Patents by Inventor Antonio Nigra

Antonio Nigra 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).

  • Fuel diaphragm pump with shut-off valve
    Patent number: 4137889
    Abstract: A diaphragm pump for feeding fuel to internal combustion engines is described. The pump comprises one inlet duct for fuel from a tank provided with an outlet duct, and an outlet duct for the fuel from the pump, and comprises a suction valve and a discharge valve operated by the diaphragm to transfer the fuel from the inlet duct to the outlet duct. The main feature of the pump is to comprise a shut-off valve completely separate from the suction and discharge valves and disposed in the path of the fuel between the inlet duct and outlet duct, said shut-off valve being open during normal operation of the pump, and closing to block the passage of the fuel when the motor vehicle on which the pump is mounted overturn.
    Type: Grant
    Filed: July 21, 1977
    Date of Patent: February 6, 1979
    Assignee: Gilardini S.p.A.
    Inventor: Antonio Nigra