High pressure hydraulic system with hose fittings for diffusing pressure buildup upon uncoupling

A high pressure hose for use in communicating high pressure liquid from an outlet fitting of a pressure washer comprising:

• a tubular hose segment having a connector fitting connected to an end of said tubular hose segment,
• said connector fitting having an axial stem having a central liquid passageway positionable into the outlet fitting for communicating liquid through said connector fitting between said outlet fitting and said tubular hose segment,
• at least two axially-spaced annular sealing members disposed about said axial stem, said connector fitting having a retaining ring threadably engageable with said outlet fitting for securing said axial stem in said outlet fitting with at least one of said annular sealing members in sealing engagement with said outlet fitting, said retaining ring being rotatable in a first direction for screwing said connector fitting onto said outlet fitting, and said retaining ring being rotatable in an opposite direction for unscrewing the retaining ring from the outlet fitting to permit removal of the connector fitting from the outlet fitting, and
• said connector fitting having a transverse passageway communicating from said central passageway outwardly through said axial stem at a location between at least two of said axially spaced annular sealing members such that upon unscrewing of said retaining ring from said outlet fitting at least a portion of a high pressure buildup within the tubular hose segment and outlet fitting is permitted to gradually dissipate and vent through the transverse passageway while said retaining ring retains said connector fitting on said outlet fitting.

A connector fitting for connection to and use in communicating high pressure liquid through a second fitting, said connector fitting comprising:

• an axial stem formed with a central liquid passageway;
• at least two axially-spaced annular sealing members disposed about said axial stem;
• a transverse passageway communicating from said central passageway outwardly through said axial stem at a location between two of said axially spaced annular sealing members;
• a retaining member engageable with said second fitting for securing said axial stem in an extension of said second fitting;
• wherein said retaining member is movable between a first position where at least one of said annular sealing members is in sealing engagement with said second fitting and a second position where at least a portion of a high pressure buildup can gradually dissipate and vent through the transverse passageway while said retaining member retains said connector fitting on said second fitting.