749 results about "Radial pressure" patented technology

A braided stent comprises a filament having at least one circular zone and at least two non-circular zones. Embodiments of the braided stent have a proximal segment, a middle segment, and a distal segment, wherein a porosity of the middle segment is lower than, a respective porosity of the proximal and distal segments. In one embodiment, a radial pressure of the middle segment is separately controlled to be different from, e.g., less than, a radial pressure of the distal segment. In another embodiment, a stiffness of the middle segment is separately controlled to be different from, e.g., less than, a stiffness of the distal segment.

Multiple contact connector for an electrode, for example, for medical use.

The present invention relates to a multiple contact connector with reduced space requirement and weight regardless of the number of electrical contacts of the electrode, which can receive one or two electrodes, which guarantees a reliable and secured electrical connection with no risk of accidental disconnection and which is not a problem for a patient in whom the electrodes are implanted.

This connector (1) consists of male plug (6) which has elongated support (60) provided on at least one of its sides with a number of contact zones (61) equal to the number of contacts of said electrode (2) and which are aligned parallel to the axis of first cable section (4), and female socket (7) having roughly cylindrical body (70) arranged in the extension of second cable section (5) and having at least one housing (71) provided with a number of contact elements (72) equivalent to the number of contact zones (61) of said male plug (6) and capable of receiving said support (60). This connector (1) is characterized in that it has tightening sleeve (8) arranged in order to maintain support (60) in housing (71) and to exert a radial pressure of contact zones (61) on contact elements (72) in such a way as to ensure the electrical connections.

An undersea hydraulic coupling having a radial pressure-energized seal with a dovetail interfit is disclosed. The seal has a pair of flexible sealing surfaces for sealing with the male and female coupling members, and a cavity therebetween that is exposed to fluid pressure in the coupling. The outer circumference of the seal has a dovetail interfit between inclined shoulders in the female member bore and on a seal retainer that holds the seal in the bore.

The invention relates to improved drug-delivery endoprosthetic device for insertion at a vascular site via catheter placement at the site, comprising: (a) a structural member into the upper and/or lower surface of which one or more micro-deepenings are engraved and/or on which a polymer member is carried, for co-expansion with the polymer member from a contracted state to an expanded state when the device is exposed to said stimulus, (b) optionally a polymer member capable of expanding from a contracted to a stable, expanded state when the polymer member is exposed to a selected stimulus, wherein the device can be delivered from a catheter, with the structural and the optional polymer members in their contracted states, and is adapted to be held in a vessel at the vascular target site by radial pressure against the wall of the vessel, with the structural and the optional polymer members in their expanded states; and wherein the micro-deepenings of said structural member and/or said polymer member comprise a pharmaceutical composition containing one or more active ingredients selected from the group consisting of agents to inhibit or at least reduce excessive proliferation of vessel wall cells, agents to enhance the downstream perfusion of tissue, agents to promote and/or to enhance the neo-formation of capillaries, agents designed to modulate the amount or activity of coagulation factors, agents to reduce the amount of Thrombin- and/or Fibrin-formation, embedded therein for release from the member, with such in its expanded state.

A blood collection set includes a needle having a puncture tip, a hub supporting the needle and including a release member, a safety shield, a drive member, and a packaging shield disposed on the hub. The safety shield is movable from a retracted position within the hub to an extended position shielding the puncture tip of the needle. The packaging shield encloses the puncture tip of the needle in the retracted position of the safety shield. The shielding feature of the blood collection set is activated by applying radial pressure to the release member, causing the release member to release the packaging shield from the hub, and maintain the safety shield in the retracted position. Upon sufficient or partial release of radial pressure, the drive member disengages the release member from the safety shield and moves the safety shield from the retracted position to the extended positions.

Erection control system of the invention overcomes known deficiencies of vacuum constriction devices, especially cumbersomness, technical difficulties and painfulness. A penis-shaped vacuum chamber (12) adapted for unnoticeable operation under user's cloth. Removably placed penile seal (14) and a baffle (16) are adjustable to the user's penile girth and provide attachment so that the vacuum chamber hangs on the user's penis without additional support. A ribbon-shaped constriction device (26) is wound with multiple turns over each other to form a cylindrical ring, retained by the belt (28) for exerting a prearranged inward radial pressure. A transferring device with the pulling loop (40) dislodges constriction device together with removably placed penile seal and baffle onto erect penis with simultaneous release of vacuum without additional mechanisms. The removably placed penile seal, the baffle, the belt are formed from segments of a condom. A method of vacuum erection treatment with a vacuum chamber, removable seal, a vacuum source and constriction device, in which forcible slip off of the constriction device onto erected penis causes slip off of the removable seal with simultaneous vacuum release in the vacuum chamber has been proposed.

A brush holder assembly that, by design, cannot be assembly incorrectly is disclosed. The brush holder assembly includes a brush inserted into a brush holder, a block attached to the top of the brush, a spring engaging the block so as to apply radial pressure to the block and brush, and a hook pin engaging the spring and the block so as to hold the spring onto the block. The block includes a semicircular indentation that cradles a coiled portion of the spring. The block also includes a slotted hole for receiving a portion of the hook pin as the block is glued to the top of the brush. The hook pin is preferably a loop terminating at a first end that is a substantially straight pin and terminating at a second end that is a hook-shaped loop in which the straight pin end is inserted. The hook pin is formed from a spring biased metal to facilitate insertion of the straight pin end and into the hook-shaped loop end. Alternatively, a spool assembly can be used to engage the coiled portion of the spring so as to lock it in the indentation in the block. The spool assembly is U-shaped with a first upright end that supports a first spool holder and a second upright end that supports a second spool holder, the first spool holder and second spool holder each engaging and supporting an end of the coiled portion.

An intraocular lens for insertion into a capsular bag of an eye comprises: an optic; and at least one plate haptic coupled to the optic by one or more flexible connecting members. The plate haptic with flexible finger extensions is designed to engage the periphery of the capsular bag. An increase in radial pressure upon constriction of the ciliary muscle causes the rigid posteriorly vaulted plate haptics to move centrally to further increase the vitreous cavity pressure with constriction of the ciliary muscle: the optic with its thin stretchable hinge across the connecting member is then displaced anteriorly along the axis of the eye. The haptic includes a longitudinally rigid frame to restrict deformation of the haptic in a longitudinal direction while permitting deformation in a transverse direction. Furthermore, the flexible connecting members include one or more hinged straps that extend radially and/or longitudinally from the optic. The optic can move forwards and backwards, relative to both the distal and proximal ends of the plate haptics, in response to ciliary muscle contraction and relaxation with an increase and decrease of vitreous cavity pressure. Finger-like projection extends from the plate haptic to engage the capsular bag to center and fixate the accommodating lens within the capsular bag.

A system and method for testing gas migration process in the coal and rock mass are disclosed. The method includes the following steps: selecting a cylindrical coal sample, applying an axial pressure and a radial pressure to the coal sample under a sealing state, and/or increasing temperature, to desorb gas absorbed by the coal sample; guiding the gas desorbed from the coal sample by a guiding passage, detecting gas flow rate and pressure, analyzing gas composition and content, and achieving a data statistics. The method provides a theory and data basis for researching the forming and occurring process of gas outburst accident in coal mine. The system is simple and easy to use, and is suitable for migration research of the gas absorbed in the deep coal-rock mass.

A two-cavity pump having a single valve in one cavity and a bidirectional valve in another cavity is disclosed. The pump has a side wall closed by two end walls for containing a fluid. An actuator is disposed between the two end walls and functions as a portion of a common end wall of the two cavities. The actuator causes an oscillatory motion of the common end walls to generate radial pressure oscillations of the fluid within both cavities. An isolator flexibly supports the actuator. The first cavity includes the single valve disposed in one of a first and second aperture in the end wall to enable fluid flow in one direction. The second cavity includes the bidirectional valve disposed in one of a third and fourth aperture in the end wall to enable fluid flow in both directions.

The invention relates to a rolling bearing arrangement for an electromotor having a rotationally symmetrical rotor arranged rotatably inside a stator, there being provided for rotationally bearing the rotor. At least one standard rolling bearing that has an outer race which is arranged in a bearing seat in a fixed position relative to the stator and which cooperates via a rolling body arrangement with an inner race arranged on a shaft of the rotor. The bearing seat is lined with an insulation arrangement in order to avoid a flow of current between stator and rotor, the insulation arrangement having a thin, sheet-type semifinished product having insulation material resistant to the radial pressure force of the bearing.

The invention relates to a cable, in particular to a load-bearing compression-resisting cable for moving occasions and a manufacturing method thereof. When insulation wire cores of the cable are cabled and twisted, aramid tensile pieces consisting of bundled aramid and rubber thickening layers are arranged in the gaps; a liner layer made of butyronitrile rubber is extruded outside the cabled and twisted insulation wire cores; the outer side of the liner layer is coated with a shielding layer formed by braiding tin-plated copper wires; a sheath layer made of chloroprene rubber is extruded outside the shielding layer; and a layer of armoured layer which is armoured by means of metal bands in an internal interlocking manner is covered outside the sheath layer. The cable can ensure that the self weight of the cable and the weight of corollary equipment in specified range can be loaded under the condition of bending at high frequency, and the damage of external tension to the cable is reduced. Meanwhile, the load-bearing compression-resisting cable can prevent the damage of other external radial pressure to the inner side of the cable, has the advantages of super softness, high tensile, easy assembly, high physical compression resistance and simple production method, and facilitates large-scale industrial production.

A watch case comprising a rotary bezel, first and second angular positioning markings, one set secured to the bezel and the other set to the case middle and elastic means in the form of a closed-loop spring tending to place the positioning markings into engagement with one another. These markings are distributed with numbers of spacings one of which is a multiple of the other and the outlines of which extend in a plane parallel to that of the bezel. Guide means are engaged with the markings having the smallest number of spacings, in order simultaneously to exert on these markings radial pressures directed toward the other markings.

The invention discloses a downhole degassing and oil removing cyclone separation device and mainly aims to solve the problem that the downhole oil-water separation effect is limited due to existence of associated gas. The device is characterized in that the cyclone separation device adopts a twin-tangential inlet, so that the tangential and radial pressure required when a to-be-treated liquid is subjected to first-stage degassing separation is guaranteed, meanwhile, a first-stage degassing separation structure is separated from an oil removing separation structure through a barrel, and two stages of separation communicate with each other through hole opening in proper positions; the degassed treated liquid is pressurized and accelerated by a pressurizing part, and thus separation is conducted efficiently; and an oil-water separation structure adopts the two-stage pressurization and two-stage separation manners, and accordingly, the oil-water separation accuracy is improved. With the device, the downhole oil-water separation efficiency can be improved, and the feasibility and the applicability of the downhole oil-water separation system can be enhanced.

A knee pad assembly for relieving the symptoms of patellartendinitis, including a pad adapted for being positioned against and molded onto a lower leg in the region of the knee for lying in closely-conforming relation against and applying radially-directed pressure to the attachment site of the patellar tendon to the patella, to the knee joint, and to at least one epicondyle of the tibia. The pad is hardened into a rigid structure for therapeutic use and includes an initially flexible inner substrate impregnated or coated with a reactive system. The system remains stable when maintained in substantially moisture-free conditions and hardens upon exposure to moisture to form a rigid, self-supporting structure having a shape conforming to the lower leg to which the pad is molded during curing. A flexible cover encloses the substrate, and cooperates with the pad for maintaining the pad in its closely-conforming position against the lower leg.

The present disclosure relates to a catheter having a longitudinal guidewire lumen defined by a first tube configured for an over-the-wire or rapid-exchange mode of operation, the wall of the first tube provided with an expansion member that is a sub-region of the wall of the first tube provided with an expandable material. An inflation lumen extending from the proximal end towards the distal end of the shaft is in fluidic contact with the expansion member, the member being configured to expand or contract responsive to pressure in the inflation lumen. The wall of the first tube may be formed from a helically coiled wire or helically braided wire having a helix angle of 60 degrees or more which tubing is resistive to radial pressure applied in the inflation lumen.

A pressure-actuated shaft seal assembly and associated method for controlling the flow of fluid adjacent a rotatable shaft are provided. The seal assembly includes one or more seal members that can be adjusted between open and closed positions, for example, according to the rotational speed of the shaft. For example, the seal member can be configured to be adjusted according to a radial pressure differential in a fluid that varies with the rotational speed of the shaft. In addition, in the closed position, each seal member can contact a rotatable member connected to the shaft to form a seal with the rotatable member and prevent fluid from flowing through the assembly. Thus, the seal can be closed at low speeds of operation and opened at high speeds of operation, thereby reducing the heat and wear in the seal assembly while maintaining a sufficient seal during all speeds of operation.