# US 7,705,335 B2 · Security protection device and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,705,335 B2 - Document ID: US7705335B2 - Status: Granted - Kind: B2 - Application number: 12/075,827 - Filed: 2008-03-14 - Published: 2009-09-10 - Granted: 2010-04-27 - Earliest claimed: 2007-03-16 - Assignees: PartTec, Ltd. - Inventors: Herschel Ellis Workman; Cai Lin Wang; Dorina Magdalena Chipara; Craig R. Kline - Web page: https://patentgrep.com/patent/US7705335B2 ## CPC - G21F 7/00: Shielded cells or rooms - E05B 37/00: Permutation {or combination} locks ({handles with combination locks E05B13/103; keyhole guards with combination locks E05B17/145;} electric permutation locks E05B49/00); Puzzle locks - Y10T 70/7418: Dials - Y10T 70/7424: Tampering prevention or attach defeating - Y10T 70/7915: Tampering prevention or attack defeating - G21F: PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means A61K8/00, A61Q17/04; in cosmonautic vehicles B64G1/54; combined with a reactor G21C11/00; combined with X-ray tubes H01J35/16; combined with X-ray apparatus H05G1/02) - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A method, device and retrofitting kit is disclosed that will protect materials that are housed within a storage device from one or more forms of radiographic imaging. A target subject is at least partially covered with a first and second layer of radiographic cloaking material. The first layer of radiographic cloaking material is configured to defeat a first type of radiographic beam, such as a photon beam. The second layer of radiographic cloaking material is configured to defeat a second type of radiographic beam, such as a particle beam. ## Claims ### Claim 1 A storage device, comprising: a housing defining an interior storage compartment; a lock installed on said housing for preventing unauthorized access to said interior storage compartment; and a radiographic cloaking barrier having at least two layers of cloaking material covering at least a portion of a front surface and a back surface of a locking mechanism of said lock. ### Claim 2 (depends on 1) The storage device of claim 1, where said radiographic cloaking barrier comprises at least in part a material having a high atomic number. ### Claim 3 (depends on 1) The storage device of claim 1, where said first layer of cloaking material comprises material configured to defeat a first type of radiographic beam and said second layer of cloaking material is configured to defeat a second type of radiographic beam. ### Claim 4 (depends on 3) The storage device of claim 3, where said first layer of cloaking material is configured to absorb neutrons from a particle beam generator. ### Claim 5 (depends on 4) The storage device of claim 4, where said first layer of cloaking material comprises a material having a high concentration of hydrogen and boron. ### Claim 6 (depends on 3) The storage device of claim 3, where said second layer of cloaking material is configured to attenuate gamma radiation from a photon beam generator. ### Claim 7 (depends on 6) The storage device of claim 6, where said second layer of cloaking material has a high concentration of tungsten atoms. ### Claim 8 (depends on 3) The storage device of claim 3, where said second layer of cloaking material is configured to attenuate X-ray radiation from an X-ray beam generator. ### Claim 9 (depends on 1) The storage device of claim 1, where one of said layers of said radiographic cloaking barrier comprises shards of tungsten embedded within a suitable carrier. ### Claim 10 (depends on 1) The storage device of claim 1, further comprising a third layer of cloaking material covering at least a portion of said front surface and said back surface of said locking mechanism. ### Claim 11 (depends on 1) The storage device of claim 1, where one of said layers of said radiographic cloaking barrier comprises a first set of radiographic cloaking rods. ### Claim 12 (depends on 11) The storage device of claim 11, where said radiographic cloaking rods may be selected from a group of radiographic cloaking rods comprising tungsten rods or lead rods. ### Claim 13 (depends on 11) The storage device of claim 11, where said layer of said radiographic cloaking barrier includes a second set of radiographic cloaking rods arranged to have a different angular orientation than said first set of radiographic cloaking rods. ### Claim 14 (depends on 1) The storage device of claim 1, where said interior storage compartment is surrounded by at least one layer of radiographic cloaking material. ### Claim 15 A method of protecting a storage device from radiographic imaging, comprising: covering a portion of a front surface and a back surface of a locking mechanism with a first layer of radiographic cloaking material configured to defeat a first type of radiographic beam; and covering said portion of said front and back surfaces of said locking mechanism with a second layer of radiographic cloaking material configured to defeat a second type of radiographic beam. ### Claim 16 (depends on 15) The method of claim 15, where said first layer of radiographic cloaking material comprises a neutron absorbing material. ### Claim 17 (depends on 15) The method of claim 15, where said first layer of radiographic cloaking material comprises a layer of photon beam attenuating material. ### Claim 18 (depends on 15) The method of claim 15, where said first layer of radiographic cloaking material comprises a flexible silicon-based material containing a neutron absorbing material. ### Claim 19 (depends on 15) The method of claim 15, where said first layer of radiographic cloaking material comprises a neutron absorbing material and said second layer of radiographic cloaking material comprises a photon attenuating material. ### Claim 20 (depends on 19) The method of claim 19, where said neutron absorbing material comprises a material composed of a high concentration of hydrogen and said second layer of radiographic cloaking material comprises a material composed of a high concentration of tungsten atoms. ### Claim 21 (depends on 15) The method of claim 15, where said first layer of cloaking material comprises shards of tungsten within a suitable carrier. ### Claim 22 (depends on 15) The method of claim 15, where said first layer of cloaking material comprises a material configured to cause beam scattering. ### Claim 23 A kit for retrofitting a storage device having a lock, comprising: a first radiographic cloaking barrier configured to be attached to a front surface of a locking mechanism of said lock such that said locking mechanism is at least partially cloaked from radiographic imaging; and a second radiographic cloaking barrier configured to be attached to a back surface of said locking mechanism of said lock such that said locking mechanism is at least partially cloaked from radiographic imaging. ### Claim 24 (depends on 23) The kit of claim 23, further comprising a third radiographic cloaking member configured to be attached an upper side surface of said locking mechanism of said lock such that said locking mechanism is at least partially cloaked from radiographic imaging. ### Claim 25 (depends on 24) The kit of claim 24, further comprising a fourth radiographic cloaking member configured to be attached a lower surface of said locking mechanism of said lock such that said locking mechanism is partially cloaked from radiographic imaging. ### Claim 26 (depends on 25) The kit of claim 25, further comprising a fifth radiographic cloaking member configured to be attached a left side surface of said locking mechanism of said lock such that said locking mechanism is partially cloaked from radiographic imaging. ### Claim 27 (depends on 26) The kit of claim 26, further comprising a sixth radiographic cloaking member configured to be attached a right side surface of said locking mechanism of said lock such that said locking mechanism is partially cloaked from radiographic imaging. ### Claim 28 (depends on 23) The kit of claim 23, where said first and second radiographic cloaking barriers comprise flex boron in polymer with tungsten chips. ### Claim 29 (depends on 23) The kit of claim 23, where said first and second radiographic cloaking barriers comprise lead balls suspended in a suitable medium. ### Claim 30 (depends on 23) The kit of claim 23, where said first and second radiographic cloaking barriers include a plurality of tungsten rods covered with an epoxy. ### Claim 31 (depends on 23) The kit of claim 23, where said first and second radiographic cloaking barriers comprise a first set of tungsten rods having a first predetermined orientation and a second set of tungsten rods having a second predetermined orientation in relation to said first set of tungsten rods. ### Claim 32 (depends on 23) The kit of claim 23, where said first and second radiographic cloaking members comprise housings filled with a fluid. ### Claim 33 A storage device, comprising: a housing defining an interior storage compartment; and a radiographic cloaking barrier having at least two layers of cloaking material covering at least a portion of the interior storage compartment.