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Патент USA US2405056

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Jui? 30, 1945-
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SAFETY GRATER
Filed Dec. 3l, 1941
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229405,65@
Patented July 30, 1946
2,405,056
UNITED STATES PATENT OFFICE
_
2,405,056
n
SAFETY GRATER
Irving Rosenbloom, New York, N. Y., assignor to
Renwal Manufacturing Co., Inc., New York,
N. Y., a corporation of New York
Application December 31, 1941, Serial No. 425,073
10 Claims.
(C1. 14s-_177)
1
2
This invention relates to improvements in
graters, and more particularly to a novel, prac»
result is a unitary grater of pleasant appearance,
durable, sturdy, efñcient, stainless, sanitary and
tical, plastic grater.
relatively inexpensive.
It is among the objects of the present invention
to provide a grater suitable for all grating pur
poses, and which is always safe to use. In accord
ance with my invention I provide a unitary grater
construction of composition or plastic material.
The unitary grater avoids the use of metal or of
sharp metallic edges that have characterized 10
Figs. l, 2 and 3 illustrate one exempliñcation
which the unitary plastic grater may assume in
practice. The grater comprises a rectangular
frame I0 having an extended looped handle Il.
A lattice network I2 is integrally formed with
framework I0. The lattice network I2 contains
a plurality of symmetrically arranged square, or
rectangular, openings I3 formed by a series oi‘
regularly spaced horizontal bars I4 and vertical
prior graters, The resultant grater is rust-proof,
effective, and cannot cause injury to the user.
The plastic grater of my present invention is a
sturdy, durable utensil, useful for grating foods,
vegetables, soaps, breads, and the like. It is also
bars I5. Bars I4 and I5 are in the same plane,
and are molded to constitute a unitary lattice
network construction incorporating the openings
I3. The frame I0 and lattice network I2 are
useful for dicing cooked Vegetables and other
molded as a single unitary structure, with the
foodstuffs. My preferred unitary grater construc
ends of bars I4 and I5 integrally terminating in
tion permits ready cleansing, insuring a sanitary
frame IU.
utensil, so essential when used with food. Also,
the plastic grater is practical, and relatively in 20 The grating surface of lattice network l2 is
formed by shaping bars I4 and I5 thereof so as
expensive to fabricate.
t0 taper into cutting edges IB and I'I. The cross
These and further objects, advantages and
capabilities of my invention will become more
sectional appearance of bars I4 and I5 are ac
cordingly triangular as Seen in Figs. 2 and 3. in
apparent in the following description of pre
ferred embodiments thereof, illustrated in the 25 this manner sufficient mechanical strength is irn
parted to bars I4 and i5 comprising the lattice
drawing, in which:
network I2, and also insures suitable cutting
Fig. l is a plan View ofr one construction of the
edges for the grating surface thereof. Additional
unitary grater,
mechanical strength may be imparted to the
Fig. 2 is a cross-sectional view through the
graterof Fig. 1, taken along the line 2-2 thereof. 30 lattice network I2 without interfering with the
grating or dicing operations of the grater. To
Fig. k3 is an enlarged perspective view of a
wards this end I provide ribs or bulges I8 and
detail of the grater of Fig. l.
I9 on the non-cutting sides of bars I4 and I5 re
Fig. 4 is a cross-sectional View, corresponding
spectively, Strengthening ribs I8 and I8 have a
to Fig. 2, of a modified form for the grater.
cross-sectional width slightly larger than that of
Fig. 5 is a plan view of another form of the
the non-ribbed bars. Such ribs may be provided
grater,
Fig. 6 is an enlarged cross-sectional view of the
for selected bars so as not to interfere with the
size of diced elements. In the grater embodiment
of Fig. 1, ribs I8 and I9 are provided respectively
invention is preferably such as to permit its com ,40 for three symmetrically spaced horizontal bars
I4, and two vertical bars I5. It is to be under
plete fabrication by a single mechanical molding
stood that more or less of the bars may be so
operation. The plastic material may be of any
reinforced within the scope of the invention.
suitable type, including phenolic resins, _such as
The thickness of the bars containing the
Bakelite and Catalin; cellulose acetate; acrylic
strengthening ribs preferably does not exceed the
resins, such as Lucite; styrene resins; or other
plastic molding composition. The grater may be
thickness of the frame I0, as shown in Fig. 2.
The grating surface is preferably arranged in a
formed by injection molding, compression mold
plane corresponding with a surface of frame II),
ing, or by casting. The preferred plastic grater
so that the frame Will not interfere with the grat«
is a unitary device, Towards this end the in
ing action. In this manner, for a given thickness
vention provides a unitary plastic grater of ample
of frame I Il, for example fle", a plastic lattice
strength and durability, incorporating suitable
network I2 of ample mechanical strength may
molded grating surfaces. I have constructed
be provided for the grater. The tapered nature
complete practical commercial graters, in accord
of the lattice bars I4 and I5 insures durable
ance with the present invention, by a single in
jection or compression molding operation. The 55 grating edges that will stand up under all con--
grater of Fig. 5, taken along the line 6_6 thereof.
The construction of the plastic grater of the
2,405,056
if
ditions of use. The strengthening ribs do not
aifect the dicing operation of the grater, since
the resulting openings I3 in the grater are not
unduly interfered with. In one form, the
strengthening ribs corresponding to I8 and Isl CII
may be provided for all the horizontal and ver
tical lattice bars, as will be shown in connection
4
Fig. 1. This merely reduces the cross-sectional
area of the elements diced by the grater.
While I have disclosed preferred embodiments
which my invention may assume in practice, it
is to be understood that modifications and Vari
ations thereof may be made Without departing
from the broader spirit and scope of the inven
tion as expressed in the appended claims.
with the form of the invention illustrated in
Figs. 5 and 6.
What I claim, and desire to secure by United
An important feature of the present invention 10 States Letters Patents, is:
l. A grater of plastic composition comprising
is the novel grating surface arrangement pro
a frame supporting a lattice network composed
vided for the plastic lattice network. The grat
of intersecting series of parallel bars integrally
ing or cutting surface is arranged substantially
in a single plane, preferably co-extensive with
molded with said frame, said bars being substan
the corresponding edge of the supporting frame 15 tially triangular in section and terminating in
grating edges lying in a common surface substan
lil. Also, the design of the grating surface is
tially including one face of said frame.
such as to permit its direct molding with the
remainder of the grater as a unitary body. Fig. 3
2. A grater of plastic composition comprising
clearly illustrates the preferred nature of the
a frame supporting a lattice network composed
grating edges. rIne lattice bars Ill and I5 taper 20 of transverse series of parallel bars in substan~
tially the same plane integrally7 molded with said
to narrow or pointed edges IIS and I`I respectively.
By providing regular constrictions or spaced nar
frame, said bars being triangular in section and
terminating in grating edges lying in a plane
rowed widths 20, 2i along lattice bars I4 and
substantially including one face oi~ said frame,
I5, the resultant formations terminate as grat
ing edges Z2, 23, alternated with grating edges 25 said triangular bars extending in height to sub
I6 and I`I respectively. In this manner two sets
stantially the other face of said frame.
of interlaced cutting edges I5, I'I and 22, 23 are
3. A grater comprising a frame, a lattice network
formed on the grating surface of the lattice net
composed of transverse series of bars of plastic
work I2, which sets are in planes substantially
material integrally molded with said frame, said
close together. The displaced cutting edges con 30 bars terminating in grating edges lying in a sur
stitute sharp saw-tooth cutting surfaces along
face substantially including one face oi' said
lattice bars i4, I5. Such arrangement permits
Iranie, a plurality oi` said bars having reinforc
the direct molding of practical grating teeth for
ing ridges extending opposltely of said grating
the plastic grater, which arrangement has been
edges and merging with said frame.
4. A grater of plastic composition comprising a
found very satisfactory in practice both from the 35
molding and use standpoints. It is to be under
frame supporting a lattice network composed of
transverse series of parallel bars in substantially
stood however, that other serrated or cutting
edge constructions for the plastic grating sur
the same plane integrally molded with said frame,
face may also be utilized.
Said bars being triangular in section and termi
Fig. 4 illustrates a modified form of the grater, 40 nating in grating edges, said bars having reinforc
wherein both sides thereof constitute grating sur
ing ridges extending from the bases thereof and
faces. A transverse series of bars I4’ and I5'
merging with said frame.
are arranged similarly to bars Ill and I5 of Fig. 1.
5. A grater comprising a frame supporting a
'I‘he bars Iii’ and i5’ taper toward both outer
lattice network composed of transverse series or'
surfaces of the grater. The cross-sectional ap 45." bars, said bars being substantially triangular in
pearance of the bars is diamond shaped, as shown
section and terminating in sharp grating edges,
at I5’ in Fig. ll. Serrated grating edges I6’ and
said bars having regularly spaced constrictions
22' extend on both sides of bars lll’; the grating
extending to said edges to constitute a serrated
edges il’ (and 23', not shown), on both sides
grating surface.
of bars l5’. The grating edges on each side of 50
6. A grater of plastic composition comprising
the grater correspond to those in the form of
a frame supporting a lattice network composed or'
the invention in Fig. l, and are integrally formed
transverse series of parallel bars integrally molded
during the molding operation. The cross-sec
with said frame, said bars being triangular in
tional area of the bars I4’ and I5’ are made
section and terminating in grating edges, said
sufficient to impart suitable mechanical strength 55 bars having regularly spaced constrictions ex
to the grater. The upper and lower grating sur
tending to said edges to constitute a serrated grat
face planes are preferably substantially co-exten
ing surface.
sive with the corresponding surfaces of the frame
rI. A grater comprising a frame, a lattice net
I0, as shown in Fig. 4.
work composed oi' transverse series 0i' bars in sub
Fig. 5 is a plan view of a further form which 60 stantially the same plane and made of plastic
my invention may assume in practice. A rec
material integrally molded with said frame, said
tangular frame 25 encloses a lattice network 26.
bars terminating in grating edges lying in a plane
A handle 2l extends from frame 25, and is in~
substantially including one side of said frame, said
tegrally molded therewith. The lattice network
triangular bars extending in height to substan
26 comprises horizontal bars 28 and vertical bars 65 tially the other side oi' said frame, and said bars
29 containing corresponding serrated grating
having regularly spaced constrictions extending to
edges 30 and 3| respectively, similar to the previ
said edges to constitute a serrated grating sur
ous forms of the invention. As shown in Fig. 6,
face.
all the bars 28 and 29 contain ribbed reinforce
8. A grater of plastic composition comprising a
ments S2 and 33 respectively, on the back sides 70
frame, a lattice network composed of transverse
thereof. This arrangement imparts superior
series of parallel bars in substantially the same
mechanical strength to the lattice structure of
plane integrally molded with said frame, said
the grater. The openings 34 in the lattice net
work 26 are accordingly somewhat smaller than
bars being diamond in section and terminating in
the corresponding openings I3 of the form in 75 sharp grating edges on both sides of the network,
S
2,405,056
said grating edges lying in planes substantially
a frame, a lattice network composed of trans
including the opposite faces of said frame.
verse series of parallel bars in substantially the
9. A grater comprising a frame supporting a
same plane integrally molded with said frame,
lattice network composed of transverse series of
said bars being diamond in section and terminat
parallel bars in substantially the same plane,
ing in sharp grating edges on both sides of the
6
said bars being diamond in section terminating in
network, said grating edges lying in planes sub
sharp grating edges on both sides of the network,
stantially including the opposite sides of said
and said bars having regularly spaced constric
frame, and said bars having regularly spaced
tions extending to said edges to constitute ser
constrictions extending to said edges to con
rated grating surfaces.
w stîtute serrated grating surfaces.
10. A grater of plastic composition comprising
IBVING ROSENBLOOM.
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