The disclosed embodiments relate to the field of cutting pills for the purposes of dosing or making pills easier to swallow.
It is known to cut pills using various cutting devices. With this sort of device, the pill is rested on a surface (e.g., a rubber pad), which serves as a lower jaw. The pill, when intended for splitting, is nested between two converging angled walls. The two walls extend up from the lower jaw, and aid in centering the pill. A straight-edged blade extends down from an upper jaw that is hingably attached to the lower jaw. When the upper jaw is brought down, the razor cuts the pill. The razor blade is typically a straight razor or anvil-type blade that splits the pills using a crushing force along the sharp point of the blade. Similar to splitting a log with an ax, this method uses pressure to fracture the pill along the sharp edge of the blade. In turn, this impacts the precision of the “split,” especially with standard pills which have convex exterior surfaces, often resulting in pill fragments and irregular surfaces where the cut has been made. Consequently, this adversely affects the accuracy of medication dosage.
Some common pill shapes include convex-faced elongated tablets, convex-faced round tablets, and flat-faced round tablets. The diameter and surface curvature of convex tablets may vary. For example, a typical diameter for convex tablets is about 8 mm. A shallow convex tablet may have a radius of curvature of about 13.5 mm, while a standard convex tablet may have a radius of curvature of about 9.5 mm.
In an embodiment, a cutting device is provided. The cutting device includes a first blade having a first sharp edge aligned in a first direction, and a second blade having a second sharp edge aligned in a second direction, opposite the first direction. The second blade is oriented adjacently in proximity with the first blade so that they may slide closely besides one another. The first sharp edge has a first concavely-curved indent, and the second sharp edge has a second concavely-curved indent aligned opposite the first concavely-curved indent. The first and second concavely-curved indents form an opening between the first sharp edge and the second sharp edge. The opening is adapted to receive a pill for cutting when the first blade is moved in the first direction and the second blade is concurrently moved in the second direction, which effectively splits the pill for precise dosing and reduced waste.
In another embodiment, a pill-cutting device is provided. The pill-cutting device includes an upper blade having a first curved indent and a lower blade positioned beneath the upper blade. The lower blade has a second curved indent aligned with and facing the first curved indent. The first and second curved indents are arranged to form an opening between them. A handle is mechanically coupled with the upper blade for moving the upper blade. A lever is mechanically coupled by a first end to the lower blade, with the lever being arranged for pivoting about a fulcrum. A rod mechanically couples the handle with a second end of the lever, opposite the fulcrum from the first end, such that motion of the handle concurrently moves the lower blade and the upper blade in opposite directions as the lever pivots about the fulcrum.
Illustrative embodiments are described in detail below with reference to the attached drawing figures, which are incorporated by reference herein and wherein:
The drawing figures do not limit the pill-cutting device to the specific embodiments disclosed and described herein. The drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the pill-cutting device.
Embodiments of this disclosure provide systems for cutting pills, including medical tablets, vitamins, supplements, etc. The embodiments involve the use of opposed concave-shaped blades. The blades use compression to both cut and split the pill simultaneously. Embodiments of this disclosure provide a superior, reliable, and more accurate cut without fracturing the pill. Compared to conventional designs that split by breaking the pills, the systems disclosed herein primarily cut, which enables more-precise dosing with less waste. Although useful for numerous pill shapes and types, the disclosed device is ideal for convex-shaped pills which can be very challenging to cut with a straight blade.
In the disclosed embodiment, a pill-cutting device according to this disclosure comprises a pair of concavely-curved sharp blades that are adjacently aligned in opposition with one another. Various embodiments relate to the use of these curved blades in different physical arrangements, some (but not all) of which are described below. The combination of the curved blades and their movement about a fulcrum result in a combined shearing tension and cutting action along a plane formed between the opposed blades. Additionally, a single concavely-curved blade located on either as an upper or lower blade could be used and still meet the objectives of what is disclosed. Thus, the invention should not be limited to any number of blades unless so specified in the claims. Obviously, the pill-cutting device may be used to cut other objects including edible articles, without departing from the scope hereof.
As depicted in
In certain embodiments, the upper and lower blades 120, 130 may include only one opening. However, having more than one opening enables cutting of more than one pill at a time. Additionally, providing differently sized openings enables matching a diameter of an opening with a pill diameter, which may be helpful for cutting otherwise difficult to cut pills (e.g., convex-shaped pills), as further described below in connection with
Upper blade 120 is aligned adjacent lower blade 130 as best depicted in
Upper blade 120 is mechanically coupled with a handle 110. When a user presses down on handle 110, this causes upper blade 120 to move downwardly. Concurrently, lower blade 130 moves upwardly via a drive mechanism, such as a rod, lever, and fulcrum arrangement described below. For embodiments without a lower blade, a supporting surface may be used in place of lower blade 130. In certain embodiments, a first blade extends from a first member opposite a second member. The second member may include a supporting surface for holding a pill or a second blade that extends out from the second member opposite the first blade.
As the handle 110 is pressed downwardly, upper and lower blades 120, 130, being aligned adjacent with one another, slide passed each other thereby closing first and second openings 201, 202 either partially or fully, as depicted in
When a user pushes handle 110, a first rod 141 and a second rod 142 are mechanically coupled with handle 110 such that the rods move in concert with the handle. Each of first rod 141 and second rod 142 engage with a first lever arm 151 and a second lever arm 152, respectively. First lever arm 151 and second lever arm 152 are arranged for pivoting about a first fulcrum 161 and a second fulcrum 162, respectively. As handle 110 moves downwardly, an outer portion of each lever arm is moved downwardly such that the lever arms pivot about their respective fulcrums, causing an inner end of each lever arm to push upwardly on lower blade 130. A first spring 171 and a second spring 172 are attached to a bottom member 115, which may be part of a bottom handle or part of a catch basin for collecting cut pills (see e.g.,
As handle 110 is released, first spring 171 and second spring 172 push upwardly on the outer portion of each lever arm causing the lever arms and lower blade 130 to counter-pivot back to their original position (as depicted in
In some embodiments, a single rod, lever, and fulcrum arrangement may be used. For example, toward the middle of the blades, a single rod may extend from handle 110 to a single lever that engages an underside of lower blade 130 near its mid-section (between first and second openings 201 and 202).
Pill-cutting device 300 may be used to cut three pills simultaneously or to optimize cutting of different diameter pills. In the open position, upper blade 120 overlaps slightly with lower blade 130 outside of the curved indents to help keep the blades aligned adjacent to one another (in the manner described above for pill-cutting device 100).
As depicted in
Any of the embodiments discussed herein (e.g., pill-cutting device 100) may be incorporated into a housing of suitable design and dimensions.
Upper housing 181 includes a first and second through-hole (indicated with dashed lines in
Catch basin 183 provides a floor of the housing and replaces bottom member 115 of pill-cutting device 100,
A cutting plane is a plane through the pill or article to be cut, which is determined at least in part by the plane formed by upper blade 120. In certain embodiments, the cutting plane is aligned between upper blade 120 and lower blade 130. Prior to cutting, a pill is aligned with the cutting plane. For example, a pill may be centered across the cutting plane prior to cutting.
Prior to cutting, pill 200 is centered using apparatus 190. Arrows in
First and second arms 191, 192 are oriented transversely from upper and lower blades 120, 130. In other words, the length of upper and lower blades 120, 130 are arranged longitudinally and first and second arms 191, 192 are oriented perpendicular to upper and lower blades 120, 130. Each of first arm 191 and second arm 192 are mechanically coupled to a mechanism for moving transversely. For example, as depicted in
Pill-centering apparatus 190 may be activated by pressing inwardly on one or both of arms 191, 192 or components coupled thereto, such as vertical bars 193, 194. Upon activation, pill 200 is automatically moved transversely to a central position such that a midpoint of pill 200 is substantially aligned with a cutting plane between blades 120, 130.
Many different arrangements of the various components depicted, as well as components not shown, are possible without departing from the spirit and scope of what is claimed herein. Embodiments have been described with the intent to be illustrative rather than restrictive. Alternative embodiments will become apparent to those skilled in the art that do not depart from what is disclosed. A skilled artisan may develop alternative means of implementing the aforementioned improvements without departing from what is claimed.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations and are contemplated within the scope of the claims. Not all steps listed in the various figures need be carried out in the specific order described.
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 62/621,883, entitled Pill-Cutting Device and filed Jan. 25, 2018, the disclosure of which is herein incorporated by reference in its entirety.
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Number | Date | Country | |
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20190224076 A1 | Jul 2019 | US |
Number | Date | Country | |
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62621883 | Jan 2018 | US |