427 results about "Constant-force spring" patented technology

The present subject matter discloses apparatus and methodologies for fabricating apparatus for harvesting power from environmentally induced vibrations. Piezoelectric devices and structures (1600) are disclosed that employ constant force spring or flexure arrangements (1512) in balanced opposition configurations (1510, 1534) to enhance the power harvesting capabilities of the piezoelectric devices (1600). Power harvesting devices and systems in accordance with the subject technology may concurrently operate as sensors in motion sensitive applications thus providing self-powered monitoring capabilities.

A canisterized satellite dispenser includes one or more of: a pair of guide rails that eliminate the requirement of a rectangular profile for the satellite; a preload system that secures the canisterized satellite during transport and launch, and releases to deploy the canisterized satellite; a constant-force spring to provide a uniform and predictable dispensing force; an external rectangular profile in each dimension; and internal support surfaces that simplify the design of canisterized satellites, particularly those with deployable components. Each canisterized satellite includes a pair of opposing flanges on a lower portion of the satellite that ride in a channel formed by the dispenser's guide rails and restraining flanges; no other support constraints are imposed. During travel and launch, the satellite flanges are held against the restraining flanges, rigidly fixing the satellite to the dispenser until the satellite is deployed.

A shade arrangement for a motor vehicle with at least one shade length and at least one roller tube for taking-up and unrolling the shade length, each side edge of the shade length having at least one flexible, flat guide strip which extends along the drawing direction of the shade and is guided in a guide. The guide contains a connecting link in which the guide strip is guided, and which has an exit gap through which the shade length emerges from the guide, the guide strip being guided such that its base surface is guided essentially parallel to the adjacent region of the shade length. The shaping and dimensioning of the exit gap and guide strip are such that the guide strip cannot emerge from the guide by itself. The shade length is connected to the roller tube via at least one constant force spring.

A wave energy converter (WEC) system includes a shell containing an internal oscillator comprised of a reaction mass suspended from the shell by an elastic spring in parallel with a constant force spring. The constant force spring provides a relatively constant force (Fc) to counterbalance the static weight of the reaction mass and reduce the extension “static” length of the elastic spring while the elastic spring exerts a force (Fes) on the reaction mass that is proportional to the displacement, x, of the elastic spring. A power take-off (PTO) device, located within the shell, coupled between the shell and the internal oscillator converts their relative motion into electrical energy.

An integrated resistance spring force assembly machine which is incorporated into an exercise machine and having a plurality of internal transverse sections with each section having respective constant force springs to output a respective magnitude of a spring resistance force, which serves as the respective force loads when in use, and a force selection mechanism which can be used to selectively activate the respective springs so that the respective force loads can be output to a combined level of resistance for an exercise routine.

A system and method for providing a tactile virtual reality to a user is present. The position and orientation of the user is utilized to generate a virtual reality force field. Forces are in turn generated on the user as a function of this force field. A six-axis manipulator is presented for providing a user interface to such a system. This manipulator provides a unique kinematic structure with two constant force springs, which provide gravity compensation so that the manipulator effectively floats.

A wave energy converter (WEC) system includes a shell containing an internal oscillator comprised of a reaction mass suspended from the shell by an elastic spring in parallel with a constant force spring. The constant force spring provides a relatively constant force (Fc) to counterbalance the static weight of the reaction mass and reduce the extension “static” length of the elastic spring while the elastic spring exerts a force (Fes) on the reaction mass that is proportional to the displacement, x, of the elastic spring. A power take-off (PTO) device, located within the shell, coupled between the shell and the internal oscillator converts their relative motion into electrical energy.

A sliding and rotating hinge module for supporting a display screen or the like, includes a bracket, a slider and a support member. The slider is capable of sliding movement relative to the bracket and the support member is capable of pivotal movement relative to the slider. A drum is rotationally supported by the bracket. A constant force spring is attached to the drum at one end and to the slider at the other end. The constant force spring is biased to wrap around the drum, the constant force spring unwrapping from the drum as the slider moves toward the retracted position. The constant force spring biases the slider toward the extended position. A damping mechanism damps the rotational motion of the drum relative to the bracket for smooth, non-abrupt movement of the slider.

Disclosed is a deep storage slot with a constant spring force comprising a storage slot housing defining a cartridge cavity and a cartridge opening, wherein the cartridge cavity is configured to store a plurality of cartridges in depth. Also disclosed is a constant force spring comprising a rolled, pre-stressed strip that exerts a constant force to resist uncoiling, the constant force spring having a first end affixed to the storage slot housing within the cartridge cavity to direct the constant force towards the cartridge opening, and at least one retention feature configured with the storage slot housing to hold at least one of the plurality of cartridges within the cartridge cavity against the constant force.

A sliding and rotating hinge module for supporting a display screen or the like, includes a bracket, a slider and a support member. The slider is capable of sliding movement relative to said bracket and said support member is capable of pivotal movement relative to said slider. A drum is rotationally supported by the bracket. A constant force spring is attached to the drum at one end and the bracket at another end. The constant force spring is biased to wrap around the drum, the constant force spring unwrapping from the drum as the slider moves toward the retracted position. The constant force spring biases the slider toward the extended position. A damping mechanism damps the rotational motion of the drum relative to the bracket for smooth, non-abrupt movement of the slider.

A gripping assembly having a first or holding end with a pair of rotatable operating elements held therein and connected to a wind assembly having a flexible, non-resilient link held by one end therein for operating a pair of gripping elements. The gripping assembly is movably mounted on a distal end of an adjustable, two part hollow body. The wind assembly is captured between a pair of lever housings and includes a constant force spring to allow the flexible, non-resilient link to be wound onto or from the wind assembly.

The invention provides a design method for a vertical constant force system. The vertical constant force system comprises a balance point constant force spring module, a gear and rack compensation module and a data acquisition and control module and is used for compensating the gravity generated in the process of ground validation of a spacecraft. The balance point constant force spring module comprises a compressed spring, a linear guide rail, linear bearings, rolling bearings, a spring jacket and connecting parts and is used for providing constant force at a balance point. The gear and rack compensation module comprises a gear and rack set, a motor and a fixing plate. When the spacecraft deviates from the balance point, the gear and rack compensation module can drive the balance point constant force spring module arranged at the lower end of the gear and rack compensation module to do acceleration and deceleration motion or uniform motion in the vertical direction to adjust force on the compressed spring, so constant force output is guaranteed. The data acquisition and control module comprises a motor driver, a control card, a high-precision tension sensor, a displacement sensor, a data acquisition card and an upper computer PC. The vertical constant force system can be used for providing the constant force in the vertical direction and compensating the gravity of the spacecraft and has the advantages being stable in operation, not prone to external interference, high in constant force accuracy and the like.

A system and method for mechanically coupling an energy harvester to strength training type exercise equipment is disclosed. An energy harvester with unwanted vibration forces is mechanically isolated from exercise equipment by a system comprising a plurality of mechanically compliant vibration isolators and a ballast mass; a flexible cord, pre-loaded with a near constant force spring is used to transmit motion from the weight stack to the energy harvester; the flexible cord has a force limiting feature to pre-excessive force from being transmitted from the energy harvester to the weight stack during an exercise motion.

A compact fluid dispenser for use in controllably dispensing fluid medicaments, such as antibiotics, analgesics, and the like medicinal agents from the reservoir of the device. Uniquely, the dispenser includes a novel bellows-type reservoir and vial fill means for filling the bellows-type reservoir with the medicament to be dispensed. The dispenser also includes a novel stored energy source in the form of a constant force spring which controllably urges the medicinal fluid from the device reservoir. Additionally, the apparatus of the invention includes a novel adjustable flow rate control assembly that is disposed intermediate the fluid reservoir outlet and the outlet port of the device for precisely controlling the rate of fluid flow from the outlet port toward the patient. The rate control assembly includes a rate selector member for selecting the desired rate of fluid flow toward the patient and a cooperatively associated flow control plate having a plurality of fluidic micro-channels which controls the rate of fluid flow toward the selector member. The rate control plate uniquely includes a priming feature for priming the various fluid passageways of the device and purging the fluid passageways of gases that may be contained therein prior to the delivery of the medicinal fluids to the administration line of the device.

Disclosed is a deep storage slot with a constant spring force comprising a storage slot housing defining a cartridge cavity and a cartridge opening, wherein the cartridge cavity is configured to store a plurality of cartridges in depth. Also disclosed is a constant force spring comprising a rolled, pre-stressed strip that exerts a constant force to resist uncoiling, the constant force spring having a first end affixed to the storage slot housing within the cartridge cavity to direct the constant force towards the cartridge opening, and at least one retention feature configured with the storage slot housing to hold at least one of the plurality of cartridges within the cartridge cavity against the constant force.

A table or desk assembly (20) includes a base having a pair of legs (24), a worksurface (22) supported by and between the pair of legs, and a rapid, counterbalanced height adjustment mechanism interposed between the legs and the worksurface for providing adjustment in the elevation of the worksurface. The height adjustment mechanism includes a pair of high lead rotatable threaded rods (32) engaged with a mating stationary threaded member (33) associated with each leg. A handle (36) is engageable with one of the threaded rods for imparting rotation to the threaded rod, and a synchronizing arrangement, such as a sprocket (38) and chain system (40), is interconnected with the other of the threaded rods for rotating the threaded rods together. A lift assist or counterbalancing mechanism applies an upward bias, such as to the worksurface, to counteract the weight of the worksurface and any loads supported by the worksurface. The counterbalancing mechanism may be in the form of a cylinder assembly (54) having a biased retractable and extendible member, which is interconnected with each of the threaded rods via a cable (66) and pulley (68) arrangement. Alternatively, the lift assist or counterbalancing mechanism may be in the form of constant force spring arrangements (76), each of which has an extendible and retractable member. A retainer arrangement (90) is interposed between the crank or handle member (36) and the worksurface, for preventing inadvertent rotation of the threaded rod and thereby maintaining the elevation of the worksurface.

A head rest system for an automotive vehicle seat movable between an extended position when the seat back of the vehicle seat is in its upright position and a retracted position when the seat back is in its lowered position. The system includes a seat base, a seat back pivotably attached to the seat base, a head rest movably attached to the seat back by a head rest attachment assembly, and a head rest movement balancing portion. The head rest attachment assembly includes a fixed portion attached to the seat back and a movable portion. The fixed portion includes a spool assembly. The movable portion includes a pair of spaced apart posts attached to the underside of the head rest and a latching assembly. The spaced apart posts are slidably attached to the fixed portion. The head rest movement balancing portion includes a pair of spaced apart constant force springs. Each of the springs has a spool attachment end and a latching assembly attachment end. A cable is provided. One end of the cable is operatively associated with the latching assembly and at the other end is attached to the seat base. A series of pulleys restrain the cable and guide its operation. The disclosed system fixes the head rest at the required height, prevents the passenger from adjusting the head rest when the seat is in an occupiable position, and retracts the head rest automatically when the seat back is folded thereby providing sufficient clearances.

The constant pressure spring support hanger frame is mainly formed from fixed frame, load coupling component, load force-transfer component and spring energy-storing component. One end of the described load coupling component is connected with spring energy-storing component. Besides, it also includes a displacement plate fixed in the fixed frame by means of motion pair, and said displacement plate is equipped with load force-transfer component and curve contour capable of retaining loading direction and acting force constant, said curve contour is connected with another end of load coupling component.

An electromagnetic shielded door with constant force spring perimeter seal may include a door panel and door jamb. The door panel may include a sealing member around a perimeter of an inside face of the door panel. In certain embodiments, the sealing member may have a raised sealing surface. The door jamb may have at least one spring containment member along an inside perimeter facing the door panel. A spring mechanism may attach to the at least one spring containment member. The spring mechanism may include a plurality of continuous force flat torsion roller springs attached to at least one spring containment member which may be part of a channel. The raised sealing surface may engage with the plurality of continuous force flat torsion roller springs on the at least one spring containment member of the channel.

A toy dart magazine apparatus that includes a housing divided into a drum portion and a clip portion, and a wheel structure rotatably mounted to the drum portion. The wheel has four portions, two spaced apart portions having peripheral recesses for receiving the darts and storing them until they are “fired” by a launcher to which the dart magazine apparatus is mounted. A third portion having a smooth circumference and a smaller diameter than the two recess bearing portions wherein the third portion separates the two spaced apart portions. The fourth portion of the wheel has a larger diameter than the two recess bearing portions and is positioned adjoining one of the two recess bearing portions for aligning the darts relative to the wheel. The wheel also includes an opening in the third portion leading to a chamber in a hollow support of the wheel. A spring-biased knob is mounted on a shaft that also mounts the wheel. Both the knob and the wheel have axially align protrusions that may engage each other to allow the wheel to be rotationally adjusted to correct any jam or misalignment of the darts stored on the wheel. A flexible arm and a pusher structure are also included with the magazine apparatus and are connected to a constant force spring, where the flexible arm and a portion of the constant force spring are lodged in the chamber of the hollow support during a dart loading process of the wheel, and the constant force spring uncoils when the wheel is rotated during the loading process. The constant force spring biases the wheel to feed the darts from both the drum and the clip to a firing position at the end of the clip located in the launcher, but the constant force spring is insufficient to discharge the darts when the magazine is not connected to the launcher.

The invention discloses a solid pulse plasma thruster with high propellant utilization rate and a working method, and belongs to the technical field of aerospace propulsion of micro-satellites. The solid pulse plasma thruster with high propellant utilization rate comprises a constant-force spring, an upper insulating plate for fixing a propellant, a semiconductor spark plug, a permanent magnet for increasing impulse bit, a cathode plate, a permanent magnet for increasing specific impulse, an anode plate, a high-voltage power supply, a main spark-gap capacitor, a diode, a lower insulating plate for fixing the propellant and a solid propellant; gas storage cavities for reducing the forward movement speed of neutral gas are respectively formed in the cathode plate and the anode plate; the distance between the cathode plate and the anode plate is increased on the rear sides of the gas storage cavities; tail ends, which are close to a nozzle, of the cathode plate and the anode plate are parallel to each other; the permanent magnet for increasing the impulse bit is added in the direction which is opposite to the direction of a self-inductance magnetic field; and the permanent magnet for increasing the specific impulse is added in the direction which is the same as the direction of the self-inductance magnetic field. The propellant utilization rate of the solid pulse plasma thruster can be increased. The solid pulse plasma thruster has the advantage of low cost, and is suitable for being used as a main thruster of a micro-nano satellite or an adjusting device of various large satellites.

The invention relates to a machine core structure of a heavy load holder. The heavy load holder comprises a base, a machine core, a driving mechanism, a shell and a protecting cover; an elastic fixing part connected with the horizontal drive shaft and the inner wall of the shell is fixed on a horizontal drive shaft; the position of the horizontal drive shaft is limited by the elastic fixing part so that a horizontal worm screw and a horizontal worm gear keep close fit and keep stable running in fit. The tension generated by a constant force spring effectively solves the machining and abrading errors of the worm gear and the worm screw and can overcome the machining error of the horizontal worm gear and the horizontal worm screw and the abrading error after the horizontal worm gear and the horizontal worm screw run for a period of time so that the occlusal surfaces of the horizontal worm gear and the horizontal worm screw keep coincided all the time in the driving process; therefore, the error clearance of the worm gear and the worm screw is effectively solved, the heavy load holder smoothly runs on the horizontal direction, the stability of a camera in rotatably working is ensured, and the quality of horizontal images of the camera is better.