Norrhydro Oy

Ari Sipola

Mika Sahlman

Matti Linjama

Hannu-Pekka S Vihtanen

Matti O Linjama

Arto T T Laamanen

Arto Laamanen

Hannu-Pekka Vihtanen

A hydraulic system and a method comprising a linear actuatorfor generating discrete sum forces, chambers A-D for generating discrete force components, at least two charging circuitsconfigured to maintain predetermined pressure levels of hydraulic fluid, independent control interfaces-configured to open and close connections of the first and second charging circuits to the chambers, and an electronic control unitfor controlling the control interfaces. At least two control interfaces are proportional valves which are used as shut-off valves and are independently switchable to the open and closed positions in a controlled manner. Moreover, non-throttled control and secondary control are implemented in the hydraulic system and the method.

Hydraulic system and method for controlling a hydraulic system

A method and a pressurized medium system, including: at least one actuator to generate sum forces effective on a load; a working chamber operating by displacement and located in the actuator; a charging circuit of a higher pressure, which is a source of hydraulic power; a charging circuit of a lower pressure, which is a source of hydraulic power; a control circuit, that couples the charging circuit of higher pressure and the charging circuit of lower pressure, in turn, to the working chamber; wherein the working chamber is capable of generating force components that correspond to the pressure of the charging circuit to be coupled to the working chamber, and each force component produces at least one of the sum forces either alone or in combination with the force components produced by the other working chambers of the actuator.

Digital hydraulic system

Growing community of inventors

Kangasala, Finland

Ari Sipola