US20100044372A1 - Portable and collapsible chem./bio. isolators - Google Patents
Portable and collapsible chem./bio. isolators Download PDFInfo
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- US20100044372A1 US20100044372A1 US12/258,753 US25875308A US2010044372A1 US 20100044372 A1 US20100044372 A1 US 20100044372A1 US 25875308 A US25875308 A US 25875308A US 2010044372 A1 US2010044372 A1 US 2010044372A1
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- Prior art keywords
- isolator
- collapsible
- portable
- envelope
- frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J21/00—Chambers provided with manipulation devices
- B25J21/02—Glove-boxes, i.e. chambers in which manipulations are performed by the human hands in gloves built into the chamber walls; Gloves therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
- B01L1/04—Dust-free rooms or enclosures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/026—Boxes for removal of dirt, e.g. for cleaning brakes, glove- boxes
Definitions
- the present invention relates to isolators for use in containing, handling and transporting potentially hazardous radioactive, chemical or biological agents.
- hazardous radioactive, chemical and biological agents pose an increased threat. These agents may include, but are not limited to, chemical warfare agents, toxins, Risk Group 3 and Risk Group 4 biological pathogens and can also include radioactive materials.
- Isolators used to contain such agents are required by law to be airtight to prevent escape of any potentially hazardous material. Furthermore, such isolators must be fitted with negative pressure ventilation systems and high efficiency particulate air (HEPA) filters. All ports attached to the isolator must be sealable against leaks. They further require isolation of a researcher from the pathogen and decontamination of air and other effluents produced in the facility.
- HEPA high efficiency particulate air
- isolators used for containing such agents have been made of glass and stainless steel, to provide the containment requirement listed above.
- isolators are often heavy and cumbersome. Transportation of such isolators can be very difficult and they cannot generally be used in any portable capacity.
- conventional isolators require elaborate on-site assembly and decontamination before disassembly which detrimentally adds to response time and can increase public exposure to the potentially harmful substances.
- U.S. Pat. No. 5,864,767 teaches a containment system for chemical and biological explosive devices. This system is meant to contain explosive blast over-pressure and blast fragmentation particles caused by an explosive blast. However, the device is not airtight, and in fact is taught to have an open base and therefore can not isolate radioactive, biological or chemical agents from the surrounding environment.
- the present invention provides a collapsible and portable chemical and biological isolator that can be deployed in a short amount of time.
- a portable and collapsible isolator for isolating and containing radioactive, chemical or biological agents, comprising a collapsible frame, movable between a collapsed transport position and an open operational position, a flexible and collapsible envelope in the form of an airtight bag attached to the frame to define a cavity, wherein said envelope remains airtight in both collapsed and open positions, one or more sealable openings formed in the envelope for insertion and removal of the radioactive, chemical or biological agents into and out of the cavity and optionally one or more gloves extending from one or more of said sealable openings, for handling said radioactive, chemical and biological agents inside the cavity.
- a portable and collapsible isolator for containing radioactive, chemical or biological agents comprising a collapsible frame, movable between a collapsed transport position and an open operational position and a flexible and collapsible envelope in the form of an airtight bag attached to the frame to define a cavity, wherein said envelope remains airtight in both collapsed and open positions.
- One or more sealable openings are formed in the envelope for insertion and removal of the radioactive, chemical and biological agents into and out of the cavity and optionally one or more gloves extending from one or more of said sealable openings into the cavity, for handling said radioactive, chemical and biological agents inside the cavity.
- a base structure in the form of a first lockable carrying case is connected to one or more surfaces of the envelope or the frame. The base structure is movable between a collapsed, transportable position and an open, operational position.
- a portable and collapsible isolator for containing radioactive, chemical or biological agents, comprising a top structure, a table top, upon which the top structure rests and a base structure upon which the table top rests.
- the top structure comprises a collapsible frame, movable between a collapsed transport position and an open operational position and a flexible and collapsible envelope in the form of an airtight bag attached to the frame to define a cavity, wherein said envelope remains airtight in both collapsed and open positions.
- One or more sealable openings are formed in the envelope for insertion and removal of the radioactive, chemical or biological agents into and out of the cavity and optionally one or more glove extending from one or more of said sealable openings into the cavity, for handling said radioactive, chemical and biological agents inside the cavity.
- the said base structure may comprise a base frame of four telescopic legs that are extendable for operation or collapsible for transportation.
- FIG. 1 is a perspective view of one exemplary embodiment of a portable and collapsible isolator.
- FIG. 2 is a perspective view of one exemplary embodiment of a portable and collapsible isolator.
- FIG. 3 is a perspective view of one exemplary embodiment of a portable and collapsible isolator.
- radioactive, chemical and biological agents may include, but are not limited to, chemical warfare agents, toxins, Risk Group 3 and Risk Group 4 biological pathogens, as well as some radioactive materials.
- agents can include, among others, hydrogen cyanide, cyanogens chloride, phosgene, Lewisite, Mustard gas, G-series nerve agents, Ricin, VX nerve agent and radioactive iodine.
- the present isolator is capable, at least in selected embodiments, of containing particles that may be Alpha or Beta emitters.
- FIG. 1 One embodiment is shown in FIG. 1 in which there is illustrated a collapsible and portable isolator 10 comprising as the main components a collapsible frame 2 , a clear, flexible and collapsible envelope 4 in the form of an airtight bag attached to the frame to define a cavity 6 and one or more sealable openings 8 formed in the envelope 4 for insertion and removal of the radioactive, chemical or biological agents into and out of the cavity.
- one or more, and preferably two, of the sealable openings are equipped with gloves (not shown), which extend into the cavity, for handling the agents in question. Most preferably the gloves have two-piece cone shape sleeves to allow for various hand sizes to uses the device, while always maintaining containment.
- the sealable openings 8 may have bag in/bag out capabilities which are well known in the art.
- the sealable openings may be fitted with a long sleeve or tube (not shown) optionally made of the same material as the envelope 4 , so that suspicious packages can be inserted into and taken out of the isolator without jeopardizing containment.
- the sealable openings 8 are preferably sized to accommodate standard examination equipment such as, for example, light microscopes, hazardous materials HazMat® detectors and radiation detectors.
- the isolator 10 may be outfitted with or associated with an inlet and an outlet air filtration system (not shown) mechanically attached to and sealed against the flexible envelope 4 , to filter air entering and leaving the isolator.
- the inlet air filtration system comprises single or double High Efficiency Particulate Air (HEPA) filters and outlet air filtration system comprises single or double double High Efficiency Particulate Air (HEPA) filters.
- the inlet air filter is preferably protected from backflow by use of a check-valve.
- the outlet air filtration system preferably also comprises a carbon filter such as a double-carbon filter to absorb any fugitive chemical vapours. More preferably, the HEPA filters preferably have a minimum efficiency of 99.99% on particles of 0.3 ⁇ m size or greater.
- the air filtration systems are connected to a variable speed blower motor which draws clean air in through the inlet filtration system and out through the outlet filtration system and is operated in a negative pressure mode to provide a negative pressure inside the cavity. Negative pressure is preferred to ensure that, in the event of a leak in the isolator system, fresh air from outside the system will flow into the isolator, rather than potentially contaminated air flowing out to the surrounding atmosphere.
- the filtration systems are operated to create a negative pressure of ⁇ 0.2 inches of water gauge ( ⁇ 0.05 kPa), more preferably ⁇ 0.5 inches of water gauge ( ⁇ 0.125 kPa).
- the frame 2 of the isolator preferably comprises telescopic frame members that can be collapsed for transportation.
- the flexible envelope 4 can be attached to the frame in a number of known ways in the art, including but not limited to use of Velcro® loops, grommets and tabs.
- FIG. 1 illustrates the use of loops 12 made of the same material as the envelope and welded to the envelope for attaching the envelope 4 to the frame 2 .
- the envelope 4 remains attached to the frame 2 in both the collapsed and open positions.
- the envelope 4 provides a completely airtight cavity 6 in which the radioactive, chemical and biological agents are stored.
- the envelope 4 retains its air tightness in both the collapsed and open positions of the isolator, so that, size permitting, the agents in question can be stored and transported when the isolator is collapsed. Furthermore, no decontamination of the cavity of the envelope is required before collapsing and transporting the isolator.
- the envelope has no joints or breaks in the structure to help avoid leaks.
- the one or more sealable openings 8 are also airtight and any mechanical closures formed on the envelope are of a design commonly used in glove-box systems, and are airtight as well.
- the envelope 4 may be disposed of after a number of uses, and replaced with another envelope.
- the envelope 4 may be removed from the frame without compromising the integrity of the envelope, so that disposal and replacement of the envelope 4 does not expose the cavity 6 to the surrounding environment.
- the envelope 4 may be made of a clear or translucent material, or may be an opaque membrane fitted with clear windows.
- the envelope 4 is preferably at least semi-flexible and resistant to attack by radioactive, chemical and biological agents.
- the envelope material is preferably weldable to itself to ensure air tightness.
- certain multi-layer, clear, laminate barrier materials are particularly suitable for use as envelope material. For example, a lamination of nylon, ethylene-vinyl alcohol copolymer (EVOH), and polyethylene (PE) has been found to work well. Another example is a lamination of polyester, nylon, EVOH and PE.
- the nylon and EVOH serve as barriers to the radioactive, chemical or biological agents as well as to humidity and oxygen and may face the inside of the isolator cavity.
- the polyethylene serves to render the various layers of the laminate weldable to each other and also forms the outside layer of the envelope.
- Such a laminate also maintains high integrity over a range of environmental temperatures and can operate in a range of temperatures from ⁇ 15° C. to +40° C. or beyond.
- the envelope 4 can be disposable and replaced with a new envelope after a number of uses. Most preferably, the envelope is replaced after a dozen open and close cycles of the sealable openings 8 .
- Auxiliary systems of the isolator may include a monitoring system comprised of, for example, a Magnehelic® or other differential low air pressure indicator to monitor pressure inside the cavity, and/or audio and visual warning devices to indicate low or high interior pressure, and/or low battery.
- the isolator may optionally be connected to a power source, preferably both AC and DC power sources can be used.
- a battery pack may also be optionally provided as the sole power source or as an additional power source.
- FIG. 2 One further embodiment of the isolator is illustrated in FIG. 2 .
- FIG. 3 Another embodiment of the isolator is illustrated in FIG. 3 .
- the isolator is shown generally at 14 .
- the frame 2 is collapsible into and containable within a first lockable carrying case 16 for transportation or storage purposes.
- the isolator 14 has dimensions and a weight such that it can be transported by a single person.
- the isolator may weigh about 50 pounds or less (22.6 kg) and have a height of from 24′′ to 30′′ (609 to 762 mm), a length of 24′′ to 40′′ (609 to 1026 mm) and a depth of 24′′ to 30′′ (609 to 762 mm).
- the isolator 14 is preferably used for onsite containment of smaller suspicious packages or smaller amounts of materials, which can be examined on site or can be contained in the isolator even when the first lockable carrying case 16 is closed and carried to another location for further investigation.
- the case 16 is preferably made of a rigid, lightweight material optionally including one or more handles (not shown) so that it can be transported by a single person.
- the carrying case is a hard sided case.
- the walls of the carrying case may serve as a rigid bottom surface 18 and a back wall 20 to the isolator.
- the bottom surface 18 of the carrying case is preferably flat and outfitted with no-slip pads to ensure stability of the isolator if it is placed on a desk, stand or other level surface.
- foldable, telescopic legs 22 may extend from the bottom surface 18 of the carrying case 16 to allow the isolator to be self-standing and self-leveling. When the telescopic legs 22 are not used, they can be collapsed and folded into recesses (not shown) formed in the bottom surface 18 of the carrying case or detached and carried separately.
- the isolator 14 of FIG. 2 and its carrying case 16 require no disassembly, the case can simply be closed after use and transported away. No on-site decontamination is necessary since the internal cavity of the isolator is not exposed. This avoids dangerous exposure to personnel onsite and allows for rapid site decommissioning once the package has been handled.
- the blower motor and the auxiliary systems are contained in a second lockable carrying case (not shown).
- the second lockable carrying case is also preferably dimensioned to be transportable by a single person, and preferably weighs less than 50 pounds (22.6 kg).
- the isolator shown at 24 in FIG. 3 is generally larger than that shown in FIG. 2 and can be used for containment, handling and investigation of larger suspicious packages or larger amounts of materials.
- the isolator 24 shown in FIG. 3 is also designed to be compact and transportable.
- the isolator 24 comprises a top structure 26 , a table top 28 and a base structure 30 .
- the top structure 26 comprises all of the elements listed previously for the isolator 14 shown in FIG. 2 .
- the frame 2 is made of a lightweight tubing material fitted with removable end connections.
- the side portions 32 of the frame 2 are jointed to the table top 28 with pivoting joints 34 so that the side portions 32 can pivot inwards and collapse onto the table top 28 for transportation.
- the transverse members 36 of the frame 2 are removable for storage in the base structure 30 . It will be noted that the envelope 4 of the isolator remains intact during disassembly of the frame 2 and therefore any substances contained therein are never exposed to the outside environment even during collapsing and transporting the isolator.
- the base structure 30 may comprise a base frame of four telescopic legs 38 that can be extended to a comfortable work height for operation or lowered for transportation.
- the legs 38 comprise hydraulic cylinders for collapsibility.
- Casters 40 are fitted to the bottom of the base structure 30 to allow the isolator 24 to be easily transported from place to place.
- the castors 40 are preferably fitted with pivotable plates (not shown) to permit the isolator to rest on the plates and maintain stable contact with the ground during use.
- the base structure 30 may house all auxiliary systems 42 for the isolator, including the filtration system, blower motor, monitoring and electrical systems.
- the table top 28 supports the top structure 26 on the base structure 30 and is preferably made of stainless steel supporting a flat surface plate, most preferably a 1 ⁇ 2′′ thick plastic plate.
- the isolator 24 of FIG. 3 may weigh, for example, about 500 pounds (22.6 kg) with a height of from 40′′ to 65′′ (1000 to 1651 mm), a length of from 65′′ to 95′′ (1651 to 2438 mm) and a depth of from 24′′ to 65′′ (609 to 1651 mm), when deployed.
- the frame 2 and base structure 30 can simply be collapsed after use and transported with the envelope intact. No on-site decontamination is necessary since the cavity 6 of the isolator is never exposed to the atmosphere. This avoids dangerous exposure for personnel and allows for rapid site decommissioning once the package has been handled.
- the entire isolator system 24 of FIG. 3 once collapsed, can be covered by a protective cover (not shown) which latches into brackets (not shown) fitted near the bottom of the base structure 30 .
- a protective cover (not shown) which latches into brackets (not shown) fitted near the bottom of the base structure 30 .
- the isolator 24 can be rolled away by gripping handles affixed to the cover. The collapsed and covered isolator 24 can fit easily into a standard mini-van vehicle.
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Abstract
Description
- This application claims the priority right of prior U.S. patent application 60/983,717 filed Oct. 30, 2007, the disclosure of which is incorporated herein by reference.
- The present invention relates to isolators for use in containing, handling and transporting potentially hazardous radioactive, chemical or biological agents.
- On-site handling and containment of suspicious packages or known hazardous materials poses an enormous risk to both the initial responders who must contain and transport the materials and subsequent investigators who must handle the materials to determine their origin, composition, risk and eventual disposal. In particular, hazardous radioactive, chemical and biological agents pose an increased threat. These agents may include, but are not limited to, chemical warfare agents, toxins, Risk Group 3 and Risk
Group 4 biological pathogens and can also include radioactive materials. - Isolators used to contain such agents are required by law to be airtight to prevent escape of any potentially hazardous material. Furthermore, such isolators must be fitted with negative pressure ventilation systems and high efficiency particulate air (HEPA) filters. All ports attached to the isolator must be sealable against leaks. They further require isolation of a researcher from the pathogen and decontamination of air and other effluents produced in the facility.
- Traditionally, isolators used for containing such agents have been made of glass and stainless steel, to provide the containment requirement listed above. However, such isolators are often heavy and cumbersome. Transportation of such isolators can be very difficult and they cannot generally be used in any portable capacity. Furthermore, conventional isolators require elaborate on-site assembly and decontamination before disassembly which detrimentally adds to response time and can increase public exposure to the potentially harmful substances.
- U.S. Pat. Nos. 6,974,197, 6,715,343 and 6,428,122 all to Henry et al., teach portable containment systems for chemical and biological materials. However these must be assembled from numerous pieces and then later decontaminated fully before being dismantled for storage and transport. It is a challenge to conveniently transport these isolators in a fully assembled condition.
- U.S. Pat. No. 5,864,767 teaches a containment system for chemical and biological explosive devices. This system is meant to contain explosive blast over-pressure and blast fragmentation particles caused by an explosive blast. However, the device is not airtight, and in fact is taught to have an open base and therefore can not isolate radioactive, biological or chemical agents from the surrounding environment.
- The need thus remains for a device which can contain and isolate hazardous biological and chemical materials which is easier to manage and transport.
- The present invention provides a collapsible and portable chemical and biological isolator that can be deployed in a short amount of time.
- More particularly, certain exemplary embodiments provide a portable and collapsible isolator for isolating and containing radioactive, chemical or biological agents, comprising a collapsible frame, movable between a collapsed transport position and an open operational position, a flexible and collapsible envelope in the form of an airtight bag attached to the frame to define a cavity, wherein said envelope remains airtight in both collapsed and open positions, one or more sealable openings formed in the envelope for insertion and removal of the radioactive, chemical or biological agents into and out of the cavity and optionally one or more gloves extending from one or more of said sealable openings, for handling said radioactive, chemical and biological agents inside the cavity.
- Further exemplary embodiments provide a portable and collapsible isolator for containing radioactive, chemical or biological agents comprising a collapsible frame, movable between a collapsed transport position and an open operational position and a flexible and collapsible envelope in the form of an airtight bag attached to the frame to define a cavity, wherein said envelope remains airtight in both collapsed and open positions. One or more sealable openings are formed in the envelope for insertion and removal of the radioactive, chemical and biological agents into and out of the cavity and optionally one or more gloves extending from one or more of said sealable openings into the cavity, for handling said radioactive, chemical and biological agents inside the cavity. A base structure in the form of a first lockable carrying case is connected to one or more surfaces of the envelope or the frame. The base structure is movable between a collapsed, transportable position and an open, operational position.
- Further exemplary embodiments provide a portable and collapsible isolator for containing radioactive, chemical or biological agents, comprising a top structure, a table top, upon which the top structure rests and a base structure upon which the table top rests. The top structure comprises a collapsible frame, movable between a collapsed transport position and an open operational position and a flexible and collapsible envelope in the form of an airtight bag attached to the frame to define a cavity, wherein said envelope remains airtight in both collapsed and open positions. One or more sealable openings are formed in the envelope for insertion and removal of the radioactive, chemical or biological agents into and out of the cavity and optionally one or more glove extending from one or more of said sealable openings into the cavity, for handling said radioactive, chemical and biological agents inside the cavity. The said base structure may comprise a base frame of four telescopic legs that are extendable for operation or collapsible for transportation.
- Preferred embodiments of the present invention are described below, in conjunction with the accompanying figures, wherein:
-
FIG. 1 is a perspective view of one exemplary embodiment of a portable and collapsible isolator. -
FIG. 2 is a perspective view of one exemplary embodiment of a portable and collapsible isolator. -
FIG. 3 is a perspective view of one exemplary embodiment of a portable and collapsible isolator. - The present invention provides a portable and collapsible isolator for containing and handling hazardous or potentially hazardous radioactive, chemical or biological agents that may possibly pose a threat to public health and safety. For the purposes of the present disclosure, radioactive, chemical and biological agents may include, but are not limited to, chemical warfare agents, toxins, Risk Group 3 and Risk Group 4 biological pathogens, as well as some radioactive materials. Such agents can include, among others, hydrogen cyanide, cyanogens chloride, phosgene, Lewisite, Mustard gas, G-series nerve agents, Ricin, VX nerve agent and radioactive iodine. Furthermore, the present isolator is capable, at least in selected embodiments, of containing particles that may be Alpha or Beta emitters.
- One embodiment is shown in
FIG. 1 in which there is illustrated a collapsible andportable isolator 10 comprising as the main components acollapsible frame 2, a clear, flexible andcollapsible envelope 4 in the form of an airtight bag attached to the frame to define acavity 6 and one or moresealable openings 8 formed in theenvelope 4 for insertion and removal of the radioactive, chemical or biological agents into and out of the cavity. Optionally, one or more, and preferably two, of the sealable openings are equipped with gloves (not shown), which extend into the cavity, for handling the agents in question. Most preferably the gloves have two-piece cone shape sleeves to allow for various hand sizes to uses the device, while always maintaining containment. - The
sealable openings 8 may have bag in/bag out capabilities which are well known in the art. In particular the sealable openings may be fitted with a long sleeve or tube (not shown) optionally made of the same material as theenvelope 4, so that suspicious packages can be inserted into and taken out of the isolator without jeopardizing containment. Thesealable openings 8 are preferably sized to accommodate standard examination equipment such as, for example, light microscopes, hazardous materials HazMat® detectors and radiation detectors. - To meet containment requirements, the
isolator 10 may be outfitted with or associated with an inlet and an outlet air filtration system (not shown) mechanically attached to and sealed against theflexible envelope 4, to filter air entering and leaving the isolator. Preferably, the inlet air filtration system comprises single or double High Efficiency Particulate Air (HEPA) filters and outlet air filtration system comprises single or double double High Efficiency Particulate Air (HEPA) filters. The inlet air filter is preferably protected from backflow by use of a check-valve. The outlet air filtration system preferably also comprises a carbon filter such as a double-carbon filter to absorb any fugitive chemical vapours. More preferably, the HEPA filters preferably have a minimum efficiency of 99.99% on particles of 0.3 μm size or greater. - The air filtration systems are connected to a variable speed blower motor which draws clean air in through the inlet filtration system and out through the outlet filtration system and is operated in a negative pressure mode to provide a negative pressure inside the cavity. Negative pressure is preferred to ensure that, in the event of a leak in the isolator system, fresh air from outside the system will flow into the isolator, rather than potentially contaminated air flowing out to the surrounding atmosphere. Preferably, the filtration systems are operated to create a negative pressure of −0.2 inches of water gauge (−0.05 kPa), more preferably −0.5 inches of water gauge (−0.125 kPa).
- The
frame 2 of the isolator preferably comprises telescopic frame members that can be collapsed for transportation. Theflexible envelope 4 can be attached to the frame in a number of known ways in the art, including but not limited to use of Velcro® loops, grommets and tabs. As an example,FIG. 1 illustrates the use ofloops 12 made of the same material as the envelope and welded to the envelope for attaching theenvelope 4 to theframe 2. Theenvelope 4 remains attached to theframe 2 in both the collapsed and open positions. Theenvelope 4 provides a completelyairtight cavity 6 in which the radioactive, chemical and biological agents are stored. Theenvelope 4 retains its air tightness in both the collapsed and open positions of the isolator, so that, size permitting, the agents in question can be stored and transported when the isolator is collapsed. Furthermore, no decontamination of the cavity of the envelope is required before collapsing and transporting the isolator. The envelope has no joints or breaks in the structure to help avoid leaks. The one or moresealable openings 8 are also airtight and any mechanical closures formed on the envelope are of a design commonly used in glove-box systems, and are airtight as well. - Optionally, the
envelope 4 may be disposed of after a number of uses, and replaced with another envelope. In a further preferred embodiment, theenvelope 4 may be removed from the frame without compromising the integrity of the envelope, so that disposal and replacement of theenvelope 4 does not expose thecavity 6 to the surrounding environment. - The
envelope 4 may be made of a clear or translucent material, or may be an opaque membrane fitted with clear windows. Theenvelope 4 is preferably at least semi-flexible and resistant to attack by radioactive, chemical and biological agents. The envelope material is preferably weldable to itself to ensure air tightness. Through extensive testing and investigation, the present inventors have found that certain multi-layer, clear, laminate barrier materials are particularly suitable for use as envelope material. For example, a lamination of nylon, ethylene-vinyl alcohol copolymer (EVOH), and polyethylene (PE) has been found to work well. Another example is a lamination of polyester, nylon, EVOH and PE. In these laminates, the nylon and EVOH serve as barriers to the radioactive, chemical or biological agents as well as to humidity and oxygen and may face the inside of the isolator cavity. The polyethylene serves to render the various layers of the laminate weldable to each other and also forms the outside layer of the envelope. Such a laminate also maintains high integrity over a range of environmental temperatures and can operate in a range of temperatures from −15° C. to +40° C. or beyond. As indicated above, theenvelope 4 can be disposable and replaced with a new envelope after a number of uses. Most preferably, the envelope is replaced after a dozen open and close cycles of thesealable openings 8. - Auxiliary systems of the isolator, if present, may include a monitoring system comprised of, for example, a Magnehelic® or other differential low air pressure indicator to monitor pressure inside the cavity, and/or audio and visual warning devices to indicate low or high interior pressure, and/or low battery. Furthermore, the isolator may optionally be connected to a power source, preferably both AC and DC power sources can be used. A battery pack may also be optionally provided as the sole power source or as an additional power source.
- Further embodiments of the present invention are disclosed herein to serve different requirements for portability and use. One further embodiment of the isolator is illustrated in
FIG. 2 . Another embodiment of the isolator is illustrated inFIG. 3 . - With reference to
FIG. 2 , the isolator is shown generally at 14. Theframe 2 is collapsible into and containable within a first lockable carryingcase 16 for transportation or storage purposes. In this embodiment, theisolator 14 has dimensions and a weight such that it can be transported by a single person. For example, the isolator may weigh about 50 pounds or less (22.6 kg) and have a height of from 24″ to 30″ (609 to 762 mm), a length of 24″ to 40″ (609 to 1026 mm) and a depth of 24″ to 30″ (609 to 762 mm). In this first preferred embodiment, theisolator 14 is preferably used for onsite containment of smaller suspicious packages or smaller amounts of materials, which can be examined on site or can be contained in the isolator even when the firstlockable carrying case 16 is closed and carried to another location for further investigation. - The
case 16 is preferably made of a rigid, lightweight material optionally including one or more handles (not shown) so that it can be transported by a single person. Most preferably, the carrying case is a hard sided case. When the isolator is in the open, operating position, the walls of the carrying case may serve as arigid bottom surface 18 and aback wall 20 to the isolator. Thebottom surface 18 of the carrying case is preferably flat and outfitted with no-slip pads to ensure stability of the isolator if it is placed on a desk, stand or other level surface. Alternatively, foldable,telescopic legs 22 may extend from thebottom surface 18 of the carryingcase 16 to allow the isolator to be self-standing and self-leveling. When thetelescopic legs 22 are not used, they can be collapsed and folded into recesses (not shown) formed in thebottom surface 18 of the carrying case or detached and carried separately. - Since the
isolator 14 ofFIG. 2 and its carryingcase 16 require no disassembly, the case can simply be closed after use and transported away. No on-site decontamination is necessary since the internal cavity of the isolator is not exposed. This avoids dangerous exposure to personnel onsite and allows for rapid site decommissioning once the package has been handled. - Preferably, the blower motor and the auxiliary systems are contained in a second lockable carrying case (not shown). The second lockable carrying case is also preferably dimensioned to be transportable by a single person, and preferably weighs less than 50 pounds (22.6 kg).
- The isolator shown at 24 in
FIG. 3 , is generally larger than that shown inFIG. 2 and can be used for containment, handling and investigation of larger suspicious packages or larger amounts of materials. Theisolator 24 shown inFIG. 3 is also designed to be compact and transportable. Theisolator 24 comprises atop structure 26, atable top 28 and abase structure 30. Thetop structure 26 comprises all of the elements listed previously for theisolator 14 shown inFIG. 2 . Theframe 2 is made of a lightweight tubing material fitted with removable end connections. Theside portions 32 of theframe 2 are jointed to thetable top 28 with pivotingjoints 34 so that theside portions 32 can pivot inwards and collapse onto thetable top 28 for transportation. Thetransverse members 36 of theframe 2 are removable for storage in thebase structure 30. It will be noted that theenvelope 4 of the isolator remains intact during disassembly of theframe 2 and therefore any substances contained therein are never exposed to the outside environment even during collapsing and transporting the isolator. - The
base structure 30 may comprise a base frame of fourtelescopic legs 38 that can be extended to a comfortable work height for operation or lowered for transportation. Alternatively, thelegs 38 comprise hydraulic cylinders for collapsibility.Casters 40 are fitted to the bottom of thebase structure 30 to allow theisolator 24 to be easily transported from place to place. Thecastors 40 are preferably fitted with pivotable plates (not shown) to permit the isolator to rest on the plates and maintain stable contact with the ground during use. - The
base structure 30 may house allauxiliary systems 42 for the isolator, including the filtration system, blower motor, monitoring and electrical systems. - The
table top 28 supports thetop structure 26 on thebase structure 30 and is preferably made of stainless steel supporting a flat surface plate, most preferably a ½″ thick plastic plate. - The
isolator 24 ofFIG. 3 may weigh, for example, about 500 pounds (22.6 kg) with a height of from 40″ to 65″ (1000 to 1651 mm), a length of from 65″ to 95″ (1651 to 2438 mm) and a depth of from 24″ to 65″ (609 to 1651 mm), when deployed. - Since collapsing the
isolator 24 ofFIG. 3 does not require disassembly of theenvelope 4 in any way, theframe 2 andbase structure 30 can simply be collapsed after use and transported with the envelope intact. No on-site decontamination is necessary since thecavity 6 of the isolator is never exposed to the atmosphere. This avoids dangerous exposure for personnel and allows for rapid site decommissioning once the package has been handled. - The
entire isolator system 24 ofFIG. 3 , once collapsed, can be covered by a protective cover (not shown) which latches into brackets (not shown) fitted near the bottom of thebase structure 30. Once collapsed and covered, theisolator 24 can be rolled away by gripping handles affixed to the cover. The collapsed and coveredisolator 24 can fit easily into a standard mini-van vehicle. - This detailed description of the apparatus and processes of the present invention is used to illustrate the prime embodiments of the present invention. It will be apparent to those skilled in the art that various modifications can be made in the present devices and that various alternative embodiments can be utilized. Therefore, it will be recognized that modifications can be made in the present invention without departing from the scope of the invention, which is limited only by the appended claims.
Claims (36)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/258,753 US20100044372A1 (en) | 2007-10-30 | 2008-10-27 | Portable and collapsible chem./bio. isolators |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US98371707P | 2007-10-30 | 2007-10-30 | |
US12/258,753 US20100044372A1 (en) | 2007-10-30 | 2008-10-27 | Portable and collapsible chem./bio. isolators |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100044372A1 true US20100044372A1 (en) | 2010-02-25 |
Family
ID=40589936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/258,753 Abandoned US20100044372A1 (en) | 2007-10-30 | 2008-10-27 | Portable and collapsible chem./bio. isolators |
Country Status (2)
Country | Link |
---|---|
US (1) | US20100044372A1 (en) |
CA (1) | CA2642162A1 (en) |
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