Method and apparatus for disinfecting items

• US 7,338,646 B2
• Filed: 08/01/2002
• Issued: 03/04/2008
• Est. Priority Date: 08/01/2001
• Status: Expired due to Fees

• Current Assignee: Roteck Limited
• Original Assignee: Roteck Limited
• Inventors: Gilbert, David
• Primary Examiner(s): Corcoran; Gladys J P
• Assistant Examiner(s): Joyner; Kevin
• Application Number:
  US10/485,411
• Publication Number:
  US 20040223894A1
• Time in Patent Office: 2,042 Days
• Field of Search: 422/292, 164/12, 164/17
• US Class Current: 422/292
• CPC Class Codes: A61L 2/18 Liquid substances or solutions comprising solids or dissolved gases
• CPC Class Codes: E05B 1/0069 Sanitary doorknobs or handles, e.g. comprising a disinfectant

Abstract

Method and apparatus for disinfecting an item, for example, a handle for a door or a tap in a toilet facility. The apparatus includes a movable member, e.g., a door handle having a contact surface for being manually engaged to move the movable member; germicide applying means for applying germicide to the surface; and an operating mechanism coupled between the movable member and the germicide applying means and operable in response to movement of the movable member for applying germicide to the contact surface after movement of said movable member. The germicide applying means may be a pump. The operating mechanism may act to prime the pump when the door handle is turned to open the door. The germicide is sprayed over the handle after the handle is released and returns to its initial position. The return movement may be retarded.

Claims

1. A handle for operating one of a door, a faucet and a toilet cistern, comprising

a movable member;

a contact surface on the movable member for grasping by a person to move the movable member from a resting position to a second position, the movable member returning to the resting position upon release of the movable member by the person;

germicide applying means for applying the germicide to the contact surface; and

an operating mechanism coupled between the movable member and the germicide applying means to cause germicide to be applied to the contact surface,

characterised in that the operating mechanism directs a spray of at least one of an aerosol and a mist of germicide onto the contact surface during a return movement of the movable member to the resting position such that the spray is produced only after the movable member is released by the person, thereby allowing the spray to land on substantially all of the contact surface and not on the person.

2. The handle as claimed in claim 1, further comprising retarding means are provided for retarding the return movement of the movable member to the resting position after manual release of the contact surface.

3. The handle according to claim 2, wherein the germicide applying means comprises a reservoir for containing the germicide and a pump connected between the reservoir and an outlet for spraying onto the contact surface germicide received from the reservoir via the pump.

4. The handle according to claim 3, wherein the operating mechanism is operable to prime the pump with the germicide during the movement of the movable member from the resting position to the second position.

5. The handle according to claim 4, wherein the pump further comprises an operating element movable to prime the pump and further movable to eject germicide, the operating mechanism being operable in response to the movement and the return of the movable member to move the operating element of the pump.

6. The handle according to claim 5, wherein the operating mechanism further comprises a camming member mounted for turning movement in response to the movement and the return of the movable member, the camming member having a camming surface engaged with the operating element.

7. The handle according to claim 3,

wherein the movable member comprises a resiliently urged surface;

and

wherein the germicide applying means comprises germicide delivery means and a source of germicide and the resiliently urged surface is movable between the first position where it engages the delivery means and the second position where it is not in engagement with the delivery means, wherein the handle is operable to urge the resiliently urged surface from the first position to the second position thereby priming the delivery means with a charge of germicide from the source of germicide, the return of the handle to the resting position causing the resiliently urged surface to adopt the first position, whereby germicide is applied to the handle.

8. A self-sterilizing handle assembly for a door comprising:

a manually operable handle and a spray head, the handle being operable to open the door, characterised in that the handle is arranged, upon manual release of the handle by a user subsequent to operation of the door, to cause the spray head to spray germicide over at least part of the handle, characterized in that movement of the handle subsequent to the manual release of the handle is controlled by a retardation device, the retardation device comprising a flexible-walled tube and a cam that engages the flexible-walled tube and compresses the wall of the flexible-walled tube thereby causing air within the flexible-walled tube to move.

9. A door handle assembly, comprising:

a handle capable of being secured to a door and having a contact surface for enabling the handle to be moved manually by a user, against action of a spring, from a resting position to a second position in order to operate a door catch to permit the door to be opened, wherein the handle returns to the resting position from the second position after the contact surface of the handle has been released by the user; and

means for automatically disinfecting the contact surface of the handle each occasion the door catch is operated, wherein the means for automatically disinfecting includes a germicide reservoir and a pumping mechanism operated by movement of the handle and operative to spray germicide drawn from the germicide reservoir directly onto the contact surface of the handle only during a return movement of the handle from the second position to the resting position.