170 results about "Lift line" patented technology

A method and lifting arrangement for lowering and raising a single rotor blade of a wind turbine from a six-o'clock position is provided. Lifting fixtures are symmetrically installed on a hub surface about the rotor blade being replaced. Lifting lines from coordinated ground winches pass over the lifting fixtures to support the blade and attach to a blade harness. The blade harness attaches over a substantial length of the rotor blade, distributing the blade weight broadly. A tail pick crane facilitates transfer of the rotor blade between a vertical and a horizontal position stored position.

A body weight support system that monitors and controls the level of support force within a stepcycle to result in normative center of mass movement and ground reaction forces. The system comprises a harness connected to a lift line which in turn is connected to a means for advancing and retracting the lift line. A control system is configured to monitor load on the cable and to regulate lift line advancement and retraction in response to load information. The support system can be combined with a treadmill for locomotor training of a subject.

Subsea wells are drilled and completed with an offshore floating platform in a manner that allows simultaneous work on more than one well. A first well is drilled and cased. Then a tubing hanger is run through a drilling riser and landed in the wellhead housing. Then, with the same floating platform, the drilling riser is disconnected and moved to a second well. While performing operations on the second well, the operator lowers a production tree from the floating platform on a lift line, and connects it to the first wellhead housing. An ROV assisted subsea plug removal tool is used for plug removal and setting operations. Seabed separation is configured upstream of a production choke valve.

A portable apparatus for moving subjects is claimed in which a base structure has one or more rolling devices attached to facilitate moving of the apparatus. A stem structure rising from the base structure in turn supports a moveable support arm having a having pulley affixed to a distal end. A moveable lifting line capable of supporting a lifted subject ends in a fitting. A pulling mechanism is attached to the apparatus and operably coupled to the lifting line, whereby a subject secured to the fitting can be lifted and moved. In disclosed preferred embodiments, the portable apparatus for moving subjects is configured for lifting a subject without lifting movement of the support arm.

The present invention is typically embodied to exert active control of two same-shipboard cranes performing joint lifting of a payload. Sensory signals indicative of ship motion, and of luff angle and hoist line length of both cranes, are transmitted to a computer. The sensory signals are processed by the computer using a ship motion cancellation algorithm, which solves for values of the respective luff angles and hoist line lengths of both cranes, such values achieving static equilibrium (e.g., zero motion horizontally, vertically, and rotationally in the same vertical geometric plane) of the suspended payload. Inverse kinematic control signals in accordance with the mathematical (e.g., minimum norm) solutions are transmitted by the computer to respective luff angle actuators and hoist line length actuators of both cranes so that the suspended payload tends toward steadiness. Inventive control thus acts on a continual basis to significantly reduce pendulation during the two-crane lifting operation.

A method of constructing a five section telescoping aerial lift, crane or similar vehicle-mounted equipment and a lift constructed in accordance with the method having one end pivotally secured, about a horizontal axis, to the pedestal and the other end of the telescoping boom is equipped with a sheave for rigging the turret winch lift-line and/or it is equipped with a platform assembly for positioning workers, tools, or other devices at high positions, the four telescoping boom sections being extended and retracted individually by means of one hydraulic actuator for each moving section, two actuators located in the interior of the boom sections and two actuators located on the exterior of the boom sections.

Embodiments of the present invention relate to methods for calculating the aerodynamic forces and moments on fixed wing aircraft experiencing dynamic ground effects in subsonic flight. An airfoil and its trailing vortices are modeled as a lifting line with trailing vortex sheets and an image lifting line with trailing vortex sheets. The lifting line is located at a certain height above the ground and its image is located at an equal height below the ground, in order to satisfy a boundary condition of zero normal velocity at the ground. A downwash velocity at the airfoil is expressed as the sum of the downwash velocities from the lifting line and its image and is dependent on the height above the ground. The angle of attack of the airfoil is then expressed as a function its downwash velocity, the geometry of the airfoil, and a series representation of its vorticity distribution. The vorticity distribution is calculated from the angle of attack by numerical substitution. Aerodynamic forces and moments on the airfoil are calculated from the vorticity distribution. In another method, a lifting surface and image lifting surface are used to model an airfoil. These methods have particular use in autoland systems, autopilot systems and computer simulations.

An improved apparatus for latching and unlatching a load from a sling comprises a housing attachable to a load lift line extending from a crane or other similar equipment. Contained at least partially within the housing is a load engaging assembly including a latch, such as a conventional sling hook used to attach a load containing sling. The load engaging assembly further includes a latch attachment assembly and an unlatching trigger assembly. The apparatus further includes a load activated lock operatively attached to the latch attaching assembly to latch and unlatch the load engaging assembly. The load activated lock includes a support structure affixed to the housing, a latch activating member slidably mounted on the support structure and a movable locking structure positioned within the housing and operatively adjacent the latch activating member to engage and prevent latch activating member from sliding movement when a load is applied to the latch. The apparatus further includes a compression switch affixed to the housing at a position to be activated when a load of a predetermined weight is attached to the latch. The apparatus further includes at least one remote controlled relay switches electrically connecting the compression switch, or alternatively a second compression switch, to the power unit of an adjustable clutch motor having a rotating drive shaft. The apparatus also including a remote control broadcasting device to emit predetermined signals to close at least one of the remote controlled relay switches. The drive shaft is attached a reel line affixed at its opposite end to the latch activating member. The drive shaft when activated will cause the reel line retract to operatively cause the latch activating member to move and cause the latch to be positioned for releasing the sling from the latch.

Described herein are features for a riser release flaring system for parafoils and other descent flight vehicles for controlled descent and landing of the flight vehicle. The descent flight vehicle may have a payload suspended by a canopy. The descent flight vehicle may be released from a high altitude lighter-than-air (LTA) system, from another system, or may not be associated with any other flight system. The riser release auto flare system is used with the descent system, such as the parafoil, for controlled and safe landing of the payload. Riser lines are released at a controlled rate and for a fixed distance to automatically cause the payload to pull control lines to flare the parafoil and slow a descent and/or forward speed of the vehicle. The riser lines may be released in response to the descent system satisfying a landing criterion, such as altitude.

The invention relates to a manufacturing method for a lifting guide rail of a piece of side window glass of an automobile. The method comprises the following steps: selecting a midpoint connected with any point on the glass to be applied for serving as a tangent plane of the glass; extracting the characteristic line of a column B; connecting the characteristic line into a straight line by taking the midpoint in the tangent plane as an original point, and forming a normal plane of the straight line on the midpoint; projecting the characteristic line on the normal plane to obtain a projection line, forming a circle by selecting any three points from the projection line, and forming a cylindrical face; changing included angles between the midpoint of the tangent plant and the straight line of the characteristic line as well as between the midpoint of the tangent plant and the characteristic line to make intersecting lines fit the characteristic line of a boundary virtual guide rail, which is opposite to the column B, of the glass, and forming a spiral line fitting the characteristic line of the column B; forming a spiral line of the same thread pitch on another boundary according to the previous spiral line, wherein the two spiral lines are taken as lifting lines of the glass; manufacturing the glass lifting guide rail according to the lifting lines.

The invention relates to the technical field of rail transit, and discloses a rail transit track beam turnout mechanism, the rail transit track beam turnout mechanism comprises a fixed beam paved witha first traveling rail, at least two forked beams paved with a second traveling rail, a swinging beam arranged between the fixed beam and the forked beams, and a plurality of limiting devices arranged on the fixed beam and/or the swinging beam, wherein one end of each forked beam is an alignment end, and the limiting devices are used for limiting the movement of the first traveling rail at the turning position in the Y direction. The turnout mechanism provided by the invention realizes the line switching by independently arranging the swinging beams capable of swinging on the basis of simplifying the integral structure of the turnout mechanism and improving the line switching efficiency, and reduces the deformation of a variable track to the first traveling rail during the line switching,and the service life of the swinging beam and the integral stability of the turnout mechanism are improved.

The present invention disclosed a sampling device of an online analyzer of a lifting water quality, including the analyzer body, which is a load -bearing platform at the bottom of the bottom of the analyzer body.There is a water -like cup inside, and the inside sliding of the slot is connected to a fixed board. The side of the fixed board is offset with the outer wall of the water -like cup.Multiple telescopic rod connections, the fixed plate is rotated by the side of the tip club with a threaded pole. The inner wall of the placement slot is equipped with a thread port corresponding to the thread rod.The thread mouth extends outward.The present invention can make the device effectively fix and stir the collected water samples to ensure the stability of the water sample cup and the accuracy of the analysis results of the collected water samples.

The invention discloses an auxiliary device assisting a physically-challenged person without arms in putting on or taking off trousers. The auxiliary device comprises supporting mechanisms, a treading mechanism, winding mechanisms, a lifting mechanism and a self-locking device. The treading mechanism is arranged at the bottoms of the supporting mechanisms and is located between the supporting mechanisms, the winding mechanisms are arranged on the two sides of the treading mechanism, the lifting mechanism is arranged on the supporting mechanisms and is connected with the treading mechanism through the winding mechanisms, and the self-locking device can move vertically along the lifting mechanism. According to the auxiliary device, through limiting and braking of the treading mechanism, a lifting line is driven to move vertically and is used in cooperation with the self-locking device to achieve the purpose of putting on or taking off the trousers; the whole auxiliary device is convenient to manufacture and use, low in manufacturing cost and convenient to produce and popularize; due to the construction mode of the auxiliary device, the auxiliary device is higher in stability, the service life of the auxiliary device is greatly prolonged, maintenance and use cost is further reduced, and the life burden of the physically-challenged person is relieved.

In one embodiment, a self-elevating platform lift for moving objects between a first level and a vertically-elevated second level is provided. The platform lift comprises: (A) a platform for supporting the objects; (B) a plurality of lift lines for connection at the second level and for moving the platform; and (C) a motor connected to move with the platform and wherein the motor operably is connected to the lift lines for moving the platform between the first and second levels while being supported by the lift lines. In another embodiment, a lift installation is provided for moving objects between a first level and a vertically-elevated second level comprising: (A) a platform for supporting the objects; (B) a plurality of lift lines fixed at one end to extend downward from the second level for moving the platform; and (C) a motor connected to move with the platform and wherein the motor operably is connected to the lift lines for use in moving the platform between the first and second levels while being supported by the lift lines.

The invention discloses an optimization calculation method of an alignment adjustment scheme of the vertical section of a high-speed railway in operation, which takes into account the alignment control requirements of high speed railway profile and the adjustable range limits of adjustment measures, and which obtains an optimized alignment adjustment scheme by constructing a series of optimizationmodels such as a single slope adjustment optimization test model, a multi-slope section optimization calculation model, a whole slope section set range optimization calculation model and a vertical curve optimization calculation model and by optimization and solving. The method includes the following steps: S1, acquiring the profile data of high-speed railway; S 2, setting that profile control parameters of the vertical section of the high-speed railway; S3, carrying out slope adjustment optimization test of single slope section of high-speed railway vertical section; S4, carrying out slope adjustment optimization calculation of multi-slope section of high-speed railway vertical section; S5, carrying out slope adjustment optimization calculation of the whole slope section of the high-speed railway vertical section; S6, carrying out optimization calculation of vertical curve of high-speed railway vertical section. The optimized adjustment scheme obtained by the invention can meet the high-speed railway alignment restriction conditions in the adjustable range, at the same time, the ride comfort of the line can be improved to the maximum extent, and the line renovation engineering quantity can be reduced. The method can be widely used in the optimized design of the alignment adjustment scheme of the vertical section of the operation high-speed railway.

A vehicle-mounted device for hoisting and transporting big game such as deer, and more particularly a device for mounting on an all-terrain vehicle such as a quad, is disclosed. The device includes two or more spaced-apart lift lines for encircling the trunk of a big-game carcass so as to hoist and transport the carcass with the trunk extending substantially horizontally. The lift lines are attached to a common reel rotatably mounted to the vehicle. The device includes a hand crank for rotating the reel so as to spool in the lift lines and a hand-manipulable set screw for locking the reel and lift lines during transportation of the carcass.