Hydraulic fluid release valve assemblies

A hydraulic fluid release valve assembly, comprising:

• a hydraulic unit base with a hydraulic fluid return channel;
• a hydraulic fluid release valve that is at least partially inserted in the hydraulic fluid return channel;
• a driving assembly to apply a pushing force on the hydraulic release valve to open the hydraulic fluid release valve;
• and
• a driver connected to the driving assembly, the driver, when actuated, causes the driving assembly to move to apply the pushing force to the hydraulic fluid release valve;
• wherein the hydraulic fluid return channel of the hydraulic unit base has a first end and a second end opposite of the first end, wherein the first end of the hydraulic fluid return channel is located at a surface of the hydraulic unit base and the second end of the hydraulic fluid return channel is a closed-end enclosed by a block, and wherein the hydraulic fluid release valve partially extends out of the hydraulic unit base through the first end of the hydraulic fluid return channel;
• wherein the hydraulic fluid release valve comprises:
• a valve pin movably placed in the hydraulic fluid return channel and having a first end and a second end opposite of the first end, the first end of the valve pin being nearer to the first end of the hydraulic fluid return channel than the second end of the valve pin;
• and
• a valve seat disposed in the hydraulic fluid return channel between the first end of the valve pin and the first end of the hydraulic fluid return channel to seat the first end of the valve pin when the valve pin is urged to mate with the valve seat, wherein when the valve pin is seated on the valve seat, hydraulic fluid is prevented from flowing through the hydraulic fluid return channel;
• wherein the hydraulic fluid release valve further comprises a push rod movably disposed in the hydraulic fluid return channel and having a first end and a second end opposite of the first end, the first end of the push rod extending out of the hydraulic unit base through the first end of the hydraulic fluid return channel;
• wherein the hydraulic fluid release valve further comprises a first spring in contact with the push rod to urge the push rod towards the first end of the hydraulic fluid return channel, and a second spring disposed between the second end of the valve pin and the second end of the hydraulic fluid return channel to urge the first end of the valve pin towards the valve seat;
• wherein the valve pin is a two-stage valve pin that includes a primary valve pin and a secondary valve pin, the primary valve pin movably disposed in a secondary valve pin cavity of the secondary valve pin, a push pin attached to an end of the primary valve pin, wherein the push pin extends out of a hole at an end of the secondary valve pin cavity when the primary valve pin is fully inserted into the secondary valve pin cavity;
• and
• wherein an outer surface of the primary valve pin is provided with a spiral groove.

A valve assembly, comprising:

• a hydraulic unit base having a hydraulic fluid return channel disposed in the hydraulic unit base, the hydraulic fluid return channel having a first end and a second end opposite of the first end, wherein the first end of the hydraulic fluid return channel is located at a surface of the hydraulic unit base and the second end of the hydraulic fluid return channel is a closed-end enclosed by a block;
• a hydraulic fluid release valve that is at least partially inserted in the hydraulic fluid return channel, wherein the hydraulic fluid release valve partially extends out of the hydraulic unit base through the first end of the hydraulic fluid return channel;
• wherein the hydraulic fluid release valve includes a two-stage valve pin movably disposed in the hydraulic fluid return channel and having a first end and a second end opposite of the first end, the first end of the two-stage valve pin being nearer to the first end of the hydraulic fluid return channel than the second end of the two-stage valve pin, the two-stage valve pin includes a primary valve pin and a secondary valve pin, the primary valve pin movably disposed in a secondary valve pin cavity of the secondary valve pin, a push pin attached to an end of the primary valve pin, wherein the push pin extends out of a hole at an end of the secondary valve pin cavity when the primary valve pin is fully inserted into the secondary valve pin cavity;
• a valve seat disposed in the hydraulic fluid return channel between the two-stage valve pin and the first end of the hydraulic fluid return channel to seat the first end of the two-stage valve pin when the two-stage valve pin is urged to mate with the valve seat, wherein when the primary valve pin is fully inserted into the secondary valve pin cavity and when the two-stage valve pin is seated on the valve seat, hydraulic fluid is prevented from flowing through the hydraulic fluid return channel;
• a push rod movably disposed in the hydraulic fluid return channel and having a first end and a second end opposite of the first end, the first end of the push rod extending out of the hydraulic unit base through the first end of the hydraulic fluid return channel and the second end of the push rod to contact the push pin first before contacting the secondary valve pin when the push rod is urged towards the second end of the hydraulic fluid return channel;
• a driving assembly to apply a pushing force on the hydraulic release valve to open the hydraulic fluid release valve;
• and
• an electric driver connected to the driving assembly, the electric driver, when actuated, causes the driving assembly to move to apply the pushing force to the hydraulic fluid release valve, wherein the driving assembly includes a driving arm, an end of the driving arm being connected to the electric driver, wherein the driving arm is an articulated arm with a pivot point.