Electric field shielding apparatus

• US 6,226,450 B1
• Filed: 12/24/1999
• Issued: 05/01/2001
• Est. Priority Date: 01/21/1997
• Status: Expired due to Fees

• Current Assignee: Myoung Jun Lee
• Original Assignee: Myoung Jun Lee
• Inventors: Lee, Myoung Jun
• Primary Examiner(s): Walberg, Teresa
• Assistant Examiner(s): DAHBOUR, HENRY
• Application Number:
  US09/471,666
• Time in Patent Office: 494 Days
• Field of Search: 392/383, 392/384, 392/385, 392/379, 392/380, 392/381, 392/404, 392/409, 392/476, 219/225, 219/533
• US Class Current: 392/385
• CPC Class Codes: A45D 20/10 Hand-held drying devices, e.g. air douches
• CPC Class Codes: H05B 1/0272 For heating of fabrics
• CPC Class Codes: H05B 2203/007 using multiple electrically connected resistive elements or resistive zones
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 2203/014 Heaters using resistive wires or cables not provided for in H05B3/54
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 2203/033 Heater including particular mechanical reinforcing means
• CPC Class Codes: H05B 3/342 heaters used in textiles

Abstract

An electric field shielding apparatus used with an electrical device comprises a housing body at least partially surrounding the electrical device; and a conductive shield medium arranged with the shape of the housing body to at least partially surround the electrical device to substantially reflect electric field generated from the electrical device. The conductive shield medium is a thin conductive layer coated on interior surface of the housing body. Alternatively, the conductive shield medium is a conductive mesh placed against interior surface of the housing body. In addition, the conductive shield medium may be integrally mixed with the housing body to make the housing body substantially electrically conductive. In other words, the conductive shield medium may be in a powder form which is mixed with plastic power, the mixture of which is then heated and poured into an injection mold to form a housing body of an electric device. To effectively block or absorb the electric field generated from a device, the conductive shield medium is preferably grounded by being connected to a ground prong of a power outlet.

Claims

1. An electric heating and field shielding apparatus for generating heated air and used with an electrical motor, the electric field shielding apparatus comprising;

a heating element;

an electrical motor;

a housing body at least partially surrounding the electrical motor; and

a conductive shielding medium arranged with the shape of the housing body to at least partially surround the electrical motor to substantially absorb electric field generated from the electrical motor.

2. The electric field shielding apparatus of claim 1, wherein the conductive shield medium is a thin conductive layer coated on an interior surface of the housing body.

3. The electric field shielding apparatus of claim 2, wherein the conductive layer is grounded.

4. The electric field shielding apparatus of claim 1, wherein the conductive shield medium is a conductive mesh placed against interior surface of the housing body.

5. The electric field shielding apparatus of claim 4, wherein the conductive mesh is grounded.

6. A hair dryer having an electric field shielding apparatus and an electrical motor, the hair dryer comprising:

a heating element;

a housing body at least partially surrounding the electrical motor; and

a conductive shield medium arranged with the shape of the housing body to at least partially surround the electrical motor to substantially absorb electric field generated from the electrical motor.

7. The hair dryer of claim 6, wherein the conductive shield medium is a thin conductive layer coated on an interior surface of the housing body.

8. The hair dryer of claim 7, wherein the conductive layer is grounded.

9. The hair dryer of claim 6, wherein the conductive shield medium is a conductive mesh placed against interior surface of the housing body.

10. The hair dryer of claim 9, wherein the conductive mesh is grounded.