Patents by Inventor Graziantonio Apadula

Graziantonio Apadula 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).

  • Oil-hydraulic valve
    Patent number: 10337630
    Abstract: A pressure limiting valve (1), operationally arranged between a high pressure zone and low pressure zone (HP, LP) of a hydraulic circuit, comprises: a valve body (4) defining a passage (11) for a fluid; a closing member (8) having a stem (10) and a closing head (9) connected thereto and movably engaged with the valve body (4) so as to move along a longitudinal or axial direction (X) between positions (P1, P2) for closing and opening the passage (11), in an opening direction (OD) and closing direction (CD), respectively; a sleeve (12) which is joined to the stem (10); a spring (S1) arranged between the sleeve (12) and the valve body (4) so as to exert a force on the closing member (8) along said longitudinal or axial direction (X), in the closing direction (CD); said sleeve (12) is irreversibly locked to the stem (10) by means of a threadless mechanical connection, in a predefined longitudinal or axial position of the said stem (10), so that the spring (S1) exerts a force of predefined value on the closing mem
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: July 2, 2019
    Assignee: S.T. S.R.L.
    Inventors: Graziano Apadula, Graziantonio Apadula, Rocco Garcea
  • OIL-HYDRAULIC VALVE
    Publication number: 20140251464
    Abstract: A pressure limiting valve (1), operationally arranged between a high pressure zone and low pressure zone (HP, LP) of a hydraulic circuit, comprises: a valve body (4) defining a passage (11) for a fluid; a closing member (8) having a stem (10) and a closing head (9) connected thereto and movably engaged with the valve body (4) so as to move along a longitudinal or axial direction (X) between positions (P1, P2) for closing and opening the passage (11), in an opening direction (OD) and closing direction (CD), respectively; a sleeve (12) which is joined to the stem (10); a spring (S1) arranged between the sleeve (12) and the valve body (4) so as to exert a force on the closing member (8) along said longitudinal or axial direction (X), in the closing direction (CD); said sleeve (12) is irreversibly locked to the stem (10) by means of a threadless mechanical connection, in a predefined longitudinal or axial position of the said stem (10), so that the spring (S1) exerts a force of predefined value on the closing mem
    Type: Application
    Filed: October 17, 2012
    Publication date: September 11, 2014
    Inventors: Graziano Apadula, Graziantonio Apadula, Rocco Garcea