Cam drive system for an automated medication cart
First Claim
1. A drive system for an automated medication cart which includes a plurality of vertically spaced medication trays, comprising;
- a base assembly, including a motor mounting assembly;
a motor, having a drive shaft, responsive to control commands, mounted on the motor mounting assembly;
a drive shaft case member;
a cam assembly which includes a plurality of spaced cam members therealong, each cam member including a tray engaging portion, wherein the cam members are arranged such that the tray engaging portion of each cam member has a unique angular position around the circumference of the cam assembly;
a first drive assembly for selectively engaging the motor with the drive shaft case member and the cam assembly, such that rotation of the motor in one rotational direction will rotate both the drive shaft case member and the cam assembly;
and a second drive assembly for selectively engaging the motor with the cam assembly, such that rotation of the motor in an opposing rotational direction will rotate just the cam assembly, wherein the drive shaft case member includes a plurality of cam follower assemblies, one for each cam member, each cam follower assembly including one portion which engages an associated cam member, and another portion which engages a tray associated with the cam element, wherein when the one portion engages the cam element, rotation of the motor in the opposing rotational direction results in rotation of the associated engaged tray to a desired angular position.
2 Assignments
0 Petitions
Accused Products
Abstract
The system includes a plurality of vertically spaced medication trays with a base assembly and a motor, responsive to computer commands, mounted on the base assembly. A drive shaft case member extends vertically from the base assembly. A cam assembly includes a plurality of spaced cam members, each cam member having concave portions and lobe portions on a peripheral surface thereof. A first drive clutch selectively engages the motor with both the drive shaft case member and the cam assembly for rotation of both in one direction, while a second drive clutch selectively engages the motor with just the cam assembly for rotation thereof in an opposing direction. The drive shaft case member has a cam follower assembly associated with each cam member, wherein one portion of the cam follower assembly engages the cam element and another portion engages an associated tray when the cam follower engages a selected concave portion on the cam element associated with the tray.
22 Citations
18 Claims
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1. A drive system for an automated medication cart which includes a plurality of vertically spaced medication trays, comprising;
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a base assembly, including a motor mounting assembly; a motor, having a drive shaft, responsive to control commands, mounted on the motor mounting assembly; a drive shaft case member; a cam assembly which includes a plurality of spaced cam members therealong, each cam member including a tray engaging portion, wherein the cam members are arranged such that the tray engaging portion of each cam member has a unique angular position around the circumference of the cam assembly; a first drive assembly for selectively engaging the motor with the drive shaft case member and the cam assembly, such that rotation of the motor in one rotational direction will rotate both the drive shaft case member and the cam assembly; and a second drive assembly for selectively engaging the motor with the cam assembly, such that rotation of the motor in an opposing rotational direction will rotate just the cam assembly, wherein the drive shaft case member includes a plurality of cam follower assemblies, one for each cam member, each cam follower assembly including one portion which engages an associated cam member, and another portion which engages a tray associated with the cam element, wherein when the one portion engages the cam element, rotation of the motor in the opposing rotational direction results in rotation of the associated engaged tray to a desired angular position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An automated portable medication cart, comprising:
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a housing; a drive system for a plurality of vertically spaced medication trays, supported within the housing the drive system, comprising; a base assembly, including a motor mounting assembly and a wheel assembly which permits the cart to be moved about; a motor, having a drive shaft, responsive to control commands, mounted on the motor mounting assembly; a drive shaft case member; a cam assembly which includes a plurality of spaced cam members therealong, each cam member including a tray engaging portion, wherein the cam members are arranged such that the tray engaging portion of each cam member has a unique angular position around the circumference of the cam assembly; a first drive assembly for selectively engaging the motor with the drive shaft case member and the cam assembly, such that rotation of the motor in one rotational direction will rotate both the drive shaft case member and the cam assembly; and a second drive assembly for selectively engaging the motor with the cam assembly, such that rotation of the motor in an opposing rotational direction will rotate just the cam assembly, wherein the drive shaft case member includes a plurality of cam follower assemblies, one for each cam member, each cam follower assembly including one portion which engages an associated cam member, and another portion which engages a tray associated with the cam element, wherein when the one portion engages the cam element, rotation of the motor in the opposing rotational direction results in rotation of the associated engaged tray to a desired angular position. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification