube thereon.
With this arrangement the end portion 51 of H45
of the tube 29 is forced whereby to more firmly
the coil is connected with the terminal of the cir
secure the tube upon the nipple. To insure a
better gripping action between the nipple and cuit wire 55 by means of the short metal tube
tube, the latter is held by tightly wrapping there
Gl, the terminal receiving member 52 and the
on relatively fine wire or strong thread-like ma
terminal or binding post 54 thereon. The op
posite end ES of the wire is connected with the 50
terminal of the circuit wire 55d by means of the
nipple 51, the terminal receiving contact member
53, and the binding post or terminal 54a there
on, as shown in Fig. 4.
The circuit wires 55 and 55a are respectively
connected with the coils 10 and 1i of the step
down transformer shown in Fig. l, the trans
50 terial, as indicated at 59 in Fig. 4, the two wrap
pings shown being at opposite sides of one of the
annular shoulder portions of the tube forced out
wardly by the underlying rib-like portions of the
nipple, whereby a strong leak-proof joint be
tween the tube and the nipple is afforded, so that
no air or liquid can possibly enter the tube
around the nipple and cause damage to the re
sistance coil, wound on the inner tube.
The opposite end of the tube 29 is likewise se
60 cured upon the nipple l1, the latter having the
annular rib-like portions 58a and the wrappings
59a provided for the same purpose in each case.
The nipple 51 is provided with a sleeve 69 of
insulating material for separating it from the
65 short metal tube 6| forming a connection be
tween the inner flexible tube IB and the metal
contact member 52 having a passage there
through communicating with the threaded por
tion 49 of the inlet valve housing 48 as shown in
70 Figs. l and ‘1. The short metal tube 5| is rig
idly connected with the nipple 51 by molding the
material of the insulating sleeve 60 between said
parts, and in screwing the nipple into position,
the outer end of the metal tube El will become
75 iirmly seated on the end of the terminal receiv
former being connected preferably> with anordi
nary lighting circuit, the voltage of which is re
duced to afford the desired heating capacity for 60
the coil 5l.
It will be understood that while the unitary
heating tube or connection shown in Figs. 1 and
2 is particularly adapted for use by dentists for
heating or maintaining the fluid remaining with 65
in the connection at the desired temperature`
after closing the control valves therefor, that
the tube or connection may be employed by oth
ers for the heating of fluids or liquids for what
ever purpose desired.
It will also be understood that the íiuid or
70
liquid may be heated within the tube to differ
ent temp-eratures by varying the voltage of the
current passing through the heating coil by any
well known means or in any desired manner.
75
4
I claim:
2,110,339
i
l. A fluid control device comprising a pair of
tubular members mounted for longitudinal move
ment one relative to another Vand one having a
fluid passage leading to the other, a valve car
ried by one of said members normally closing said
passage and having an operating elementcoop
erating with the other of said members to open
said valve upon relative movement between said
members, said valve including cylindrical and
tapered portions, the cylindrical portion uppn
opening the valve affording a restricted flow of
the fluid through said passage and the tapered
portion affording a gradual increase in the flow
tubular member having a valve chamber in one
end thereof, the opposite end of said member be
ing reduced and sleeved Within said bore to afford
relative movement between said members one
longitudinally of another, a fluid supply conduit
connected with said chambena valve within the
chamber normally closing the'inner end of said
reduced portion and having a tapered extension
disposed within said reduced portion, an oper
ating stern for the valve within the reducedportion
having one end engaging the tapered extension of
the valve, an actuating part for the stem disposed
within the bore of the outer member and provided
with one or more fluid outlet passages, means
thereto, and manually operable meansfor effect
for moving one of said members longitudinally of
the other to effect unseating of the valve, and
resilient means for returning said members to
ing relative movementbetween said members.
normal position.
of the fluid therethrough, means connected with
„1.5 the
valve carrying member for supplying fluid
2. A fluid control device comprising a pair of
inner and outer tubular members mounted for
relative movement, one having a fluid discharge
passage communicating with the other and ter
minating in a fluid inlet opening, a tapered valve
normally closing said opening and' adapted When
l125 progressively opened to afford a gradual increase
in the flow of the fluid through the opening, an
j
6. A syringe comprising communicating inner
and outer tubular members mounted for move
ment one relative to another, a nozzle carried by
said outer member in communication therewith,
said inner member having a fluid passage for dis
charging fluid under pressure to the outer mem
ber, a valve for closing the inlet end of said pas
sage having a tapered portion extending within
yoperating element for the valve extending lon
the passage and provided with a recess, an oper
gitudinally within said passage, an actuating
part for said element disposed within the outer
ating stem for the valve extending longitudinally
within said passage and projecting within said
recess, an actuating part for said valve stem 30
adjustable within the outer member to control the
position of the valve and provided with a recess
within which the valve stem projects, said actuat
ing part having one or more fluid outlet ports
therein for discharging fluid to the nozzle, and
30 tubularrmember and having one or more fluid
discharge ports therein, and means for effecting
relative movement between said members to
cause said element to move said valve.
3. A fluid control device comprising a pair of
.35 inner and outer tubular members mounted for
relative movement, one having a fluid discharge
passage communicating with the other and ter
minating in a fluid inlet opening, a valve nor
mally closing said opening including a tapered
portion extending within the opening, an op
erating element for the valve extending longi
tudinally within said passage, an actuating part
_for said element adjustable within said outer
member to control the position of the valve rel
means movable on one of said members to eñectrelative movement between the same.
'7. A syringe comprising a pair of tubular mem
bers mounted for relative movement one longi
tudinally of another, a nozzle carried by one of 40
said members in communication therewith, the
other member having a fluid discharge passage
communicating with- the nozzle carrying member
and terminating in a fluid inlet opening, a valve
ative to the inlet opening, and operating means
for moving one of the tubular members relative
to the other to effect unseating of the valve and
during which movement a gradual increase in
the flow of the fluid will be afforded by reason
of the taper of the valve.
4. A fluid control device comprising an‘outer
normally closing said opening and having thereon
a tapered portion extending within said passage,
an operating element for the valve extending
through said passage into the nozzle carrying
member, an actuating member for said element
, tubular member provided with a bore, an inner
tween said members, the tapered portion of said
valve when the latter is moved .from closed posi
tion serving to gradually increase the size of the
tubular member having a valve chamber in one
end thereof, the opposite end of said member be
ing reduced and sleeved within said bore to afford
relative movement between said members one
longitudinally of another, a fluid supply conduit
connected with said chamber, a valve within the
chamber normally closing the inner end of said
60 >reduced portion and including an enlongated
tapered member extending within said reduced
portion, an operating stem for the valve disposed
45
adjustable within the nozzle carrying member, .
and means for effecting relative movement be
inlet opening to provide for a corresponding ¢
gradual increase in the ilow of the fluid there--
through.
8. A syringe comprising a pair of telescoped
inner and outer tubes, one movable longitudinally
of the other, a nozzle on the outer tube communi 60
eating therewith, a valve seated on the inner tube `
and normally closing the latter, said valve having
within said reduced portion, an actuating part for a stem'projecting within the outer tube, an ac
the valve stem adjustable Within the bore of said tuating part for the stem threaded within the
65 outer member, means for moving one of said Y outer tube and adjustable therein to control the`
position of the valve relative to its seat, said“
members longitudinally of the other to effect un
adjustable actuating part having one or more out
seating of the valve, means adjustable longitu
let ports discharging into the outlet tube to sup
dinally of one of said tubular members for co
operation with the other to vary the extent of ply fluid to the nozzle, a fluid supply conduit com
70 movement of the valve When opening the latter, municating with the inner tube, and manually 70
and means for returning said members to normal operable means by which to move one of the tubes
relative to the other to effect opening of said
position.
f
'
5. A fluid control device comprising an outer valve.
ALPHONSE F. PIEPER.
tubular member provided with a bore, an inner
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