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Патент USA US2405940

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Aug, 29» 19%.
o. M. BURKHARDT
SELECTOR COCK
Filed A9111 14, 1945
2 Sheets-Sheet 1
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INVENTOR.
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Orro M. BURKHARDT
BY
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ATTORNEYS
Aug, 299 39461
Io. M. BURKHARDT >
$459534
SELECTOR COCK
Filed April 14, 1943
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2 Sheets-Sheet 2
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0/11
INVENTOR.
OTTO M. BURKHARDT
BY
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MWfyV/VM
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ATTORNEYS. ,
Patented Aug. 20, 1946
2,405,940
" UNITED" STATE s
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2,405,940 *
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SELECTOR'COCK
om M. Burkhardt, Euclid, Ohio
~ Application April 14, 1943, Serial No. 483,033
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This invention relates to the? art ofv selector ‘ I
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improved means for partially and controllably
releasing. the sealing engagement of the cock
during the adjustment thereof and for automat
cocks for controlling the ?ow of ‘liquids. '
The prior art contains cocks for selectively con
ically returning the cock to fully sealing en
trolling the flow of liquids from one or more sup-.
ply lines to an outlet for use or for. drainage, as Ul gagement in such manner as to facilitate the
found for instance in the U. S. Letters Patent
‘ adjusting movement of‘the cock and to limit such
release to anexact amount so as‘ to maintain
proper sealing effect at all times, even during
such adjusting movement of the cock.
ef?cient sealing means in order ‘to prevent leak
ing at any time, even under high pressures. This 10 ; Another object is to provide such a device with
to Koehler Nos. 2,226,169 and 2,233,840; and it is
wellvknow-n that such a control device requires
improved means for automatically determining
and indicating when the particular. adjusted posi
involves sealing means of a resilient nature but
experience has shown that suchselector- cocks
require considerable effort to manipulategand,
tion has been accomplished.
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I - Another object is to provide such a device that
for this reason, auxiliary'means have been em
ployed, for‘ the purpose of reducing the pres
sure between the sealing surfaces, thereby reduc
15 is of simple construction, can be easily manufac
ing the, turning effort as -Well as wear and dis
dependable in its action under all normal circum
tortion of the resilient sealingmeans.
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tured, installed, removed and repaired, and is
stances.
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Other objects will appear from the following
I When used on, modern aircraft, these, selector
cocks are usually so located that a remote con 2.0 description and claims when considered together
trol means has to be adopted; and, in order, to
employ a simple and light form-0f suchcontrol
mechanism, it is vnecessary that the selector» cock
with the accompanying drawings.
Fig. Us a viewillustrating the generalorgan
,ization of my improved selector cock and the con
require only a minimum of .effortto. operate it.
trol means therefor;
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It should be noted'also that in modernaircraft 25. .Fig. 2 is a topplan view of the selector cock
?re hazard aloneImakes the requirements ex
itself;
tremely rigid as to the seal against gasoline leak,
ageat any time.
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It is also desirable that there be some means
‘for automatically arresting the selector. cock in
certain predeterminedpositions so as to indicate
when such particular positions have been estab
lished, as for instance when av particular’ feed
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' Fig. 3 is a view taken on line 3—-3 of Fig. 2;
r Fig. 4 isatop plan-view of thecontrol means
forthe selector cock;
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I Fig. 5 is a View taken on-line 5-5 of Fig. 4;
.r Fig. 6 is a view taken online 6-6 of Fig. 3;
Fig. 'l is a view taken on line 1-4 of Fig. 6;
and
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let or has been shut off. No prior attempts to
Fig. 8 is a view, mostly diagrammatic, illus
trating the electric controlmeans. for the sole
accomplish such object have yet proved entirely
noids "of the plungers.
line has been brought into registry with the ‘out
satisfactory, so far as I am aware.
One serious
difficulty with such prior devices is that very often
the edges of the ports in the cock cut the seal
ing surface edges or cause waves and distortion 40
and hence leakage.
I
Having in mind the requirements ofsuch a de
vice, my present invention is designed to accom
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It is to be understood that the present form
of disclosure is merely for the purpose of illus
tration and that there might be devised various
modi?cations thereof without departing from the
spirit‘of my invention as herein set forth and
claimed.‘
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which such change can be made witha mini,
The main housing I has the threaded ports 2
and,3, respectively, for connection of tubing for
the liquid'from the supply'tanks, and the thread
ed outlet portd for connection, of its tubing.
.These ports‘are' adapted to be controlled by the
cone-shaped.’ cock 5 which may be of metal and
has suitably spaced vopenings therethrough for
registry with the ports 2, 3 and 4. The inner
mum loss of liquid, even under considerable pres
face of the housing has-secured thereto a con.
sure'in the line or lines-
Another object is to provide such a device with
tinuous annularfacingof suitable ?exible seal
ing material 6, as for instance synthetic rubber,
an improved form of sealing means for the cock.
which is‘ formed with a continuousannular band
Another object is to provide such a devic'ejwith
portion of increased thickness, as indicated at 6a,
plish several speci?c objects.
One object of my invention is to provide such
a device in which the change from one selected
position to-another can be made with a minimum
of
effort.
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Another object is. to provide such a device in
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2,405,940
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ations in mind, I have made my present pro
starting torque is first applied in an attempt to
visions so as to better adapt such a device for
turn the cock 5, the handle‘ 25 alone will be
moved because of the great initial resistance to
such turning movement, as above explained; and
such movement of the handle 25 will bring the
contact 30 into engagement with one of the con
remote control, as for instance in the case ‘of
aircraft, as above explained. That is to say, I
have here provided an improved form of sealing
engagement at the several ports; I have provided
means for momentarily withdrawing the spring
arresting plungers from engaging position upon
initiation of the rotative adjusting movement;
tact arms 3!, thereby closing the circuit through
positive and dependable manner.
ready to drop back into the recesses or seats
the solenoids 23 for withdrawal of the arresting
plungers 2| from engaged position. While with
and I have devised an effective notch or ser 10 drawal of the plungers reduces substantially the
ration means of interengagement between the
resistance to the adjustment of the cock 5, yet
operating shaft l4 and the stem of the cock 5
the remaining resistance thereto is still su?icient
as a means for raising the‘cock and thereby re
to hold the electric circuit closed through the
lieving the compression of the sealing material
solenoids until the cock 5 has been turned su?i
preparatory to adjustment of the cock 5. , Inci 15 ciently to bring the recesses 22 out of the region
dentally, I have provided also a means for limit
of their arresting plungers 2 !_
ing the raising of the cock 5 to an extent that
These parts are so constructed and arranged
may be equal to or a little less than but never
that the handle 25, when only normal turning
more than the amount of the axial yield of the
effort is-required, will occupy neutral or ?oat
sealing means, such limitation being essential to 20 ing position between the springs so as to hold the
prevent the cock v55 at any time from being lifted
bar 38 in middle or idle position and hence not
entirely free from its sealing means, which of
in electric contact with either of the arms 3!,
course would cause leakage of the liquid. With
as in Fig. 4 of the present drawings. The
these several inter-related ‘features of improve
plungers 2! then, under the influence of the
ment, I not only facilitate the rotative adjust 25 springs 2m thereof,ride on arcs of ‘concentric
ment of the cock in'a highly efficient manner but
circles with a minimum of resistance, as the hol
there is also ensured the seating of the cock in a
low shaft i4 continues to be turned, and‘ are
These are the
features which constitute my present invention,
22 when brought into registry therewith and to
together with any and all auxiliary features of 30 thereby arrestthe turning motion with the full
construction and arrangement which are in
force of the springs 2 la of the arresting plungers
volved therein.
My means for momentarily withdrawing the
arresting plungers 2! from their notches or seats
22, consists of the solenoids 23, one for each an
resting plunger, these solenoids being included
in an electric circuit which is adapted to be ‘closed
automatically at the start of turning the handle
2i.
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The angular movement of the handle 25 alone,
as the initial step in the operation of this de
vice, is madevpossible by the combined resistance
to the'turning of the shaft it, which‘is greater
than the resistance of springs 33, as above ex
plained.~ According to my present invention, the
25 which is preferably of dielectric material, the
resistance between the plungers 2i and their seats
starting torque of the cock 5 being greater. than 40 22 is ?rst relieved by automatically withdraw
that required for continued operation after with
ing the plungers 2! immediately upon applica
drawal of the arresting plungers from engaged
tion of starting torque to the handle 25, as ex
position. The handle 25 has electric contact
plained; and a further small amount of motion
?nger 28 in constant engagementrwith the an
then raises the stem H due to the wedge action
nular electro-conductor ring 2'! which is located 45 of the‘ serrations I? and I 8 so as to relieve the
upon the dielectric support '28 upon which the
compression of the sealing material, the cock 5
handle 25 is rotatably mounted and within easy
being raised against the tension of spring. 8.
reach of the operator, the support being mounted
These two factors appreciably reduce the resist_
for instance as part of the panel board of the
ance, and the handle 25 and the bar 30 will then
pilot’s cabin, as indicated by reference letter P. 50 assume ?oating position between the arms 31 so
There is a source of electric current 29 in'the
as to break the electric circuit through the sole
circuit which includes ‘the ring 27 and, the sole
noids; and such condition will continue through
noids 23,_the other side of the solenoids being
out the remainder of the turning movement of
grounded. Although only one plunger andv sole
shaft i4. As a result, the plungers 24 are re
noid unit is indicated in the circuit illustrated 55 leased from the holding influence of the solenoids
in Fig. 8 of the present drawings, it is to be
and are then ready to snap back into engagement
understood that all of the plunger and solenoid I with their notches or seats to arrest the rotative
units are included in the same circuit, as will
movement of the shaft Ill exactly when it has
be readily understood from the present disclosure. ' been continued to the point of full‘registry of
The ?nger 28 has electric connection with the 60 the desired ports.
electric conductor bar 33 which is mounted upon
The rotative movement of shaft ill, upon with
the dielectric handle 25 and which is adapted
drawal of plungers 2|, will effect a wedging ac
to be brought into electric contact with either of
tion between the companion sets of serrations H
the electro-conductive arms 3! mounted upon the
and [8 with the result that the stern II and its
metal post, 32; this post being rotatable within 65 cock 5 will be lifted to a predetermined extent
the support 28, and the handle 25 being rotat
so as to reduce the frictional engagement be
ably mounted within the hollow post 32,. The
tween the cock and the sealing means against
post 32 is connected to the shaft M for rotative
which it seats, but without breaking the seal
adjustment thereof and this side of the electric
therebetween and thus without permitting leak
circuit also is grounded.
70 age of gasoline at any time. Then, when the
,The handle 25 is normally held in middle
upper ?anged end N5 of the stem ll abuts the
position, as indicated in Fig. 4- of the present
stop, Hi, there will be no further axial movement
drawings, by means of the coiled springs 33 or
of stem ll, there being then established ?rm
other suitable means arranged between the sides
interengagement between the sets of serrations
of this handleand the. arms 3!. But, when the
l1 and I8 so as to‘thereafter effect only rotative
2,405,940
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movement of the stem II and its cock 5 upon
continued rotation of shaft M, such turning of
the cock 5 serving to bring it to the desired posi
tion. When the shaft l4 has been turned sum
ciently to come close to the next position of reg CR
of the handle 25 will permit the cock 5 to come
help to turn the shaft M, as will be observed by
rial also serves as a means of ensuring depend
to fully lowered position.
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It is to be noted that the raising and lowering
of the cock 5 take place while the cock is other
wise in still position and thus the sealing material
is not subjected to the deforming action that
istry of the cock 5, the recesses or seats 22 will
would otherwise result from such movements of
again come before the plungers which will then
the cock while being rotated. That is :to say, the
snap into engagement therewith so as to thereby
partial and full engagement between the cock 5
locate and secure the cock 5 in its newly estab
lished position where it will remain until again 10 and its sealing material is, in each instance, ef
fected along a substantially rectilinear path.
changed in the manner above described.
Also the danger of deforming the sealing mate
It is to be understood that the notches or ser
rial is still further reduced by having the same
rations ll and I8 may be so designed as to per
of continuous and smooth form so that there are
mit the cock 5 to be turned in either direction
no edges that can bulge into the holes of the
with the same degree of efficiency.
cock, to be sheared when these holes are sealed
When the spring plungers 2! start to snap into
over, The raised portion 5a of the sealing mate
locking position, as above explained, this will
the operator who may at once discontinue the
able sealing eifect and relieving friction during
application of turning force to the handle 25;
whereupon there is no longer any wedging action
the rotative adjustment of the cock. Further
between the notches ii and iii to hold the stem
H and its cock 5 in raised position, with the
result that the cock is then free to be lowered by
the influence of the spring 13 so as to again
ing action therein which means that the sealing
material will not lose its normal sealing effective
occupy fully seated position.
By virtue of the wedge form of the companion
serrations IT and I8, the spring 13 will prove
more, this formof sealing means ensures a knead
ness and that its life of usefulness will be pro
longed. Also, by precluding the danger of de
formation or undue wear of the sealing material,
there is ensured practically no loss of liquid even
when under high pressure.
With my form of sealing means, as herein set
effective at once in bringing the cock 5 to fully
lowered position and there is no danger of the 30 forth, there is precluded the necessity of having
blind ports which are provided in other devices
cock remaining in raised position. That is, the
of this same general nature; and I regard that
serrations or notches I? and iii are of su?iciently
as an important improvement in the art.
steep pitch to ensure such immediate and com
By reducing to a minimum the resistance dur
plete lowering of the cock 5; and yet the pitch
ing the rotary adjustment of the cock 5, it is
of these serrations is such as to permit relative
possible to employ this device with remote control
movement between the same in order to effect
with a high degree of e?iciency and dependabil
the raising of the stem l l and the cock 5 in the
ity at all times.
manner above described and before rotation of
With my present improved form of device, there
- the shaft and its cock is started. According to
is ensured maximum flow of the liquid with min
the present form of illustration, these serrations
imum resistance to such ?ow, emphasis being
H and 18 are shown as having an angle of ap
placed in this connection upon the means which
proximately 45 degrees although I do not mean
I have provided for ensuring full registry of the
to limit the invention to this particular angle.
ports and complete sealing of the cock.
The clearance between these serrations, as above
mentioned, is also an important factor in this "
Also, the angular form of the notches or serra
tions i1 and I8 ensures opening of the cock in
connection
an efficient manner and ensures also immediate
The location of the notches or seats 22 for the
return of the cock to fully lowered position with
arresting plungers 2!, the location of the ports
out any danger of sticking. . Likewise, these
in the cock with respect to those in the casing,
wedge-like serrations H and I8 prove most em
and the engagement of theserrations ii and i8
cient in relieving the engagement of the‘ cock with
are all so constructed and arranged that, when
its scaling material, as above explained.
the plungers have fully entered their seats and
By virtue of my particular arrangement and
the cock 5 has been fully lowered, there will
always be ensured a perfect registry between the
operation of the two series of companion notches
or serrations H and I8, it is possible to employ
port in the cock and that in the casing to which
a large number of comparatively shallow notches
it has been moved for communication there
which can ‘be produced more economically than
through. The clearance between the sets of com
a few comparatively deep notches and which will
panion serrations IT and I8, as above explained,
afford a greater aggregate bearing surface, and
is an important factor in this connection also.
also will not be subject to wear and consequent
Thus it will be seen that, in my present de
loss of‘ accuracy which would result from notches
vice, part of the resistance to the rotary adjust
of comparatively deep form.
ment is ?rst and at once relieved, then the cock
Furthermore, the interengagement between the
is lifted so as to reduce the resistance still fur
two sets of serrations H and i8 serves to hold the
ther and at the same time to avoid turning against
the compressed- sealing means, and ?nally the 65 cock in the position to which adjusted; and this
is true also of the engagement of the plungers in
cock is turned. This series of movements is ini
their seats. Then, too, by virtue of the initial
tiated at once upon attempting to turn the han
release of the plungers, as herein provided, they
dle ‘£5 and they are carried out in this sequence
may be designed with greater holding force than
without any particular attention by the operator.
Then, when the desired position has been reached 70 would otherwise be possible. Likewise, there can
provided suiiicient pressure for complete seal
for the cook, the return of the plnngers to their
ing engagement of the cock with its sealing ma
notches tends to assist in the remaining turning
terial, more so than would otherwise be possible,
operation, which will be noticed by the operator,
since part of this pressure is relieved in an e?i
and the full seating of the plungers will tend to
stop such rotary movementof the cock. Release
cient manner before initiating rotary adjustment
2,405, 940
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of the cock; and thus there is no danger of the
rotary adjustment being hindered by such eifec
tive pressure of the cock against its seat, especially
in view of my particularly efficient and depend
able means embodied in the wedge-like serrations
l1 and I8, as herein disclosed.
Instead of the hand crank or handle 25, there
may be provided a crank and suitable connec
holding means ineifective, said lever and crank
having companion electric contacts for control
ling the circuit of said electric means and adapted
to be closed by the application of extraordinary
force upon said crank in the direction of opera
tion thereof.
5. vIn a valve structure, the combination of a
valve seat, a valve therefore rotatably adjustable
from one position to another, resilient sealing
tions for operation by a small electric motor to
gether with a conveniently located electric switch 10 means between said valve and its seat, means for
for control thereof.
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Thus my present form of device, by virtue of
the speci?c features herein emphasized, me‘etsthe
requirements of aircraft as above pointed-out,
although the use of this device is not to be under
stood as being limited to any particular ?eld of
arresting and holding said valve in adjusted posi
tion, means for adjusting said valve, said arrest
ing and holding means vand said sealing means
together constituting a combinedresistance to the
adjusting operation of said valve when in seated
position, said valve-adjusting'means including a
forked lever and an operating crank therefor,
Furthermore, this device is of simple construc
resilient means between the two sides of said
tion, it can be easily manipulated, it is of light
crank and the forks of said lever so as to provide
weight, it can be easily manufactured, installed, 20 a ?oating arrangement for said crank during ap
activity.
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removed, repaired, and is dependable in its opera
plication of normal torque thereto for adjustment
tion even to the extent of the rigid requirements
thereof, electric means for rendering said arrest
ing and holding means ineifective, said lever and
of aircraft, as above explained.
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What I claim is:
1. In a liquid control device, the combination
of a valve seat of conical form with a plurality
of ports therethrough, a continuous conical ring
of resilient sealing material upon said valve seat,
said sealing ring having an annular raised por
tion continuously thereabout and having aper
tures therethrough in said raised portion and cor
responding with said ports, a valve of conical form
for seating upon said raised portion and having
ports corresponding with those of said valve seat,
and means for effecting pressure of said valve
upon said sealing material so as to compress said
annular raised portion.
2. In a liquid control device, the combination
of a valve seat of conical form with a plurality
crank having companion electric‘ contacts for
controlling the circuit of said electric means and
adapted to be closed by application of extraor
dinary torque to said crank as occasioned by
said combined resistance, said parts being so con
structed and arranged that relief of‘ part of said
combined resistance, including that incident ‘to
said arresting and holding means, will permit
said electric contacts to open so as to release said
arresting and holding means for return to eifec
tive condition upon movement of said valve to
proper position therefor.
6. In a liquid control device, the combination
of a valve seat, a valve therefor rotatably adjust
able from one predetermined position to another,
spring-actuated plunger and detent means for
of ports therethrough, a continuous conical ring 110 locating and holding said valve successively in
of resilient material upon said valve seat, said
such positions, means for withdrawing said
sealing ring having an uncon?ned annular raised
plunger means so as to facilitate movement of said
portion continuously thereabout and having aper
valve from one position to another, means for
tures through said raised portion corresponding
with said ports, a valve of conical form for seat
ing upon said raised portion and having ports cor
responding with those of said sealing ring and
said valve seat, and means for effecting pressure
of said valve upon said raised portion and for
relieving such pressure during the seating and
adjustment of said valve, respectively, so as to
thereby effect a kneading of said uncon?ned
raised’ portion of the sealing material.
3. In a valve structure, the combination of a
valve seat, a valve therefor adjustable from one
position to another, means for holding said valve
in adjusted position, means for adjusting said
valve, electric means for rendering said holding
means ineffective, and an electric switch adapted
to control the actuation of said electric means,
said switch being co-ordinated with said valve
adjusting means for closing momentarily by the
initiatory movement of said valve-adjusting
means.
effecting adjustment of said valve, means,
actuated automatically by the initiation of the
operation of said valve-adjusting means, for
effecting the actuation of said withdrawing means
and for releasing the same after such withdrawal
so as to return the same to the in?uence/0f its
spring i action and thereby preparethe same for
automatic engagement with another detent
means when the valve has been moved to the eX
tent of bringing the plunger and detent means
again into co-operative relation.
7. In a liquid control device, the combination
of a valve seat, said valve seat being of conical
form and having a plurality of ports there
through, a continuous conical ring of resilient
sealing material upon said valve seat, said sealing
ring having an annular raised portion continu
ously thereabout and having apertures through
said raised portion corresponding with said ports,
a valve of conical form for seating upon said
raised portion and having ports corresponding
4. In a valve structure, the combination of a
with those of said valve seat, means for effecting
valve seat, a valve therefor adjustable from one
pressure of said valve upon said sealing material
position to another, means for holding said valve
so as to compress said annular raised portion,
in adjusted position, means for adjusting said
means for holding said valve in adjusted posi
valve, said valve-adjusting means including a
tion, means, actuated automatically by the initia
forked lever and an operating crank therefor, 70 tion of the operation of said valve-adjusting
resilient means between the two sides of said
means, for rendering said holding means ineffec
crank and the forks of said lever so as to provide
tive, said valve having a stem provided with an
a ?oating arrangement for said crank during
nularly arranged series of plain-faced wedge
application of normal force thereto for adjust
like notches, an adjusting member rotatable in a
ment thereof, electric means for rendering said
?xed path and provided with annularly arranged
2,405,940
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companion series of plain-faced; wedge-like
notches capable of inter-engaging relation. to
about and having apertures therethrough in said
raised portion corresponding with the ports of
those of said valve stem, whereby initiation of the
rotation of said adjusting member will release
said holding means and will produce wedging
action between said series of notches and there
by cause substantially straight-‘line movement of
said valve for partially relieving the pressure of
said sealing means,- means for limiting such
straight-line movement of said valve to a pre 10
said‘ members, and means for effecting pressure
of said valve member-upon said valve seat mem-
tion.
9. In a liquid control device, the combination
determined extent so as to
ber and having ports corresponding with those of
maintain inter
engagement between said series of notches for
torque transfer and so as to maintain a seal for
her so as to" compress said annular raised por
of a member having a valve seat of conical form
with a plurality of ports therethrough, a valve
member of conical form for said valve seat mem
said valve seat member, a continuous conical ring
of resilient sealing material upon one of said
members, said ring having an uncon?ned an
said valve, whereby continued rotation of said ad;
justing member will effect rotatable adjustment 15 nular raised portion continuously thereabout and
having apertures therethrough in said raised por
of ‘said valve without breaking the‘ seal of said
tion and corresponding with the ports in said
valve.
members, and means for effecting pressure of
8. In a liquid control device, the combination
of a member having a valve seat of conical form
with a plurality of ports therethrough, a valve
member of conical form therefor having ports
corresponding with those of said valve seat mem
her,» a continuous conical ring of resilient sealing
said valve member upon said valve seat member
and for relieving such pressure during the seating
and adjustment of said valve member, respec
tively, so as to thereby effect a kneading of said
uncon?ned raised portion of the sealing material.
material upon one of said members and having
an annular raised portion continuously there 25
OTTO M. BURKHARDT.
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