# US 5,708,259 A · Microwave decomposition machine with output door mechanism

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- Number: US 5,708,259 A
- Document ID: US5708259A
- Status: Granted
- Kind: A
- Application number: 08/428,764
- Filed: 1995-04-24
- Granted: 1998-01-13
- Earliest claimed: 1994-05-06
- Assignees: Industrial Technology Research Institute
- Inventors: Yuh-Ren Shieh; Chi-non Chen; Jey-cherng Chen; Chun-yuh Yu
- Web page: https://patentgrep.com/patent/US5708259A

## CPC

- A61L 2/12: Microwaves
- A61L 11/00: Methods specially adapted for refuse {(disintegrating medical waste B02C19/0075; disposal of medical waste B09B3/00)}
- B09B 3/35: Shredding, crushing or cutting
- B09B 3/50: involving radiation, e.g. electro-magnetic waves
- H05B 6/80: Apparatus for specific applications (stoves or ranges F24C7/02)
- B09B 2101/65: Medical waste
- H05B 2206/045: Microwave disinfection, sterilization, destruction of waste...
- Y10S 241/606: Medical/surgical waste comminution
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- B09B: DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An output door mechanism for a microwave decomposition machine allows a rotating tank to be coupled to a fixed waveguide with both a vacuum and a microwave seal. The fixed waveguide delivers microwave power to the rotating tank in a decomposition machine. A moveable end cover joins the rotating tank to the fixed waveguide providing the rotating tank with a vacuum and microwave seal during the decomposition of material and discharge of the tank after the decomposition has been completed. The output door mechanism uses a rolling bearing to form a rolling seal, a sliding bearing to form a sliding seal, and a metallic bellows to form a flexible seal. A plunger compresses a spring to seal the end cover to the rotating tank. When the plunger no longer applies compressive force to the spring the end cover separates from the rotating tank to allow discharge of the decomposed material.

## Claims

### Claim 1

An output door mechanism forming a rotary joint between a rotary tank and a fixed waveguide, comprising:
a fixed waveguide;
a rotary tank, wherein said rotary tank can be rotated relative to said fixed waveguide;
a moveable end cover joining said rotary tank to said fixed waveguide, wherein said end cover rotates with said rotary tank relative to said fixed waveguide;
a vacuum sealing gasket between said end cover and said rotary tank, wherein said vacuum sealing gasket can provide a gas tight seal between said end cover and said rotary tank;
a microwave sealing gasket between said end cover and said rotary tank, wherein said microwave sealing gasket can provide a microwave energy seal between said end cover and said rotary tank;
a rolling bearing forming a rolling seal between said fixed waveguide and said end cover;
a sliding bearing forming a sliding seal between said fixed waveguide and said end cover;
a metallic bellows forming a flexible seal between said end cover and said fixed waveguide, wherein said rolling bearing, said sliding bearing, and said metallic bellows form a gas tight seal between said end cover and said fixed waveguide; and
a means for moving said moveable end cover.

### Claim 2 (depends on 1)

The mechanism of claim 1 wherein said vacuum sealing gasket is rubber.

### Claim 3 (depends on 1)

The mechanism of claim 1 wherein said microwave sealing gasket is stainless steel mesh or copper mesh.

### Claim 4 (depends on 1)

The mechanism of claim 1 wherein said sliding bearing is a graphite bearing.

### Claim 5 (depends on 1)

The mechanism of claim 1 wherein said means for moving said movable end cover further comprises:
a plunger to force said end cover against said rotary tank;
a spring between said movable end cover and said fixed waveguide wherein said spring is compressed when said end cover is forced against said rotary tank; and
an actuator to move said plunger.