close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3077003

код для вставки
Feb. l2, 1963
J. w. ANDERSON
3,076,993
WINDSHIELD WIPER BLADE
Filed Oct. 24, 1958
2 Sheets-Sheet 1
(Kim
_
INVENTOR
JOHN W. A NDERsoN
BY/a'f. MMM A
Q0. 711C 1J, «
c. S. P
’- 'f
ATTORNEYS
Feb, 12, 1963
J. w. ANDERSON
3,076,993
WINDSHIELD wIPER BLADE
Filed oct. 24, 195e
2 Sheets-Sheet 2
__
'
YzNvmTok.
JOHN W. ANDERSON
:SY/¿12W
,
.
Q_ ¿ggg 7241?»,
C', 5.
TORNEVS
United States Patent Gtiîce
fi
envases
YVINDSHEELD ‘lil/EPEE? BLADE
John W. Anderson, 57S Broadway, Gary, Antl.
Filed Get. 2d, i958, hier. No. ’769,404
i3 (Claims. (Cl. .l5-_256.4%
This invention relates to a windshield wiper assembly
and more particularly to an improved wiper assembly
for wiping dat, curved, and/ or wrap-around Windshields
and to an improved method of making same.
An object of the invention is to provide simple means
by which the relative ilexibility of various longitudinal
portions of a flexible backing strip for a wiper for curved
windshields may be varied to conform to varying curva
itures of the windshield.
A further object of the invention is to provide a
method by which a portion of the ileXor, or backing strip,
of a wiper blade tor curved windshields, may be in
creased in effective length and in flexibility without sub
stantially increasing the over-all length of material re~
quired to produce the flexor, or backing strip, thus to
attain greater iiexibility in said portion for more ready
and more extended response to wiper arm pressures trans
mitted thereto.
A further object of the invention is to provide a
method of manufacture whereby the ilexibility of a pre
determined portion of a flertor, or backing strip, may be
changed by forming such portion so as to increase its
effective length i i e at the same time changing the thick
ness of the material in said portion, whereby to alter
the resistance of the tlexor, or backing strip, to flexing
under pressure transmitted thereto from the wiper arm.
Another obiect of the invention is to provide a flexor,
or backing strip, in which the flexibility oi diíîerent por
tions thereof is reduced or increased respectively to pro
vide a combination of longitudinal and transverse defor
mations of the material from which sai-d strip is made.
A further object of the invention is to provide means
by which variations in the degree of conformability ci
different longitudinal portions of a wiper blade, in main
taining contact of said blade, throughout its length, with
la windshield surface of varying degrees of curvature,
may be accomplished without the employment of aux
iliary springs or of members iniluenced thereby.
A further object of the invention is to facilitate con
formity of a wiper blade to varying degrees of curvature
of a surface to be wiped without substantially varying
the width of the ilexor, or backing strip, throughout its
Bßîëßäß
Patented Feb. l2, liëâß
2
In the drawings:
FIGURE l is a side View in elevation of a preferred
form of my improved windshield wiper blade assembly as
applied to a windshield;
FIGURE 2 is an enlarged view of the right-hand por
tion of the full assembly of FIGURE. l removed from the
windshield;
FLJURE 3 is a bottom view of the backing strip or
iiexor of FiGURE l together with the underengaging slid
ing claws at the ends of the pressure-transmitting means;
FIGURE 4 is a side view of the ilexor of FIGURE 3;
FIGURE 5 is a cross-sectional view taken along the line
5--5 of FÍGURE 2;
FÑGURE 6 is a partial cross-sectional View taken along
the line 6_6 of FIGURE 2;
FlGURE 7 is a side view of a modified form of my irn
proved windshield wiper blade assembly;
FiF-,URE 8
an enlarged view of the right-hand por
tion of the full assembly of FIGURE 7;
FEGURE 9 is a bottom view of the backing strip or
flexor of FÍGURE 7 together with the underengaging slid
ing claws at the ends of the pressure-transmitting means;
FlGURE l0 is a side view of the iiexor of FIGURE 9;
FEGURE ll is a cross-sectional view taken along the
line ìl--ll of FEGURE 8;
FEGURE l2 is a cross-sectional view taken along the
line l?, l2 of FEGURE 8; and
FlGUlìE i3 is a cross-sectional view taken along the
line 13a-i3 of FlGURE 8.
Referring more particularly to FIGURES l~6 of the
drawings, the windshield wiper assembly is generally desig
nated lil and is comprised of a wiper blade ll and a
pressure~distributing device l2. The wiper blade l1 is
comprised of an elongate resiliently tlexible support, back~
ing, or fleXor T13 and a resilient rubberlike wiping element
ld carried by the support. The pressure-distributing or
transmitting device l2 may be constructed in various ways,
but as herein illustrated preferably includes a pair of cor
responding secondary yokes l5 and 16 having their ends
slidably connected to the blade l1, a primary yoke 17
having its ends connected to intermediate portions of the
secondary yokes, and a connector 1S carried by the pri
mary yoke for connection with the end portion of a
windshield wiper arm i9.
The fleXor i3, as will be described in detail hereinafter,
is elongate and has corresponding end portions 2l and 22
and an intermediate portion 23 of a greater width than
the end portions. This variation in width forms shoulders
length.
which provide longitudinally spaced abutment means 2,5
50
A further object of the invention is to provide a flexor,
and 2.6. The support or llexor 13 is preferably provided
or backing strip, for wiper blades for nonflat windshields
with an elongate narrow slot 28 terminating short of the
in which both linear and transverse deviations in the
ends of the support to provide connecting or hinge portions
shape of the material used may be eiîected economically
29 whereby longitudinal parallel side portions 30, 31 of
in a single forming operation.
the support can be spread apart to enlarge the size of the
A further object of the invention is to provide an im 55 slot so that the resilient element 14 can properly be lo
proved wiper blade, a portion of which, adjacent an eX
cated therein, after which the longitudinal portions 3i), 31
tremity thereof, conforms readily to comparatively abrupt
are released to cause such portions to interlock with the
curvatures in the outwardly extending portions of the
element ld. Due to the character of the support or flex
surface to be wiped.
or, the blade is primarily limited to ilexation or movement
60
A still further object of this invention is to provide a
in a direction substantially perpendicular to a surface of
wiper assembly that is suiliciently flexible to conform to
the windshield to be cleaned.
the surface being wiped and is sufficiently inflexible in por
The wiping element 14 is provided with. an attaching
tions thereof to prevent such portions :from lifting from
or back portion 32 and a wiping portion 33 which is
the windshield, particularly under the influence of wind
joined to the attaching portion by an intermediate re
currents and the like.
stricted portion or web 34 so as to permit tilting of the
And yet another object of this invention is to provide
wiping portion. The attaching portion is provided with a
an improved wiper assembly of simple construction and
pair of corresponding grooves 35, one being located adja
operation, which is not only more economical to manu
cent each side of the attaching portion in a predetermined
facture, but also is etlicient in use.
Other objects and advantages of the invention will be 70 position so that they lie substantially in the same plane.
The grooves 35 receive the interrnarginal edge portions of
come evident after considering the description hereinafter
set forth in conjunction with the drawings annexed hereto.
the longitudinally extending portions 30, 3l of the support
3,076,993
¿i
El
sembled with the pressure-transmitting device 12. The re«
for holding the support or flexor is and element llt
sulting ñexor 13 has the usual degree of flexibility
assembled.
throughout the uncorrugated portion of the liexor and
The secondary yokes 15 and lid are preferably identical
has a substantially increased degree of flexibility through
in design and construction. The inner end of the base
wall of each secondary yoke is formed to provide a trans Ul out the corrugated end portion Z2 of the tlexor.
The incorporation of the corrugations 4,2 into the ilexor‘
verse arcuate or curved end 35 and a pair of correspond
has the effect of increasing the effective length of thel
ing ears or claws 37. The outer end of each secondary
ilexor Without substantially increasing or decreasing the>
yoke is provided with a shroudlike end wall 38 which
actual length thereof. In one preferred method of form»
serves to conceal the ends of the support. The outer end
ing the corrugations into the tiexor, two matching corÍ
of each of the secondary yokes l5, i6 is also provided
rugated dies, equal in length to the desired length of the
corrugated portion of the flexor, are simultaneously'
forced together against the interposed end portion of the.`
with a pair of ears or claws 39 spaced inwardly from
the end wall 38. When assembled with the blade, the
pairs of ears or claws 37 and 3‘9 of the yoke l5 extend
over the reduced extremity 2l of the support or flexor
13 and 'the corresponding ears or claws 37 and 39 of the
yoke 16 similarly extend over the extremity 22 of the
ilexor. increments of the end portion of the ñexor areI
simultaneously stretched and bent between the dies to*
thereby form successive ridges and valleys resulting inv
the corrugated shape. 'the stretching of the metal of the
end portion adds effective length to the liexor, but due
to the bending into the corrugated shape the actual length
support or ilexor to effect a sliding feature between the
yokes and the support. rThe secondary yokes 1S and Elo
are preferably assembled with the support by merely
sliding the yokes inwardly along the extremities of the 20 of the flexor remains substantially the same. Simultane
ously, the stretching of the metal of the corrugated por
support until the inner ends of the yokes engage the abut
tion also reduces the thickness of the metal in the corru
ment means, after Which the primary yoke 17 is attached
to the secondary yokes in a manner shown and described
gated portion by comparison to the uncorrugated portion
or portions of the flexor. r[he result of both the increase
in the effective length and the reduction in the thickness
of the said end portion of the flexor is to substantially
in my copending application Serial No. 609,633., filed
September 13, 1956, now Patent No. 2,955,3l3.
It is to be understood that the invention is not intended
increase the flexibility of said corrugated end portion of
to be limited to the above-described pressure-transmitting
`system or to the particular shouldered ilexor, these ele
ments being shown and described for illustration pun
the iiexor.
poses only.
yoke i5, is therefore more flexible in a direction substan
The corrugated end portion 22;, beneath the secondary
'
tially perpendicular to the plane of the ñexor and, when
The flexible support or flexor i3 is provided with a
means whereby different degrees of flexibility are intro
duced into the fiexor during manufacture of the ñexor to
assembled with the rubber element of a blade, results in
a blade having different degrees of flexibility at prede«
ermined portions along its length to meet the demands
to be placed upon the wiper assembly with which the
ñexor is to be used.
satisfy the particular wiping requirements of the blade
assembly with which the lieXor is to be used. rthat is,
on a windshield with an extreme curvature, particularly
on the outboard side portion thereof, it is necessary for
Since the corrugations ¿i2 may be formed simultaneous~4
the wiper blade 11 comprising the wiping element 1.4% and
ly by the same stroke of the press that cuts or forms other’
the ilexor 13, lying substantially beneath the outwardmost
parts of the ñexor, as the material is fed progressively
secondary yoke 16, to flex or bend in the plane lying sub 40 into the press, the corrugating operation adds no cost
stantially perpendicular to the surface of the Windshield
to the production of the flexor. Thus, the ilexor embod~
ied in the present invention produces a substantially im
to a much greater extent than for older type curved wind
proved result when incorporated in a wiper assembly
shields. By providing the iiexor 13 with a more freely
ñexible portion in the area where greater and more severe
without in any way increasing the cost of producing the
flexing isY required and by maintaining the balance of the
flexor. Likewise, an improved reiill assembly of the type
fiexor or support with a lesser degree of flexibility, a wiper
described and claimed in U.S. Patent No. 2,782,445 re
blade is produced that conforms throughout its length to
more sharply curved surfaces of a windshield, such as
sults from the incorporation in said reñll of the inventive
concept above described.
are encountered in wrap-around type windshields.
In one preferred form, such as shown in FlGURES
1-6, inclusive, the one-piece ilexor iff is shown with the
by the wiper assembly lll are those traversed by the outer
end portion of the blade, where reduced resistance to
claws 37, 39 of each secondary yoke l5, le embracing
the `edge portions ofthe reduced end portions 2l, Z2,
the blade to conform to the surface of the windshieid be
respectively, of the ñexor. The end portion 22 of the
ing wiped, The surface area of the glass traversed by the
ñeXor 13 has corrugations 42 formed therein in a direc
mid-portion of the blade, i.e., that portion lying between.
the respective inner claws 37, 37 of the secondary yokes'y
l5, lo, is usually less abruptly curved and, therefore,
yless llexibility in the íiexor is required. The mid-portion.
Maximum curvatures of the windshield encountered
iiexure, occurring under the outer secondary yoke, assists
tion lying substantially perpendicular to the longitudinal
axis of the flexor 13 throughout substantially the length of
said reduced end portion 22. The corrugations ft2, in the
preferred showing, are preferably of a wave formation
of the blade wipes the somewhat more critical area'of the-v
having substantially straight, parallel, regular, and equal-v
60 windshield directly in the line of vision of the driver and
ly curved ridges 43 and valleys 4d, as best shown in FÍG
URES 2 and 4._ The corrugations 42 caribe produced
during the forming of the flexor and have the effect of
reducing the resistance of the end portion 222V to ñexing,
which has a greater range of adaptability to purposes de 65
is the portion ordinarily more susceptibie to lifting oif'
the glass through pressure of air currents encountered>
against the windshield indriving. it has been found that
by maintaining, in that portion or segment of the iiexor:
lying between the secondary yokes, the prevailing stand
y?ned herein than does reducing either the width‘or the
thickness of the material of which the Ílexor is made.
ards'of resistance to flenure, with reiation to the length,
design, and dimensions of the blade assembly, that seg
ment has satisfactory resistance to normal windlift and
As referred to above, fleXor 13 may be made from a
piece of material of substantially uniform standard thick
otherwise, under normal» driving conditions, remains in
ness normal for a particular wiper assembly. The trans~ 70 effective opertative contact with the windsbieid. ' it per:
verse corrugations 42 herein proposed are added simul
haps should be pointed out that the predetermined pres
taneously to each side portion 3i?, 3l throughout substan
sures, at the foar contacts oi the pressure-distribating
tially the length of the end portion 22 of the tiener so as
assembly with the tiener, remain substantially constant,
to preferably terminate just short of the inner claws 37
so that while a ni
and outer claws 39 of the secondary` yoke il@ when
spends _effectively to sha n
flexible segment of the
e
3,076,993
5
each end of each relatively more flexible portion are
normal, predetermined pressures that substantiaily insure
satisfactory conformity of the wiping edge of the rubber
element to the windshield throughout the entire length
of that element and throughout the entire stroke of the
blade.
it will be understood that when the iiexor (as has been
practiced heretofore) is of the same thickness through
out its length the need for greater iiexibility to cause the
portion e2 and a wiping portion 63 which is joined to the
attaching portion by a web dit so as to permit tilting, of
the wiping portion relative to the attaching portion. The
attaching portion 62 is provided with a pair of correspond
ing grooves 66, one being located in each side of the at
taching portion in a predetermined position so that they
lie substantially in the same plane. Near each end of
each groove 6e in the attaching portion 62 of the element
5S is an abutment 67 extending transverse to the base
"lade to conform to the sharper outer curvatures of a 10 of the groove whereby the ends of the grooves are closed.
wrap-around Windshield might force a decision to adopt
Grooves 66, with the ends closed as at 7, are sometimes
a uniform thickness ot the iiexor, generaliy too thin to
referred to as blind grooves or pockets.
hold the middle portion of the rubber ñrmly enough to
FÉGURES 9 and l() illustrate the modified form of ílexor
the glass to prevent windlift and chatter of the blade at
54 adopting the teaching ot` my invention to a two-piece
higher car speeds. Thus, it may be seen that no uniformly 15 type ilexor. The lienor .f5-t has two unattached indepen
desirable compromise in ñexor thickness as between these
dent sides 7i, 72 each with corresponding end portions
extremes has been readily attainable in the art. ri`he
73, '74 and an intermediate portion 7S delineated from the
present invention, however, permits any desired diiîer
end portions by abutment surfaces 77, 7S formed in one
ential in flexibility of any predetermined longitudinal
edge of each side ’71, 72. rEhe end portions have cor
portions of the iiexor, to promote conformity and prevent 20 rugations ’79, which are similar to the corrugations of
“mid lift” of the blade, without adding to the cost of
FÍGURES l-6, and are comprised of substantiaily straight,
producing the blade.
parallel, regular, and equally curved ridges 3€) and val
Most windshields currently in use and projected for
leys 81.
future use have surface portions in the vicinity or” the wiper
The respective sides 7i, 72 of the tiexor are partially
shaft which are substantially flat or are only moderately 25 nested in the grooves 6e with the edges containing the
curved so that one end portion of the blade assembly need
abutments 77, 73 projecting outwardly from the wiping
not be any more iiexible than the central portion of the
element 55S. Each secondary yoke 5'7 and 5S has a pair
blade. The one preferred form shown in FIGURES l
of claws S3 formed on the inner end portion 8d thereof
to 6 is of the type just described, namely, one end portion
and a pair of claws 85 formed on the outer shrouded end
Zi is inherently more tiexible than the mid-portion 23 of 30 portion 8o thereof. ’ille claws 83 and 35 on secondary
the iiexor and blade. The other end portion Z2 of the
yoke 57 engage around the edges of the reduced end por
flexor is corrugated at 5.12 to increase the flexibility thereof
tions ‘73 of the sides of the iiexor 5d, and the claws £3
so that the blade in the vicinity of the corrugations more
and 5s“ on the other secondary yoke
engage around
readily conforms to the sharp wrap~around curvatures of
the other reduced end portions '.74 of the sides of the
35 iiexor
the windshield.
for hoiding the sides 721, 12 of the iicxor Se
ln the windshield wiper replacement market, there are
seated in the blind grooves ed. The abutments d? at the
a 1:arge number of wiper blades sold that may be installed
ends of the grooves en prevent the sides 7i, 72, of the
on a wiper arm as readily with one end or" the blade out
iie‘xor
from sliding out of the ends of the rubber eie
ward as with the other end outward. it is, therefore, de
rnent. The primary yoke 59 is attached to the yoices 57,
sirabie to provide, under each secondary yoke, the same 40 Sis for holding the pressure-transmitting device bf2 assen ñexibility since it is impractical to rely upon servicemen
bled on the tlexor 5e of the wiper biade 5l.
or car owners to select one or the other end of the blade to
in the modiiied form or” my invention, the corrugated
install in the outboard position. Accordingly, it is to be
rtion 'T9 terminates just short of the inner and outer
qu
understood to be within the scope of this invention to have
f fait, d5, respectively, of the secondary yolres v57, Sti.
corrugations ft2 at either end portion, at both end por 45 ne folies 57,
are free to slide, within operative limits,
tions, or at any larger or smaller increment of the length
on said flerror. The ridges fit? of the corrugations 79 are
of the blade to arrive at any desired result with respect to
adapted to engage the one wall of the grooves 66 and
varying degrees of iiexibility throughout the length of
the valleys Si of the corrugations are adapted to engage
the blade.
the other wali of the grooves o6 during normal conditions
in my copending application Serial No. 710,598, ¿ed
of use of the wiper blade and wiper assembly.
January 23, 1958, now abandoned, l have disclosed a way
The modiiication of FEGURES 7-13 performs all of
to increase the resistance of portions of a iieXor to flexing
’no novel functions attributed to the preferred form shown
in a particular plane by adding longitu inally disposed.
channels or ribs in the sides or” the ilexors.
The channels
serve as stifiening members so as to decrease the tieni
bility of the portions receiving the channels. it is to be
in
1_6. The corrugations ’79 can be added to
the liexor 5d at no extra cost to produce a blade that
readily conforms to surfaces to be wiped.
Having thus described my invention, it is obvious that
understood to be included within the scope or“ this in
various modiíications may be made in the same without
vention to incorporate transverse corrugations in a portion
departinr.7 from the spirit of the invention, and, therefore,
or portions of a ñexor to increase the ñexibiiity of that
i do not wish to be understood as limiting myself to the
portion or portions of the llexor and also to incorporate 60 exact form, construction, arrangement and combination
longitudinal channels in another portion or portions of
of parts herein shown and described.
the ñeXor to reduce the flexibility of that portion or por
E claim:
tions of the iiexor.
l. A iiexible backing member for a windshield wiper
FÉGURES 7-13 illustrate a modified form of my in
blade adapted to wipe curved windshields, said member
vention wherein a wiper assembly Si) comprises a wiper 65 having at least two adiacent longitudinal portions with a
blade 5l and a pressure-transmitting device 52. The wiper
plurality of undulations extending above and below the
blade 5l is comprised of an elongate ñexible support or
plane of said backing member along axes lying substan
ilexor 54» and a resilient rubberlike wiping element 55 car
tially perpendicular to the longitudinal axis of one of
ried by the support. The illustrated pressure-transmitting
said portions for reducing resistance to ñening in one of
device 52 is comprised of a pair of secondary yokes 57, 70 said portions.
53 and a primary yoke 59 connected to the intermediate
2. in a wiper blade for curved ‘windshielda a resilient
portions of the yolzes 57, 53. A connector 6b` is carried
rubberliiie elongate wiping element, a resiliently and re
by the primary yoke for attaching the wiper assembly
to a windshield wiper arm.
The wiping element 55' is provided with an attaching
versely ñexible elongate pressure-transmitting backing
strip associated coactively therewith, said backing strip
having a pluraiity of readily iiexible adjacent and integral
andasse
7
portions substantially equal in width, at least one of said
formed in at least one of said portions whereby to reduce
portions having corrugations thereon, said corrugations
the resistance to flexing in said last-named portion, said
comprising a plurality of undulations extending above and
below the plane ot said backing member along axes sub
stantially perpendicular to the longitudinal axis of said
portion for substantially reducing the resistance of that
portion to flexing relative to an adioining portion of the
backing strip whereby to produce in the blade a greater
corrugations being defined by continuous adjacent de
formations `out of the plane of the backing strip.
9. Fexible backing means for a windshield wiper ele
ment which is adapted to wipe a windshield having an
irregular surface, said tlexible backing means being elon
and adapted to be disposed generally coextensive with
the wiper element, said ilexible bacl'ing means having at
least one longitudinal portion provided with a. plurality
of transversely disposed undulations extending above and
below the plane of said longitudinal portion for reducing
resistance to llexure in said longitudinal portion.
inherent ability to conform to a surface.
3. A flexible backing member for a windshield wiper
blade adapted to wipe curved windshields, said backing
member being relatively ilexible in a plane substantially
normal to the windshield and relatively inflexible in a
plane transverse thereto, said backing member having at
l0. ln a windshield wiper blade the combination of a
resilient elongate wiping element having a wiping portion
and a back portion spaced from said wiping portion, a
flexible elongate backing member engaging with said back
portion of said lwiping element for coaction therewith,
said backing member being ñexible in a plane substan
least two longitudinal portions, one ot said portions hav
ing a greater effective length than its over-all length and
being thinner constant throughout its length in the verti
cal dimension than at least one of said other portions
whereby to produce a greater degree of ilexibility in said
tially normal to the windshield and relatively iniiexible in
one portion than in the other.
4. A flexible backing member for supporting the wiping
element of a windshield wiper blade for curved wind
a plane transverse thereto, said backing member having
at least one longitudinal portion corrugated transversely
shields, said backing member being relatively Ilexible in a
plane substantially normal to the windshield and relatively
thereto, whereby to cause a difference in the inherent re
sistance to ilexure of said longitudinal portion of the ilexi
le member to accommodate differing degrees of curva
inilexible in a plane transverse thereto, said backing niem
ber being manufactured from a material of a thickness
ture of different areas of the surface of a windshield to
be wiped, and pressure-distributing structure applying
pressure to said backing member at longitudinally spaced
required to provide the minimum of flexibility desirable
for at least one longitudinal portion of said backing men -
apart portions thereof to distribute pressure of a wind
ber, another longitudinal portion of said backing mem
ber being given additional etîective length and less thick 30 shield wiper arm to the blade, said corrugations being of
ness by reversely corrugating said portion whereby to pro
continuous sinusoidal shape.
ll. ln a wiper assembly comprising a pressure-dis
tributing device operatively connected with a wiping blade
comprising resilient elongate ílexor means having end por
5. ln a wiper blade for curved windshields, a resilient
rubberlilre elongate wiping element, a resiliently and re 35 tions and an intermediate portion adapted to cooperate
versely flexible elongate pressure-transmitting backing
with said blade, said ilexor means being relatively flexible
vide less resistance to llexure in said last-named portion
than in said first-named portion.
strip associated coactively therewith, said backing strip
in a plane substantially normal to the windshield and be
being relatively flexible in a plane substantially normal to
ing relatively inflexible in a plane transverse thereto,
the windshield and relatively inilexible in a plane trans
transverse sinusoidal oorrugations formed in at least one
40
verse thereto, said backing strip being fabricated from
end portion thereof, said end portions of the iiexor means
material of substantially uniform thickness and having a
being operatively connected at spaced points to said pres
plurality of readily flexible portions substantially equal
sure-distributing device to receive pressure therefrom.
in width, at least one oí said portions having transverse
l2. A windshield wiper assembly comprising a pressure
sinusoidal corrugations whereby to produce a greater de
transi-.itting member operatively connected with a wiper
blade, said wiper blade having a resilient elongate wiping
gree of flexibility therein.
6. ln a wiper blade for curved windshields, a resilient
element with a wiping portion and a back portion, ilexible
rubberlike elongate wiping element, a resiliently rlexible
elongate backing means for said wiping element for co
elongate pressure-transmitting backing strip associated co
action therewith, said backing means being relatively ilexi
actively therewith, said backing strip being relatively ilexi
ble in a plane substantially normal to a windshield to be
ble in a plane substantially normal to the windshield and
relatively inñexible in a plane transverse thereto, said
wiped. and being relatively inflexible in a plane transverse
thereto, transverse corrugations formed in at least one end
portion of said backing means, said transverse corruga
tions comprising a plurality ot adjacent curved means
formed out ot the pla. e or” said backing member along
backing strip having a plurality of adjacent readily flexible
portions substantially equal in width, at least one of said
portions having transverse continuous sinusoidal shaped
corrugations whereby to produce a greater degree of 55 aries lying substantially perpendicular to the longitudinal
axis of said backing means whereby said one end portion
ilexibility therein.
7. ln a wiper blade for curved windshields, a resilient
rubberlilte elongate wiping element, a resi .ently and re
versely ñexible pressure-transmitting bac ring strip associ
ated coactively therewith, said backing strip being rela
tively ñexible in a plane substantially normal to the wind
shield and relatively iniiexible in a plane transverse there
to,'said backing strip having a plurality of longitudinal
portions, at least one of said portions having eorrugations
transversely disposed relative to the longitudinal axis of
said blade whereby to produce in said last-named portion
a diiierent inherent resistance to flexure, said corrugations
defined by adjacent continuous curved sections.
8. In a wiper blade for curved aviiidshields, a resilient
rubberlike elongate wi -ng element, a resiliently ilexible
backing strip associated coactively therewith, said backing
strip being iiexible in a plane substanL ally normal to
the windshield and being inflexible in a plane transverse
thereto, said backing strip having a plurality of longi
tudinal portions, a plurality of transverse corrugations
of the backing means is more freely llexible than the rest
oí the backing means in said plane substantially normal
to the windshield.
60
i3. A windshield wiper assembly comprising a pressure
transmitting member operatively connected with a wiper
blade, said wiper blade having a resilient elongate wiping
element with a wiping portion and a back portion, flexible
elongate backing means for said wiping element for co
action therewith, said backing means being relatively ilexi
ble in a plane substantially normal to a windshield to be
wiped. and being elatively inflexible in a plane transverse
thereto, transverse corrugations formed in at least one end
portieri of said backing means, said corrugations com
prising a plurality of undulations extending above and
below the plane ot said backing me. .ber, said corruga
tions each having an axis lying substantially perpendicular
to the longitudinal axis of said backing means whereby
said one end portion of the backing means is more freely
3,076,993
ñexîbîe than the rast of the backing means in said plane
Su‘osîanîîaìly normal is the Windshield.
2,782,445y
2,314,521
2,871,495
FOREEGN PATENTS
UNlTED STATES 1% TENTS
,589,3
2,6GS,2 5
2,664,535
2,772,436
Caïson ______________ __ Mar. 18,
Ecl-¿m51 ______________ __ Aug. 26,
Qísïîei ________________ __
5,
Deíbel __'______________ __ Dec. 4,
Krohm ______________ __ Feb. 26, 1957
‘Wallis ________________ __ Dec. 3, 1957
Oishei et a1. ___________ __ Feb. 3, 1959
1952
1952
1954
1956 10
744,398
'785,865
Great Britain __________ __ Feb. 8, 1956
Great Briîain __________ __ Nov. 6, 1957
OTHER REFERENCES
Germany, 517,814 11/63C, Dec. 2Q“, 1956.
Документ
Категория
Без категории
Просмотров
0
Размер файла
972 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа