Patents by Inventor Leonello Carrettin
Leonello Carrettin 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: 8372255Abstract: The invention relates to a current collector for electrochemical diaphragm or membrane-type cells, comprising a layer obtained by interlacing or weaving of a multiplicity of first sets of metal wires with a multiplicity of single metal wires or of second sets of metal wires and provided with substantially parallel corrugations. Such layer is coupled to a planar element consisting of a cloth or a flattened stocking formed by weaving of a single metal wire. The current collector is characterised by a low angular coefficient of the pressure/thickness ratio over a wide range of compression levels.Type: GrantFiled: July 8, 2008Date of Patent: February 12, 2013Assignee: Uhdenora S.p.A.Inventors: Michele Perego, Leonello Carrettin, Dario Oldani, Angelo Ottaviani
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Patent number: 7842172Abstract: It is described a bipolar plate consisting of a single wall and a perimetrical sealing frame obtained by folding and provided with a planar abutment surface for the frame-to-wall welding. The wall is further provided with projections on one face thereof preferably obtained by moulding, and with supports on the other face consisting of sheet strips housed in the recesses formed by the concave part of the projections. The projections substantially extend along the entire length of the bipolar plate. The projections and supports are connected to electrodes or current distributors. The projections, the supports, the single wall and the perimetrical frame are made of the same metal or alloy. The electrode or current distributor supported by the projections, the same projections and the supports are welded together by a single pass of arc-welding or preferably laser-welding.Type: GrantFiled: November 18, 2005Date of Patent: November 30, 2010Assignee: Uhdenora S.p.A.Inventors: Fulvio Federico, Leonello Carrettin, Dario Oldani, Corrado Mojana
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Publication number: 20100108537Abstract: The invention relates to a current collector for electrochemical diaphragm or membrane-type cells, comprising a layer obtained by interlacing or weaving of a multiplicity of first sets of metal wires with a multiplicity of single metal wires or of second sets of metal wires and provided with substantially parallel corrugations. Such layer is coupled to a planar element consisting of a cloth or a flattened stocking formed by weaving of a single metal wire. The current collector is characterised by a low angular coefficient of the pressure/thickness ratio over a wide range of compression levels.Type: ApplicationFiled: July 8, 2008Publication date: May 6, 2010Applicant: UKHDENORA S.P.A.Inventors: Michele Perego, Leonello Carrettin, Dario Oldani, Angelo Ottaviani
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Publication number: 20100059389Abstract: The invention relates to an electrode for membrane electrolysis cells comprising a grooved metal support favouring the gas release and the electrolyte renewal on its surface. The grooved geometry of the support may be obtained by erosion of a metal sheet with abrasive media in a continuous process.Type: ApplicationFiled: November 13, 2009Publication date: March 11, 2010Applicant: Industrie De Nora S.p.A.Inventors: Angelo Ottaviani, Leonello Carrettin, Dino Floriano Di Franco, Corrado Mojana, Michele Perego
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Publication number: 20090050472Abstract: An electrolysis cell comprising an anodic compartment and a cathodic compartment separated by an ion-exchange membrane, at least one of said compartments equipped with a gas-diffusion electrode having two major surfaces, the first major surface of said gas-diffusion electrode facing the membrane and being in contact with a planar porous element to be traversed by an electrode flow, the second major surface of said gas-diffusion electrode being in contact with a current distributor comprising a multiplicity of elastic conductive protrusions for compressing said gas-diffusion electrode against said planar porous element.Type: ApplicationFiled: January 15, 2007Publication date: February 26, 2009Applicant: UHDENORA S.p.A.Inventors: Fulvio Federico, Peter Woltering, Leonello Carrettin, Dario Oldani
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Patent number: 7494579Abstract: It is herein described an electrowinning cell with a spouted bed electrode of growing metallic beads, separated by a semi-permeable diaphragm and suitable for being assembled in a stack in a modular arrangement.Type: GrantFiled: July 11, 2003Date of Patent: February 24, 2009Assignee: De Nora Elettrodi S.p.A.Inventors: Douglas J. Robinson, Stacey A. MacDonald, Vladimir Jiricny, Dario Oldani, Francesco Todaro, Leonello Carrettin, Gian Nicola Martelli, Davide Scotti
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Publication number: 20080105540Abstract: It is described a bipolar plate consisting of a single wall and a perimetrical sealing frame obtained by folding and provided with a planar abutment surface for the frame-to-wall welding. The wall is further provided with projections on one face thereof preferably obtained by moulding, and with supports on the other face consisting of sheet strips housed in the recesses formed by the concave part of the projections. The projections substantially extend along the entire length of the bipolar plate. The projections and supports are connected to electrodes or current distributors. The projections, the supports, the single wall and the perimetrical frame are made of the same metal or alloy. The electrode or current distributor supported by the projections, the same projections and the supports are welded together by a single pass of arc-welding or preferably laser-welding.Type: ApplicationFiled: November 18, 2005Publication date: May 8, 2008Inventors: Fulvio Federico, Leonello Carrettin, Dario Oldani, Corrado Mojana
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Publication number: 20070144898Abstract: It is described a finite interelectrodic gap-cell for oxygen evolving-electrochemical processes comprising a package of planar anodes secured to a rack and a package of planar cathodes intercalated to the anodes secured to a frame. The cathode package can be handled separately or jointly with the anode package by means of a lifting device. The cell is particularly useful in metal electrowinning processes and in softening processes of calcareous waters by microelectrolysis.Type: ApplicationFiled: March 2, 2005Publication date: June 28, 2007Inventors: Dario Oldani, Giorgio Minoia, Leonello Carrettin, Paolo Rossi
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Publication number: 20060124452Abstract: It is herein described an electrowinning cell with a spouted bed electrode of growing metallic beads, separated by a semi-permeable diaphragm and suitable for being assembled in a stack in a modular arrangement.Type: ApplicationFiled: July 11, 2003Publication date: June 15, 2006Inventors: Douglas Robinson, Stacey MacDonald, Vladimir Jiricny, Dario Oldani, Francesco Todaro, Leonello Carrettin, Gian Martelli, Davide Scotti
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Publication number: 20060070873Abstract: An adjustable elastic element (19) for forcing the surfaces of expandable-type anodes for diaphragm chlor-alkali cells wherein such element consists of a U-shaped elastic sheet provided with at least one adjusting mechanism comprising both one collar (29) which fastens the elastic sheet through openings obtained in the sheet itself and one gear (23) connectable to a removable external tool consisting of a handle and a shaft whereby turning the tool, a rotation of the gears is produced, in its turn acting on the collar controlling the span of the anode surfaces. And the span is freely adjustable in order to establish a predetermined controlled gap between anode and finger-supported diaphragm surfaces, or alternatively to bring such surfaces in contact without introducing however a useless and hazardous compression.Type: ApplicationFiled: January 21, 2004Publication date: April 6, 2006Inventors: Dario Oldani, Salvatore Peragine, Leonello Carrettin, David Francis
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Patent number: 6998030Abstract: A bipolar assembly for filter-press type electrolyzers is described comprising a single sheet, whose two faces work respectively as anodic and cathodic wall, characterised by a design of perimetral flanges which greatly simplifies its construction enhancing its reliability. The peripheral flanges are made of a first flange obtained by folding the peripheral portion of the single sheet and of a second flange formed by a rod or a tube with quadrangular section or, alternatively, the first and second flange are pre-formed by folding of adequate strips subsequently fixed to the single sheet. The electrolyser resulting from the assemblage of a multiplicity of assemblies of the invention is particularly suited to the process of electrolysis of hydrochloric acid solutions carried out with chlorine-evolving anodes and oxygen-consuming cathodes.Type: GrantFiled: February 28, 2002Date of Patent: February 14, 2006Assignee: Uhdenora Technologies S.r.l.Inventors: Dario Oldani, Peter Fabian, Fulvio Federico, Antonius Fischer, Leonello Carrettin
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Publication number: 20040216994Abstract: A bipolar assembly for filter-press type electrolysers is described comprising a single sheet, whose two faces work respectively as anodic and cathodic wall, characterised by a design of perimetral flanges which greatly simplifies its construction enhancing its reliability. The peripheral flanges are made of a first flange obtained by folding the peripheral portion of the single sheet and of a second flange formed by a rod or a tube with quadrangular section or, alternatively, the first and second flange are pre-formed by folding of adequate strips subsequently fixed to the single sheet. The electrolyser resulting from the assemblage of a multiplicity of assemblies of the invention is particularly suited to the process of electrolysis of hydrochloric acid solutions carried out with chlorine-evolving anodes and oxygen-consuming cathodes.Type: ApplicationFiled: July 16, 2003Publication date: November 4, 2004Inventors: Dario Oldani, Peter Fabian, Fulvio Federico, Antonius Fischer, Leonello Carrettin