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Патент USA US2122926

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July 5, 1938,‘
J. BLACHER
-
FLASHING
Filed Jan. so, 1957
v2,122,926
Patented July 5, 1938
2,122,926
@UNITED STATES PATENT OFFICE
2,122,926
FLASHING
Application
‘Josephs
January
Blacher,
so, 1937,
Boston,
Serial
123,174
3 Claims. ‘ (01. 72-127)
. {The present invention relates generally tosheet
metal ,?ashings, and, more speci?cally, to that
elassgof- ?ashingsknown, as through ?ashings, and
it pcomprehends a construction designed to be
,5 etfestirely maintained inengagement with the
material supporting it and with the material sup
poitedbyit .More particularly, the presentin
ventionrelatests sheet metsls?ashings Composed
disate like parts in theseveral views, and where
in
Fig. 1 is a fragmentary View, in perspective, of‘
a wall of a building, showing the flashing in situ
between seursessf masonry:
.
s Fig. 2 is _,a transverse section of ‘the ?ashing.
Figs is a lonsitudinslslsvation of the ?ashing
In the drawing, 1 designates the ?ashing'hav
of coppsrcr galvanized irennr other rust re
ing substantially parallel continuous drainage
19 sistine material, which are interposed horizon- ~ Channels ,2 and discontinuous inverted channels it
tally between courses of masonry in building 3 in series, both types of channels being prefer
WaIIsbemgembedded inthe Acementor mortar
ioints<between the saidcourses of masonry, such
flashings being in lengths and in widths equal to,
U5 orin slight, excess of, the lengths and the widths
ofthe walls and being adapted to prevent down
ward seepage .of water through ‘the cement or
mortarjoints. ‘
Oa
i
ably trapezoidal in crosssection and being sepa
rated by the flat portions 4 of the ?ashing. Be
tween the discontinuous inverted channels 3 lie
the ?at portions 5 of the ?ashing: the flat por
tions3 and the flat portions 5 of the ?ashing lie in
a common plane surface. The ?ashing may be
provided with edge portions ‘which may be bent
p ,- ThEzDI'GSQIItiHVGHtiOIl is embodied ina ?ashing
downwardly, as at 1, or upwardly, as at 8, the said
havingsubstantially parallel continuous drain
agelchannelsspaced apart at sensible distances,
edge ‘portions being designed torcontrol and di- 1
between eachadiacent pair of which is disposed,
substantially parallel to the continuous drainage
rect the discharge of water accumulating upon ‘
the‘upper surface of the ?ashing.
" The insertion of ‘the ?ashing in a building wall
channelsdiscontinuous inverted channels in se
25 ries, the continuous drainage channels and the
is ,eifec'te‘d ‘in the following manner: a layer of
discontinuous inverted channels being preferably
sonry, the ?ashing is laid thereon with the con
tinuous drainage channels concave upward and
oriented in the direction of intended drainage,
the ?ashing is then pressed into the cement or
less wide at bottom than at mouth. Since the
cross sections of such channels resemble trape
zoids minus the longer parallel sides, such chan
30 nels will hereinafter be termed channels trape~
zoidal in cross section.
35
a
a
therein, to cause an appreciable ?ow of the ce
ment or mortar up into the discontinuous in
to effect drainage in a preferential manner.
Another object of the present invention is to
provide a ?ashing whose construction insures the
maintenance of a drainage surface substantially
verted channels, and to impart to the ?ashing any
desired inclination to promote drainage, a layer
ous drainage channels.
Another object of the present invention is to
provide a ?ashing having channels trapezoidal
in cross section, since channels of such confor
mation in a ?ashing of the present character
possess special merit.
45
Another object of the present invention is to
provide a ?ashing of the character described ,
' which can be formed from sheet metal in an ex~
peditious and economical manner.
50
mortar to an extent su?icient to cause the con
tinuous drainage channels to become embedded
The principal object of the present invention is
to provide a ?ashing possessing regions designed
plane along the direction transverse the continu
40
cé‘rnent'or mortar is ‘spread upon a course of ma- ‘
The attainment of these and other objects by
the present invention will become, apparent when
the following detailed description of the pre
ferred form of the invention is read in conjunc
tion with an examination of the accompanying
55 drawing wherein like numerals of reference in
of cement or mortar is then spread upon the up
per surface of the ?ashing, ?lling the continuous
drainage channels, and ?nally, courses of mas
onry are built up on the ?ashing, the Weight of
the courses of masonry serving to establish more
intimate contact of the surfaces of the ?ashing
with the cement or mortar.
When properly inserted in a building wall, the
?ashing exhibits the following characteristics:
warping of the drainage surface of the ?ashing
along the direction of drainage is impossible, due
45
to the stiffening effect imparted to the flashing
by the continuous drainage channels and, to a
lesser extent, by the discontinuous inverted chan
nels; movement of the ?ashing in a direction 00
transverse to the direction of drainage is impossi
ble due to the restraint of movement imposed up
on the ?ashing by the coaction of the ridges of
cement or mortar ?lling the continuous drain
age channels and partially or completely ?lling
amt-2a
2
the discontinuous inverted channels, and move
ment of the ?ashing in a direction parallel to the
direction of drainage is impossible due to the re
straint of movement imposed upon the ?ashing
by the coaction of the convex surfaces of the
discontinuous inverted channels and the superim
posed layer of cement or mortar.
,7 Since the cement or mortar is forced up into
10
the discontinuous inverted channels by pressure
exerted upon the ?ashing, the discontinuous in
verted channels are not infrequently but im
perfectly ?lled, due to the entrapment of air in
the positioning of the flashing upon and in the
layer of cement or mortar. Moreover, in the set
ting of the cement or mortar, there may occur a
slight shrinkage thereof, so that the discontinu
ous inverted channels are then ?lled to a degree
slightly less than are the continuous drainage
channels. It has been found that channels trap
20 ezoidal in cross section, and. in a less satisfac
tory manner and to a lesser degree, channels
semicircular in cross section, will accommodate
the slight changes’ in the areas of ?ashings,
caused by the thermal expansion and contrac
tion thereof, and the strains developed between
the ?ashings and the cement or mortar, by
changes in temperature, due to differences in
the coefficients of expansion of the ?ashings and
the cement or mortar, especially if the discon
30 tinuous inverted channels are not wholly ?lled
with cement or mortar.
The ?ashing herein described may be readily
formed out of metal sheets by the use of suit
ably fashioned rolls, and thus, such ?ashing may
35 be produced expeditiously and in an economical
manner, Without the use of expensive equip
ment, in the average metal working shop.
What is claimed is:
1. A ?ashing comprising a ?at continuous strip
40 of sheet metal embodying therein a plurality of
parallel continuous ?at-bottomed drainage chan
nels, uniform in cross section throughout their
lengths and spaced apart at sensible distances,
~ and a plurality of discontinuous inverted flat
bottomed channels, uniform in cross section
throughout substantially their lengths, arranged
in series interposed between and parallel to ad
jacent pairs of the parallel continuous drainage
channels, the ?at bottoms of the continuous
drainage channels and of the discontinuous in
verted channels being disposed, respectively, be
low and above the flat continuous strip of sheet
metal in planes parallel thereto.
2. A ?ashing comprising a ?at continuous strip
of sheet metal embodying therein a plurality of
parallel continuous ?at-bottomed drainage chan
nels, uniform in cross section throughout their
lengths and spaced apart at sensible distances,
and a plurality of discontinuous inverted flat
bottomed channels, uniform in cross section
throughout substantially their lengths, arranged
in series interposed between and parallel to ad
jacent pairs of the parallel continuous drainage
channels, the ?at bottoms of the continuous 20
drainage channels and of the discontinuous in
verted channels being of lesser widths than the
mouths of their respective channels and being
disposed, respectively, below and above the ?at
continuous strip of sheet metal in planes par 25
allel thereto.
3. A ?ashing comprising a ?at continuous strip
of sheet metal embodying therein a plurality of
parallel continuous flat-bottomed drainage chan
nels, uniform in cross section throughout their 30
lengths and spaced apart at sensible distances,
and a plurality of discontinuous inverted ?at—
bottomed channels, uniform in cross section
throughout substantially their lengths, arranged
in series interposed between and parallel to ad- ‘
jacent pairs of the parallel continuous drainage
channels, at distances markedly greater than the
widths of the parallel continuous drainage chan
nels, the flat bottoms of the continuous drainage
channels and of the discontinuous inverted chan
nels being disposed, respectively, below and above
the ?at continuous strip of sheet metal in planes
parallel thereto.
JOSEPH BLACHER.
40
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