A frameless lightweight jack may include a pressure cylinder, the pressure cylinder having a pressure cylinder passage and a pressure cylinder body including a body passage, the pressure cylinder body mechanically coupled to the pressure cylinder. A first and a second hydraulic actuator may be coupled to the pressure cylinder body on a proximal end, the actuators are in hydraulic communication through a cylinder loop hose connected to each hydraulic actuator. An extending body may be coupled to the hydraulic actuators, and may include an extending body passage, wherein the pressure cylinder passage, the pressure cylinder body passage, and the extending body passage are aligned to form a tension member channel. A strand grabber assembly may be mechanically coupled to the extending body, wherein the pressure cylinder, pressure cylinder body, and extending body are comprised of aluminum, titanium, fiber reinforced plastic, polymers, or carbon fiber.

A frameless lightweight jack may include a pressure cylinder, the pressure cylinder having a pressure cylinder passage and a pressure cylinder body including a body passage, the pressure cylinder body mechanically coupled to the pressure cylinder. A first and a second hydraulic actuator may be coupled to the pressure cylinder body on a proximal end, the actuators are in hydraulic communication through a cylinder loop hose connected to each hydraulic actuator. An extending body may be coupled to the hydraulic actuators, and may include an extending body passage, wherein the pressure cylinder passage, the pressure cylinder body passage, and the extending body passage are aligned to form a tension member channel. A strand grabber assembly may be mechanically coupled to the extending body, wherein the pressure cylinder, pressure cylinder body, and extending body are comprised of aluminum, titanium, fiber reinforced plastic, polymers, or carbon fiber.

A modular system for the shelter, transport, positioning and elevation of sensors including a first module (A, I) and a second module (B, II) side by side and cooperating with each other. The first module operates as a functional block with vertical translation and the second module operates as a functional block with rotation/horizontal translation. Each module comprises a lifting means and together the two modules enable a sequential lifting of the sensor means in two phases. In one embodiment, there is also a third interfacing module (C) responsible for the switching of functional blocks included in the first and/or second module.

A modular system for the shelter, transport, positioning and elevation of sensors including a first module (A, I) and a second module (B, II) side by side and cooperating with each other. The first module operates as a functional block with vertical translation and the second module operates as a functional block with rotation/horizontal translation. Each module comprises a lifting means and together the two modules enable a sequential lifting of the sensor means in two phases. In one embodiment, there is also a third interfacing module (C) responsible for the switching of functional blocks included in the first and/or second module.

A hydraulic oil-circuit system and a hydraulic jack are proposed. The hydraulic oil-circuit system includes a hydraulic cylinder, an oil loading chamber, a storage oil chamber and an oil unloading pipeline; a piston is arranged in the hydraulic cylinder and divides the hydraulic cylinder into a first hydraulic oil chamber and a second hydraulic oil chamber; the first hydraulic oil chamber has a first oil port, and the second hydraulic oil chamber has a second oil port; the first oil port and the second oil port are both in unidirectional communication with the oil loading chamber and are both in unidirectional communication with the storage oil chamber; and the oil unloading pipeline connects the oil loading chamber and the storage oil chamber.

A hydraulic oil-circuit system and a hydraulic jack are proposed. The hydraulic oil-circuit system includes a hydraulic cylinder, an oil loading chamber, a storage oil chamber and an oil unloading pipeline; a piston is arranged in the hydraulic cylinder and divides the hydraulic cylinder into a first hydraulic oil chamber and a second hydraulic oil chamber; the first hydraulic oil chamber has a first oil port, and the second hydraulic oil chamber has a second oil port; the first oil port and the second oil port are both in unidirectional communication with the oil loading chamber and are both in unidirectional communication with the storage oil chamber; and the oil unloading pipeline connects the oil loading chamber and the storage oil chamber.

A dual action hydraulic piston assembly including a cylinder having first and second inlet ports on a first end and an outlet port on a second end, a conduit connected to the first inlet port and extending into the cylinder, an inner ram slidable along an outer surface of the conduit, and an outer ram slidable between the inner ram and the cylinder. The inner and outer rams are configured to move together toward the second end of the cylinder in response to a fluid being displaced via the first inlet port into the conduit, which displaces a second fluid through the outlet port at a first flow rate. The outer ram is configured to move toward the second end of the cylinder in response to a fluid being displaced via the second inlet port, which displaces the second fluid through the outlet port at a second flow rate.