Medical waste fragmentation and disposal system

• US 4,971,261 A
• Filed: 06/22/1989
• Issued: 11/20/1990
• Est. Priority Date: 06/22/1989
• Status: Expired due to Fees

• Current Assignee: Charles Solomons
• Original Assignee: Charles Solomons
• Inventors: Solomons, Charles
• Primary Examiner(s): Rosenbaum, Mark
• Application Number:
  US07/369,841
• Time in Patent Office: 516 Days
• Field of Search: 241/199.12, 241/101.2, 241/99, 241/282.1, 241/282.2, 241/119, 241/109, 241/100, 241/243, 241/190
• US Class Current: 241/99
• CPC Class Codes: A61M 2005/3282 using mechanical means, e.g. mills
• CPC Class Codes: A61M 5/3278 Apparatus for destroying used needles or syringes needle resheathing means destroying the needle A61M5/321
• CPC Class Codes: B02C 19/0075 specially adapted for disintegrating medical waste sterilisation of refuse A61L11/00; disposal of medical waste B09B3/00
• CPC Class Codes: Y10S 241/606 Medical/surgical waste comminution

Abstract

A portable desk top "medical waste" fragmentation device and disposal system, complying with governmental requirements of maximum residual fragment size and sanitization. The fragmentation device includes a chamber having a rotating blade for fragmenting medical waste such as needles, syringes, vials and extracted teeth. For maximum effectiveness in reducing the medical waste into the requisite fragment size, the blade, with minimal clearance, passes between a U-shaped stationary member. During operation, the U-shaped member serves to momentarily hold the items to be fragmented in a stationary position as the blade fragments it in a shearing-type action. To ensure complete minimum size fragmentation, an agitating member continually throws the fragments into the path of the rotating blade. After the fragmentation is completed to the requisite size, the fragmentation chamber is opened into a disposal chute. The fragmented particles are drawn by centripetal force through the disposal chute into a removable and disposable receptacle having a sterilization or germicidal solution contained therein. The disposable receptacle, with sanitized waste, can thereafter be safely and legally thrown away as ordinary trash.

Claims

1. A device for the fragmentation, sanitization and disposal of medical waste;

the device comprising a container having a motor enclosed therewithin and a fragmentation chamber, separated from the motor, said device further comprising a disposal chute, opening into the fragmentation chamber, for evacuation of fragmented particles of medical waste into a disposable receptacle containing means for sanitizing the fragmented particles, said disposal chute having means for sealing engagement and disengagement with the disposable receptacle;

with the fragmentation chamber containing a rotating blade, powered by the motor;

said fragmentation chamber having two openings, a first opening for introduction of medical waste into the fragmentation chamber, for fragmentation by the rotating blade; and

a second opening which leads to the disposal chute, said device further having means for selectively opening and closing the second opening, with said second opening being selectively opened while the blade is rotating, to effect said evacuation.

2. The device of claim 1 wherein said motor has a rating of at least 1/4 horsepower and rotates the blade at a speed of at least 1600 rpm.

3. The device of claim 1 wherein the fragmentation chamber further includes means for temporarily holding the medical waste for shearing fragmentation by the rotating blade.

4. The device of claim 3 wherein the means for temporarily holding the medical waste comprises one or more rigid stationary members fixedly attached to the wall of the fragmentation chamber and extending in a direction parallel to the plane of the moving blade, with said stationary members being spaced from said plane by a distance no greater than 0.25 inch (0.64 cm) and wherein the stationary members extend for a distance at least half the radius of the circle circumscribed by the rotating blade.

5. The device of claim 4 wherein said rigid stationary members comprise a U-shaped member having parallel elements between which the rotating blade passes.

6. The device of claim 5 wherein said rotating blade comprises an elongated flat metal member having rounded ends and having sharpened sections on the leading edges thereof which pass between the parallel elements of said U-shaped member during the rotation of the blade.

7. The device of claim 4 wherein the device further includes an agitating member which rotates in concert with the rotating blade in a plane substantially parallel to the plane of the rotating blade, said agitating member rotating in a plane adjacent the base of the fragmentation chamber.

8. The device of claim 7 wherein said agitating member comprises a radially extending sweeper blade with airfoil.

9. The device of claim 7 wherein said agitating member comprises a radially extending wire.

10. A device for the fragmentation, sanitization and disposal of medical waste;

the device comprising a container having a motor enclosed therewithin and a fragmentation chamber, separated from the motor, said device further comprising a disposal chute, opening into the fragmentation chamber, for evacuation of fragmented particles of medical waste into a disposable receptacle containing means for sanitizing the fragmented particles, said disposal chute having means for sealing engagement and disengagement with the disposable receptacle;

with the fragmentation chamber containing a rotating blade, powered by the motor;

said fragmentation chamber having two openings, a first opening for introduction of medical waste into the fragmentation chamber, for fragmentation by the rotating blade; and

a second opening which leads to the disposal chute, said device further having means for selectively opening and closing the second opening, with said second opening being selectively opened while the blade is rotating, to effect said evacuation;

wherein said first opening is closed by a cover member having a portion thereof which is interfitted within the walls of said fragmentation chamber and is rotatable relative to said fragmentation chamber whereby said portion of the cover member selectively opens and closes said second opening.

11. The device of claim 10 wherein said cover member comprises a one way opening therein for introduction of medical waste into the fragmentation chamber.