вход по аккаунту


Патент USA US2063081

код для вставки
Dec. 8, 1936.,
‘ 2,063,081
Filed April 25, 1936
?fF?/V/n’L/A/ O CHu/Pcw
Patented Dec. 8, 1936
j 2,063,081 1.
Franklin 0. Church, Buffalo, N. Y., assignor to
Dunlop Tire & Rubber Corporation, Buffalo,
N. Y., a corporation of New York
Application April 25, 1936‘, Serial No. 76,310
5 Claims.
(01. 155-119) '
a bottom view, and Fig. 3 a bottom-view of a moth
My present invention relates to ‘cushions of
molded cellular resilient material,_such as sponge
?ed arrangement of the recesses.
The cushion shown in the, accompanying dra .
rubber or foamed latex rubber.
Heretofore cushions of resilient cellular struc
ing isrmade of a single mass of foamed latex rub-\
ture have been formed of a mass of the cellular
material with a number of spaced recesses pro
her which is poured into a mold having cores ‘
mass so as to form partition walls between the re
cesses and a continuous cover slab above the
10 recesses and joining the intersecting walls. In
these molded cushions as heretofore constructed,
‘top slab III which is extended downwardly at the '
edges to form encircling walls ii. Recesses i!
' 5
projecting‘ upwardly therefrom to form the :re-_
jecting from they underside upwardly into the. cesses. The resulting structure has a continuous
are formed at spaced intervals and project upé. 10
wardly from the bottom of the cushion through
which they open to a height
g su?lcient to form a
stantiallyuniform from one intersection to the ' top slab Ill and to form intersecting partitions l3,‘ "
next, if a square or polygonal recess was employed that‘extend in one direction, for'example length
or they decreased in thickness if cylindrical re > wise, and N that extend at a right angle or cross ll
the thickness of the intersecting walls was sub-’ ‘
cesses were employed. Consequently the cushion
was stiil'er or harder at the points of intersection
inasmuch as the partitions were braced in two
directions at these points and were yet relatively
.20 more yielding at the lnterven'ingportions; The
tendency of this was to decrease the uniformity
of the cushion or to render it lessyielding in cer
tain parts than in others;
At the intersection of the walls I! and i4 small
?llets it are formed to avoid sharp fcorners that
might weaken the structure. From these points
of intersection the surfacesof the intersecting 20'
walls I! and it are bowed'inwardly toward the
centers of the recesses I! as at It. ‘As a result,
the thickness of the intersecting walls increases
In my present invention this variation/gin the toward the point midway of the intersection.
25 resiliency of the cushion due to stiffening at the Consequently the strength and resistance of the 25
intersections of the wall is'counteracted by thick -partition walls increases at increased distances
ening the walls between the intersections.‘ '3 Small from the intersection where the strengthening
due to cross bracing of the walls, decreases. Thus
?llets are“ provided between the intersecting sur
faces of the partitions, but otherwise the walls are the thickening of thepwalls 'counterbalances or ‘
30 thinnest near the points of intersection and then compensates for the cross bracing at the inter
how inwardly toward the recesses to progressively sections.
increase the thickness of the walls towards their’
The recesses I! are domed at their upper ends"
midpoint.- This thickening is so proportioned so as to give‘an shape and thus dis
' for any given requirement or condition as to com
35 pensate for the greater rigidity or. stiffness at the
tribute downward stresses acting on the cover
slab ill at the midpoint of the recess outwardly 35
points of intersection due to the cross bracing of
the intersecting walls. The recesses are prefer
and downwardly to the partition walls‘.
ably dom'ed so as to spread pressure stresses to
to have less sti?ness or to make them more yield
ing at certain areas than at others. For example,
ward the partition walls.
, In certain cushion constructions it is desirable
The invention enables the softness of the-cush- \ ' a more comfortable seat cushion is provided if the
ion to he graduated or varied from one area to an;
part near thefront edge is somewhat softer than
other by increasing the cross-sectional dimen ' the areas back of this front edge. For this pur
sions of the recesses in those areas where a softer
or more yielding cushion is desired. This en
45 largement of the cross-sectional area ,may be .ac-v
companied either by a wider spacing of the parti
pose tne front recesses as at I‘! in Fig. 2 are made
wider in one or more dimensions so that there
tions or by decreasing the wall thickness while
The softness or- yielding effect of the cushion
still maintaining the relative increase in wall
thickness between the intersections.
The various features'of the invention are illus
as at i Bin Fig. 3 as well as increasing the spacings
tratedlby way of example in the accompanying
suitably increasing ‘the cross-sectional dimensions I
drawing‘as ‘applied to a cushion having recesses
of the recess.
of vrectangular or square cross-section and in
Fig. 1 is a vertical section of the cushion; Fig. 2
will be less supporting wall area at these sections 46
of decreased stiffness.
may be increased by decreasing the wall thickness ' ' -
of the walls, both of these being accomplished by
The change in wall thickness and spacing, of
the walls may be varied progressively as, ‘for ex
ample, by making the'walls 'at i! in P18. 3 some
what thicker and the recesses at this point some- ‘ thickness from said '?llets to a midpoint between
what smaller than at the point at l8.
What I claim is-:—
said walls.
4. A cushion of cellular resilient material com
1. A cushion oi.’ cellular resilient material com
prising a top slab of said material and intersect
prising a topslab of said material and intersecting ing vertical walls beneath said slab, said walls
vertical walls beneath said slab. said walls being forming successive spaced recesses, said recesses
thicker at the midpoint between successive wall - being polygonal and having their walls bowed in
wardly toward the interior Y 01' said recesses to
2. A cushion of cellular resilient material com
prising a top slab of said material and intersect
thicken‘ them progressively toward their midpoint.
ing vertical walls beneath said slab, said walls
being thickened progressively toward a point mid
' way between said wall intersections.
3. A cushion of cellular resilient material com
15' prising a top slab of said material, and intersect
ing vertical walls oi said material beneath said
slab‘, said wail surfaces having ?llets at their point
of intersection and increasing progressively in
5. A cushion of cellular resilient material com 10
prising a top slab of said material; and intersect
ing vertical partition walls or said material joined
to said slab and extending‘therebeneath to form
successive spaced recesses,‘ said recesses being
domed at their tops and said partition walls being 15
thicker at an ‘intermediate point than at {said
Без категории
Размер файла
287 Кб
Пожаловаться на содержимое документа