Hydraulic apparatus, in particular hydraulic valve or hydraulic regulator

A hydraulic apparatus, comprising a housing, at least one piston axially displaceably supported in a housing bore, and a respective at least one compression spring acting on the at least one piston, wherein at least one regulating screw is externally accessible and adjustable within the housing bore to set a preload of the at least one compression spring in an axial direction, wherein the at least one regulating screw comprises at least one non-cylindrical jacket section, wherein the at least one non-cylindrical jacket section is a conical jacket section, to which at least one pin displaceably supported perpendicular to the axial direction of the regulating screw is adjacent and positioned as an optical and/or a haptic indicator for the preload of the at least one compression spring set via the regulating screw,

• wherein the at least one pin is divided into two parts comprising a visible pin and a regulating pin, with a hydraulic or pneumatic transmission being provided between the pins, the regulating pin contacting the regulating screw comprises a larger control surface than the visible pin exiting the housing or the bolt, with the visible pin being supported under a spring load at the housing or at the bolt, and
• wherein the visible pin comprises a mechanical latching function and an irreversible latching function, with the latching functions comprising a shaft securing ring that is seated on the visible pin and that is latchable into a corresponding groove of a pin mount of the bolt.

A hydraulic apparatus, comprising a housing, at least one piston axially displaceably supported in a housing bore, and a respective at least one compression spring acting on the at least one piston, wherein at least one regulating screw is externally accessible and adjustable within the housing bore to set preloads of the at least one compression spring in an axial direction, wherein an adjustment distance of the at least one regulating screw is divided into at least two adjustment ranges and torque applied for the adjustment of the regulating screw is larger in a second adjustment range than in a first adjustment range,

• wherein the at least one regulating screw comprises at least one non- cylindrical jacket section, wherein the at least one non-cylindrical jacket section is a conical jacket section, to which at least one pin displaceably supported perpendicular to the axial direction of the regulating screw is adjacent and positioned as an optical and/or a haptic indicator for the preload of the at least one compression spring set via the regulating screw,
• wherein the at least one pin is divided into two parts comprising a visible pin and a regulating pin, with a hydraulic or pneumatic transmission being provided between the pins, the regulating pin contacting the regulating screw comprises a larger control surface than the visible pin exiting the housing or the bolt, with the visible pin being supported under a spring load at the housing or at the bolt, and
• wherein the visible pin comprises a mechanical latching function and an irreversible latching function, with the latching functions comprising a shaft securing ring that is seated on the visible pin and that is latchable into a corresponding groove of a pin mount of the bolt.