Patents by Inventor Charles R. Blackwood
Charles R. Blackwood has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7938597Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart tubular support members projecting therefrom. The tubular support members are tapered so that the tubular support members are nestable with the tubular support members of an identical drain structure panel when the drain structure panels are stacked.Type: GrantFiled: March 11, 2009Date of Patent: May 10, 2011Assignee: Airfield Systems, L.L.C.Inventor: Charles R. Blackwood
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Patent number: 7815395Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels that include a plurality of spaced apart tubular support members arranged to define a unit having a plurality of side edges, the tubular support members having a first end, a second end, and a sidewall extending there between. The drain structure panels further include at least one strut extending from each support member to another support member to latterly support the tubular support members. An anchor plate is positioned between at least two tubular support members. The anchor plate has an aperture formed there through sized and configured to receive a ground anchoring member for securing the drain structure panel to a ground surface.Type: GrantFiled: April 8, 2009Date of Patent: October 19, 2010Assignee: Airfield Systems, L.L.CInventor: Charles R. Blackwood
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Publication number: 20100260546Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels that include a plurality of spaced apart tubular support members arranged to define a unit having a plurality of side edges, the tubular support members having a first end, a second end, and a sidewall extending there between. The drain structure panels further include at least one strut extending from each support member to another support member to latterly support the tubular support members. An anchor plate is positioned between at least two tubular support members. The anchor plate has an aperture formed there through sized and configured to receive a ground anchoring member for securing the drain structure panel to a ground surface.Type: ApplicationFiled: April 8, 2009Publication date: October 14, 2010Inventor: Charles R. Blackwood
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Patent number: 7578635Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart tubular support members projecting therefrom. The tubular support members are tapered so that the tubular support members are nestable with the tubular support members of an identical drain structure panel when the drain structure panels are stacked.Type: GrantFiled: October 23, 2007Date of Patent: August 25, 2009Assignee: Airfield Systems, L.L.C.Inventor: Charles R. Blackwood
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Publication number: 20090169303Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart tubular support members projecting therefrom. The tubular support members are tapered so that the tubular support members are nestable with the tubular support members of an identical drain structure panel when the drain structure panels are stacked.Type: ApplicationFiled: March 11, 2009Publication date: July 2, 2009Inventor: Charles R. Blackwood
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Patent number: 7503726Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart tubular support members projecting therefrom. The tubular support members have at least one fluid flow opening formed through a sidewall so as to intersect a second end of the tubular support members at two rounded corners. The tubular support members are tapered so that the tubular support members are nestable with the tubular support members of an identical drain structure panel when the drain structure panels are stacked.Type: GrantFiled: November 6, 2007Date of Patent: March 17, 2009Assignee: Airfield Systems, LLCInventor: Charles R. Blackwood
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Patent number: 7341401Abstract: A subsurface drainage assembly for directing fluid drainage from a surface. The subsurface drainage assembly includes a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart support members projecting therefrom. The support members have at least one fluid flow opening formed through a sidewall so as to intersect a lower end of the support members at two rounded corners. The support members are spaced so that the support members are nestable between the support members of an identical drain structure panel when the drain structure panels are arranged in an inverted relationship with respect to one another. The drain structure panel may be placed on an impermeable liner having an upper surface with a plurality of ridges defining troughs therebetween.Type: GrantFiled: August 14, 2006Date of Patent: March 11, 2008Assignee: Airfield Systems, LLCInventor: Charles R. Blackwood
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Publication number: 20070284302Abstract: A composite filter material comprising a filter layer and a support layer bonded together. The filter layer is formed of a flexible, liquid-permeable non-woven fabric having a plurality of openings sized to permit liquids and silt particles to pass through the filter layer while preventing sand particles from passing through the filter layer. The support layer is formed of a flexible, liquid-permeable material having a grab tensile strength greater than that of the filter layer, the support layer having a plurality of openings such that the support material is at least as permeable to liquids as the filter fabric. In another embodiment, the composite filter material further comprises a drainage panel bonded to at least one of the filter layer or the support layer. The drainage panel has a laterally-extensive backing grid and a plurality of spaced-apart support members projecting from the backing grid whereby fluid may flow through the backing grid and between the support members.Type: ApplicationFiled: June 7, 2007Publication date: December 13, 2007Inventor: Charles R. Blackwood
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Patent number: 7290958Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart tubular support members projecting therefrom. The tubular support members have at least one fluid flow opening formed through a sidewall so as to intersect a second end of the tubular support members at two rounded corners. The tubular support members are tapered so that the tubular support members are nestable with the tubular support members of an identical drain structure panel when the drain structure panels are stacked.Type: GrantFiled: August 31, 2005Date of Patent: November 6, 2007Assignee: Airfield Systems, LLCInventor: Charles R. Blackwood
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Patent number: 7201538Abstract: A subsurface drainage assembly for directing fluid drainage from a surface is disclosed. The subsurface drainage assembly includes a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart tubular support members projecting therefrom.Type: GrantFiled: August 31, 2005Date of Patent: April 10, 2007Assignee: Airfield Systems, L.L.C.Inventors: Charles R. Blackwood, James M. Courter
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Patent number: 7108454Abstract: A subsurface drainage assembly for directing fluid drainage from a surface including a plurality of drain structure panels linked together in a manner that permits movement of one drain structure panel relative to the adjacent drain structure panel. The drain structure panels have a laterally extensive backing grid and a plurality of spaced apart support members projecting therefrom. The support members have at least one fluid flow opening formed through a sidewall so as to intersect a lower end of the support members at two rounded corners. The support members are spaced so that the support members are nestable between the support members of an identical drain structure panel when the drain structure panels are arranged in an inverted relationship with respect to one another. The drain structure panel may be placed on an impermeable liner having an upper surface with a plurality of ridges defining troughs therebetween.Type: GrantFiled: October 12, 2004Date of Patent: September 19, 2006Assignee: Airfield Systems, L.L.C.Inventor: Charles R. Blackwood