U.S. patent number 3,913,896 [Application Number 05/372,759] was granted by the patent office on 1975-10-21 for splatter shield for mixing bowls and the like.
Invention is credited to Ethel M. Hawke.
United States Patent |
3,913,896 |
Hawke |
October 21, 1975 |
Splatter shield for mixing bowls and the like
Abstract
A shield, of flat, plate-like form, has a slot extending
inwardly from its periphery to receive the conventional, spaced
beater shafts of an electric mixer of the type used in the home.
Means is provided, presenting an abutment intermediate opposite
ends of the entrance slot, to cooperate with the inner end of the
shaft in defining spaced stops, limiting the shield against
movement, when in use, to an extent such as would wholly or
partially uncover the mixing bowl into which the beater shafts
extend. The device is specially adapted to facilitate maintenance
in a completely sanitary condition, and is so formed as to be
usable either with small or large mixing bowls.
Inventors: |
Hawke; Ethel M. (Milford,
NJ) |
Family
ID: |
23469527 |
Appl.
No.: |
05/372,759 |
Filed: |
June 22, 1973 |
Current U.S.
Class: |
366/347;
D7/412 |
Current CPC
Class: |
B01F
13/04 (20130101); B01F 15/00779 (20130101); A47J
43/044 (20130101); A47J 2043/04481 (20130101) |
Current International
Class: |
A47J
43/044 (20060101); A47J 43/04 (20060101); B01F
13/04 (20060101); B01F 15/00 (20060101); B01F
13/00 (20060101); B01f 015/00 () |
Field of
Search: |
;259/116,117,118,119,121,122,125,DIG.35,115,123,124 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Jenkins; Robert W.
Attorney, Agent or Firm: Sperry and Zoda
Claims
I claim:
1. A splatter shield for electric mixers of the type including
spaced, parallel beater shafts, comprising a one-piece, flat,
generally circular, sheet-like body having an elongated, narrow
slot extending inwardly from its periphery toward its center point,
said slot having a closed inner end, said slot being adapted to
loosely receive the beater shafts and said body being proportioned
to cover a mixing bowl to prevent splattering of the bowl contents
during agitation thereof by the beater shafts; rigid first abutment
means on said body disposed transversely of the general length of
the slot in spaced relation to said closed inner end thereof in
position to normally engage one of the beater shafts at a location
upon the body effective to prevent movement of the body in one
direction from a bowl-covering position during said agitation of
the bowl contents, said inner end of the slot presenting a second
rigid abutment means engaging the other beater shaft to prevent
movement of the body in the other direction, said first-named
abutment means adapted for passage of the beater shafts thereby
under the control of a user to disengage the beater shafts from the
slot and thereby free the cover, the slot having an elongated,
narrow part defined between the first and second abutment means
within which the shafts are confined during use to hold the body
against rotation, strip the bowl contents from the shafts, and
minimize splattering of said bowl contents, said first abutment
means comprising a pivoted arm movable between opposite extreme
positions in one of which it extends across the slot; a pivot
element mounting the arm upon the body for pivotal movement between
said opposite extreme positions thereof; and means to lock the arm
in said one position, comprising a threaded connection between the
pivot element and the body, and shoulder means on the pivot element
cooperating with the body in clamping the arm against the body upon
tightening of the threaded connection between the pivot element and
the body.
2. A splatter shield for electric mixers of the type including
spaced, parallel beater shafts, comprising a one-piece, flat,
generally circular, sheet-like body having an elongated, narrow
slot extending inwardly from its periphery toward its center point,
said slot having a closed inner end, said slot being adapted to
loosely receive the beater shafts and said body being proportioned
to cover a mixing bowl to prevent splattering of the bowl contents
during agitation thereof by the beater shafts; rigid first abutment
means on said body disposed transversely of the general length of
the slot in spaced relation to said closed inner end thereof in
position to normally engage one of the beater shafts at a location
upon the body effective to prevent movement of the body in one
direction from a bowl-covering position during said agitation of
the bowl contents, said inner end of the slot presenting a second
rigid abutment means engaging the other beater shaft to prevent
movement of the body in the other direction, said first-named
abutment means adapted for passage of the beater shafts thereby
under the control of a user to disengage the beater shafts from the
slot and thereby free the cover, the slot having an elongated,
narrow part defined between the first and second abutment means
within which the shafts are confined during use to hold the body
against rotation, strip the bowl contents from the shafts, and
minimize splattering of said bowl contents, said first abutment
means comprising a pivoted arm movable between opposite extreme
positions in one of which it extends across the slot, said arm
being generally L-shaped, having an elongated body portion
pivotally joined to the body and having a free end terminating in a
laterally extended head providing an abutment surface defining said
first abutment means and disposed transversely across the slot in
the use position of the first named abutment means.
3. A splatter shield as in claim 2, wherein said arm is pivotally
joined to the body of the splatter shield at a location laterally
spaced from the slot, whereby the arm, in the use position thereof,
is disposed with the body portion and head thereof located
obliquely to the length of the slot to define a generally V-shaped
recess extending across the slot to receive said one beater
shaft.
4. A splatter shield as in claim 3 wherein said body portion of the
arm is formed with longitudinally spaced openings, the body of the
splatter shield having a single opening registrable with either of
the openings of said arm, and a pivot element extendable through
the registered openings of the arm and body for effecting the
pivotal mounting of the arm upon the body, the openings of the body
portion of the arm being spaced apart a distance such that the head
of the arm will be at different distances from the closed end of
the slot, according to which of the openings of the body portion of
the arm is selected for registration with the opening of the
splatter shield body and for receiving the pivot element.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates, generally, to the art bearing upon
agitating, stirring, or mixing devices, and in particular to covers
therefor. In a more particular sense, the invention has reference
to the provision of a removable cover, designed specifically for
association with a conventional electric mixer of the kind normally
employing twin beater shafts, and in further association with a
mixer bowl, in such fashion as to substantially eliminate
splattering of the bowl contents.
2. Description of the Prior Art
It has heretofore been proposed to provide covers or splatter
shields for mixing devices, and among patents bearing upon this
particular concept will be found the following:
Patentee Patent No. ______________________________________ Olson
1,345,457 Green 2,193,356 Ost 2,486,320 Post 2,504,727 Perkins
2,858,118 Wright, et al 3,318,583
______________________________________
However, these have failed to incorporate certain highly desirable
characteristics, and as a result, all the problems encountered in
the prior art have not been completely solved thereby.
The housewife using an electric mixer finds certain inconveniences
in connection therewith, and in particular, when the mixer is
turned on, it is common for the contents of the mixing bowl to be
agitated in such fashion as to cause droplets or particles to be
driven therefrom, splattering the user, adjacent surfaces of the
kitchen counter, adjacent utensils, etc. Obviously, this is an
extremely undesirable characteristic of electric mixers as now made
and used, and requires that the housewife wash off the splattered
surfaces carefully, often over a substantial area thereof, so as to
eliminate not only the unsightly residue of the mixer bowl contents
splattered thereon, but even more importantly, assure against
unsanitary, dried food particles upon said surfaces which may
attract ants, may harbor disease-causing bacteria, etc.
In the prior art, attempts have been made to solve this problem, as
evidenced by the patents listed above. However, in some cases
additional problems have been created. For example, splatter
shields for splash covers as heretofore devised, have in some
instances been so complicated, as to be too expensive, and too
difficult to maintain in sanitary condition. In other instances,
the splatter shields heretofore conceived have not been adapted for
use with bowls of different sizes, and in still other instances,
the splatter shields have been of short-lived duration, have tended
to be easily broken or torn, and have been incapable of being
readily disassembled for cleaning, may additionally be incapable of
being washed in electric dishwashers, etc. All of these have been
undesirable attributes of splatter shields as heretofore devised,
and in addition, in many instances the splatter shields have been
usable only with bowls of particular size and shape, and have been
difficult to attach or detach, when use is to be made thereof.
A further problem, when no shield is used or when prior art
concepts are employed, is found in the annoying tendency of heavy
batter to creep or ride up the shafts to the motor, requiring
frequent stopping and cleaning during use.
The present invention, accordingly, has been intended to and is
believed to solve the problems involved in the prior art as noted
above.
SUMMARY
Summarized briefly, the invention comprises a flat, sheet-like
member of circular configuration in the illustrated embodiment,
which may be formed of a piece of plastic, preferably a type of
plastic which will not be subject to deformation or discoloration,
when subjected to repeated washings in conventional electric
dishwashers, in which high heat is often encountered. In accordance
with the invention, the flat, circular splash cover or splatter
shield is so designed as to be usable in overlying relation to
either small or large mixing bowls, and to this end, has a slot
extending substantially radially inwardly from the periphery
thereof, terminating well inwardly from said periphery, and so
proportioned as to receive the conventional twin beater shafts of
the ordinary electric mixer used by the housewife.
Associated with the flat plate member is means to prevent the cover
from moving off the mixing bowl when in use. The tendency of a
cover of this type to deviate from its proper use position occurs,
for example, due to vibrations encountered when the mixer is in
use. To this end, the invention incorporates abutment means adapted
to extend across the longitudinal center line of the slot, in such
fashion as to restrain the cover against movement off the mixing
bowl, regardless of the size of the bowl, to such an extent as
would uncover the bowl, even to a small degree.
In one form of the invention, the abutment means is in the form of
a pivoted member of hook-like shape, which can be swung between
opposite extreme positions in one of which it completely opens the
slot to facilitate positioning of the splatter shield for use, or
its ready removal after use. In another form of the invention, the
slot itself has a tortuous area intermediate its ends, again
presenting an abutment tending to engage one of the beater shafts
in the event the cover begins to move out of its proper use
position.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view, of a splatter shield or splash cover
according to the present invention, as it appears when in use;
FIG. 2 is an enlarged, fragmentary vertical sectional view taken
substantially on line 2--2 of FIG. 1;
FIG. 3 is a plan sectional view on the same scale as FIG. 2, taken
substantially on line 3--3 of FIG. 2;
FIG. 4 is a detailed sectional view, still further enlarged,
substantially on line 4--4 of FIG. 3;
FIG. 5 is a view similar to FIG. 3, showing a modified
construction; and
FIG. 6 is a fragmentary view similar to FIG. 5 showing another
modification.
BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1, the reference numeral 10 generally designates
a mixer of conventional design, such as is commonly used by the
housewife. Although these may differ from one another in respect to
various structural details, in most instances the mixer
incorporates a pair of parallel, twin beater shafts 12, 14, and a
stand 16 upon which is removably positioned a mixing bowl 18.
Housewives experience the difficulty or inconvenience of having the
bowl contents splatter during agitation thereof by the beaters, and
to obviate this difficulty, in accordance with the present
invention I provide a splatter shield or splash cover generally
designated 20.
In the preferred embodiment, the splatter shield 20 includes a
flat, circular, body portion 21, formed of a high-heat plastic
material in a preferred embodiment, and preferably characterized by
an absence of flanges, lips, projections or the like that would
tend to complicate the construction, limit the versatility thereof,
and that might possibly be of a nature such as to form food
crevices in a manner that would make it difficult to keep the cover
in a completely sanitary condition.
Further in accordance with the invention, the body 21 of the splash
cover or splatter shield is formed, in the embodiment illustrated
in FIGS. 1-4, with a straight, elongated slot 24 opening upon the
periphery of the body 21, and extending radially of the circular
body of the device. The slot does not extend inwardly from the
periphery fully to the center point of the body, but rather,
terminates at its inner end in closely spaced relation to said
center point, to particularly adapt the device for use both with
smaller bowls, such as shown in chain dotted lines at 22 in FIG. 3,
and with larger bowls 18.
In any event, slot 24 is of a width slightly greater than the
diameter of the beater shaft 12, 14, so as to permit the slot to
receive said beater shaft comparatively loosely, in such manner as
to assure against rubbing of the shafts against the walls of the
slot when the device is in use.
In the embodiment of the invention shown in FIGS. 1-4, abutment
means is provided, whereby to limit the device from movement out of
its proper position when in use. Such movement may normally occur
by reason of vibrations set up during the operation of the mixer,
but through the provision of abutment means incorporating a
swingable locking arm 26 having a head 28, the device will be kept
in its assigned position.
To this end, the arm 26 is generally L-shaped in the illustrated
embodiment, having an elongated body portion, terminating at its
free end in a laterally extended head 28, said head providing an
abutment surface 29 extending transversely across the slot 24 when
the arm 26 is in its use position shown in full lines in FIG. 3.
Arm 26, at its proximal end, has a smooth-walled opening 30,
receiving a correspondingly smooth-surfaced shoulder portion 32 of
a screw shank 34 of a combination locking and pivot element 36
formed with a large diameter head 37. Adjacent the opening 30 is a
second similar opening 31. This can be used instead of opening 30
to receive element 36, as an adjustment means whereby head 28 may
be brought closer to the pivot axis by arm 26. This permits
adjustments for use with different makes of beaters, for example,
one in which the beater shafts are closer together.
The arm 26, as well as the pivot element 36, may be formed of the
same high-heat plastic as the body 21, and as will be noted, the
pivot element can be swiftly removed from a threaded opening 38
formed in the body 21, so as to completely take apart the pivot
element, arm 26, and body 21 to facilitate washing of the device
after use.
When the device is to be used, however, the parts are connected as
shown in FIGS. 3 and 4, and in these circumstances, the arm 26 is
swung from a dotted line to a full line position as shown in FIG.
3, after the shafts 12, 14 have entered the slot 24. Abutment
surface 29 now extends across the slot, and by giving the pivot
element a quarter- or half-turn, a shoulder 39 defined at the
underside of the head 37 is caused to bear tightly against the top
surface of arm 26, forcing the arm downwardly into tight,
frictional engagement with the top surface of the body 21, thereby
locking the arm in its use position shown in full lines in FIG.
3.
After the device has been used, the threaded portion 34, which may
be formed with a quick-thread, is backed off just sufficiently to
free the arm 26 for pivotal movement back to its dotted line
position, thereby to permit the cover to be removed.
In the form of the invention shown in FIG. 5, the device is made in
a single piece, but in common with the first form of the invention
has an abutment surface extending across the adjacent beater shaft
14 in the use position of the device. In this form of the
invention, the device has been generally designated 120, and
includes a flat, circular, sheet-like plastic body 121, formed with
a radial slot 124, terminating short of the center point of the
body 121, while opening upon the periphery of the body, in the same
manner as the slot 24. In this form of the invention, the slot is
formed, intermediate its ends, with a tortuous portion extending
out of the radial line along which the general length of the slot
extends, whereby to define an abutment surface 129 disposed
transversely of the general radial extension of the slot, in the
same manner as the abutment surface 29 extends thereacross in the
use position of arm 26 in the first form of the invention.
In this form of the invention, the open end of the slot receives
the beater shafts 12, 14, and then by ready manipulation of the
cover, the beater shafts traverse the arcuate or tortuous portion
125 of the slot, until the beater shafts are disposed in the inner
end portion of the slot, between the closed end of the slot and the
abutment surface 129.
In both forms of the invention, the arrangement causes the body 121
or 21 as the case may be, to cooperate with the beater shafts in
holding the cover in its use position in respect to the mixer and
the bowl 18 or 22.
The operation of the device is believed obvious, but it may be
noted that when using a small bowl, the beater shafts would be
disposed substantially centrally thereof in the illustrated
arrangement, whereas said shafts are off-set slightly from the
center of a larger bowl 18. This does not detract from the
efficiency of the mixer, since in either event, the bowl contents
are effectively agitated. If necessary, one can rotate the larger
bowl 18 should this be found desirable to assure uniform mixing of
the bowl contents. In these circumstances, of course, the cover
does not interfere with such rotatable movement, since the cover is
held in its proper, use position, in which position it covers the
bowl effectively except for the small, inconsequential area defined
by the open portions of the slot. Of particular importance is the
fact that the construction prevents heavy batter from riding up the
beater shafts. The width of the slots, and the particular structure
whereby the cover is held in place in respect to the shafts,
produces the desirable result of continuously stripping the batter
from the shafts, when it tends to creep upwardly thereon, without
attention on the part of the user.
It is believed that the slot shown in FIG. 5 could take various
other forms, without departure from the spirit of the invention, as
for example, the arrangement shown in FIG. 6, in which the device
has been generally designated 220, includes a plastic body 221
similar to those previously described, and has a slot 224 extending
generally radially of the body, but formed intermediate its ends
with an off-set defining an abutment 229. In this form of the
invention, thus, the slot has an outer end portion opening upon the
periphery of the cover, and designated by the reference numeral
240, and an inner end portion designated by the reference numeral
242, the inner end portion being of a length slightly greater than
the spacing of the beater shafts, so that beater shaft 12 is in
close proximity to the inner end beater shaft the slot, while
beater 14 is disposed, correspondingly, in close proximity to
abutment 229, the inner and outer end portions of the slot being
connected by the offset or connecting slot portion 242, that
extends normally to the lengths of the slot portions 240, 242,
whereby to define the previously mentioned abutment 229.
* * * * *