6936 results about "Torsion spring" patented technology

Described is a prosthetic valve, comprising: an expandable stent including an inner lumen and having a first and a second end; and a spring attached to the first end of the expandable stent; wherein the expandable stent and the spring can expand radially to a desired diametric configuration in order to anchor the prosthetic valve at an implantation position in a body lumen. Related systems and methods.

A multi-use micro-sampling or lancing device (10) having an outer housing (12), a lancet holder (32) that engages a lancet (30) and constrains the lancet along a controlled and predefined path of travel during the lancing stroke, and a drive mechanism with a pair of opposed, off axis torsion springs (80,82) working in tandem to drive and return the lancet holder through its lancing stroke.

An isolator decoupler comprising a pulley, a shaft, a bushing slidingly engaged with the pulley and slidingly engaged with the shaft, the pulley journalled to the shaft by a bearing, a one-way clutch fixed to the shaft and engaged with the bushing whereby the bushing rotates in unison with the one-way clutch, a torsion spring engaged between the pulley and the one-way clutch to resiliently couple the pulley to the shaft, and the pulley non-resiliently directly coupleable to the shaft in a temporary predetermined loaded condition.

A swivel-type computer peripheral device includes a housing and a swivel rack assembly that swivels relative to the housing between a retracted position, in which a PCBA having a plug connector mounted on the swivel rack assembly is disposed inside the housing, and a deployed position, in which the swivel rack assembly is rotated outside of the housing such that the plug connector is positioned for insertion into a host computer socket. A torsion spring is connected between the housing and the swivel rack assembly and arranged to bias the swivel rack assembly either into the deployed position or into the retracted position. A locking mechanism controlled by a push button or another actuating mechanism is used to selectively lock the swinging rack in a retracted position and a deployed position.

A calculator which generally possesses a flat, compact and portable housing construction, and which includes a calculator lid mechanism which pivots a flat cover of the calculator in a predetermined controlled manner between a first position causing the flat cover to form a lid which overlies a calculator display, and a second operational position in which the cover is pivoted towards the rear of the calculator so as to form a stand for tilting the calculator into an upwardly inclined ergonomic position relative to a horizontal support surface during intended use thereof. Upon the actuation of a switch, a release mechanism enables the lid to be pivoted rearwardly in a controlled damped manner about a hinge connection, which articulates the lid to the calculator housing, under the urging of a torsion spring and damping drum arrangement constituting the lid mechanism located within a tubular bore within the hinge portion of the lid structure into an essentially perpendicular orientation relative to the rear surface of the calculator housing so as to form the stand for tiltingly support the calculator when positioned on a horizontal surface.

The present invention relates to an apparatus and method for securing a connector conduit to a hollow organ. The method comprises forming a hole in a wall of the organ; inserting a connector conduit through the hole in the wall of the organ until a flange element comes into contact with the wall of the organ, the flange element being positioned on the connector conduit; and engaging a retention means with the wall of the organ to prevent movement of the connector conduit relative to the wall of the organ, the retention means being positioned on the connector conduit. Exemplary retaining means include a plurality of retaining pins positioned circumferentially around the connector conduit, a plurality of prongs positioned circumferentially around the connector conduit, a balloon positioned on the connector conduit, a torsion spring positioned on the connector conduit, a spiral spring positioned on the connector conduit, or combinations thereof.

A latch mechanism selectively retains a first assembly to a second assembly. The first and second assemblies are configured for sliding engagement along an engagement axis. The latch mechanism includes a latch shaft mounted to the first assembly to rotate about a latch shaft axis, a torsion spring to bias the latch shaft relative to the first assembly, and a transverse latch member coupled with the second assembly. The latch mechanism is configured to automatically latch in response to the first assembly being pushed toward the second assembly. The transverse latch member interacts with the latch shaft to rotate the latch shaft in a first direction in response to movement of the first assembly toward the second assembly. Further motion of the first assembly toward the second assembly results in rotation of the latch shaft opposite to the first direction into a retention configuration that retains the transverse latch member.

A lens housing including an anti-flare aperture device in the form of a thin planar aperture member. In one embodiment, a plurality of guide pins extend from a group-3 lens element, with a compression spring on one of the guide pins to bias the group-3 lens in the direction of its optical axis. The aperture member, the position of which is defined by two guide pins, is sandwiched between the group-3 lens and the compression spring, thereby being supported. The aperture member moves backward and forward together with the group-3 lens supported by the guide pins. In a second embodiment, the aperture device is attached directly to one side of the lens elements.

A rotary pulser for transmitting information to the surface from down hole in a well by generating pressure pulses encoded to contain information. The pressure pulses travel to the surface where they are decoded so as to decipher the information. The pulser includes housing containing a stator forming passages through which drilling fluid flows on its way to the drill bit, a rotor, and a replaceable wear sleeve enclosing the rotor. The rotor has blades that are capable of imparting a varying obstruction to the flow of drilling fluid through the stator passages depending on the circumferential orientation of the rotor, so that rotation of the rotor by a motor generates the encoded pressure pulses. The rotor is located downstream of the stator and the rotor blades are shaped so that when the motor is not in operation, a hydrodynamic opening torque is imparted to the rotor that tends to rotate the rotor blades away from the circumferential orientation that results in the maximum obstruction and toward the circumferential orientation that results in the minimum obstruction. A torsion spring provides a mechanical force that also tends to rotate the rotor into the orientation that provides the minimum flow obstruction.

A cannula insertion device is disclosed. The device includes a needle carriage, a rail device on which the needle carriage is slidable, a yoke having a channel, a linkage connected to the needle carriage and extending into the channel, a torsion spring with one end connected to the linkage, and locking device for locking the torsion spring in tension and maintaining the needle carriage and the linkage in a locked position prior to activation. Upon release of the locking device, the tension of the torsion spring is released, which causes the linkage to move in the channel and slide the needle carriage along the rail device. A catheter carriage may also be provided for actuation by the linkage.

The invention discloses a folding rotor-type unmanned aerial vehicle. The folding rotor-type unmanned aerial vehicle can be folded compactly and unfolded quickly, so that the application flexibility of the rotor-type unmanned aerial vehicle is enhanced effectively. The unmanned aerial vehicle comprises a main body, four rotor arms and a landing gear, wherein each rotor arm is folded and unfolded reliably through a hinge mechanism and a limiting and locking mechanism. When the unmanned aerial vehicle is in a folded state, the rotor arms are positioned in axial grooves in the main body, a torsion spring in the hinge mechanism is compacted, and a limiting and locking piece is positioned at a locked position under the action of a reset spring. When the rotor arms of the unmanned aerial vehicle are required to be unfolded, the limiting and locking piece is driven to slide through a stirring piece along the circumferential direction of the main body, so that the rotor arms are unlocked; the rotor arms are driven to fall quickly by the torsion spring under the effect of torsional force and are limited in a horizontal state. After the rotor arms are unfolded completely, the stirring piece is released, and the limiting and locking piece is returned to the locked position under the effect of the reset spring, so that the rotor arms in an unfolded state are limited and locked.

The present invention is directed to a display mounting apparatus for mounting a flat screen television monitor or the like to a wall. The mounting apparatus provides four degrees of freedom for the flat screen display in lateral translation, tilt, swivel and pan directions. The combination of two two-link arms, counterbalancing torsion springs and friction mechanisms provides for ±20 degrees in the tilt and swivel directions.

An exercising device has a frame, a seat, two pedals, a housing and an exercising mechanism. The exercising mechanism is mounted inside the housing and has a base, two brackets, a rotating axle, a torsion spring, a flywheel, a resistance device, a pulling rope and a first grip. The torsion spring is attached to the rotating axle. The flywheel is rotatably attached to the rotating axle in a unidirectional manner. The resistance device is mounted between the base and the flywheel to provide a resistance to the flywheel. The adjusting button is connected to the resistance device with a cable to adjust the resistance applied to the flywheel by means of rotating the adjusting button. The pulling rope reels around the rotating axle. The first grip is attached to the second end of the pulling rope.

A lancing device is adapted for use in firing a lancet into the skin of a patient to acquire a blood sample and, subsequent thereto, calculating and displaying the concentration of glucose in the acquired sample. In one embodiment, the device comprises a lancet and a torsion spring coupled to the lancet through a lancet holder. The torsion spring includes inner, middle and outer rings which are concentrically configured, a plurality of activation spring arms which connect the middle and outer rings and a plurality of return spring arms which connect the inner and middle rings. In use, the plurality of activation and return spring arms can be independently transformed between energized and de-energized states using a single, button-shaped mechanism. Rotation of the mechanism is used to energize the activation and return spring arms. With the return spring arms maintained in their energized state, depression of the mechanism transforms the activation spring arms from their energized state to their de-energized state which drives the lancet from a retracted position to an extended position. Once the activation spring arms reach their de-energized state, the return spring arms transform from their energized state to their de-energized state which pulls the lancet back from its extended position to its retracted position.

The invention discloses an elastically-driven modular joint with force feedback control. comprising assembly components such as a motor stator, a motor rotor, a harmonic speed reducer and the like, so that the design flexibility and compactedness of the joint can be increased; and due to the design of an air routing shaft, the joint is convenient to route, so that the joint is more succinct, the moving range of the joint can be preferably enlarged, and the running reliability of the joint can be improved. Due to the introduction of a first absolute type angle sensor and a second absolute type angle sensor, the angle deviation between an output shaft and an output end cover can be obtained, and the angle deviation is multiplied by the elasticity coefficient of an elastic torsion spring, so that a moment value applicable to the joint can be obtained, for an input feedback value of a joint signal; and a reliable moment feedback signal can be provided for the joint, so that the elastic torsion spring can be deformed, the smoothness can be provided for the joint, and an energy storing mechanism can be further provided for the joint, and the elastically-driven modular joint is applicable to a robot, so that the interaction capability between the robot and the environment can be enhanced, and the running efficiency of the robot can be improved.

A rolling screen comprises a screen case, a take-up shaft arranged rotatably about a central axis thereof within the screen case, and a screen wound on said take-up shaft so that the screen can be wound out of said screen case. The take-up shaft is normally biased in a screen-winding direction by a torsion spring. An outer peripheral surface of the screen wound on the take-up shaft is always maintained in contact with an inner wall of the screen case, said inner wall being located in a direction of winding-out of the screen, by pulling force applied to the screen upon extension of the screen or resilient force of a pressing spring when the screen is wound out or wound in.

A stopper for a beverage container is described. The stopper includes a stopper main body that is attached to an upper opening of a beverage container main body and includes a liquid through hole on the inside thereof; and a lid that is axially supported by a hinge shaft that is provided at an end of the stopper main body, and which opens and closes the liquid through hole in a rotational manner; the hinge shaft connects a hinge portion of the stopper main body, and right and left hinge portions of the lid; a storage portion is provided on at least one of the right and left hinge portions of the lid, and the hinge portion of the stopper main body; at least one end of the storage portion in the axis direction of the hinge shaft forms an opening; and a torsion spring is stored in the storage portion, and a cover member covers the opening of the storage portion.

An isolator comprising a shaft (10), a pulley (20) journalled to the shaft on a first bushing (40) and a second bushing (50), the shaft comprising a shaft stop (12) disposed on a shaft radially outer surface (14), the pulley and the shaft rotationally moveable relative to each other, the pulley comprising an inner hub (23), the inner hub having a pulley stop (24) disposed to cooperatively engage the shaft stop, a torsion spring (30) engaged with the shaft and the pulley, the torsion spring exerting a contractive force parallel to an axis of rotation (A-A) in order to retain the pulley on the shaft, a cover member (60) fixed to the shaft, the pulley urged into engagement with the cover member by the torsion spring axial contractive force, and a rubber member (80) disposed on the shaft stop for engaging the pulley stop.

A bicycle rear derailleur includes a base member, a movable member, a torsion spring, a linkage assembly and a damping member. The base member is configured to be attached to a bicycle frame. The movable member includes a support portion and a chain guide coupled to the support portion. The torsion spring is disposed about a pivot member of at least one of the base member and the movable member. The linkage assembly is coupled between the base member and the support portion to move the chain guide between a retracted position and an extended position. The damping member is at least partially disposed between an adjacent pair of coils of the torsion spring.

A clamp includes a first member, a washer, a nut, a threaded bolt, a spring and a torsion spring. The first member may include side portions and have a first opening. The washer may include a second opening and at least one portion protruding in a downward direction from an upper surface of the washer. The nut may have an upper surface, a lower surface and a threaded opening. The threaded bolt may be disposed through the first opening, the second opening and the threaded opening. The spring may be located between a portion of the first member and the washer. The torsion spring may be located between the washer and the nut, where the torsion spring causes the nut to rotate when force is applied to an upper part of the first member.

The invention provides a wire control steering automobile road sensing simulation executing device, which comprises a support mechanism, a magnetorheological damping device, a pair of torsional springs and a torsional spring following element, wherein the magnetorheological damping device is arranged on the support mechanism, damping device shafts of the magnetorheological damping device are connected with a steering wheel shaft of a steering wheel in an automobile, the pair of torsional springs are respectively arranged on the damping device shafts arranged at both sides of the torsional spring following element, the pair of torsional springs are in coaxial installation and have opposite torsion directions, one end of each torsion spring is fixed on the support mechanism, the other end of the torsion spring is connected with the torsional spring following element, and the torsional spring following element and the damping device shafts are in a circumferential position limiting state. When the wire control steering automobile road sensing simulation executing device is adopted, the structure is simple, the energy consumption is low, in addition, the safety is high, and an active return function is realized.

In one aspect, a decoupler assembly is provided for use between a shaft and an endless drive member that is used to drive the shaft. The decoupler assembly includes a pulley, a hub and an isolator spring that is preferably a coiled torsion spring. The two ends of the spring are engageable, at least indirectly, with the pulley and the hub for the transfer of torque therebetween. At least one of the ends of the spring engages an engagement structure (on either the pulley or the hub) that includes a helical axial shoulder and a driver wall. The spring transfers torque in one direction through the driver wall (e.g. when the pulley overruns the hub), but the spring end is not fixedly connected to the driver wall. When the hub overruns the pulley, there is relative rotation between the spring and whichever of the hub and pulley it is not fixedly connected to. Accordingly, there is relative rotation between the spring end and the helical axial shoulder and the driver wall. This causes the spring end to separate from the driver wall and ride up the helical axial shoulder. This causes the spring to compress axially. The spring coils have a selected amount of spacing so that the spring can be compressed by a selected amount axially. This sets the amount of relative rotation (and the amount of overrun) that is available between the pulley and the hub in the situation when the hub overruns the pulley.

A mobile communications device comprising: a back cover, which comprises an inner surface and a sidewall. A hatch is formed in the sidewall. An ejection device is fixed to the inner surface of the back cover, and which comprises a resilient wall protruding from the surface of the ejection device, and an electromagnet. A groove member is slidably connected to the ejection device, and is aligned with the hatch, and is configured for putting SIM card. The groove member further defines a hole. A hook device is rotatably connected to the ejection device, and is positioned on the electromagnet, and which comprises a hook portion. A first elastic device is fixed to the groove member, and is configured for pushing the groove to move. A torsion spring is fixed to the ejection device, and is configured for driving the hook device to return to the first position.

Ridges and grooves are alternately formed on a platen in the direction of transporting sheets. Wave holding spurs are rotatably supported by torsion springs downstream of a recording area, and pressed against the grooves. Sheet discharge roller pairs are disposed generally downstream from the grooves. Recording sheets exhibit cockling which rises up toward a recording head due to swelling from ink, but a substantial amount of the swelling is contained in the grooves, so the cockling does not come into contact with the recording head, and further, the peak-to-peak distance of the wave shapes of the recording sheets can be reduced. Following the leading edge of a recording sheet passing the sheet discharge roller pairs, the crests of the cockling are collapsed by transporting spurs and divided between wave holding spurs and the transporting spurs, and thus the peak-to-peak distance is further reduced, consequently preventing off-target landing of ink droplets.

A fitting for a fluid pressure conduit. The fitting includes a coupling body having a substantially axisymmetrical inside surface for engaging an outside surface of the fluid pressure conduit. The inside surface has at least one substantially axisymmetrical seal formed as at least one axisymmetrical ridge on the inside surface of the coupling body. There is at least one seal land on an outside surface of the coupling body adjacent the substantially axisymmetrical seal(s). There are a plurality of anti-torsion ridges on the inside surface of the coupling body, the anti-torsion ridges having friction surfaces for resisting torsion between the fitting and the fluid pressure conduit. Furthermore, there is at least one torsion land formed on the outside surface of the coupling body adjacent the torsion ridges. The fitting also includes a ring for fitting over the coupling body, the ring being for engaging the seal land(s) to force the seal(s) into engagement with the outside surface of the fluid conduit, the ring further being for engaging the torsion land(s) to force the plurality of anti-torsion ridges into engagement with the fluid pressure conduit.

The invention relates to a drawer sliding track which comprises a fixing sliding track and a movable sliding track. A sliding seat is arranged on the fixing sliding track and is internally provided with an inner chute, a sliding arm and a swinging block; one end of the sliding arm is connected with the swinging block, and the other end of the sliding arm is inserted into the inner chute to slide; the swinging block is provided with an open groove which corresponds to a touch bar arranged on the movable sliding track; the swinging block is connected with one end of an extension spring, and the other end of the extension spring is connected with the sliding seat; the swinging block is provided with a cavity for accommodating a swinging arm; the open groove is formed between one side at one end of the swinging arm and the swinging block; the other side at one end of the swinging arm is elastically connected with the inner wall of the cavity; the other end of the swinging arm is pivoted on the swinging block; the swinging arm is a first swinging arm; the swinging block is provided with a pin shaft; the other end of the first swinging arm is pivoted on the swinging block by the pin shaft; and the cavity is internally provided with an elastic piece, a pressure spring or a torsion spring. The drawer sliding track has the characteristics of simple and reasonable structure, flexible operation, high safety, small sound during opening and closure, long service life and wide application range.

Disclosed is an apparatus for automatically compensating for the clearance of a support yoke in a rack-and-pinion steering system by using a torsion spring and a cam mechanism so that, when the support yoke generates a clearance, it is automatically compensated for without separate adjustment. Unlike conventional apparatuses for reducing rattle noise resulting from the increased gap between the yoke plug and the support yoke, the disclosed apparatus maintains a constant gap. In addition, the first cam, the second cam, and the torque spring automatically compensate for the clearance of the support yoke.

In combination with a railway freight car coupler. A coupler has a knuckle side, and includes a knuckle, knuckle pin, and an apparatus for automatically pivoting and maintaining the knuckle full open position. The improvement comprises a coiled torsion spring which is capable of continuously exerting a predetermined force. A sleeve in combination with a flange is secured to the bottom end of the knuckle pin for attaching the torsion spring onto the coupler head. A support member is attached to the knuckle and cages one arm of the torsion spring which exerts a continuous force on the knuckle to rotate and maintain the knuckle full open position. A compression spring may be employed in place of the torsion spring in combination with a locking mechanism which, rigidly secures the knuckle and knuckle pin therebetween to prevent independent movement.

A solenoid gas valve having a solenoid assembly and inlet and outlet fittings is installed inside a tube. The opening and closing of the valve is operated by the pressure difference with an aid of the magnetic field. A compression spring is attached to the support cylindrical body and held against the inlet end fitting while a moving solenoid assembly is located inside the support cylindrical body. The moving solenoid assembly that consists of a stop, a flange, a sleeve and an electrical coil, is held by a second compression spring that is attached to the inside of the support cylindrical body. A small moving magnetic rod, slides inside the sleeve of the solenoid assembly. Acted by a third compression spring, the magnetic rod seals the gas outlet through the bleed orifice on the flange of the solenoid assembly.

To provide an adequate biasing load to an endless transmission belt by biasing forces of a plurality of springs with different biasing forces and oil pressure biasing force to permit an easy adjustment. In a structure which includes an almost cylindrical plunger, a tensioner body into which the plunger is fitted, high pressure oil chambers are formed by the tensioner body and the plunger and supplied with oil pressure. Two tensioner springs, a rigid spring and a soft spring are supported by the tensioner body and are arranged in series for biasing the plunger. The plunger in its fully stretched state is supported by the serially arranged rigid and soft tensioner springs. In a condition when the plunger is pushed back from this fully stretched state by a prescribed amount or further, the plunger is supported by the rigid tensioner spring.