Abstract: A vertical axis wind turbine with improved safety, production efficiency and greater functional wind speed range. A vertical axis wind turbine comprises turbine blades having geometric characteristics of a “yin yang” symbol when viewed from the top down. The turbine blades are configured to form a scoop portion for catching wind. The surface area of the scoop portion may be dynamically configured to accommodate power production in higher wind speed ranges by dynamically furling the blades to reduce the surface area of the scoop portion as RPM begins to exceed a safe limit. First and second permanent magnet rotor arrays are dynamically positioned above and below an array of stator coils to maximize power generation.

Abstract: A system for controlling a generator rotor locking pin, comprising a fixed locking pin and a rotor formed with a locking hole, and further comprising a detection reference component synchronously rotating with the rotor and formed with a detection hole, the detection hole radially corresponding to the locking hole; an optical quantity detection component fixed with respect to the rotor; and a control component configured to output a first control instruction to a rotor driving component according to a position signal of the detection hole obtained by the optical quantity detection component. The detection hole is used as an object to be detected, so that the circumferential relative position relationship of the locking hole with respect to the locking pin can be accurately determined, to output the first control instruction to the rotor driving component, thereby accurately centering the locking pin and the locking hole along with the rotation of the rotor.

Abstract: The present invention relates to an insulated shaft joint (1) for electrically insulating a rotational member (2) from an end section of a shaft (3) to which the rotational member (2) is connected. The insulated shaft joint (1) comprises a plurality of first grooves (4) arranged in an outer surface of the end section of the shaft (3) and extending in an axial direction of the shaft (3), one or more rows of electrically insulating members (5), and an annular electrically insulating cage (6) arranged circumferentially around the plurality of first grooves (4). The insulating cage (6) comprises one or more rows of through-going openings (7), arranged circumferentially. The through-going openings (7) is being shaped and dimensioned so that they are adapted to surround and guide the insulating members (5). The rotational member (2) is arranged circumferentially around the annular electrically insulating cage (6).

Abstract: A method and a system for calibrating a wind vane of a wind turbine, a method for monitoring a wind turbine, and a method for operating a wind turbine are provided.

Abstract: A method for controlling a wind power installation, to an associated wind power installation and to a wind farm with a number of wind power installations. The method comprises: providing a wind speed and a direction of incident flow, which are determined by a wind measuring device of the wind power installation, providing a correction value of the direction of incident flow in dependence on the wind speed, carrying out a process of learning the correction value of the direction of incident flow in dependence on the wind speed. The learning process comprises a number of optimizing steps, an execution of the optimizing steps depending on the optimizing steps that have already been carried out for the wind speed provided. Improved tracking of the wind is provided.

Abstract: A method and apparatus for estimating a characteristic of a wind turbine electrical signal comprises buffering a sequence of sample values of the wind turbine electrical signal and a sequence of sample times corresponding with the sequence of sample values. The time periods represented by the sample times are variable. A sub-sequence of the buffered sample values to integrate is determined, based at least in part on a sum of the time periods. The characteristic is estimated by integrating the sample values in the sub-sequence.

Abstract: An oscillation damper may comprise a suspension having a suspension length. The oscillation damper may comprise a pendulum which may be suspended by the suspension and may have a pendulum mass. The pendulum may comprise a fixed part which may have a side face. The pendulum may comprise a slideable part for collision with a movement limiter. The slideable part may be a substantial portion of the pendulum mass. The slideable part may comprise one or more stacked plates which may be positioned on the fixed part, and the one or more plates may extend beyond the side face. The oscillation damper may comprise a movement limiter. The movement limiter may face the pendulum.

Abstract: The invention relates to an energy generating station comprising an electrical energy generating system and a warm water and cold water production system cooperating with the electrical energy generating system. Optionally, the energy generating station also comprises a desalination module and a climate-based energy generating system, both cooperating with the electrical energy generating system.

Abstract: The present invention relates to a barrel-type piston pump (1) with a swash plate (7) where the angle of inclination of rotary plate (2) relative to drive shaft (5) is adjustable by means of a finger joint (8).

Abstract: A motor pump of the present invention includes a rotating shaft rotatable around an axis, a driving section including a rotor core integrally fixed to an outer circumference of the rotating shaft and a stator surrounding an outer circumference of the rotor core, a compression section which compresses a working fluid, a casing surrounding the rotating shaft, the driving section, and the compression section, a partition member radially partitioning the inside of the casing into a first space in which the stator is disposed and a second space in which the rotor core is disposed, a first connection path connecting the first space to a first portion in the compression section, and a second connection path connecting the second space to a second portion in which the pressure of the working fluid is higher than that of the first portion in the compression section.

Abstract: Embodiments of the present disclosure includes a method of calibrating a pump in a system to determine a minimum pump duty cycle needed. The system comprises a pump, a plurality of application lines downstream of the pump, and a flow control device in each application line. The method determines the minimum pump duty cycle to achieve total flow in the system, achieves a minimum pressure in the system, and ensures that the flow control device is not at or beyond a maximum open position.

Abstract: A swash plate compressor including a cylinder block accommodating a piston for compressing a refrigerant, a front housing coupled to the front of the cylinder block and having a crank chamber, a rear housing having a suction chamber, a discharge chamber and coupled to the rear of the cylinder block. The swash plate compressor includes a valve assembly including a valve plate inserted into the rear housing, a gasket inserted into the cylinder block, a suction plate inserted between the valve plate, the cylinder block, and a variable orifice module including a first orifice hole through which the refrigerant in the crank chamber passes, a second orifice hole communicating with the suction chamber to discharge the refrigerant passing through the first orifice hole to the suction chamber, and an intermediate passage interconnecting the first and second orifice holes, the first orifice hole having a variable reed, a degree of opening of which is varied depending on the pressure of the refrigerant.

Abstract: A cryopump includes a cryocooler which includes a high-temperature cooling stage and a low-temperature cooling stage, a radiation shield which is thermally coupled to the high-temperature cooling stage and axially extends in a tubular shape from a cryopump intake port, and a low-temperature cryopanel section which is thermally coupled to the low-temperature cooling stage, is surrounded by the radiation shield, and includes a plurality of cryopanels and a plurality of heat transfer bodies axially arranged in columnar shape, and in which the plurality of cryopanels and the plurality of heat transfer bodies are axially stacked.

Abstract: A cryopump includes a cryocooler which includes a high-temperature cooling stage and a low-temperature cooling stage, a radiation shield which is thermally coupled to the high-temperature cooling stage and axially extends in a tubular shape from a cryopump intake port, a low-temperature cryopanel section which is thermally coupled to the low-temperature cooling stage, is surrounded by the radiation shield, and includes axially arranged cryopanels including a top cryopanel disposed closest to the cryopump intake port, and a top cryopanel accommodation cryopanel which is thermally coupled to the high-temperature cooling stage and is disposed in the cryopump intake port to form a top cryopanel accommodation compartment.

Abstract: A linear compressor includes a frame including a frame body, a frame head that extends from a front end of the frame body, a flange groove defined in the frame head, and a body hole that passes through the frame body; a cylinder including a cylinder body inserted into the body hole, a cylinder flange, and a cylinder head provided on a front end of the cylinder flange; and a lock ring press-fitted to be coupled to the flange groove and provided in a space defined between the cylinder head and an inner circumferential surface of the flange groove.

Abstract: A fluid control device includes a piezoelectric pump having a piezoelectric element, a driving circuit that receives a driving power supply voltage applied thereto and drives the piezoelectric element, and a startup circuit disposed between the driving circuit and an input terminal for a power supply voltage. The startup circuit increases the driving power supply voltage to a voltage (V1) lower than a constant voltage (Vc) in a first stage (P1) after startup, maintains or decreases the driving power supply voltage in a second stage (P2) following the first stage (P1), and increases the driving power supply voltage to the constant voltage (Vc) in a third stage (P3) following the second stage (P2).

Abstract: The present invention pertains to the technological field of cooling compressors and, more specifically, relates to an anti-flame protection arrangement for the electrical connections of said cooling compressor. Problem to be solved: Ensure end-user safety of the compressor through a simple and inexpensive solution and preventing the maintenance and/or propagation of flames/fire in the region of the chamber defined by the protective cover of the electrical connections external to the compressor housing.

Abstract: An axial piston machine includes a housing, an actuating piston, and a closing screw. The housing includes a cylinder bore, a recess, and a fluid channel. An end of the bore open to an outside of the housing has an internal thread. The recess is located in a region of the internal thread, and is deeper than a thread depth of the internal thread so that a floor region of the recess is free from thread turns. The piston is linearly moveable in the cylinder bore, and is configured to adjust a displacement volume of the machine. The screw is screwed into the internal thread so as to form a closed chamber between the piston and the screw. The fluid channel opens into the floor region of the recess, and is fluidically connected to the cylinder chamber.

Abstract: A closure for a fluid end having a middle sealing section which engages a seal. The sealing section either has a larger outer diameter than adjacent sections or contacts a bore with a smaller inner diameter than adjacent sections. In either case, the clearance formed on either side of the sealing section reduces friction and allows the closure to be rocked back and forth to insert and remove the closure from the fluid end bore.

Abstract: A connection assembly for use in an axial piston machine has a feed pump and a main body. The main body is equipped with at least one fluid connection. The feed pump is configured as an internal gear pump or as a vane-type pump. A pump assembly defines a planar sealing surface which bears at least indirectly against the main body. The main body has a second recess in which the pump assembly is received at least in certain portions. A separate cover is provided which covers the second recess and the pump assembly in each case at least in certain portions. The cover bears against the main body. An elastic element is installed under preload between the cover and the receiving part such that a corresponding preload force is supported at least indirectly on the main body via the sealing surface.

Abstract: The invention relates to a screw spindle pump (1) with a housing (2) which has an inlet (22) and an outlet (21) for a medium, with two spindles (3, 4) which are designed as shafts with respectively at least one external screw thread (31, 41), wherein the spindles (3, 4) are mounted next to each other in the housing (2) and the screw threads (31, 41) engage in each other in order to convey the medium from the inlet (22) to the outlet (21). The invention provides that each spindle (3, 4) is mounted in an axial bearing (5.1, 5.2) and the axial bearings (5.1, 5.2) are arranged diagonally opposite each other.

Abstract: A scroll compressor includes scroll members that include a compression chamber to compress working fluid, a housing that houses the scroll members, a second driving-side shaft portion that discharges the compressed working fluid from the compression chamber and is rotated around an axis with respect to a second driving-side shaft portion accommodation portion of the housing, and a seal member that is fixed to an outer periphery of the second driving-side shaft portion and comes into contact with an inner peripheral surface of the second driving-side shaft portion accommodation portion for sealing. The second driving-side shaft portion accommodation portion includes a wear resistant portion on the inner peripheral surface coming into contact with the seal member.

Abstract: An inter-stage coupling for a multi-stage vacuum booster pump may include a first coupling face configured to be received by a first adjacent stage of the multi-stage vacuum pump; a second coupling face configured to be received by a second adjacent stage of the multi-stage vacuum pump; and a recirculator comprising a recirculation inlet aperture formed in the first coupling face, a recirculation outlet aperture formed in the first coupling face, and a recirculation conduit having a recirculation valve configured to selectively fluidly couple the recirculation inlet aperture with the recirculation outlet aperture. In this way, the pressure in a stage can be relieved by fluidly coupling the outlet aperture with the inlet aperture in order to recirculate built-up gas from one part of the first stage pump to another part of the first stage pump in order to reduce the strain on the rotor.

Abstract: A compressor may include a shell, a first compression mechanism, and a second compression mechanism. The shell may define a first chamber containing fluid at a first fluid-pressure. The first compression mechanism may be disposed within the first chamber and may include a first orbiting scroll and a first non-orbiting scroll. The first compression mechanism discharging compressed fluid into the first chamber at the first fluid-pressure. The second compression mechanism may be disposed in the first chamber and may include a second orbiting scroll and a second non-orbiting scroll. The second compression mechanism may define a suction inlet and a discharge outlet. The suction inlet may receive fluid at the first fluid-pressure from the first chamber such that the fluid at the first fluid pressure flows from the first compression mechanism to the suction inlet without exiting the shell. The discharge outlet may discharge fluid at a second fluid-pressure out of the shell.

Abstract: A scroll compressor according to the present invention includes a casing, an orbiting member provided within the casing and performing an orbiting motion, a non-orbiting member forming a compression chamber together with the orbiting member, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a communication passage configured to bypass a refrigerant of the compression chamber into the casing, an opening/closing valve assembly configured to open and close the communication passage, and a switching valve assembly configured to operate the opening/closing valve assembly, the switching valve assembly being provided outside the casing and connected to the opening/closing valve assembly, whereby an installation of the bypass hole can result in prevention of over-compression and an installation of a control valve for varying a capacity outside the casing can result in reduction of costs for the control valve.

Abstract: A scroll compressor is disclosed, which comprises an auxiliary discharge path capable of sufficiently making sure of a discharge area at an initial discharge stage. The compressor comprises a fixed scroll including a fixed end plate portion and a fixed wrap, and an orbiting scroll including an orbiting end plate portion and an orbiting wrap, wherein a discharge hole is formed in the fixed end plate portion, and an auxiliary discharge path for connecting a side of the orbiting wrap with a bottom surface of the orbiting wrap is provided to be communicated with the discharge hole, whereby a compressed refrigerant may be discharged through the auxiliary discharge path.

Abstract: A coupling has an opening and a protrusion extending downward from the opening. The protrusion has threads that are preferably positioned outside of the opening. A rotor shaft that connects to the coupling has an internal bore with threads that receives and retains the protrusion, such as by a threaded connection between the two, so the protrusion applies driving force to the shaft.

Abstract: A coupling has an opening and a protrusion extending downward from the opening. The protrusion has threads that are preferably positioned outside of the opening. A rotor shaft that connects to the coupling has an internal bore with threads that receives and retains the protrusion, such as by a threaded connection between the two, so the protrusion applies driving force to the shaft.

Abstract: The present invention is directed to a spa tub (and to a spa chair that includes a spa tub) that has a sprayer with a thermal meter so that an employee does not need to touch or feel the water and/or fluids to gauge the temperature of the water and/or fluids. The spa tub may also have a water pump and/or an air pump assembly that is designed and configured to be mounted to the wall of a basin for providing massage therapy to a user. In addition, the spa tub may additionally have a liner and/or an air dispenser. As a non-limiting embodiment, a spa chair includes a spa tub, a basin, a mounting housing member, and a sprayer with a thermal meter. The spa chair may also include a jet assembly, an air pump assembly a spa base, a gasket or seal, an air dispenser, and/or a liner.

Abstract: The invention discloses a thin-wall-long-shaft-low-noise transmission mechanism for pedestal pumps, which includes a stainless steel pipe, a bushing, a pump body, an impeller and a motor, the motor is arranged above the stainless steel pipe, the bushings are embedded at both ends of the stainless steel pipe, the impeller includes an impeller hub shaft, the motor includes a motor shaft, the impeller hub shaft passed through the pump body and connected to the bushing which is embedded in one end of the stainless steel pipe. Through the above solution, this present invention provides a thin-wall-long-shaft-low-noise transmission mechanism for pedestal pumps, the machining precision of thin wall stainless steel pipe is higher than that of a solid metal shaft and a plastic shaft, the strength is higher than that of a plastic shaft, and the noise reduced when the pump is working.

Abstract: A suction pipe inlet device for a centrifugal pump, the device having a hollow tubular axisymmetric body along a longitudinal axis having an open first end adapted for fitting into or against a retention tank; an open second end adapted for fitting into or against an inflow end of a suction pipe having an outer pipe diameter and an inner pipe diameter; a converging section located closer to the retention tank; a diverging section located closer to the suction pipe; a throat located at the intersection point between the converging and diverging sections, the converging and diverging sections defining an interior converging-diverging geometry within the tubular axisymmetric body and the throat defining a minimum inner cross sectional area of the tubular axisymmetric body.

Abstract: A compressor unit includes a flow control valve controlling a flow rate of a bypass pipe according to a valve command signal, a compressor inverter, and a controller. A range of operation frequency values is limited to a first operation frequency interval from a lower limit value to a first value and a second operation frequency interval from a second value to an upper limit value. When a target flow rate is between a first discharge flow rate and a second discharge flow rate, the controller generates an inverter command signal such that the operation frequency is set to the second operation frequency interval, and generates the valve command signal such that the flow rate of the bypass pipe coincides with a differential flow rate obtained by subtracting the target flow rate from a discharge flow rate of a compressor body obtained by the inverter command signal.

Abstract: A ceiling fan blade mounting structure includes a blade holding base and a fastening assembly. The blade holding base includes a plurality of connection members spaced apart from each other. The fastening assembly includes a wedging member, a rotating block, and a fastening member. The wedging member is fastened with one of the plurality of connection members. A first end of the rotating block is rotatably connected to the wedging member. A first end of the fastening member is rotatably connected to a second end of the rotating block. The fastening member is configured to rotate about the rotating block to cause a second end of the fastening member to be fastened with another one of the plurality of connection members.

Abstract: A fan blade has a body made of plywood/fiberboard and having two opposite ends, at least one assembling hole disposed at one of the two opposite ends of the body, and a tip disposed at the other one of the two opposite ends of the body and being flat or curved. A manufacturing method for the fan blade has four steps. Step 1: manufacturing plywood panels/fiberboards by carpentry machining. Step 2: adhering paper/veneers/melamine paper to the plywood panels/fiberboards. Cutting the plywood panels/fiberboards into shape to form the body. Step 3: cleaning debris on the body. Step 4: coating a pattern being consistent with patterns of the upper and bottom surfaces of the body on the circumferential edge of the body by heat pressing. With the pattern printed on the circumferential edge of the body, the fan blade is consistent in appearance.

Abstract: A modular adaptive performance fan may be provided for use in ventilation and cooling application. The modular adaptive performance fan may include an outer shroud, an inlet shroud, an inner hub, an impeller, a plurality of stator vane inserts, a diffuser cone, and a drive system. The modular adaptive performance fan may be configured to provide different performance and noise values desirable for different applications. Different characteristic performance curves with different BEP may be obtained by changing the geometry of the fan through the use of modular components.

Abstract: A compressor housing for a turbocharger, which is composed of a scroll piece, a shroud piece, and an outer-circumferential annular piece. The scroll piece includes a through part constituting a discharge port, a first intermediate wall surface extended from an intake-side wall surface of a scroll chamber and smoothly connected with the discharge port, and a scroll outer-circumferential part. The outer-circumferential annular piece includes an outer-circumferential annular press-fit part press fitted into the scroll outer-circumferential part, and a protruding part bent from an outer-circumference-side wall surface of the scroll chamber. The protruding part is inserted into the through part to form an inner wall surface of an intermediate part that communicates the discharge port with the scroll chamber. Then, the compressor housing is fixed to a center housing that is made of iron with high rigidity through joining parts provided at the scroll piece.

Abstract: A ventilation fan assembly suitable for installation in a ceiling or wall to provide ventilation of the adjoining space, wherein the ventilation assembly includes a fan housing and a removable flange mounting system. The flange system including at least one bracket with a receiver that removably engages an extent of the lower housing edge and a flange that extends from the receiver outward from the lower housing edge. Depending upon the positional relationship of the fan housing and the support surface(s), namely the ceiling, the flange engages an extent of a lower or upper surface of the ceiling. The bracket receiver includes at least one projection that is engages a corresponding aperture formed in the lower housing edge to removably couple the bracket to the housing. The removable flange mounting system improves the installation process and/or the sealing performance of the ventilation fan assembly.

Abstract: The invention discloses a super-silent intelligent water pump which is able to do self-priming by identifying water flow whereas no necessity of water pre-filling, which includes a pump body, a motor, an impeller, and a vibration absorbing bracket, the pump body is provided with a diffusing plate, the pump body and the diffusing plate are one-piece integrated structure, the diffusing plate adopts a sealed single outlet structure, the diffusing plate is provided with an outlet, the outlet is disposed on the outside of the diffusing plate, the water guiding hole is disposed between the inlet and the outlet. It solved the problem of heat dissipation when the machine is sealed, and, it solved the problem of vibration during use. It is energy saving and consumption reduced. It improves the service life of water pump. Meanwhile, it achieves the purpose of high efficient and super-silent operation.

Abstract: An accumulator includes a housing having a sealing face and a fluid inlet/outlet passage, a bellows fixed at least one end to the housing such that an inner space of the housing is hermetically partitioned by the bellows into an interior and an exterior of the bellows, the bellows including a bellows main body capable of expanding and contracting and a bellows cap including an annular seal holder, and a sealing member formed by covering a disc-shaped substrate with an elastic body that is opposed to and capable of being closely attached to the sealing face of the housing, the sealing member is held by a holding portion of the annular seal holder on an inner diameter side of the annular seal holder, the fluid inlet/outlet passage of the housing being closed upon a close attachment of the elastic body to the sealing face.

Abstract: A reservoir for a hydraulic system has a housing with an interior space and a fluid outlet, a hydraulic driving device coupled to a shaft extending in the housing to introduce a torque, and a separating device in the housing, for dividing the interior space into two separate sections. The fluid outlet is fluidically connected to a first section. The separating device extends along the shaft in the housing and sets the size ratio of the two separate sections by pivoting at least one first surface, coupled to the shaft, of the separating device about an axis defined by the shaft. The separating device is coupled to the hydraulic driving device such that the at least one first surface exerts a pressure on a fluid in the first section which is dependent on a surface area of the first surface and the torque.

Abstract: Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.

Abstract: This driving apparatus includes a motor drive capable of moving a movable portion toward a predetermined direction by an output of a servo motor, an air cylinder drive capable of moving the movable portion toward the predetermined direction by an output of an air cylinder, and a controller which controls the motor drive and the air cylinder drive, and the controller moves the movable portion toward the predetermined direction by using the air cylinder drive and the motor drive.

Abstract: The invention relates to a linear drive device having a housing element in which at least one drivable actuating element is arranged, a guide unit which is coupled to the actuation element and moves relative to the housing element between two stroke end positions in linear direction, a stroke limiting device, by means of which a first stroke end position and a second stroke end position of the guide unit are adjustable, wherein the stroke limiting device has a first stop and a first counterstop for setting a limit of the first stroke end position and a second stop and a second counterstop for setting a first limit of the second stroke end position, wherein the stroke limiting device has a third stop which is adapted to set a second limit of the second stroke end position adjusted with the first counterstop.

Abstract: A system and method for providing redundancy in hydraulic circuits in multi-cycle hydraulic tools is described. The problems of dysfunctional hydraulic tool due to the failure of electromechanical actuators are addressed by providing redundant actuators and associated circuitry design.

Abstract: An additively manufactured node is disclosed. A node is an additively manufactured (AM) structure that includes a feature, e.g., a socket, a receptacle, etc., for accepting another structure, e.g., a tube, a panel, etc. An additively manufactured node can include a surface with an opening to a feed channel through the node. A second surface of the node can include with a plurality of openings to an array of outlet channels. Each of the outlet channels can extend through the node and can connect to the feed channel. Tortuous paths can be used between channels created by the node surface and adjacent structures as well as node interior surfaces. These tortuous paths can be tuned to allow for optimal fluid flow processes.

Abstract: A passively controlled fluid foil has a span; and a rigid spar extending in the spanwise direction, a cellular material and a flexible outer surface defining a profile of the outer surface of the foil and encapsulating the cellular material and the spar.

Abstract: A connecting apparatus removably engages first and second articles to one another, the apparatus including a beam with a first protrusion ridge being attached to the first article, a housing with a first aperture with a slidable channel having a second protrusion ridge disposed within the housing, the first and second ridges removably engage, the housing is attached to the second article, resulting in the first and second articles being removably engaged to one another. Operationally, the beam is pushed into the housing first aperture until the first ridge contacts and deflects the second ridge with continued pushing the second ridge returns to an un-deflected state with the first and second ridges interlocked to one another, the channel is selectively slid away from the beam to disengage the first and second protrusion ridges from one another to separate the channel and the beam, thus separating the first and second articles.

Abstract: A device having a tension retaining clip for use with an annular belt or hose clamping device having radially extending ends. The retaining clip may be used, for example, for compressive emplacement of the annular belt or clamp used to secure a hose. The retaining clip may further include an extraction ring. The radially extending ends of the annular belt may each include first portions extending in radial directions from the belt, and second portions extending perpendicularly from the first portions. The retaining clip may receive and retain the second portions of the extending ends of the annular belt within a retaining cutout, which extends between a free end of the retaining portion and a retaining side surface proximal to the extraction ring. In the retained position, the annular belt may thereby have maximum expanded diameter, due to compression of the extending ends within the cutout relative to one another.

Abstract: The tension bracket is configured to receive an elongated fastener to provide a connection under tension between a secondary structure and a principal support structure. The bracket has a mounting base with two substantially coplanar base sections having complementary opposed adjacent edges. The sections define a plurality of fastener openings and a profile opening. A guide member integrally extends from the sections and has parallel walls disposed above and extending perpendicular to the base sections. A pair of laterally spaced reinforcement ribs project perpendicularly from the base sections. In one embodiment, the tension bracket is formed from a single sheet of metal.

Abstract: A tube joint structure for industrial-style furniture rack includes a tube body. The tube body is assembled by two or more half-configured housings including a first housing and a second housing. The first housing and the second housing are respectively formed by stamping two metal pieces. Two recessed portions are formed on opposite sides of the first housing and the second housing, respectively. The recessed portion of the first housing and the recessed portion of the second housing enclose an accommodating space. The tube body has at least two tube openings communicating with the accommodating space.