Patents by Inventor Leonardo Tognarelli

Leonardo Tognarelli 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).

  • Patent number: 10184464
    Abstract: A compressor includes a piston disposed in a housing and configured to be reciprocatably driven in the housing by an electromagnetic drive. A conventional linear motor drive assembly reciprocatably drives the piston in an embodiment. A magnetically-geared drive assembly reciprocatably drives the piston in another embodiment. A solenoid drive assembly reciprocatably drives the piston in another embodiment. A control system is coupled to the drive for varying piston displacement, and an accumulator conserves force by decelerating a translating assembly at the end of one stroke and accelerating the assembly in a subsequent stroke.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: January 22, 2019
    Assignee: NUOVO PIGNONE SRL
    Inventors: Riccardo Bagagli, Leonardo Tognarelli, Massimo Bargiacchi, Alessio Capanni
  • Publication number: 20180361479
    Abstract: A method for manufacturing a component of a rotating machine comprises the steps of forming a structural inner portion by additive manufacturing from a first material; covering the structural inner portion with a protective outer portion made of a second material; the first material has a melting point higher than a second material.
    Type: Application
    Filed: December 1, 2016
    Publication date: December 20, 2018
    Inventors: Pierluigi TOZZI, Massimo GIANNOZZI, Iacopo GIOVANNETTI, Leonardo Tognarelli, Antonella DIMATTEO
  • Patent number: 10030638
    Abstract: A compressor including a pair of opposed pistons disposed in a housing and defining a compression chamber. An electromagnetic actuator reciprocatedly drives the pistons within the housing in cooperation with force accumulator. The force accumulators bank the force during a first reciprocation, decelerating the pistons, and apply the force in a subsequent reciprocation, thereby accelerating the pistons.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: July 24, 2018
    Assignee: Nuovo Pignone Srl
    Inventors: Riccardo Bagagli, Leonardo Tognarelli
  • Publication number: 20180135680
    Abstract: A method for assembling equipment on a support of a turbo-machine. The method comprises the step of mechanically assembling the equipment to a part of the support by means of a fastening device and a further step consisting of providing a coating layer of resin at the interface between the fastening device and the support part. The coating layer allows to perfectly seal the interface between the fastening device and the support part thus avoiding the oxidation of the internal surface without painting.
    Type: Application
    Filed: May 25, 2016
    Publication date: May 17, 2018
    Inventors: Fabio FORNACIARI, Leonardo TOGNARELLI, Alessandro PACCIANI, Mario BIGI
  • Patent number: 9874286
    Abstract: Disclosed is a differential pressure valve comprising: a valve body, the valve body having at least one flow inlet and one flow outlet: at least one shutter, the shutter being movable between an open position and a closed position under a differential pressure across the valve; at least one flow passage from the flow inlet to the flow outlet; at least one biasing member configured to bias the shutter towards a closed position so as to block the flow passage through the flow inlet. The biasing member is a non-linear biasing member.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: January 23, 2018
    Inventors: Riccardo Bagagli, Leonardo Tognarelli, Carmelo Maggi, Alberto Babbini
  • Publication number: 20180010691
    Abstract: A packing case for a plunger or a piston rod of a reciprocating machine comprises packing cups, each packing cup comprising a body with a hole for the passage of the plunger or rod and a sealing ring seat for housing a sealing ring which slidably bear against the plunger or rod. Packing cups are aligned with each other in series. The packing case comprises lube oil ducts for supplying lube oil from an end of the packing case to the sealing ring seat. Each packing cup comprises sectors, each sector comprising at least lube oil duct portions. The packing cups are positionable to bring, one sector at a time in an activation position where some of the lube oil duct portions of the sector are connected with the lube oil duct portions of an adjacent packing cup to form lube oil ducts. The packing cups are lockable.
    Type: Application
    Filed: November 27, 2015
    Publication date: January 11, 2018
    Applicant: Nuovo Pignone Srl
    Inventors: Carmelo MAGGI, Jan Pawel WOJNAR, Michele SANESI, Leonardo TOGNARELLI
  • Publication number: 20170350406
    Abstract: A stabilizing arrangement for a rotating shaft including a shaft being arranged substantially vertically in a machine so as to rotate during machine operation, first pressure delivery system for delivering a fluid pressure, in particular of a fluid circulating inside the machine, at a first location of the machine. First location is close to the shaft and part of first pressure delivery system is arranged at first location so as to exert a lateral pulling or pushing action on the shaft.
    Type: Application
    Filed: November 26, 2015
    Publication date: December 7, 2017
    Inventors: Andrea MASSINI, Leonardo TOGNARELLI, Carlo Maria MARTINI
  • Publication number: 20170350380
    Abstract: Fluid flow adapter for a cylinder of a reciprocating compressor, the cylinder having a side wall provided with a valve seat, the fluid flow adapter comprising a filler element having an internal surface facing an internal volume of the cylinder and an external surface facing the valve, the filler element having at least a channel connecting the internal surface to the external surface, wherein the internal surface is flush with the side wall of the cylinder, the channel being configured to allow the passage of fluid between the internal volume of the cylinder and the valve.
    Type: Application
    Filed: November 24, 2015
    Publication date: December 7, 2017
    Inventors: Riccardo Bagagli, Leonardo Tognarelli, Alberto Babbini, Massimo Bargiacchi, Guido Pratelli, Federico Puccinelli, Riccardo Maleci
  • Publication number: 20170328237
    Abstract: A sector for the assembly of a stage of a turbine comprises a central and a peripheral portion; a plurality of blades attached between the central and the peripheral portions; a first and a second side opposite to each other, the first side is configured to join with the second side of another sector, the first side is provided with a first connecting portion and the second side is provided with a second connecting portion configured to mate with a first connecting portion of a first side of another sector.
    Type: Application
    Filed: October 30, 2015
    Publication date: November 16, 2017
    Applicant: Nuovo Pignone SRL
    Inventors: Giacomo BENCINI, Fabio FORNACIARI, Leonardo TOGNARELLI, Pierluigi TOZZI
  • Patent number: 9810230
    Abstract: An impeller for a turbo-machine is provided. The impeller includes a metallic base having a back surface and a front surface opposite to the back surface; at least one blade extending on the front surface of the metallic base; a composite shroud attached to the at least one blade such that plural closed paths are formed by the front surface of the metallic base, the at least one blade and the composite shroud; and a connector configured to attach the composite shroud to the metallic base or the at least one blade.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 7, 2017
    Inventors: Iacopo Giovannetti, Massimo Giannozzi, Dino Bianchi, Leonardo Tognarelli, Manuele Bigi, Andrea Massini
  • Patent number: 9790932
    Abstract: An actuated rotary valves for reciprocating compressors used in oil and gas industry, the valve including a stator with a stator opening, a rotor with a rotor opening, and an actuation mechanism. The actuation mechanism is configured to receive a rotation motion and to actuate the rotor to perform first an axial translation moving away from the stator and then a rotation. The actuation mechanism includes an outer shaft configured to receive the rotation motion, and an inner shaft inside the outer shaft and configured to rotate the rotor. The outer shaft is configured to rotate a predetermined angular displacement while pushing the rotor away from the stator before engaging the inner shaft to rotate together with the rotor.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: October 17, 2017
    Assignee: Nuovo Pignone S.P.A.
    Inventors: Riccardo Bagagli, Leonardo Tognarelli
  • Publication number: 20170260997
    Abstract: A method for manufacturing impellers is described. The method provides for manufacturing a plurality of tubular components, each tubular component forming an inner passage, which is shaped as one of the flow passages of the final impeller. The tubular components are assembled together forming a semi-finished impeller. The semi-finished impeller is provided with annular cavities extending around the rotation axis of the impeller and gaps between adjacent tubular components. The gaps and cavities are filled with metal powder and the semi-finished impeller is subject to hot isostatic pressing, to densify the metal powder and form a monolithic final impeller.
    Type: Application
    Filed: July 2, 2015
    Publication date: September 14, 2017
    Applicant: Nuovo Pignon SrI
    Inventors: Paolo MOLA, Gabriele MASI, Mihirkumar Pravinbhai PATEL, Leonardo TOGNARELLI, Federico IOZZELLI
  • Publication number: 20160348661
    Abstract: A system for driving a reciprocating compressor is disclosed. The system includes a reciprocating compressor with a crankshaft. A Stirling engine is drivingly connected to the crankshaft of the reciprocating compressor. A heat source, for example a waste heat source, provides heat to the hot end of the Stirling engine. Heat is partly converted into mechanical power to drive the reciprocating compressor.
    Type: Application
    Filed: January 27, 2015
    Publication date: December 1, 2016
    Inventors: Leonardo TOGNARELLI, Ricardo BAGAGLI, Francesco BUFFA, Marco SANTINI
  • Publication number: 20160341188
    Abstract: The CNG system comprises a gas inlet line and a reciprocating compressor arranged and configured for compressing gas from the gas inlet line and delivering compressed gas towards a dispenser. A Stirling engine is drivingly connected to the reciprocating compressor. A burner receives gas from the gas inlet line and generates thermal energy for powering the Stirling engine.
    Type: Application
    Filed: January 30, 2015
    Publication date: November 24, 2016
    Inventors: Leonardo TOGNARELLI, Marco SANTINI, Francesco BUFFA
  • Publication number: 20160341187
    Abstract: The reciprocating motor-compressor comprises a frame wherein a crank-shaft is rotatingly housed. Compressor pistons are drivingly connected to the crankshaft and are reciprocatingly moved thereby in respective compressor cylinders. The crankshaft is driven into rotation by an em-bedded Stirling engine. The Stirling engine comprises at least a hot cylinder and a cold cylinder, wherein a respective hot piston and a respective cold piston are reciprocatingly moving. Thermal power is provided to the hot cylinder and partially converted into mechanical power for driving the reciprocating compressor.
    Type: Application
    Filed: January 30, 2015
    Publication date: November 24, 2016
    Inventors: Francesco BUFFA, Marco SANTINI, Leonardo TOGNARELLI, Carmelo MAGGI
  • Publication number: 20160281707
    Abstract: A crosshead-piston rod assembly for a reciprocating compressor comprises a piston rod; a crosshead having a bore; a connection element attached to the piston rod and at least partially inserted into the bore for connecting the crosshead to a piston.
    Type: Application
    Filed: October 27, 2014
    Publication date: September 29, 2016
    Inventors: Riccardo BAGAGLI, Leonardo TOGNARELLI, Francesco CHIESI, Tommaso BRESCHI
  • Publication number: 20160265659
    Abstract: A crosshead for a piston rod comprises a main body having a first seat and a second seat being configured to hold a connecting rod, the second seat being configured to hold a piston rod; the main body comprising a linking portion defining at least partially the first seat and the second seat for holding respectively the connecting rod and the piston rod; the main body comprising a closing portion defining at least partially the second seat and being configured to secure the piston rod inside the second seat.
    Type: Application
    Filed: October 27, 2014
    Publication date: September 15, 2016
    Inventors: Riccardo Bagagli, Francesco Chiesi, Fulvio D'urso, Leonardo Tognarelli
  • Patent number: 9297373
    Abstract: A differential pressure valve is disclosed, comprising: a valve body, the valve body having at least one flow inlet and one flow outlet; at least one shutter, the shutter being movable between an open position and a closed position under a differential pressure across the valve; a flow passage from the flow inlet to the flow outlet; at least one biasing member configured to bias the shutter towards a closed position so as to block the flow passage through the flow inlet. The biasing member comprises at least two springs arranged in parallel, one of the springs having at least one resonance frequency different from at least one resonance frequency of the other of the two springs.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: March 29, 2016
    Assignee: Nuovo Pignone S.P.A.
    Inventors: Riccardo Bagagli, Carmelo Maggi, Alberto Babbini, Leonardo Tognarelli
  • Publication number: 20150322960
    Abstract: An impeller for a turbo-machine is provided. The impeller includes a metallic base having a back surface and a front surface opposite to the back surface; at least one blade extending on the front surface of the metallic base; a composite shroud attached to the at least one blade such that plural closed paths are formed by the front surface of the metallic base, the at least one blade and the composite shroud; and a connector configured to attach the composite shroud to the metallic base or the at least one blade.
    Type: Application
    Filed: March 10, 2015
    Publication date: November 12, 2015
    Inventors: Iacopo GIOVANNETTI, Massimo GIANNOZZI, Dino BIANCHI, Leonardo TOGNARELLI, Manuele BIGI, Andrea MASSINI
  • Patent number: 9080676
    Abstract: Disclosed herein is a differential pressure poppet valve comprising: a valve body, the valve body having at least one flow inlet and at least one flow outlet; at least one shutter guide disposed inside the valve body; at least one poppet shutter guided by the shutter guide; at least one flow passage from the flow inlet to the flow outlet, the flow passage being formed between an inside surface of the valve body and an outside surface of the shutter guide and of the poppet shutter. The valve further comprises at least one biasing member configured to bias the poppet shutter towards a closed position so as to block the flow passage through the flow inlet. To reduce impact wear at least a first damper is provided, configured and arranged to at least partly absorb impact energy of the poppet shutter when the poppet shutter opens or closes the flow inlet.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: July 14, 2015
    Assignee: Nuovo Pignone S.P.A.
    Inventors: Riccardo Bagagli, Leonardo Tognarelli, Guido Volterrani, Michele Sanesi