US 12,442,393 B2
Hydraulic device
Per Johansen, Tjele (DK); and Anders Hedegaard Hansen, Vestbjerg (DK)
Assigned to AALBORG UNIVERSITET, Aalborg Øst (DK)
Appl. No. 18/713,528
Filed by AALBORG UNIVERSITET, Aalborg Øst (DK)
PCT Filed Nov. 28, 2022, PCT No. PCT/DK2022/050249
§ 371(c)(1), (2) Date May 24, 2024,
PCT Pub. No. WO2023/093961, PCT Pub. Date Jun. 1, 2023.
Claims priority of application No. PA 2021 70588 (DK), filed on Nov. 29, 2021.
Prior Publication US 2025/0027514 A1, Jan. 23, 2025
Int. Cl. F15B 11/02 (2006.01); F15B 11/028 (2006.01)
CPC F15B 11/028 (2013.01) [F15B 2211/30565 (2013.01); F15B 2211/6336 (2013.01); F15B 2211/77 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A hydraulic device comprising
a housing;
a first tubular cavity and a second tubular cavity provided within the housing;
a reciprocatable arranged piston structure, the piston structure comprising a first piston and a second piston; wherein
the first piston divides the first cavity into two chambers, and
the second piston divides the second cavity into two chambers;
fluid passages for individually exchanging fluid between an exterior of the housing and the chambers of the first and the second cavities, where each fluid passage comprising a controllable shut-off valve, so as to provide a reciprocating movement of the piston structure by exchanging fluid between exterior and the two chambers of the first cavity,
the hydraulic device being configured to control the shut-off valves to selectively be in a closed state or in an open state
and
wherein the hydraulic transform further comprising pressure sensors, wherein said pressure sensors are configured to determining a pressure in the two chambers of the first cavity and the two chambers of the second cavity and wherein the determined pressures are used to control a state of the controllable shut-off valves.