Abstrict A portable pill crusher for crushing tablets of compressed powder
has upper and lower plates, The plates attached to one another at
one end, and forced apart at the opposite end so that the crusher
is normally in a pill-loading position. The crusher has a handle
attached to a post which extends upwardly from the lower plate through
the upper plate, and the handle has a downwardly extending lobe
which acts as a cam on the top surface of the upper plate, pushing
it downwardly when a user applies a force to the handle. The upper
plate has a crush member on its under-side which is sized and configured
to fit within a pill receptacle formed on the end of the lower plate.
The device can be operated by one hand, and requires little force
to use.
Claims What is claimed is:
1. A pill crushing device comprising: (a) a lower plate having
a first end and a second end; (b) an upper plate having an upper
surface, a first end and a second end, said second end of said upper
plate attached to said second end of said lower plate; (c) means
for urging said first ends of said upper and lower plates apart
from one another; (d) a receptacle for accepting crushable pills,
said receptacle projecting upwardly from said first end of said
lower plate; (e) a crushing member projecting downwardly from said
first end of said upper plate, said crushing member sized to fit
within said receptacle; (f) a post extending upwardly from said
lower plate through said upper plate, said post positioned between
said second end of said lower plate and said receptacle; and (g)
a handle pivotally attached to said post above said upper plate,
said handle having a lobe extending downwardly therefrom to abut
and apply a camming force to said upper surface of said upper plate;
wherein said device is operable by said handle between a pill-loading
position wherein said first ends are urged apart by said urging
means and a pill-crushing position wherein said first ends are nearer
one another.
2. The pill crushing device of claim 1 wherein said post is positioned
nearer to said receptacle than to said second end of said lower
plate.
3. The pill crushing device of claim 2 wherein said means for urging
said first ends away from one another comprises a spring coiled
around said post between said lower and upper plates.
4. The pill crushing device of claim 2 wherein said means for urging
said first ends away from one another comprises a leaf spring attached
between said lower plate and said upper plate.
5. The pill crushing device of claim 2 wherein said upper and lower
plates are formed of one sheet of material bent over on itself,
and wherein the said means for urging said first end of said upper
plate away from said first end of said lower plate comprises the
natural elasticity of said material.
6. The pill crushing device of claim 2 wherein said receptacle
has a concave face and said crushing member has a convex end.
7. The pill crushing device of claim 6 wherein said receptacle
is sized to accept a paper cup.
8. The pill crushing device of claim 2 wherein an end of said handle
is attached to an end of said post.
9. The pill crushing device of claim 2 said upper plate has attached
to the sides thereof downwardly extending support members, said
support members extending generally along one third of said upper
plate from said first end thereof.
10. The pill crushing device of claim 1 wherein said first and
second plates are hinged together at said second ends.
11. A method of crushing pills, comprising the steps of: (a) placing
pills to be crushed into a first paper cup; (b) placing a second
paper cup into said first paper cup, covering said pills; (c) placing
said paper cups into said receptacle of the device of claim 1 while
said device is in said pill-loading position; (d) applying a downward
force to said handle, thereby forcing said device into said pill-crushing
position; (e) removing said force from said handle, allowing said
urging means to urge said device into said pill-loading position;
and (f) removing said paper cups from said device.
Description TECHNICAL FIELD
[0001] The present invention relates to devices for crushing materials
and in particular relates to devices for quickly and securely crushing
crushable pills and other such medicaments to allow patients to
ingest them more easily.
BACKGROUND
[0002] Medicaments are often provided in the form of pills, and
many pills are in the form of tablets comprising compressed agglomerations
of powder. These tablets are capable of being crushed into smaller
pieces and/or powder.
[0003] There are several problems associated with administering
medicaments in a tablet form. Many people have difficulty swallowing
tablets, and it is not uncommon for such people to require that
the tablets be crushed to make them easier to swallow. In an institutional
setting (for example, in a hospital), it is common to crush tablets
into smaller pieces and/or powder and to mix the resulting smaller
pieces and powder into pudding or some other food substance to make
the medicament more easily ingestible.
[0004] At one time, pills were crushed in hospitals using a mortar
and pestle. The use of a mortar and pestle was long ago abandoned,
due to several problems. Primarily, a mortar and pestle required
too much time and energy to use, and required cleaning between uses
to avoid cross-contamination of the medications in the crushed tablets.
[0005] Accordingly, over the years many mechanical devices have
been suggested for crushing pills, among them those devices described
in U.S. Pat. Nos. 2631786 3915393 4003523 4199863 4366930
4694996 4824000 5123601 5178337 5823451 5863001
5915637 5924636 6059209 and 6357679.
[0006] Each one of these prior art pill crushers has disadvantages,
however. Either they are not capable of crushing the large numbers
of pills which are crushed daily in an institutional setting, or
they do not provide means to avoid cross-contamination of crushed
medications unless they are thoroughly cleaned between uses (which
requires a significant amount of time and energy), or they require
a considerable amount of force to use. The latter is a significant
problem in institutional settings where hundreds of pills might
be required to be crushed by a single person (perhaps a nurse) each
day. While large-scale crushers have also been proposed, these are
generally electrically-powered, heavy devices, and are not portable.
[0007] The need remains, accordingly, for a portable pill crusher
capable of easily crushing large numbers of pills using only a small
amount of force, and in which cross-contamination of medications
is easily avoided.
SUMMARY OF INVENTION
[0008] The present invention is a device for crushing crushable
pills. In the most basic embodiment of the invention, upper and
lower plates are attached to one another at one end. The lower plate
has a first, free end and the attached second end. The upper plate
has an upper surface, a first end and the attached second end.
[0009] A receptacle for accepting crushable pills projects upwardly
from the first end of the lower plate, and a crushing member projects
downwardly from the first end of the upper plate. The crushing member
is preferably sized to fit within the receptacle when the two are
positioned together.
[0010] Between the plates is mounted a means for urging the first
ends of the upper and lower plates away from one another. The device
also comprises a post extending upwardly from the lower plate through
the upper plate, with the post positioned between the second end
of the lower plate and the receptacle on the lower plate.
[0011] The post is preferably positioned nearer to said receptacle
than to said second end of said lower plate.
[0012] A handle is provided which is pivotally attached to the
post at a position above the upper plate. The handle may be attached
at one end to the top end of the post. The handle has a lobe extending
downwardly therefrom to abut and apply a camming force to the upper
surface of the upper plate. The device is operable by means of the
handle between a pill-loading position wherein the first ends are
urged apart by the urging means and a pill-crushing position wherein
the first ends are nearer one another, placing the crush member
within the receptacle.
[0013] In one embodiment of the invention, the means for urging
the first ends away from one another comprises a spring coiled around
the post between the lower and upper plates. In an alternate embodiment,
the urging means is a leaf spring attached between the lower plate
and the upper plate. In yet another embodiment, the upper and lower
plates are formed from one sheet of material bent over on itself,
and it is merely the natural elasticity of the material which comprises
the means for urging the ends of the device apart.
[0014] To allow for more efficient placement of pills into the
device, and to perform a good crush, the receptacle may have a concave
face and the crushing member may have a convex end. The receptacle
may be suitably sized to accept one or more paper cups.
[0015] To provide support for the device, the upper plate may have
attached to its sides downwardly extending support members, which
may extend generally along one third of the length of the upper
plate from the first end thereof.
[0016] There is also provided a method of crushing pills, comprising
the steps of (a) placing pills to be crushed into a first paper
cup; (b) placing a second paper cup into the first paper cup, thereby
covering the pills; (c) placing the paper cups into the receptacle
of the device while the device is in the pill-loading position;
(d) applying a downward force to the handle, thereby forcing the
device into the pill-crushing position; (e) removing the force from
the handle, allowing the urging means to urge the device into the
pill-loading position; and (f) removing the paper cups from the
device.
BRIEF DESCRIPTION OF DRAWINGS
[0017] It will be appreciated that the particularized description
of the invention described briefly above which follows hereafter
is rendered by reference to certain specific embodiments of the
invention which are illustrated in the appended drawings. The drawings
depict only a typical embodiment of the invention and are not therefore
to be considered to be limiting of its scope.
[0018] Accordingly, in the accompanying drawings which illustrate
specific embodiments of the invention, but which should not be construed
as restricting the spirit or scope of the invention in any way:
[0019] FIG. 1 is a side view of one embodiment of a pill crusher
of the present invention, in an open or "pill-loading"
position.
[0020] FIG. 2 is a plan view of the top surface of the bottom plate
of the pill crusher shown in FIG. 1.
[0021] FIG. 3 is a plan view of the bottom surface of the top plate
of the pill crusher shown in FIG. 1.
[0022] FIG. 4 is a side view of the pill crusher shown in FIG.
1 in a closed or "pill-crushing" position.
[0023] FIG. 5 is a side view of an alternate embodiment of the
pill crusher shown in FIG. 1 having a leaf spring.
[0024] FIG. 6 is a side view of an alternate embodiment of the
pill crusher of the present invention, with the top and bottom plates
being formed of a single sheet of material.
[0025] FIG. 7 is a side view of an alternate embodiment of the
pill crusher of the present invention, showing the handle having
a non-rounded cam.
DESCRIPTION
[0026] Throughout the following description, specific details are
set forth in order to provide a more thorough understanding of the
invention. However, the invention may be practiced without these
particulars. In other instances, well known elements have not been
shown or described in detail to avoid unnecessarily obscuring the
invention. Accordingly, the specification and drawings are to be
regarded in an illustrative, rather than a restrictive, sense.
[0027] Referring first to FIG. 1 the pill crusher of the present
invention may be constructed generally of two rectangular plates,
a lower plate 10 and an upper plate 20. The device may be used with
lower plate 10 placed upon a flat surface such as a table top or
a counter top.
[0028] Lower plate 10 has two ends, a first end 12 and a second
end 14. Similarly, upper plate 20 also has a first end 22 and a
second end 24. Plates 10 20 are attached to one another at one
end (the respective second ends, as shown in the drawings), and
may be hinged together by means of hinge 60.
[0029] Lower plate 10 has extending upwardly from its upper surface
a receptacle 16 for accepting crushable pills. Receptacle 16 is
also clearly illustrated in FIG. 2. Receptacle 16 is located at
the first end of lower plate 10. As described herein, the term "at
the end" of lower plate 10 is intended merely to describe that
the receptacle is at or near the end of plate 10. It is foreseen
that the receptacle 16 need not be precisely at the very end of
plate 10 but rather need only be nearby. The receptacle should
be considered to be "at the end" of plate 10 as contemplated
by the inventor if the center of the receptacle occupies a longitudinal
position within the first fifth of the length of plate 10 from end
12.
[0030] Similarly, upper plate 20 has a crush member 26 extending
downwardly from the lower surface of plate 20 at the "end"
of plate 20. It is intended that the "end" of plate 20
as described herein means the first fifth of the length of the plate
20 as described above with reference to receptacle 16. The crush
member 26 is illustrated in greater detail in FIG. 3.
[0031] Receptacle 16 and crush member 26 may be of any shape when
view end-on or from the side, but both are preferably round or cylindrical.
The top surface of receptacle 16 is preferably "cup-shaped"
or concave, while the crush member 26 preferably has a convex end.
It will be appreciated from the figures and the description herein
that crush member 26 is sized and configured to fit or "nest"
tightly within receptacle 16 when the device is in a crushing position.
[0032] Referring again to FIG. 1 a post 30 extends upwardly from
the top surface of the lower plate 10 and extends through a hole
(labelled "28" in FIG. 3) formed through upper plate 20.
It will be appreciated that hole 38 should be large enough second
plate 20 to move between an elevated position and a lowered position
as described below without binding on post 30.
[0033] An arm 40 is pivotally attached to post 30 above the top
surface of upper plate 20 at attachment point 35. The post 30 may
be positioned anywhere along the length of lower plate 10 between
the receptacle 16 and second end 14 but is preferably close to
receptacle 16 to allow force applied to handle 40 to provide good
leverage as described in greater detail below. Similarly, post 30
extends through plate 20 at a corresponding point between crush
member 26 and second end 24 but preferably near crush member 26.
[0034] It will be appreciated that an upper plate, hinged to a
lower plate as described herein, would normally tend to fall and
rest on the lower plate due to gravity. Means for urging the first
ends 12 22 of plates 10 20 apart is therefore provided to urge
the first end 22 of the upper plate 20 up and away from the first
end 12 of the lower plate 10 thereby forcing the upper plate 20
into an elevated position above the lower plate 10 and placing the
device into a "pill-loading" position wherein the receptacle
16 is easily accessible to the user. In the embodiment of the invention
shown in FIG. 1 this urging means is conveniently a spring 50 coiled
around the post 30. It should be clear that many other devices to
urge apart the plates might be contemplated by those skilled in
the art, including a leaf spring 52 as shown in FIG. 5 affixed
between plates 10 and 20. Other devices are contemplated by the
inventor but not described herein in detail to avoid obscuring the
invention.
[0035] To transfer force applied to handle 40 to top plate 20
handle 40 is supplied with a lobe 42 which extends downwardly therefrom
and which abuts the upper surface of upper plate 20 as shown in
FIGS. 1 and 4. The lobe 42 acts as a cam to transfer force applied
by a user to the handle 40 to the upper surface of upper plate 20
and in turn to crush member 26 which will crush pills placed within
receptacle 16 if enough force is applied. The lobe 42 is preferably
rounded, but need not be, and may be any shape as long as it is
able to act as a cam on the top surface of upper plate 20. An alternate
cam arrangement is illustrated in FIG. 7 with handle 40 having
a non-rounded cam 44.
[0036] In operation, the device is normally in an open or "pill-loading
position (shown in FIG. 1). As previously described, the device
is urged into this position by spring 50. When it is desired to
crush a pill or a plurality of pills, the pills are placed by the
user into receptacle 16. To avoid cross-contamination of medications,
and to avoid having to clean the device after each use to avoid
cross contamination, the pills may be conveniently placed between
two paper cups 80 as is currently common in the art. A plurality
of pills in between paper cups 80 is illustrated for the sake of
completeness in FIG. 6.
[0037] Referring to FIG. 4 once the pills are inserted by the
user into receptacle 16 the user applies a force to handle 40
moving handle 40 in the direction "D" as shown in FIG.
4. the nature of the construction of the device allows the user
to apply this force with only one hand, if desired. By applying
force to handle 40 as shown in FIG. 4 handle 40 moves from the
elevated position shown in FIG. 1 to the closed or "pill-crushing"
position shown in FIG. 4. As handle 40 moves downwardly, the lobe
42 on handle 40 acts as a cam to transfer the force applied to handle
40 to the top surface of upper plate 20 forcing upper plate 20
downwardly with respect to lower plate 10. As noted above, with
crush member 26 properly configured, crush member 26 is forced against
or even into receptacle 16 thereby crushing the pills contained
therein. In the meantime, spring 50 has been compressed by the downward
motion of upper plate 20 as shown in FIG. 4 and is able to exert
an opposing force on the upper plate when the user relieves the
force which had been applied to handle 40. Upper plate 20 in other
words, then returns to its initial position, and the pills (preferably
contained within paper cups 80) may be extracted from the receptacle
of the device.
[0038] It will be appreciated that the plates 10 20 and especially
upper plate 20 should be constructed of a material strong enough
to withstand the forces applied to it. If the material is too thick
or heavy, however, this limits the portability of the device. To
maintain the portability of the device, a material of slightly less
robust material can be used, if support members 70 are applied to
the sides of upper plate 20 along that length of plate 20 where
the forces are generally applied (perhaps along the first third
of the plate). This is illustrated in FIG. 70.
[0039] As will be apparent to those skilled in the art in the light
of the foregoing disclosure, many alterations and modifications
are possible in the practice of this invention without departing
from the spirit or scope thereof. For example, while the invention
has been described as have a hinge between the lower and upper plates,
the plates need not be hinged together for the invention to work.
In fact, in the embodiment of the invention shown in FIG. 6 the
plates 10 20 are formed from a single sheet of material which has
such natural elastic properties as to normally urge the ends of
plates 10 20 apart, placing the device naturally in an open position.
In this case, the "urging means" 54 (FIG. 6) is simply
the natural elasticity of the material form which plates 10 20
are constructed.
[0040] Accordingly, the scope of the invention is to be construed
in accordance with the substance defined by the following claims.
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