Radiation shielding apparatus for a radio transmitting device

• US 5,335,366 A
• Filed: 02/01/1993
• Issued: 08/02/1994
• Est. Priority Date: 02/01/1993
• Status: Expired due to Fees

• Current Assignee: John J Daniels
• Original Assignee: John J Daniels
• Inventors: Daniels, John J.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): FAILE, ANDREW I
• Application Number:
  US08/012,446
• Time in Patent Office: 547 Days
• Field of Search: 455/89, 455/90, 455/95, 455/100, 455/117, 455/128, 455/129, 343/702, 343/718, 343/841, 379/58-59, 379/437, 379/447
• US Class Current: 455/575.5
• CPC Class Codes: H01Q 1/245 with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
• CPC Class Codes: H04B 1/3838 Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
• CPC Class Codes: H04B 1/3888 Arrangements for carrying or protecting transceivers

Abstract

A radiation shielding apparatus for a radio transmitting device, such as a cellular phone. A radiation shield is disposed between a radiation component and a user to prevent unwanted exposure of the user to emanating radiation from the radiation emanating component. The cellular telephone radio transmitting device may be a hand-held cellular telephone, and the radiation emanating component may be an internal or external antenna or any other electromagnetic radiation source, such as a transmitter. The radiation shield can be retrofitted to an existing cellular telephone, or may be designed specific for different models of cellular phones. The radiation shield can absorb, block and/or reflect electromagnetic wave radiation to shield the user of such cellular telephones from unwanted and possibly harmful exposure to electromagnetic wave radiation.

Claims

1. A radiation shielding apparatus in combination with a cellular telephone radio transmitting device having a radiation emanating external antenna for transmission of electromagnetic radiation, said radiation shielding apparatus comprising:

shielding means comprising an elongated member having a closed-curve cross sectional shape so as to wrap completely around the antenna of the cellular telephone device, a side of the elongated member closest to a user of the cellular telephone device comprising a first material which shields the user from radiation emanating from the antenna toward the user and an other side of the elongated member comprising a second material for allowing the radiation emanating from the antenna to pass, and fixing means for disposing, fixing and maintaining the elongated member at an operable position between the antenna and the user of the cellular telephone device so that at the operable position the elongated member is effective to prevent exposure of the user to the radiation during all transmissions of electromagnetic radiation from the radiation emanating antenna.

2. A radiation shielding apparatus according to claim 1;

wherein the side of the elongated member closest to the user comprises at least one of a radiation blocking material, a radiation reflecting material and a radiation absorbing material.

3. A radiation shielding apparatus according to claim 1;

wherein the fixing means further includes means for fixing and maintaining the elongated member at only a fixed position relative to the user of the cellular telephone radio transmitting device so that at the fixed position the elongated member prevents exposure of the user to the radiation from the radiation emanating antenna.

4. A radiation shielding apparatus according to claim 1;

wherein the elongated member comprises at least two telescoping portions.

5. A method of shielding a user of a cellular telephone radio transmitting device having a radiation emanating external antenna for transmission of electromagnetic radiation, comprising the steps of:

providing an elongated member having a closed-curve cross sectional shape so as to wrap completely around the antenna of the cellular telephone device, and having a side made from a first material for blocking radiation emanating from the antenna and an other side for allowing radiation emanating from the antenna to pass to prevent exposure of the user to the radiation from the external antenna; and

disposing the elongated member between the antenna and the user so that the elongated member prevents exposure of the user to radiation during transmissions of the electromagnetic radiation from the radiation emanating antenna.

6. A method of shielding a user of a cellular telephone radio transmitting device according to claim 5;

further comprising the step of providing means for retracting the elongated member.