Patents by Inventor Danilo PERSICI

Danilo PERSICI 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).

  • Gear pump or hydraulic gear motor with helical toothing provided with hydraulic system for axial thrust balance
    Patent number: 9567999
    Abstract: A gear pump has a toothed driving wheel, a toothed driven wheel, a front flange from which a projecting portion of the shaft protrudes, being connected to the shaft of the driving wheel, a back lid fixed to the case, and an intermediate flange between the case and the front flange. The intermediate flange has first and second chambers connected by a connection duct to the inlet or outlet fluid duct of the pump. A compensating ring is mounted in the first chamber and inserted on the shaft of the driving wheel to compensate the axial forces of the driving wheel and transmit the motion on the shaft of the driving wheel. A piston is mounted in the second chamber in order to stop against one end of the shaft of the driven wheel, in such manner to compensate the axial forces imposed on the toothed driven wheel.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: February 14, 2017
    Assignee: MARZOCCHI POMPE S.P.A.
    Inventors: Stefano Ferretti, Danilo Persici
  • GEAR PUMP OR HYDRAULIC GEAR MOTOR WITH HELICAL TOOTHING PROVIDED WITH HYDRAULIC SYSTEM FOR AXIAL THRUST BALANCE
    Publication number: 20160265528
    Abstract: A gear pump has a toothed driving wheel, a toothed driven wheel, a front flange from which a projecting portion of the shaft protrudes, being connected to the shaft of the driving wheel, a back lid fixed to the case, and an intermediate flange between the case and the front flange. The intermediate flange has first and second chambers connected by a connection duct to the inlet or outlet fluid duct of the pump. A compensating ring is mounted in the first chamber and inserted on the shaft of the driving wheel to compensate the axial forces of the driving wheel and transmit the motion on the shaft of the driving wheel. A piston is mounted in the second chamber in order to stop against one end of the shaft of the driven wheel, in such manner to compensate the axial forces imposed on the toothed driven wheel.
    Type: Application
    Filed: May 20, 2014
    Publication date: September 15, 2016
    Inventors: Stefano FERRETTI, Danilo PERSICI