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Jdn. 14, 1947.
H. A. ALEXANDERSON ETAL
2,414,219 ‘
SEALING UNIT
Filed Nov. 28, 1942
7.
365—6‘243.1
22
15
11
2 Sheets-Sheet‘ 1
Jan. 14, 1947.
H. A. ALEXANDERSON EI‘AL
2,414,219
SEALING UNIT
Filed Nov. 28, 1942
2 Sheets~Sheet 2
Pi-FYBatente‘dY-Jami145171947 Q '
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2,414,219
rfSTA'lZ-ES: PATENT? OFFICE
‘I ‘SEALING UNIT
@Howard .A.v .Alexanderaon, ‘ Woodridge, and
Miller-man J.~Woll, Red Bank, N. , aaaignors
@to'Bendix Aviation Corporation, South Bend,‘
and, a corporation of Delaware
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_ {Application November as, 1942, Serial No. 467,240
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“
1 2 Claims.
(Cl.- zen-103)’
"l'hiv'sxinventionirrelates to sealingidevices, and
wparticularlyrto:rotarywalveisealsror air distrib-
with an air chamber 32 and a port 83, and its
other end terminating in a radially directed
.utingysystems.
mouth 34. Port 33 is normally connected through
"maintain .an.-e'ifective_ ‘seal-under» conditionscot ' '85 having a cylindrical‘ liner 36 and a series of
~- mlsalignmentfotzthe distributor.
‘ angularly disposed and radially directed ports 3'!
v"lityis.anotherobject: of'ithe-inventionrto pro- ‘ vide_‘a,_.seal_lcq,pable gofrggelfqcompengg?on in use
opening-into the chamber. The bottom port 31
of Fig. 1 communicates ‘with the throat .38 01' a
rior.‘irregularities?encountered :insurraces tobe 10 Venturi tube 39 having an upper section 40 se
sealed.
\
, a‘
j-
cured to housing 01' valve 21 by studs 4| of Fig. 2,,’
"Other objects will appear .i'rom a study ‘of the
and a lower section 43 secured’ to theiupper seo- ‘
uviollowing'speci?catlon‘cwhenzmadeinconjunction ‘ tion'.“ by a screw-threaded union‘ “- The in
withv the-V attachedqdrawings; throughout which ' ner. adjacent surfaces of‘Venturi sections 40 and
like numerals:designatelikeparts.
15 43 are notin contact, but are spaced a slight
:"Flg; 1 islan elevationalaand longitudinal, secamount (for example,-one one-hundredth of an
- ?ctional :view:o nan-air distributing device employ-
~ingyrthese 'ingunitoi’thepresant invention.
' inch) apart. as represented by the annular slot
,
ted aperture 45. This aperture 45 a?'ords direct
‘ ‘Fig.1 2 :‘lsaan, enlarged cross-sectional view 01'
communication 0.1’ air between passage-way ‘5 and
theeairxdistributingwdcvioe *and'sealinz unit taken 20 the throat 38 or venturi “by way or the annular ‘
,q.valongtheilinefiélot iFig.>l.
‘
‘_
chamber 41 formed between the overlapping, but
> Big. 3§isaplantview oi'itheseal-i'acing member
rv whichispartaof-the presentinvention.
spaced edges of sections 40 and 43. Passageway
_ > ‘48 opens into valve chamber 35 by wayof the -
a Fig»4:is'Ia;'longitudina1,~lsectional view‘ or. the
' ‘rectensularly disposed bores 50 and II.
" ti’acingmemberztakenalongthe'lineH of Fig. 3. 25 ' Venturi l8 terminates in a conduit portion hav
“1:18.;5g11BZ1BJIOZ'OSS-SECUODBI view of the facing
vmember takenaalong» theme 5-! of Fig. 3.
ring a conventional coupling gland 49 .fOr con
nesting the venturi to‘the atmosphere at a, point
of low pressure on an airplane.‘ io‘r example, a
_ [F1846 ,.is;anvenlarged; fragmentary, sectional
‘ "view otthei'acingmember-taken from thesectlon
votill'lg. 4.
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g
7
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.i
. Fig; 7 is a plan view of the gasket which is part
veof‘thesealing1unito’o1'*theepresentainvention; and
"Fig,.8>1s.-a longitudinal, sectional view of the
“gasket taken along the .l'line‘teof Fig. '7.
trailing wing surface.
.30
'a
‘
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‘
Allports 37. other than the bottom port, open
into transversely extending
'
having oppositely disposed and aligned conduit
couplings “connected to conduits 54 which con
.. neot with the conventional deice‘r boots carried by
'Eigs. lwtand-izrshow-an air-distributing valve of >35 anaircratt. As shown in Fig, 2; two additional
‘7 bracket ~'| l,,~has a 'shaftlzconnected to a worm
verse passageways I2. Terminals I! may be con
13 01 a, ispeed‘rgducmgkunlt including a‘ wheel u 40" nected to conduits leading to boots on the rudder
sxconnected to. astub shai‘tall. " :Shaft It carries a
--second~* worm alt which'drives- a ‘second ‘wheel,
. shown-cnlypartiany-at“ai‘lyior turning therstub ‘
,:~shaft 18;- which carries ‘av-gear i8 and pin ‘20.
action- motion. shaittztconnects to "the hub 23
‘ ‘ofjotorgzg;hgvingiendhbearing311113.083 ‘:5 and
‘ post and Stabilizers 01' the craft-
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'
In order to prevent leakage or air under pres
sure‘from passageway 28 to chamber 35 in the
process of distribution 01' air to ports 31, a novel
‘sponge “neoprene" cemented to the bottom 01’ re
cesslil along the s ace 58. A suitable! cement
18-26 carried ‘by‘the' verticalwalls of the housing ‘50 is known in the trade as “Fairprene.” Gasket 51
‘of distributor-valvel‘?. pi'Rotori'? has two, ?uid
is dimensioned to ?t within recess 56 with its in
‘passageways therethroughpnwhich connects to
her periphery ?ush with the inner surface of pas
U
3
.
'tangular cross-section of three-sixteenths by
4
,
.
sponge rubber gasket permits angling of sealing
three thirty-seconds inches.
member 59 without loss of pressure between the
Between gasket 51 and the inner surface of
liner 35, a seal facing member 59 is con?ned with
in rabbet 56. This facing member, which is com
posed of a hard, rigid material, such as carbon,
has low frictional drag on liner 36, and having
an arcuate sealing face. it conforms so closely to
- is moulded in the shape shown in detail in Figs
3-6, and when projected in plan, its outlines, as Y
' shown in Fig. 3, coincide with the outlines of
gasket and the member. Thecarbon member 59
the curvature of liner 36 as to give a true line, ‘
[rather ‘than point ‘seal between the passageway
28 (or 3|‘) and chamber 35.
While only one embodiment of the present in-. '
gasket 51 as shown in Fig. 7. Facing member 59 10 ventipn has been shown in the drawings, it is to
be understood that various changes may be made
is formed with an inner, or gasket-engaging sur
without departing from the scope or the present
face including ?at shoulder portions 59, and an
invention. For this reason, it is intended not to
angular ridge 6| projecting between shoulder por
limit the invention by the description herein
tion 50. Member 59 has inner and outer wall
portions 62 and 83, respectively, extending rec 15 given as an example, but solely by the scope of
tangularly from shoulder portions 50, and ter
the appended claims.
_ . What is claimed is:
minating in an arcuately shaped sealing sur
face 64.
,
.
Surface 64 is curved at a radius R as indicated
1. In combination with acylindrical chamber
I having an inner wall and a series of angularly
in Fig. 5, which radius is equal to the radius of 20 disposed .?uid ports opening thereinto; a rotary
' valve member mounted for rot'ation'axially with- _
the inner surface of liner 35, so that surface 64
l
in said chamber and having a ?uid passageway,
and the surface of liner 36 will have equal curva
said member having. a radially projecting por
ture. The sealing member 59 used with the
tion terminating in an‘ aperture mouth affording
gasket 51, the measurements of which are noted
above, has a radius of one and ?ve-eighths inches 25 communication with said‘ passageway, said pro
jecting portion being formed ‘with a comple
to mate with surface of liner 36 having the same
mentally curved face for frictional engagement ‘
radius.
with said cylindrical wall, said face being pro
The sealing member 59, when in position, as .
vided with a recess adjacent vthe apertured mouth
shown in Figs. Land 2, compresses gasket 51,
' with the result that ridge BI is embedded into 30 in encircling relation-thereto; and seali'ng'means
in said recess, said sealing means including an an
gasket 51 in a gas-tight relation, thus preventing
air under pressure in passageway 28 from being
diverted or by-passed between the contacting sur
faces of gasket 51 and facing member 59. The
nular shape inner cushion member of sponge-like
sible and is intended for the proper functioning
having on one side a continuous integral tapered
of the novel sealing unit of the present invention.
A similar sealing unit, including a gasket 51
its opposite side being formed with a curved face
resilient material ‘cemented in said recess, and
a complementally shaped outer‘ solid carbon fac
compression of gasket 51 by facing member 59 35 ing member-1 in said recess between said cushion
member and said inner wall, said facing member
is not total, and further compression is permis
projection embedded in said cushion member and
and a facing member 59, is arranged within a 40 of the same radius as the face on said projecting‘
portion in resilient engagementwithsaid-inner
rabbet 85 formed in the mouth 34 of passage
way 3l. It is believed unnecessary to further de
wall.
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2. In combination with a cylindrical chamber
scribe this latter sealing unit, since it is identical
‘having an inner ‘wall and a series of angularly
to that in rabbet 56.
The novel sealing unit above described is par 45 disposed ?uid ports opening thereinto; a rotary
ticularly adapted for use in an air distributor of , valve member mounted for rotation axially with
in said chamber and having a ?uid passageway,
the type represented by 21. In aircraft deicing
said member having a ‘radially projecting portionv
systems, air may be distributed cyclically to a
terminating in an apertured mouth affording
whole series of rubber boot elements, and it is
also, after in?ation of a particular boot, dumped 50 communication with said passageway, said pro
jecting portion being formed‘ with‘ a comple
overboard to the atmosphere, and then placed
mentally curved face for frictional engagement
under suction until reinflated. Air under pres
with said cylindrical wall, said face being pro
sure enters passageway 28, and when this pas
vided with a recess adjacentthe apertured mouth
sageway communicates with bottom port 31, as
shown in Figs. 1 and 2, the air is vented to the 55 in encircling relation thereto;- and vsealing means
in said recess, said sealing means including an
exterior through Venturi tube 39, and the flow ,
‘annular shape inner cushion member of sponge
creates a suction through passageway 46 and
like resilient material cemented in said “recess.
chamber 35, placing all boot elements at suction
and a complementally shaped outer solid carbon
pressure.
As rotor 24 is driven by motor l0, passageway 60 facing member'in said recess between said cush
ion member and said inner wall, said facing,
28, as well as passageway 3|, is rotated with a
member having on one side a continuous angular
snap-action, by virtue of the Geneva motion 20,
2i to each of the ports 31, and will dwell thereat 7 projection‘ embedded in said inner cushion mem
ber and integral laterally projecting walls at the
for a determined in?ating interval. Irregulari
, ties in the cylindrical surface of liner 3B, mis
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65 base of said angular projection for limiting the
alignment or lack of precise coaxiality between
rotor 24 and liner 36 and small irregularity in
the fit between mouth 30 (as well as mouth 34)
and liner 36, all tend to permit leakage between
chamber 35 and passageways 28 and 3|, but the 70
novel sealing unit is self-compensating for mis
alignment and surface irregularities, since the
penetration of the latter, said facing member
being formed on its side opposite the angular
projection with a curved face of the same radius
as the face on said projecting portion and resil- I
iently engaging said inner wall.
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HOWARD A. ALEXANDERSON.
HERMAN J.WOLF. ,
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