Abstract: A device with anti-gravity suspension is provided, comprising: a base, a torso support unit and a torso-wearing unit; wherein, the base is provided with two rails erected on two opposite sides; the torso support unit is connected to and movable up and down along the two rails, the torso support unit has a torso-holding portion for accommodating a torso, and the torso-holding portion is acted on by at least one actuating element disposed on the torso support unit to move up and down vertically; the torso-wearing unit is worn on the torso of a user, and a second coupling element disposed on the torso-wearing unit is connected to a first coupling element disposed on the torso-holding portion. When the user is held by the torso-holding portion, the torso weight load on the lower limbs can be reduced.

Abstract: A control line protector for protecting one or more downhole control lines running alongside a pipe, comprising a body with one or more channels, wherein each of the one or more channels is adapted to receive a control line, and an attachment assembly coupled to the body for attachment to an outer surface of the pipe, wherein the attachment assembly comprises an inner collar comprising a tubular portion and a plurality of gripping arms extending axially away from the tubular portion and arranged to deflect radially inwards and an outer sleeve adapted to slide at least partially over the inner collar, wherein when the inner collar and the outer sleeve are arranged axially around the pipe and pressed together each of the plurality of gripping arms is deflected radially inwards by the outer sleeve to grip the pipe and thereby secure the body to the outer surface of the pipe.

Abstract: An expansion apparatus and a method of manufacturing an expansion apparatus are provided. The expansion apparatus comprises an expandable element having a monolithic wall structure circumscribing a longitudinal axis and enclosing a space for receiving a pressurised fluid for use in inflating the expandable element between a non-expanded configuration and an expanded configuration. The wall structure is formed by additive manufacturing to have an initial non-expanded profile in which a perimeter length of the wall structure is greater than an outer gauge perimeter of the wall structure. Expansion during inflation is achieved by reforming the initial non-expanded profile of the wall structure to increase the outer gauge perimeter.

Abstract: A bounce treadmill is disclosed, with the main feature in that an annular running belt composed of a plurality of running belt units is arranged on a base, and each running belt unit at least comprises: a fixed seat, an elastic element and a running belt piece; wherein, two opposite ends of the fixed seat are respectively fixed to a pair of transmission elements arranged on the base, two ends of the elastic element are respectively fixed to the opposite ends of the fixed seat, two ends of the running belt piece are respectively fixed to the two opposite ends of the fixed seat, and the elastic element is connected to the bottom of the running belt piece, whereby when the running belt piece is bent and deformed under the weight to create a downward force, absorbed by the elastic element and an upward elastic force is provided.

Abstract: A direct-current (DC) voltage conversion device includes an energy providing circuit, a first transistor switch, a second transistor switch, a third transistor switch, a fourth transistor switch, and an output capacitor. The first transistor switch is turned on. The second transistor switch and the fourth transistor switch are turned off. The energy providing circuit charges the parasitic capacitance of the second transistor switch. When the third transistor switch is turned on, the parasitic capacitance discharges the output capacitor to establish the same voltage drops across the parasitic capacitance and the output capacitor. After establishing the same voltage drops across the parasitic capacitance and the output capacitor, the parasitic capacitance of the second transistor switch charges the parasitic capacitance of the fourth transistor switch, thereby establishing a zero voltage drop across the fourth transistor switch and achieving zero voltage switching.

Abstract: A universal charging device and a universal charging method thereof is disclosed. An AC voltage is converted into a DC charging voltage. At least two first charging processes are sequentially performed. In each first charging process, the DC charging voltage is adjusted to be larger than the terminal voltage of a battery based on the terminal voltage and the DC charging voltage charges the battery. The DC charging voltage generates a DC charging current and a pulse current to flow through the battery until the terminal voltage is equal to the DC charging voltage. A voltage across the battery established by the pulse current satisfies a charged condition. When the terminal voltage is equal to the DC charging voltage, the DC charging current is converted into a decreasing trickle current until the value of the trickle current is decreased to a triggered current value.

Abstract: A rotatable power plug assembly is disclosed, which comprises: a first connection module, a second connection module and a plug module, wherein the second connection module is connected between the first connection module and the plug module. According to the present invention, the first connection module comprises a first base that is disposed on a housing of the power device, and there are two first conductive pins and two second conductive pins provided on the first base. Moreover, the plug module comprises two prongs and two electrical units electrically connected to the prongs. The two electrical units contact with the first conductive pins and two second conductive pins through the second connection module. By such arrangement, the rotatable power plug assembly according to the present invention has multiple advantages, including: comprising elements and units can be simply assembled, modular design, high durability, and high security.

Abstract: A direct-current (DC) voltage conversion device includes a resonate driving device, at least two second transformers, at least two second transformers, at least two third transformers, and a rectifying device. The primary sides of the second transformers are connected in series via a first conductive wire and coupled to the resonate driving device via a second conductive wire. The primary sides of the second transformers are connected in series via a third conductive wire and coupled to the resonate driving device via a fourth conductive wire. The primary sides of the third transformers are connected in series via a fifth conductive wire and coupled to the resonate driving device via a sixth conductive wire. The rectifying device is coupled to the secondary sides of the transformers.

Abstract: A power conversion device includes a transformer, a first electrical switch, a second electrical switch, at least one balanced capacitor, at least one voltage-stabilizing capacitor, and a power-providing circuit. The first electrical switch, the second electrical switch, the balanced capacitor, and the voltage-stabilizing capacitor are connected to the primary side of the transformer, and the secondary side of the transformer is connected to the power-providing circuit. The primary side has a first terminal, a second terminal, and a third terminal therebetween. The first electrical switch and the second electrical switch are respectively connected to a high-voltage terminal and a low-voltage terminal, and the voltage-stabilizing capacitor is connected between the two voltage terminals. One end of the balanced capacitor is connected to the third terminal, and another end of the balanced capacitor is connected to the voltage-stabilizing capacitor or the voltage terminals.

Abstract: A system and method for measuring the weight of a user using an scale, the scale having an inflatable pouch with a fluid pressure sensor and a temperature sensor placed therein; a processing circuitry connected to the fluid pressure sensor and the temperature sensor; a communication interface connected to the processing circuitry; wherein the fluid pressure sensor is configured to determine an internal pressure from the fluid pressure sensor, and the temperature sensor is configured to determine an internal temperature within the inflatable pouch; wherein the processing circuitry is configured to calculate a weight of an object placed on the inflatable pouch based on the determined internal pressure and internal temperature; and wherein the processing circuitry is configured to relay the calculated weight of the object to a user device via the communication interface.

Abstract: A system and method for fracturing a well can comprise a base pipe comprising an insert port capable of housing a stop ball partially within the chamber of it, and a sliding sleeve. The sliding sleeve can comprise a first sleeve with an in inner surface. That inner surface can comprise a void. The first sleeve can be maneuverable into two positions. In the first position, the void can rest on a surface of the base pipe not comprising an insert port. Such positioning can prevent a stop ball from exiting the chamber of the base pipe. In the second position, the void can rest over an insert port. Such positioning can allow the stop ball to the chamber of the base pipe and to enter the void.

Abstract: An improved autonomous well valve has a body that constitutes an actuator for opening and closing of first and second valves. The body has a body axis of symmetry. The body, which in operation is submerged, has an effective density that is equal or greater than the density of a first fluid and less than the density of a second fluid. The body is placed in a housing, the housing having a housing axis of symmetry. At least two first valves are designed to allow flow between the inside and outside of the housing, are distributed about the body axis and mechanically connected between the body and the housing. The body axis at the first valves is restricted from moving above the housing axis.

Abstract: A system and method for detecting screen-out using a fracturing valve for mitigation, wherein the fracture method can comprise fracturing a well using a fracturing valve, while a downhole pressure is less than a predetermined threshold. The method can also comprise actuating by automated process the fracturing valve from a fracturing position to a nonfracturing position upon detecting by a pressure sensor in the wellbore that the downhole pressure has reached the predetermined threshold.

Abstract: This disclosure relates to system and method for delaying actuation using a destructible impedance device. In one embodiment, a delayed actuating system can comprise a base pipe comprising a first portion of an orifice, a sliding sleeve around the base pipe, the sliding sleeve comprising a second portion of said orifice, further said sliding sleeve maneuverable into a first position, wherein said first portion of said orifice rests at least partially over said second portion of said orifice, a second position, a distance away from said second position. Further, the delayed actuating system can comprise a biasing device biasing the sliding sleeve toward the second position, and a destructible impedance device at least partially in side said orifice, the destructible impedance device preventing the sliding sleeve from leaving the first position.

Abstract: Anhydrous dyeing method for textile, including the steps of: using a pure dye as a plating material and a textile fabric as a substrate, and depositing the dye onto a surface of the textile fabric by using a physical vapor deposition technique. The color of plated textile fabric is fixed through steaming, heat setting or other post-processing methods. The invention achieves the purpose of dyeing textile fabric by depositing dye onto the surface of the textile fabric uniformly and densely using a physical vapor deposition technology, and fixing the color in a finishing step. The process is simple and convenient, produces no waste water discharge, has a high utilization rate of dye, and is operable and feasible for mass production.

Abstract: A system and method for measuring the weight of a user using an scale, the scale having an inflatable pouch with a fluid pressure sensor and a temperature sensor placed therein; a processing circuitry connected to the fluid pressure sensor and the temperature sensor; a communication interface connected to the processing circuitry; wherein the fluid pressure sensor is configured to determine an internal pressure from the fluid pressure sensor, and the temperature sensor is configured to determine an internal temperature within the inflatable pouch; wherein the processing circuitry is configured to calculate a weight of an object placed on the inflatable pouch based on the determined internal pressure and internal temperature; and wherein the processing circuitry is configured to relay the calculated weight of the object to a user device via the communication interface.

Abstract: A sealing method and sealing arrangement is described. The sealing arrangement comprises a body and first and second sealing elements mounted thereon. The sealing elements are each movable between a retracted configuration and an extended configuration and are configured to move from the retracted configuration to the extended configuration in response to an axial compression. The second sealing element is however maintained in its retracted configuration until the first sealing element has moved from its retracted configuration to its extended configuration. The sequential extension of the sealing elements can deform to assume the extended configuration under compression and the progression and the form of the deformation can be arranged to improve the quality of the seal achieved. An extended sealing element in engagement with the bore wall may also serve as an anchor or retainer and facilitate application of a compression force to an intermediate sealing element.

Abstract: A method is for removing casing from a well. The method includes setting a first sealing element into fluid-sealing engagement with the inside of the casing, lowering a flow-through string into the well, a cutting tool and a second, reversibly expandable sealing element being connected to the string, forming perforations into the casing by means of said cutting tool, expanding the second, expandable sealing element into fluid-sealing engagement with the inside of the casing, passing a pressurized fluid through the string and into the annulus via the perforations, so that the viscous and/or solid mass is displaced up the annulus, cutting the casing around its entire circumference; and pulling a length of the casing up from the well.