Abstract: A method of controlling the injection of hydraulic fluid into a high pressure diaphragm compressor having a hydraulic system, the method including: measuring a representation of pressure in a high-pressure part of the hydraulic system of the diaphragm compressor, and maintaining a desired pressure in the high-pressure part of the hydraulic system by adding hydraulic fluid to the high-pressure part of the hydraulic system under the control of a controller on the basis of the measuring of pressure.

Abstract: A surgical rib retractor is disclosed. The surgical rib retractor has a housing and a body pivotably coupled to the housing and movable between a closed position and an open position. The surgical rib retractor further has a first arm unit pivotably coupled to the first shoulder and configured to receive one rib. The first arm unit may include a first arm, and a first strut movable relative to the first arm in a first plane defined by the first arm. The surgical rib retractor also has a second arm unit pivotably coupled to the second shoulder and configured to receive another rib. The second arm unit may include a second arm and a second strut movable relative to the second arm in a second plane define by the second arm, where the second plane is not parallel to the first plane when the body is in the closed position.

Abstract: A pressure sensor having a housing connected to a compressor head, the housing including a piston movably mounted in a cylinder, the cylinder is fluidly connected to a high-pressure part of a hydraulic system of the compressor, where the piston is adapted to be moved in a first direction away from the compressor head by the pressure of the hydraulic fluid in the high-pressure part, thereby moving a displacement member which is movably attached to the housing by one or more flexible suspensions, and the piston is adapted to be moved in a second direction towards the compressor head by the flexible suspension via the displacement member.

Abstract: A method of controlling the injection of hydraulic fluid into a high pressure diaphragm compressor having a hydraulic system, the method including: measuring a representation of pressure in a high-pressure part of the hydraulic system of the diaphragm compressor, and maintaining a desired pressure in the high-pressure part of the hydraulic system by adding hydraulic fluid to the high-pressure part of the hydraulic system under the control of a controller on the basis of the measuring of pressure.

Abstract: A surgical rib retractor is disclosed. The surgical rib retractor has a housing and a body pivotably coupled to the housing and movable between a closed position and an open position. The surgical rib retractor further has a first arm unit pivotably coupled to the first shoulder and configured to receive one rib. The first arm unit may include a first arm, and a first strut movable relative to the first arm in a first plane defined by the first arm. The surgical rib retractor also has a second arm unit pivotably coupled to the second shoulder and configured to receive another rib. The second arm unit may include a second arm and a second strut movable relative to the second arm in a second plane define by the second arm, where the second plane is not parallel to the first plane when the body is in the closed position.

Abstract: The invention relates to a high pressure diaphragm compressor for pressurizing a gaseous fluid to a pressure of at least 10 MPa, the compressor including a compressor head having an oblong shaped chamber.