109results about How to "Large elastic deformation" patented technology

Devices and methods provide for ablation of cardiac tissue for treating cardiac arrhythmias such as atrial fibrillation. Although the devices and methods are often be used to ablate epicardial tissue in the vicinity of at least one pulmonary vein, various embodiments may be used to ablate other cardiac tissues in other locations on a heart. Devices generally include at least one tissue contacting member for contacting epicardial tissue and securing the ablation device to the epicardial tissue, and at least one ablation member for ablating the tissue. Various embodiments include features, such as suction apertures, which enable the device to attach to the epicardial surface with sufficient strength to allow the tissue to be stabilized via the device. For example, some embodiments may be used to stabilize a beating heart to enable a beating heart ablation procedure. Many of the devices may be introduced into a patient via minimally invasive introducer devices and the like. Although devices and methods of the invention may be used to ablate epicardial tissue to treat atrial fibrillation, they may also be used in veterinary or research contexts, to treat various heart conditions other than atrial fibrillation and/or to ablate cardiac tissue other than the epicardium.

An LGA connector is used to interconnect an LGA package and a printed circuit board. The LGA connector includes an elastomeric body with a plurality of through-holes. Metal films are formed on inner walls of through-holes and splay out around the mouths of their upper and lower openings. The metal films are formed by vacuum metallization, sputtering, chemical plating, electrical plating or PVD. The through-holes have a funnel-like shape to absorb external stresses and redirect the stress to shrink the through-hole diameters. Moreover, the metal films' elastic deformation is larger than conventional metal conductive fillers so as to improve reliability.

The invention discloses a double-reed large-turning angle flexible joint, relates to the technical field of mechanical kinematic pairs, and solves the problem that the conventional flexible hinge is small in motion range. The double-reed large-turning angle flexible joint is characterized in that a first shell is integrally formed by a 210-degree arc plate and a 90-degree arc plate; the side wall of the 210-degree arc plate and the side wall of the 90-degree arc plate are integrally connected, and the thickness of the 90-degree arc plate is smaller than that of the 210-degree arc plate; the 210-degree arc plate of the first shell is arranged outside a 90-degree arc plate of a second shell, the 90-degree arc plate of the first shell is arranged inside a 210-degree arc plate of the second shell, and a gap is formed between the first shell and the second shell; a first flexible plate is inserted into the first shell and the second shell through a first through groove and a second through groove; a second flexible plate is inserted into the first shell and the second shell through the remaining parts of the first through groove and the second through groove. The double-reed large-turning angle flexible joint is applied to the field of large-stroke precision transmission mechanisms and flexible transmission.

An assist device is provided with a spring device that generates an auxiliary driving force, by an elastic energy, acting on a joint of a leg. The spring device includes a gas spring having a cylinder and a piston. Bending/stretching motion between link members and at the joint is transmitted to the spring device through a motion transmission device that includes a link arm. The spring device is provided so that the auxiliary driving force increases as a knee bending angle θ increases until the knee bending angle θ reaches a predetermined angle, and so that, once the knee bending angle θ exceeds the predetermined angle, the auxiliary driving force becomes smaller than or equal to the driving force obtaining at the predetermined angle, effectively reducing a burden on an actuator of the legged mobile robot joint.

The embodiment of the invention discloses a self-calibration radio frequency blind plug connector and a radio frequency module. The self-calibration radio frequency blind plug connector comprises a locking end plug base, a connecting rod and a sliding-into end plug base. An outer conductor of the connecting rod is of a sleeve structure, the two ends of the outer conductor of the connecting rod are respectively provided with a first split groove elastic hole, an inner conductor of the connecting rod is a rigid needle, an inner conductor of the sliding-into end plug base is provided with a second split groove elastic hole, an inner conductor of the locking end plug base is provided with a third split groove elastic groove, the connecting rod is arranged between the locking end plug base and the sliding-into plug base, a plurality of first elastic pieces forming the first split groove elastic holes slide into an outer conductor of the sliding-into end plug base and an outer conductor of the locking end plug base, the two ends of the rigid needle are inserted into the second split groove elastic hole and the third split groove elastic hole respectively to enable signal communication to be conducted between the inner conductor of the locking end plug base and the inner conductor of the sliding-into end plug base through the rigid needle. The self-calibration radio frequency blind plug connector can achieve large position offset in the radial direction, and has large axial allowance capability.

The invention discloses a spinning spindle capable of fixing bobbins of different internal diameters. The spinning spindle capable of fixing bobbins of different internal diameters comprises a spindle blade (10), a wharve (20), a locating shaft (30) and a spindle base (40). The spindle blade (10) is composed of tile-shaped components (11 and 12). The lower ends of the tile-shaped components (11 and 12) are hinged to the wharve (20) through spring springs (50). The hollow portion of the spindle blade (10) is conical. A center rod (60) is fixed to the top face of the wharve (20) and sleeved with a conical sliding block (70). The sliding block (70) is connected with a limit device (80). The limit device (80) can drive the sliding block (70) to slide vertically along the center rod (60) and is limited. Under action of the sliding block, the tile-shaped components rotate around the hinged position until the tile-shaped components make contact with the inner wall of each bobbin, the external diameter of the spindle blade is increased through the expanded tile-shaped components, and bobbins are restrained on the spindle blade so that bobbins of different internal diameters can be fixed.

The invention relates to a revolution precision measuring device used for an inner support type shafting and connected with a hollow shafting. The hollow shafting and a CCD autocollimator are included; the hollow shafting comprises a right bearing end cap, an angular contact bearing, a locking nut, an angle sensor, an outer framework, a platform body, a moment motor and a left bearing end cap; the right bearing end cap is connected with the revolution precision measuring device used for the inner support type shafting; and the revolution precision measuring device used for the inner support type shafting comprises a leveling support, one end of the support is provided with a flat mirror, the outside of the leveling support is provided with a groove, a socket head cap screw is arranged in the groove, the intermediate circumference of the leveling support is provided with four interlaced gaps so that the leveling support is elastic to certain extent, the socket head cap screw on the leveling support is adjusted to adjust the flat mirror so that the flat mirror is parallel with the CCD autocollimator, the other end of the leveling support is provided with an inner wedge-shaped sleeve, the inner wedge-shaped sleeve is in threaded connection with an outer wedge-shaped sleeve, and each of the outer and inner wedge-shaped sleeves is a thin-wall part in which a conical surface is included and four gap grooves are distributed uniformly in the circumference. The revolution precision measuring device is characterized by simple and compact structure, low cost and convenient operations, and especially suitable for the hollow shafting whose revolution precision is hard to measure.