Filter for hydraulic fluids for hydraulic circuits

A filter for hydraulic fluids for hydraulic circuits comprising a closed filter body and at least one filtering cartridge, wherein:

• said filter body comprises a tubular body delimited by a side wall and extending longitudinally along a predefined axial direction from a first head end to a second distal head end;
• said filter body comprises at least one hydraulic fluid inlet in communication with a supply chamber positioned at said first head end;
• said filter body comprises at least one hydraulic fluid outlet positioned in a substantially median portion of said side wall of the tubular body;
• a compartment is identified in said tubular body of said filter body, in fluid communication with said supply chamber, intended to removably house said filtering cartridge;
• said filtering cartridge comprises a tubular body extending longitudinally along said predefined axial direction from a first head end, connected in fluid-tight communication with said supply chamber, to a second head end closed by a bottom;
• said tubular body of said filtering cartridge comprises a continuous tubular layer of filtering material suitable for being crossed by a pressurized hydraulic fluid for performing a filtering action on said pressurized hydraulic fluid;
• said filtering cartridge is housed and supported removably in said compartment of said tubular body, and
• said continuous tubular layer of filtering material subdivides said housing compartment:
• into a first chamber internal to said continuous tubular layer of filtering material and in fluid-tight communication with said supply chamber and
• into a remaining external portion comprised between said tubular layer of filtering material and said side wall of the tubular body, said continuous tubular layer of filtering material of said filtering cartridge being configured and positioned in said filter body to be interposed in a hydraulic fluid path between said inlet opening and said at least one outlet opening and to be crossed by the hydraulic fluid and to carry out the filtering action thereon, causing the filtration of hydraulic fluid entering said filter body through said at least one inlet opening and exiting from said filter body through said at least one outlet opening, wherein:
• said filtering cartridge comprises a first tubular support element circumscribed about said continuous tubular layer of filtering material for exerting on said continuous tubular layer of filtering material a containment/encircling action, in order to preserve the geometry of said continuous tubular layer of filtering material also in the presence of pressurized hydraulic fluid;
• said first tubular support element comprises a plurality of passages in order to be crossed by a flow of hydraulic fluid transiting through said continuous tubular layer of filtering material and
• said filtering cartridge also comprises a second tubular element:
• circumscribed about said first tubular support element;
• spaced at a predefined distance from said first tubular support element and
• comprising a plurality of passages in order to allow to be crossed by a flow of hydraulic fluid transiting through said continuous tubular layer of filtering material and through said first tubular support element,
• said second tubular element subdividing said remaining external portion of said compartment comprised between said tubular layer of filtering material and said side wall of the tubular body:
• into a first intermediate chamber comprised between said tubular layer of filtering material and said second tubular element and
• into an external chamber comprised between said second tubular element and said side wall of the tubular body of said filter body, said second tubular element acting in said filter as a diffuser for slowing down the hydraulic fluid and reducing turbulence.