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Патент USA US3093070

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June 11, 1963
5 Sheets-Sheet 1
Filed April 4, 1960
June 11, 1963
Filed April 4, 1960
5 Sheets-Sheet 2
United States Patent 0
Patented June 11, 1963
piece ?exible vane structure wherein the vanes can be
assembled in a unit comprising a series of substantially
Vertical vanes formed in a portion of the assembly and
a series of substantially horizontal vanes formed in an
Robert D. Emery, Wiclrliife, Ghio, assignor to Eaton
Manufacturing Company, Cleveland, Ohio, a corpora
tion of Ohio
Filed Apr. 4, 1960, Ser. No. 19,565
7 Claims. (@l. %--11®)
other portion of the assembly whereby these portions can
be arranged such that ?uid ?ow between the vanes is
directed ?rst through a vertical set of vanes and secondly
through a horizontal set of vanes, or vice versa, to provide
a grille whereby a cross hatching re?ect in directing the
?ow is encountered by the fluid due to the nature of the
structure [which can be utilized in a grille for a heating or 10 structural arrangement of the vanes in the assembly.
air conditioning device‘ or the like.
It is still a further object of this invention to provide a
In the past, grilles for heating devices or air condition
one piece ?exible vane which is simple in its design and
‘Broadly, this invention relates to ?uid de?ecting means
but more speci?cally pertains to a novel ?exible de?ector
ing units were constructed using a series of vanes or
de?ectors wherein the vanes were essentially formed as
a pivotable member which could be independently oper
therefore economical in its production and capable of
15 being formed from a material whereby it is possible to
mold a multiplicity of vanes in a one piece structural unit
ated or mounted in an arrangement such that the series
of vanes could be actuated by an arm or cross-piece se
cured to a portion of each vane in the arrangement. It
eliminating a vane assembly operation.
Further objects and advantages of this invention will
was valso essential in past construction that a separate
20 with the drawings forming a part of the speci?cation and
pivotable mounting be provided for each individual vane
to facilitate the vane movement effected by the cross
piece or arm. Therefore, in grille assemblies it has been
necessary in all of the units previously designed, in which
the vanes were individually or collectively adjustable to
vary the direction of ?uid ?ow therebetween, to provide
a pivotal ‘connection between the vanes and a suitable
frame on which the vanes could be mounted and thereby
more readily actuated and controlled.
Applicant, in view of the above limitations and struc
tural de?ciencies has provided herein a novel one piece,
?xed end, ?exible vane structure incorporated into a novel
grille assembly whereby the vanes can be actuated either
appear from the following description taken in connection
in which:
[FIGURE 1 is a sectional isometric view of the indi
vidual wane structure.
FIGURE 2 is a plan view of a grille assembly utilizing
the vane structure disclosed in FIGURE 1 land as shown,
illustrates a multiple assembly unit.
FIGURE 3 is a sectional view taken along lines 3-3
of FIGURE 2.
lFIGURE 4 is a side elevational view of the grille as
sembly structure illustrated in FIGURE 3.
FIGURE 5 is a sectional view of the grille assembly
taken along lines 5-5 of FIGURE 4.
FIGURE 6 is a sectional view of the grille assembly
by individually mounted means or by a novel arm or
[taken along lines 6-6 of FIGURE 5.
cross-piece structure. In this arrangement, the cross-piece 35
FIGURE 7 is a sectional view of the grille assembly
structure is engageable with each vane of the series pro
taken along lines '7—7 of FIGURE 5.
viding a unitary directional movement thereto and ac
Referring ‘directly to FIGURE 1, the vane structure
cordingly directs the flow of ?uid between the vanes.
10 disclosed therein comprises a base portion 12 having
Applicant, to accomplish the above provisions has
an extended end portion 14 at each end thereof, a neck
formed the vanes in a novel and distinct manner wherein
one end thereof at which the structure can be secured to a
portion 16 and an end portion 18 disposed adjacent and
integral with the neck portion ‘16. The configuration of
the vane is designed so that the end portion 18 will be
suitable frame, is of substantial thickness providing su?i
cient area for securement with an associated frame struc
ture. Adjacent the securing end portion is a neck portion
substantially reduced in thickness from that of the end
portion. Adjacent the‘ neck portion is the other end of
the wane structure which is of a substantially greater
thickness than that of the neck portion of the vane. There
fore, due to the neck portion intermediate the end portions
of the vane, the one end remote from the ?xed end can
be angularly repositioned about the base portion without
pivoting the entire structure and accordingly redirect the
?ow of ?uid between the vanes.
Therefore, it is a principal object of this invention to
provide a one piece ?exible‘ vane structure which can be
?xed at one end 1and still provide the desired angle of
de?ection of ?uid passing therebetween through the uti
capable of angular movement through an are about the
base portion 12 of the vane structure through the utiliza
tion of the ?exible neck portion v16. The vane as illus
trated, is shown in its un?exed position whereby the neck
portion is formed substantially perpendicular to the base
portion. The end portion 18 is formed at an acute angle
with the neck portion and laterally off-set with respect to
the base portion and has a pair of ?uid de?ecting surfaces
20 and 22 thereon. The formation of the angular rela
tionship between the recited portions of the vane is to
facilitate the molding operation and in particular, the
withdrawing and mold release step thereof. The ?exible
neck portion 16 is reduced in cross-sectional'thickness
with respect to the cross-sectional thickness of the base
portion 12 and the end portion 14 ‘and is deformable
lization of the ?exible characteristic of the structure.
about a longitudinally extending axis that is parallel with
It is another object of this invention to provide a one
planes coincident with the ?uid de?ecting surfaces 20
piece ?exible vanev structure which is composed of a re 60 and 22, respectively.
silient plastic or similar material enabling the ?exing of
The particular application of the vane- structure 10
the vane to be accomplished without permanent deforma
necessitates the utilization of a material capable of with
tion thereof.
standing use in a wide temperature range in which the
It is still another object of this invention to provide a
cell or crystalline structure thereof will not readily break
one piece ?exible vane ‘structure which can be mounted 65 down to destroy its inherent characteristics. ‘In a heater
and actuated either in a series or individual relationship
application, the material must be able to withstand high
whereby one end of the vane is ?xed to a frame or hous
temperatures in a range as high as 200r°—210° F. while in
in g and the ?exing of the structure is accomplished through
an air conditioner application, it must be ‘able to with
the utilization of the inherent ?exibility of the material
stand low temperatures in the range as low as 0°-5° F.
and the structural design of the vane.
A material capable of withstanding the extreme temper
It is a further object of this invention to provide a one
ature difference is the commercially sold polypropylene.
Polypropylene as used herein must be molded in a tem
ran gement of these units such that a pair of axially aligned
perature range speci?ed by the plastic manufacturer there
vertically directed sets of vanes are arranged adjacent to
a pair of horizontally directed sets of vanes to provide
of to obtain the inherent desired characteristics which
are discussed hereinafter.
a pair of combination horizontally and vertically directed
At the proper molding temperature range, polypropyl
ene while having good heat and cold resistant qualities
varied sub units.
in a wide temperature range has three de?nite desirable
characteristics which are referred to as a ?ectural modu
In placing the frames in a parallel relationship, suitable
means is provided which maintain the units secured to
gether. Applicant has provided a set of four (only three
showing) pins 38 formed from frame 26 and openings
istics are especially advantageous to applicant for the l0 40 formed in frame 28 whereby the oversized pins are
forced into the slightly undersized openings (as disclosed
speci?c purposes which are herein set forth. The ?ectural
in FIGURES 3 and 4) and thus secure the units together.
modulus relates to the ?exibility of the material and
The pins can be formed from the housing material and
polypropylene accordingly is suitably ?exible for the
accordingly, eliminate the necessity of additional parts in
vane application. Further, the ?ow characteristics fa
lus, ?ow rate and a stiffness of ?exture. These character
cilitate the molding of the vane to the desired con?gura 15 the assembly operation.
In FIGURE 3 and particularly in FIGURE 7, it can be
tion wherein the neck portion can be formed having a
seen that the horizontal vanes are disposed adjacent to
substantially lesser thickness than the end and base por
the vertical vanes in such a manner that the base portions
tions of the vane to consistently support same during
12 of the horizontal vanes directly intersect the vertical
the ?exing thereof. The stiffness of ?exture of the ma
terial provides therein a resilient characteristic which is 20 vanes at the end portions 18 thereof. The base portions
12 of the horizontal vanes are situated in a structural loca~
somewhat undesirable in the vane and accordingly must
tion such that the vertical vanes end portions 18 have a
‘be compensated for by additional structure in the grille
series of notches 42 therein to accommodate the lower
assembly. This resilient quality of the material necessi
most section of the base portions 12 of the horizontal
tates the provision of a means to maintain the vanes in the
desired position when a change in the direction of ?uid 25 vanes. By the positioning of the vertical vanes with
?ow therebetween is completed. A description of this
means will be described later in detail.
While the re
respect to the horizontal vanes or vice versa, it can be
seen that the notching of the vertical vanes enables a
grille assembly to have a substantially narrower width
dimension and still eliminate any interference of the
facturing thereof can be molded in one piece units and 30 angular movement of the vertical vanes. In comparison,
an assembly where to avoid interference between any
this inherent characteristic aptly lends itself to the pro
angular movement of the vertical vanes with respect to the
vision of a frame or housing for the vanes which is stable
base portion of the horizontal vanes it would be necessary
and as such, results in a rigid assembly presented in the
to space the two separate frames of the assembly to a
form of a grille.
noninterfering position; that is, the frames would have
Thus the material utilized is one which essentially
to have a width dimension whereby the vanes of the lower
readily withstands a wide range of temperature variation
most unit could be at a 90° angle with respect to their
before it will yield under load conditions and has a good
base portions and still not interfere with the adjacent set
?exture characteristic. Other materials which have these
of vanes. By providing this notch, the vertical vanes
characteristics can be used, but to applicant’s knowledge
polypropylene best satis?es the necessary requirements 40 can be placed through any angular movement to the point
silient characteristic is not altogether desirable in the
vane structure, the frame and vane elements in the manu
and accordingly, has formed the principal elements of the
grille from this material.
of being directly 90° with respect to the base portion (as
center portion thereof a ?xed strut or support member 30
shown in dotted lines in FIGURE 3) and still not be
obstructed by the base 12 of the horizontal vanes thus
FIGURE 2 and the sectional view FIGURE 3, illus
providing a more compact assembly. FIGURE 7 repre
trate a grille assembly which incorporates therein the
novel structural con?guration of the vane 10. The grille 45 sents the structural arrangement of the vertical and hor
izontal vanes and clearly discloses therein the notched
assembly 24 comprises a pair of frame or housing mem
portion of the vertical vanes which, as illustrated, receives
bers 26 and 23 (more clearly shown in FIGURE 3)
a section of the base portion therein of the horizontal
formed in a substantially rectangular shape having at the
which substantially partitions the rectangular frame mem
Referring to FIGURES 2 and 7, to simultaneously act
uate these vanes in a corresponding identical direction
bers into two parts. The arrangement of the vanes 10
with one another, it is necessary to have therein a means
in these respective frames is such that a pair of sets or
of arranging the vanes such that the de?ection of the ?uid
series of these vanes are axially spaced and disposed in
?owing therebetween will be in identical directions
a vertical direction between the longitudinal sides 32 and
34- and substantially parallel to the lateral sides 36 and 55 throughout the separate grille assemblies. To accomplish
this purpose, a set of four actuator blades 44, 46, 48, 50
37 of the frame 28 and are secured thereto by the ex
are utilized herein. A typical blade will be described as
tended end portion 14 of the base 12 of each vane. A
similar pair of series of vanes are axially spaced and dis
posed in a horizontal direction substantially parallel to the
Blade 44 comprises a main body portion 52 disposed
lateral sides 36 and 37 in the frame 26 and are secured at 60 adjacent a lateral end portion of the frame 26 of the grille
the extended end portions 14 of the ‘base to the lateral
assembly so that it is arranged at the axial end portion
sides 36 and 37 of frame 26 and the center strut or
support member 30. The vanes may be secured to the
of the horizontal series of vanes therein. The blade has
a number of projections thereon in the form of cylindrical
projections 54 and oblong shaped projections 56 whereby
frame sides and center strut either by a fusing operation
or it is possible that the individual frames of the assem 65 these projecting portions abut and engage the surfaces 20
and 22 of the vanes in the set so that the oblong projecting
bly and corresponding vanes can be formed in one mold
portions 56 as situated are disposed intermediate and abut
ing operation.
a pair of vanes and the cylindrical projections 54 are
The sections of the housing de?ning the horizontal vanes
positioned to engage one surface of a vane and thereby
and the vertical vanes thus further divide the assembly
any movement to the actuator blade body portion 52
into two separate units. The total assembly of the grille
will correspondingly move the projections which in turn
comprises two vertically positioned sets of vanes in one
will redirect the direction of ?ow of ?uid between the
frame and two horizontally positioned sets of vanes in
vanes through the angular arcuate movement of each end
another frame. The combinations of the units can be
portion of all the vanes of the set. It is necessary in the
varied and accordingly any desired arrangement can be
provided. Applicant has structurally presented an ar 75 formation of the blade that the number of projections
provided will accommodate the total number of vanes
arranged in the series to insure that all of the vanes will
move together.
The actuator blade 44 is disposed so that it will angu
in the arcuate guide 72 formed in the end portion 37
of the ?rame 26. The cross sectional area of the index
pin is also shown and it can be seen that upon rotation of
the wheel 66, the pin 68 will ride guide 72 as the Wheel
larly move the set of horizontal vanes disposed on the
rotates about the rivet 64 and as such, will effect a lateral
right hand section of the frame 26 while the [actuator
movement of the pin in the actuator blade. The lateral
movement of the pin with respect to the blade is effected
by a pair of slotted guideways 7 6 and 7 8 which are formed
in the end portion 37 of the grille assembly and function
to receive a pair of projecting portions 80‘ and 82, respec
tively, which extend from the actuator blade at the side
blade 46 is disposed so as to angularly move the hori
zontal vanes disposed in the left hand position lot the
grille assembly. Actuator blade 48 controls the vertical
vanes located on the right hand portion of the frame 28
of the grille assembly beneath the horizontal vanes ofv
thereof oppositely disposed of the projecting portions 54
the frame 26 and actuator blade 59 is operable to arou
and 56 extending between the end portions of the vanes.
ately and angularly redirect the vertical vanes on the
These guidevvays receive the projecting portions 80 and
left hand portion of the frame 28.
To direct each of these vanes, it is necessary to inde 15 82 and upon movement or the actuator blade by the wheel
pendently actuate the actuator blade and to accomplish
rotation, a reciprocating motion is imparted to the blade
this, an index wheel 58 is secured to each actuator blade
for the vertical set of vanes and an index wheel 60 is
secured to the blade for each set of horizontal vanes.
through the utilization of the projection engagement with
the guideways in the frame. Because of these projecting
portions, the actuator blade is limited in its direction of
Each wheel has a series of projecting ?ngers 62 thereon
which enable the operator to more readily grasp ‘the wheel
movement to a horizontal reciprocatory motion.
As above mentioned, the arcuate movement of the index
pin upon rotation of the index wheel results in a lateral
movement of the pin with respect to- the blade and this
for actuation. The manner in which the wheels are ?xed
to their respective frames vand to the actuator blades will
be described later in detail.
movement is compensated for by the dimensioned opening
It can be seen that any particular arrangement of these 25 74 formed in the actuator blade. Thus it can be seen
vanes can be utilized whereby it is possible to dispose the
that any movement of the index Wheel will create a cor
vertical vanes and the horizontal vanes such that they
responding movement along the guideway of the housing
need not be at a 90° angle with one another but may
which in turn will cause the pin extending through the
be positioned in any angular relationship as long as actu
guide 72 and in contact with the actuator blade to abut
ating means can be positioned and adjusted to effect ‘an 30 the peripheral portions of the opening 74 and thereby
identical direction of movement to each set of vanes or
impart movement to the actuator blade. Upon imparting
even an individual ‘actuation ‘Off the vanes, if so con
this motion to the blade, the cylindrical and oblong projec
structed, can be manged. For simplicity sake, the vane
structures are shown in a 90° relationship with ‘one ari
lother, that is, the horizontal and vertical vanes are at a
90° angular spacing. FIGURE 3 of the grille assembly
illustrates the angular relationship of the vertical vanes
with respect to the horizontal vanes and also indicates
therein an end portion of the actuator blade 46 which
is controlled by a corresponding index wheel 60 and as
illustrated, a cylindrical projection 54 at one end of the
blade is abutting surface 20 ‘of one of the horizontal
tions 54 and 56 extending between the horizontal vanes
will e?ect movement to the end portions of each vane to
be angularly disposed with respect to the ?xed end thereof
in such a manner that the ?uid ?owing therebetween will
be redirected.
A slot 84 is formed in the actuator blade as disclosed in
FIGURE 5 and in FIGURE 7 and is positioned in such
a manner that the rivet 64 will not obstruct the blade in
any horizontal movement thereof.
Again referring to FIGURE 5, it is necessary in the cor
rect operation of the redirecting of the ?ow of ?uid be
vanes for redirecting same at the ‘discretion of ‘the oper
ator. Index wheel 58 is also disclosed therein which
tween the vane structures to provide means to maintain
actuates the blade 48 of frame 28 on the right hand 45 the new location ‘of the vanes in the desired position and
portion of the grille assembly.
accordingly to provide a means to prevent the vanes from
Further description of the operation of the actnator
blades, the index wheels, and the method of redirecting
returning to their as molded position. Therefore, to ac
complish this purpose, applicant has provided a means ar
the vanes as disclosed in the grille assembly will now be
ranged on and including the index pin ‘68 which comprises
described and directed to a portion of the ‘grille assembly 50 a spring washer 86 disposed adjacent the head portion 88
limited strictly to ‘one of the pair of horizontal series ct
of the index pin and a ?at washer 90 disposed intermediate
vanes disposed in frame 26. FIGURES 4, 5, 6 and 7 dis
the actuator blade and the spring washer 86 on the index
close the above referred to portion of the grille assembly
pin 68. A similarly con?gurated head 92 is formed on
illustrating the actuator blade 44, the index wheel to, and
the end of the pin 68 remote from head portion 88 and is
the elements thereof which enable the ‘operator to select 55 in engagement with the index wheel 60. The spring
the angular disposition of the end portion of each blade
washer 86 reacting against the index pin head 88 and the
so ‘as to direct the ?ow of ?uid therebetween in the de
?at washer 9t) eifects a compressive loading on the actua
sired direction.
tor blade which in turn is held ?rmly against the end por
FIGURE 4 is an end view of the grille assembly dis
tion 37 of the frame 26. This applied loading to the
closed in FIGURE 3. In this view, the ‘operation of 60 blade functions as a drag on the rotation of the index
the actuator blade 44 is accomplished by rotation of the
wheel transferred through the index pin and accordingly,
index wheel 69 in- a counterclockwise direction. A rivet
movement of the wheel will be su?iciently resisted by the
‘64 is disposed through an opening 66 formed in the index
frictional engagement of the blade with the end portion
wheel 60 to provide the pivot point therefor. FIGURE
37 of the frame.
5 more clearly illustrates the manner in which the lactu~ 65
Thus the operator, when a change in the direction of
ator blade and the index wheel are arranged. This is
?uid ‘?ow is desired, need only apply su?icient pressure
accomplished by the insertion of 1an index pin 68 into an
in rotating the wheel to overcome the spring washer load
opening 7 0 formed in the index Wheel, a guide 72 formed
ing on the blade. When the desired arcuate movement
in the ‘lateral end 37 of ?rarne 26 and an opening '74
of the vane ends has been obtained, the vane ends will
formed in the central portion of the actuator blade. The 70 remain as positioned since the spring washer loading ap
index pin is operable to move in an :arcuate manner along
plied is of a greater compressive force acting on the blade
with the wheel rotation as it rotates about rivet 64 such
end than the resiliency of the material of the vane tend
that it is necessary to dimension the opening 74 to ‘facili
ing to return the vane end portion back to its as molded
tate the lateral movement of the pin with respect to the
While this invention has been described in connection
blade. In FIGURE 6, as illustrated, the ‘index pin rides
with certain speci?c embodiments, the principle involved
affect a movement therein upon movement of said second
means; said ?rst means being operable to arcuately move
said end portions of said vanes so as to angularly dispose
is capable of numerous other applications that would
readily occur to persons skilled in the art. The invention,
therefore, is limited only as indicated ‘by the scope of the
appended claims.
What I claim is:
1. A ?exible vane for directing the ?ow of ?uid ?ow
ing thereover, comprising: a base portion; a substantially
said end portions about said base portions by a ?exing
of said neck portion.
5. A grill assembly comprising a frame assembly, a
?rst series of parallel ‘arranged ?uid de?ecting vanes and
a second series of parallel arranged ?uid de?ecting vanes
integral with said frame assembly, each of said vanes
rectangular end portion spaced from said base portion
and having a plurality of ?uid directing surfaces thereon; 10 comprising a base portion, an end portion and a neck
portion disposed therebetween, said base portion having a
a ?exible neck portion formed integral and substantially
cross-sectional thickness substantially the same as said end
coextensive with said base portion and said end portion
portion with said end portion having a substantial area
respectively; said ?exible neck portion being deformable
thereon forming a ?uid de?ecting surface, said neck por
about a longitudinal axis disposed substantially parallel
to a plane coincident with at least one of said ?uid direct
ing surfaces; said ?exible neck portion having a minimum
cross-sectional thickness substantially less than a mini
mum cross-sectional thickness of said base portion and
said ?uid ‘directing end portion when considered in a
a plane normal to said longitudinal axis; said ?uid direct
ing end portion having a linear dimension parallel to
said longitudinal axis which is substantially greater than
any linear dimension of said ?uid directing end portion
disposed normal to said longitudinal axis; said ?uid di
recting end portion, in a non-?exed condition having at
least one of said ?uid directing surfaces disposed in a
tion having a thickness substantially reduced with respect
to said end portion said end portions of said ?rst series of
vanes being disposed adjacent to and in overlapping rela
tion With said base portions of said second series of vanes
such that the ?uid being de?ected thereby is directed
through said ?rst and said second series of vanes respec
tively and means engageable with one end of each of said
series of vanes to arcuately position said end portions
about said base portions by a ?exing action of said neck
6. A grille assembly comprising a ?rst frame member
having a pair of sets of vanes being substantially hori
zontally directed and secured ‘to said frame, a second
frame member having a pair of sets of vanes being sub
plane substantially parallel to said longitudinal axis and
laterally off-set with respect to said base portion whereby
stantially vertically directed and secured to said frame,
positive movement of said ?uid directing ‘end portion
varies the angular disposition of said end portion with 30 said ?rst and second frames being secured together such
that the pair of sets of the horizontally directed vanes are
respect to said base portion by the ?exing of said neck
laterally spaced from the pair of sets of the vertically di
portion with the ?uid directing end portion remaining
rected vanes, separate actuating means mounted on said
in a substantially undistorted shape.
2. A ?exible vane for directing the ?ow of ?uid ?ow
ing thereover according to claim 1 wherein said vane is
series of vanes, each of said means comprising an actu
formed from a ?exible material such as polypropylene.
3. A ?exible vane for directing the ?ow of ?uid ?ow
ator blade and an index Wheel, said actuator blade being
engageable with an axial end ‘of each of said vanes of said
frames for controlling vane movement of each respective
respective series to simultaneously move said vanes in an
ing thereover according to claim 1 being molded in a
identical direction, said vanes comprising a base portion,
one-piece structure wherein said ?uid de?ecting end por
tion by being laterally off-set with respect to said base 40 an end portion and a neck portion integral therewith, said
base portion having a cross-sectional thickness substan
portion enables said vane to be released from its mold.
tially the same as said end portion with said end por
4. A grill assembly comprising a frame assembly; a
series of ?uid directing vanes secured to said frame as
sembly; each of said vanes comprising a base portion, a
tion having a substantial area thereon forming a ?uid de
base portion and having a plurality of ?uid directing
said actuator blades arcuately moves said vane end por
tions of each vane of said respective series about said se~
?ecting surface, said neck portion having a thickness sub
substantially rectangular end portion spaced from said 45 stantially reduced with respect to said end portion, each of
surfaces thereon and a ?exible neck portion formed in
cured base portions through a ?exing of said neck por
tegral and substantially coextensive with said base portion
and said end portion respectively; said ?exible neck por
7. A grille assembly according to claim 6 wherein said
tion being deformable about a longitudinal axis disposed 50
vanes of said ?rst frame are integral therewith and said
substantially parallel to a plane coincident with at least
vanles of said second frame member are integral there~
one of said fluid directing surfaces; said ?exible neck por
wit .
tion having a minimum cross-sectional thickness sub
stantially less than a minimum cross-sectional thickness of
References Cited in the ?le of this patent
either said base portion or said ?uid directing end portion 55
when considered in a plane normal to said longitudinal
axis; said ?uid directing end portion, in a non-?exed con
Wenink ______________ __ Aug. 9, 1910
dition ‘having at least one of said ?uid directing surfaces
Abrahamsen __________ __ Feb. 21, 1956
disposed in a plane substantially parallel to: said longi~
tudinal axis and laterally o?-set with respect to said base
portion; a ?rst means mounted on said frame member
engageable with one end of said vane end portions; a
second means connected to said ?rst means operable to
Parrish _____________ .._ May 10, 1960
Stinson _______________ __ Feb. 6, 1962
Great Britain _________ __ Nov. 10, 1954
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