Multiple pill or tablet splitter

Abstract

A manually operated multiple pill or tablet splitter for simultaneously cutting or splitting a plurality of pills in a single operation is disclosed. The device includes a base member that provides a flat top surface for loading the pills, spring loaded alignment bars for containing, aligning, and holding the pills or tablets in a straight line, and a close fitting cover member having a cutting blade fitted inside which is surrounded by a retractable spring biased blade guard to cover the blade prevent injury. When the cover is manually pushed down onto the base member, the blade guard is retracted and the cutting blade bisects all the pills or tablets in a single operation.

Claims

1. A manually operated multiple pill or tablet splitter for simultaneously cutting or splitting a plurality of pills in a single operation, comprising: a hollow generally rectangular base member having an upper portion with a flat top end wall for receiving and supporting a plurality of pills or tablets, opposed longitudinal side walls and longitudinally opposed rounded ends, and a contiguous lower portion with an open bottom end surrounded by a wider and longer side wall of substantially the same configuration extending upwardly a distance from said open bottom end and terminating in a peripheral shoulder adjoining said upper portion; a pair of elongate longitudinal spring biased alignment bars movably mounted on said base member flat top end wall, and each having a generally L-shaped transverse cross section with a horizontal leg and a straight upstanding vertical leg with a knurled outer surface, said alignment bars urged toward one another under pressure of a tension spring to contain, align, and firmly retain the pills or tablets in a straight line, and prevent them from slipping; a removable cover member having a top end wall, opposed longitudinal side walls and longitudinally opposed rounded ends, and an open bottom end configured to be slidably received on said base member upper portion, a longitudinal cutting blade mounted on an underside of said top end wall along the center thereof and extending downwardly a distance therefrom terminating in a cutting edge; and a longitudinal retractable blade guard movably mounted beneath an underside of said cover member top end wall having a generally U-shaped transverse cross section and a central longitudinal slot extending along the center thereof, said blade guard spring biased downwardly by a pair of compression springs at each end to retractably cover said cutting edge of said cutting blade; wherein said cover member is slidably received on said base member upper portion and manually pressed straight downward relative thereto, said blade guard contacts the pills or tablets retained by said alignment bars and is retracted to expose said cutting edge and the cutting blade bisects all the pills or tablets in a single operation, and when downward force is reduced said cutting edge is surrounded by said blade guard to prevent injury.

2. The manually operated multiple pill or tablet splitter according to claim 1, wherein said cutting blade is secured in a central generally rectangular longitudinal cutting blade support formed on the underside of said cover member top end wall along the center thereof that extends downwardly a distance therefrom and its said cutting edge extending a short distance downwardly therefrom; a pair of downwardly extending tubular posts are formed on the underside of said cover member top end wall, each disposed a distance outwardly from respective opposed ends of said blade support and extending downward a distance beyond said blade support; said blade guard has a pair of holes therethrough disposed a distance outwardly from said central longitudinal slot near respective opposed ends thereof; each said compression spring is received on the exterior of each of said tubular posts with opposed ends disposed between said underside of said the cover member top wall and a top side of said blade guard, and retained by a pair of headed screws having their shanks passing through said holes of said blade guard.

3. The manually operated multiple pill or tablet splitter according to claim 1, wherein said alignment bars are operatively connected together by a tension spring and rotor assembly disposed in said base member so as to move toward one another and away from one another simultaneously.

4. The manually operated multiple pill or tablet splitter according to claim 3, wherein a pair of depending tubular posts extend downward a distance from said the underside of said base member top end wall in longitudinally spaced relation, and a pair of diametrically opposed longitudinally spaced apart arcuate slots extend through said base member top end wall equidistant from each said depending tubular post, and said tension spring and rotor assembly comprises: a rotor member rotatably mounted on each said depending tubular post, respectively, each rotor member having a flat disk-shaped main body portion, a central tubular member extending downwardly from the underside thereof with a central bore extending through said central tubular member and said main body portion, a pair of diametrically opposed smaller diameter tubular upper posts extending upwardly a distance from a top surface of said disk-shaped main body portion equidistant from said central bore of said rotor, and a smaller diameter tubular lower post extending downwardly a distance from an underside of said disk-shaped main body portion radially spaced from said central bore of said rotor, each of said smaller diameter tubular upper and lower posts having a central bore; said central tubular member of each said rotor rotatably received on a respective said tubular post on said underside of said base member top end wall, and said smaller diameter tubular upper posts of each said rotor slidably received through respective said diametrically opposed longitudinally spaced apart arcuate slots extending through said base member top end wall; said horizontal leg of each of said alignment bars having a hole therethrough near longitudinally opposed ends, and secured by a headed pin to a respective said smaller diameter tubular upper post of said rotor received through a respective said diametrically opposed longitudinally spaced apart arcuate slot extending through said base member top end wall; said tension spring has one end connected to one said tubular post on said underside of said base member the top end wall by a headed pin, and the opposed end of said tension spring is connected to a said smaller diameter tubular lower post that extends downwardly from said underside of said disk-shaped main body of one said rotor by a headed pin; and the tension force of said tension spring pulls said alignment bars toward the center of said base member, and the alignment bars remain parallel to each other and equidistant from the centerline of the said base member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is an exploded perspective view of the multiple pill or tablet splitter device in accordance with the present invention, shown with the cover member removed and the base member in an assembled condition with the spring loaded alignment bars holding a plurality of pills or tablets in a straight line on the top surface of the base member.

(2) FIG. 2 is an exploded perspective of the base member, shown with the components in an unassembled condition.

(3) FIG. 3 is top plan view of the base member, shown with the alignment bars in a fully open position.

(4) FIG. 4 is longitudinal cross section view of the base member assembly, taken along line 4-4 of FIG. 3.

(5) FIG. 5 is bottom plan view of the base member assembly, shown with the rotor members connected by the tension spring and rotated to place the alignment bars in the fully open position.

(6) FIG. 6 is transverse cross section view of the base member assembly, taken along line 6-6 of FIG. 3, shown with the alignment bars in the fully open position.

(7) FIG. 7 is an exploded perspective of the cover member, shown with the components in an unassembled condition.

(8) FIG. 8 is top plan view of the cover member.

(9) FIG. 9 is longitudinal cross section view of the cover member, taken along line 9-9 of FIG. 8.

(10) FIG. 10 is transverse cross section view of the cover member, taken along line 10-10 of FIG. 9.

(11) FIG. 11 is top plan view of the cover member assembly.

(12) FIG. 12 is longitudinal cross section view of the cover member assembly, taken along line 12-12 of FIG. 11, shown with the blade guard biased downward from the cutting blade by the compression springs.

(13) FIG. 13 is transverse cross section view of the cover member assembly, taken along line 13-13 of FIG. 11, shown with the blade guard biased downward from the cutting blade by the compression springs.

(14) FIG. 14 is top plan view of the base member assembly, shown with the alignment bars moved to grip and align a plurality of pills or tablets.

(15) FIG. 15 is transverse cross section view of the base member assembly griping a row of pills or tablets, taken along line 15-15 of FIG. 14, and the cover member assembly received on the base member assembly being pressed downward to split the pills or tablets.

DETAILED DESCRIPTION OF THE INVENTION

(16) Referring to the drawings by numerals of reference, there is shown in FIG. 1, a multiple pill or tablet splitter device 10 in accordance with the present invention. The major components of the pill or tablet splitter device 10 include a base member 11 and a cover member 50, shown with the cover member removed. As described hereinafter, the pill or tablet splitter device 10 includes a pair of spring loaded alignment bars 30 movably mounted on the top surface of the base member 11 that hold a plurality of pills or tablets P in a straight line on the top surface of the base member, as shown in FIG. 1.

(17) Referring additionally to FIGS. 2-6, the base member 11 is a hollow generally rectangular member having a top end wall 12, an open bottom end, and longitudinally opposed rounded ends. The base member 11 has a wider and longer lower portion 13 of substantially the same profile that extends upwardly a distance from the open bottom end and terminates in a peripheral shoulder 14. A pair of tubular posts 15 extend downward a distance from the underside of the top end wall of the base member 11 in longitudinally spaced relation, and a pair of diametrically opposed arcuate slots 16 extend through the top end wall 12 equidistant from each post.

(18) A rotor 20 is rotatably mounted on each tubular post 15 on the underside of the top end wall of the base member 11. Each rotor 20 has a flat disk-shaped main body portion 21, a central tubular member 22 extending downwardly from the underside thereof with a central bore 23 extending through central tubular member and the main body of the rotor. A pair of diametrically opposed smaller diameter tubular upper posts 24 extend upwardly a distance from the top surface of the main body 21 of each rotor 20 equidistant from the central bore 23 of the rotor. The central tubular member 22 of each rotor 20 is rotatably received on a respective tubular post 15 on the underside of the top end wall of the base member 11, and the two smaller diameter tubular upper posts 24 of each rotor are slidably received through the respective diametrically opposed arcuate slots 16 extending through the top end wall of the base member 11. A smaller diameter tubular lower post 25 extends downwardly a distance from the bottom surface of the main body of each rotor 20 radially spaced from the central bore of the rotor. Each of the smaller diameter tubular upper and lower posts 24 and 25 has a central bore.

(19) As discussed briefly above, a pair of alignment bars 30 are used to hold a plurality of pills or tablets P in a straight line on the top surface of the base member 11. As best seen in FIGS. 2, 3, and 6, each alignment bar 30 is an elongate member having a generally L-shaped transverse cross section with a wider longitudinal leg 31 having a pair of holes 32 therethrough in longitudinally spaced relation, and an upstanding shorter longitudinal leg 33 having a knurled outer surface. The holes 32 through each wider longitudinal leg are received on two of the smaller diameter tubular upper posts 24 of each rotor 20 that extend through the respective diametrically opposed arcuate slots 16 in the top end wall 12 of the base member 11. As best seen in FIGS. 1, 2, and 6, the alignment bars 30 are retained on the tubular upper posts by a headed pin 34 whose shank is pressed into the central bore of the upper posts of each rotor 20. The knurled surface of the laterally opposed upstanding shorter longitudinal legs of the alignment bars 30 aid in gripping and preventing the aligned pills or tablets P from slipping.

(20) Referring again to FIGS. 2, 4, and 5, a tension spring 40 has one end connected to one tubular post 15 on the underside of the top end wall of the base member 11 by a headed pin 34 whose shank is pressed into the central bore of the tubular post. The opposed end of the tension spring 40 is connected to the smaller diameter tubular lower post 25 that extends a distance from the bottom surface of the main body of the other rotor by a headed pin 34 whose shank is pressed into the central bore of the smaller diameter lower tubular post. Thus, the tension force of the spring 40 acts to pull the alignment bars 30 toward the centerline of the base member 11. The alignment bars 30 always remain parallel to each other and equidistant from the centerline of the base member 11.

(21) Referring now to FIGS. 7-13, the cover member 50 is a hollow generally rectangular member having a top end wall 51, an open bottom end, and longitudinally opposed rounded ends. The cover member 50 is configured to be removably and slidably received on the upper portion of the base member 11 above the peripheral shoulder 14. A central generally rectangular cutting blade support 52 formed on the underside of the top end wall 51 of the cover member 50 along the centerline thereof extends downwardly a distance therefrom, and a pair of tubular posts 53, each disposed a distance outwardly from the respective opposed ends thereof, extend downward a distance from the underside of the top end wall of the cover member and a distance beyond the blade support 52. A cutting blade 60 is secured in the blade support 52 and its cutting edge extends a short distance downwardly therefrom. In a preferred embodiment, but not limited thereto, the cutting blade 60 is secured in the blade support 52 during a molding operation. Each of the tubular posts on the underside of the cover member 50 has a central bore. A compression spring is received on the exterior of each of the tubular posts on the underside of the cover member 50.

(22) A longitudinal blade guard 61 (FIGS. 7, 12, and 13) having a generally U-shaped transverse cross section and a central longitudinal slot 62 extending along the center thereof retractably covers the exposed cutting edge of the cutting blade 60. The blade guard 61 has a pair of holes 63 therethrough disposed a distance outwardly from the central longitudinal slot 62 near respective opposed ends thereof. The blade guard 61 is supported on the outer end of the compression springs 70 and retained by a pair of headed screws having their shanks passing through the holes at the opposed ends thereof. Thus, the compression springs retractably support the blade guard 61 a distance from the cutting blade 60.

OPERATION

(23) As shown in FIGS. 14 and 15, in operation, the cover member 50 is removed, the alignment bars 30 are manually spread open with the user's fingers, and the pills or tablets P to be split are placed onto the top surface of the base member 11 in a row. Oblong pills can be accommodated by loading them so that the long axes of the pills are perpendicular to the cutting blade. The spring biased alignment bars 30 are then allowed to close onto the outside diameter or the outer ends of the pills or tablets P, thus aligning them in a straight line directly on the centerline of the base member 11. The knurled surfaces of the laterally opposed upstanding shorter longitudinal legs 33 of the alignment bars 30 aid in gripping and preventing the aligned pills or tablets P from slipping. The cover member 50, with its interior cutting blade 60, is then placed over the upper portion of the base member 11 such that the retractable spring biased blade guard 61 is in contact with the row of pills or tablets P, thereby holding them in place, and the cover member 50 is supported by gravity by the blade guard and its associated springs.

(24) Then, the cover member 50 is manually pushed down against the spring bias of the compression springs 70 such that the retractable spring biased blade guard 61 is retracted and the cutting blade 60 extends through the slot 62 in the blade guard 61 and bisects all of the pills or tablets P in a single operation. As the cutting blade 60 bisects the pills or tablets, the alignment bars 30 move laterally apart under the force of the tension spring 40 to allow the cutting blade to pass through without crushing the pills or tablets. As the cover member 50 comes to rest on the peripheral shoulder 14 of the base member 11, the cutting blade edge comes to rest a short distance from the top surface of the base member, thus preventing the cutting blade 60 from cutting into the top surface of the base member. The cover member 11 is then removed, the alignment bars 30 are spread apart, and the pill halves are cleared away. When the cover member 50 is removed, the cutting blade is surrounded by the retractable blade guard 61 to cover the blade and prevent injury.

(25) The pill or tablet capacity of the device is determined by the length of the alignment bars 30 and the diameter or outer periphery of the pills. In the illustrated example of the present invention, the device will accommodate up to fifteen 5 mm diameter pills and up to five 15 mm diameter pills.

(26) It should be understood that the present device can be used to bisect any object that will fit within the range of the alignment bars, so long as the material can be cut with hand pressure, including disks, rectangles, and other polygons. The requirement is that on each pass all of the objects must be the same size.

(27) While the present invention has been disclosed in various preferred forms, the specific embodiments thereof as disclosed and illustrated herein are considered as illustrative only of the principles of the invention and are not to be considered in a limiting sense in interpreting the claims. The claims are intended to include all novel and non-obvious combinations and sub-combinations of the various elements, features, functions, and/or properties disclosed herein. Variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art from this disclosure, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed in the following claims defining the present invention.