104results about How to "Avoid recoil" patented technology

An iris-type valve assembly for controlling a flow of fluid. The assembly comprises a base member, a rotatable member, and an elongated elastomeric valve sheath. The distal end of the valve sheath is secured to the base member and the proximal end of the valve sheath is secured to the rotatable member. At least one of the valve sheath ends includes a flange that is secured to a valve-receiving surface of the base member or the rotatable member. The base member and the rotatable member are aligned to define an elongated passageway therethrough for passage of an interventional device, and the elastomeric valve sheath is disposed along the passageway and has a longitudinal opening therethrough for passage of the interventional device. Upon rotation of the rotatable member relative to the base member the longitudinal opening of the valve sheath is selectively constrictable to comprise a seal around the interventional device. The assembly may be provided with ratcheting members to inhibit recoil of the rotatable member, and rib members along the inner surface of the valve sheath to enhance the seal provided by the assembly.

A stent in a non-expanded state has a first and second expansion column, each consisting of a plurality of expansion strut pairs. An expansion strut pair includes a first expansion strut, a second expansion strut and a joining strut that couples the first and second expansion struts at one end. Expansion strut pairs include expansion strut pair first and second corners formed where the joining strut couples the first and second expansion struts. A connecting strut column, formed of a plurality of connecting struts couples the first and second expansion columns. Connecting struts include a proximal section, a distal section and an intermediate section. The proximal section is coupled to the corner of an expansion strut pair of the first expansion column, and the distal section is coupled to the joining strut of an expansion strut pair of the second expansion column intermediate the expansion strut pair first corner and the expansion strut pair second corner.

Tubular casting processes, such as dip-coating, may be used to form substrates from polymeric solutions which may be used to fabricate implantable devices such as stents. The polymeric substrates may have multiple layers which retain the inherent properties of their starting materials and which are sufficiently ductile to prevent brittle fracture. Parameters such as the number of times the mandrel is immersed, the duration of time of each immersion within the solution, as well as the delay time between each immersion or the drying or curing time between dips and withdrawal rates of the mandrel from the solution may each be controlled to result in the desired mechanical characteristics. Additional post-processing may also be utilized to further increase strength of the substrate or to alter its shape.

The invention discloses a thunder-lightening induced solid-phase arc-extinguishing lightning arrester. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester mainly consists of a lightning arrester shell, an arc-extinguishing rotary table, an electric conduction metal plate, a starting rod, a clamping rod, an induction coil, an arc-extinguishing barrel and a counting pointer; the arc-extinguishing rotary table is arranged inside the lightning arrester shell, and a flat spiral spring for pushing the arc-extinguishing rotary table to rotate is arranged at the central position of the arc-extinguishing rotary table; the electric conduction metal plate is arranged at the upper part of the arc-extinguishing rotary table; the arc-extinguishing rotary table is provided with a plurality of arc-extinguishing gas pills in the peripheral direction; one side of each arc-extinguishing gas pill is provided with a trigger electrode and a groove respectively, one end of each trigger electrode is connected with one of trigger ends of the corresponding arc-extinguishing gas pill through a lead, and the other ends of the trigger electrodes extend out of the edge of the arc-extinguishing rotary table; and the other of the trigger ends of the corresponding arc-extinguishing gas pill is connected with the electric conduction metal plate through a lead. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester is simple in structure, reasonable in design, high in arc-extinguishing ability and stable and reliable to work, and the arc-extinguishing gas pills are changed quickly and conveniently.

Tubular casting processes, such as dip-coating, may be used to form substrates from polymeric solutions which may be used to fabricate implantable devices such as stents. The polymeric substrates may have multiple layers which retain the inherent properties of their starting materials and which are sufficiently ductile to prevent brittle fracture. Parameters such as the number of times the mandrel is immersed, the duration of time of each immersion within the solution, as well as the delay time between each immersion or the drying or curing time between dips and withdrawal rates of the mandrel from the solution may each be controlled to result in the desired mechanical characteristics. Additional post-processing may also be utilized to further increase strength of the substrate or to alter its shape.

The invention relates to pH modulated films and methods of their preparation. The film compositions include at least one component having a non-neutral pH when combined with water; and a pH modulated polymer system selected to reduce or prevent synerisis when combined with the non-neutral component in combination with aqueous media. The films demonstrate a non-self-aggregating uniform heterogeneity. Desirably, the films disintegrate in water and may be formed by a controlled drying process, extrusion process, or other process that maintains the required uniformity of the film.

Disclosed herein is a method for harvesting amylose host material comprising enzymatically treating starch after the starch has been chemically modified to uniformly insert a steric hindrance substituent.

A recording medium for recording and reproducing information by means of a head which performs information readout and writing based on magnetic principles is disclosed. The medium comprises a magnetic layer formed on a substrate and a protective layer formed on the magnetic layer. The protective layer comprises an underlayer formed on the magnetic layer and includes a material selected from the group consisting of silicon, silicon carbide and germanium. A carbon layer formed on the underlayer includes amorphous carbon containing hydrogen. The amount of hydrogen in the carbon layer is 24.7 at % or higher and 46.8 at % or lower, the thickness of the underlayer is 0.3 nm or greater and 1.8 nm or less, and the thickness of the carbon layer is 0.2 nm or greater and 1.7 nm or less. The medium exhibits corrosion resistance, sliding durability and head flying characteristics, and reduces magnetic spacing while securing reliability.

Disclosed herein is a sheet metal stamping device and method for substantially inhibiting recoil from a neutral stamped position of a scrap part region. A sheet metal stamping device for stamping a sheet metal part comprising a first die body and a second is provided wherein the first die body and the second die body are in operable communication for forming the sheet metal part from a sheet metal blank. The sheet metal part includes at least one scrap region formed therein which is prone to recoil from a neutral stamped position. The first die body and the second die body have complementary elongate bead-forming regions located for forming an elongate bead region in the scrap region. And, the elongate bead-forming regions are configured such that the elongate bead substantially inhibits recoil or springback of the scrap region from the neutral stamped position when the scrap region is severed from the part. A method of stamping a sheet metal part having at least one scrap region prone to recoil formed therein utilizing the device and severing the scrap region is also disclosed.

A method for forming a high tensile strength metal sheet (HTSMS), which is performed in a power press machine composed of a die, a punch and a blank holder, is disclosed. The HTSMS is placed between the die and punch with blank holder. A step portion appears at both an outer side of the punch and a pressing portion of the blank holder. The step portion is corresponding to a predetermined bent portion of the HTSMS. A step will be formed at an edge of the HTSMS by progressively pressing of the step portion to avoid recoil of the HTSMS after forming process.

A medical device for anchoring itself and other medical devices while channeling blood flow through the center of a vessel proximal to the device's target area to minimize debris and the pressure necessary to move blood proximal to the device. The medical device also provides superior recoil reduction capabilities. A doughnut-shaped balloon that may be inflated and deflated by increasing and decreasing pressure within the balloon, having two passages therethrough, dimensioned for blood flow and a delivery device. A method for using the device.

A door handle apparatus (10) for a vehicle, having a frame (11) and a handle (21), includes a rotational movement connecting portion (24, 51) integrally formed at one of the frame (11) and the handle (21), a contact wall portion (15, 31, 61) integrally formed at the other one of the frame (11) and the handle (21) and restricting a displacement of the handle (21) towards one end portion thereof in a longitudinal direction thereof, and a protruding portion (17, 32, 41, 62) integrally formed at the other one of the frame (11) and the handle (21), being elastically deformable when the protruding portion (17, 32, 41, 61) press-contacts the rotational movement connecting portion (24, 51) to allow the handle (21) to be slidably displaced towards the one end portion, elastically returning to an initial position to restrict the slide displacement of the handle (21) towards the other end portion thereof in the longitudinal direction when the press-contact is cancelled, and rotatably supporting the rotational movement connecting portion (24, 51) in conjunction with the contact wall portion (15, 31, 61).

The invention provides an ignition device for an internal combustion engine including an ignition circuit (6) which generates high voltage for ignition and an ignition position control portion (10) for controlling ignition position at the time of providing ignition signal (Si). In the invention, in order to avoid recoil at the time of the internal combustion engine starting, a signal generator (2) is provided that generates a first pulse signal (P1), and a second pulse signal (P2) and a third pulse signal (P3) having a different polarity from the first pulse signal (P1), and the ignition position control portion includes: start time ignition signal providing means (11) for providing an ignition signal to an ignition circuit when the signal generator (2) successively generates the pulse signals having the same polarity at the start of the engine; idling time ignition signal providing means (12) for providing an ignition signal to the ignition circuit in response to the second pulse signal (P2) when first ignition at the start is completed and a rotational speed is an idling rotational speed or less; and normal rotation time ignition signal providing means (13) for arithmetically operating an ignition position and providing an ignition signal to the ignition circuit at a crank angle position that matches the arithmetically operated ignition position when the rotational speed of the internal combustion engine exceeds the idling rotational speed.

In order to improve a touch of a key of a keyboard musical instrument by using a key actuating apparatus which actuates the key supported so as to be rotationally movable with regard to a frame of the keyboard musical apparatus, a key actuating apparatus ( 1 ) includes: a plunger ( 15 ) which is moved on an arc or curved line in correspondence with a rotational motion of a key ( 3 ); and a solenoid ( 7 ) including electro magnets ( 17 and 19 ) which are fixed to the frame and which are substantially in a cylindrical shape into which the plunger is inserted. The plunger ( 15 ) is formed in an arc or curved shape extended in a direction of a rotational motion of the plunger ( 15 ). A head end ( 15 b) arranged on the plunger ( 15 ) in a lengthwise direction is made from a magnetic body.

The invention discloses a high-strength heat-resistant aluminium alloy material and a preparation method thereof. The aluminium alloy material comprises the following components by weight: 1.0-10.0% of Cu, 0.05-1.5% of Mn, 0.01-0.5% of Cd, 0.01-0.5% of Ti, 0.0001-0.15% of C, 0.01-1.0% of Zr, 0.001-0.1% of Be, 0.05-5% of RE and the balance Al. The invention finally develops the high-strength heat-resistant aluminium alloy material by taking the high-quality melt, solid solution and phase diagram theory as the guidance, taking C as the efficient modifier, giving preference to the main alloying elements Cu, Mn and RE as formulas, reducing the temperature range of the quasi-solid phase of the alloys, solving the problems of great hot cracking tendency, low high temperature strength of the products and the like during casting and giving preference to multiple microalloying elements with low cost as formulas to create basic material conditions for cultivation and grain refining functions ofthe high temperature phase and strengthening phase in the solid solution.

The invention provides a movable lock catch and a handheld circular saw with the same. The movable lock catch comprises a locking piece seat, a rotating shaft and a connecting fastener, a via hole capable of allowing a rotating shaft to pass through is formed in the locking piece seat, one end of the rotating shaft penetrates the locking piece seat to be connected with a knob and rotates with the knob, the other end of the rotating shaft is provided with a square-head locking piece with a square head, the square head rotates with the rotating shaft to the inside of the locking piece seat or extend out of the locking piece seat when the rotating shaft rotates, and the locking piece seat is fixed on a to-be-locked device by the connecting fastener. The movable lock catch cuts forward together with the circular saw along a guide rail; when the movable lock catch is at an open position, the circular saw is allowed to move along a cutting direction of the guide rail and is prevented from leaving the guide rail to move towards a direction of a user; when backlash happens, the circular saw is limited on the guide rail by the movable lock catch. The handheld circular saw is safer and more reliable to operate.

The invention relates to a grass mowing plate for mowing lawns, bushes and the like and aims to overcome the defects that existing grass mowing plates are low in lawn mowing efficiency and difficult to mow plants such as the bushes. The grass mowing plate comprises an upper plate, a lower plate and blades, wherein the upper plate and the lower plate are mounted together, and a cavity is formed between the upper plate and the lower plate, a plurality of blade openings are formed in the lateral side of the lower plate, an edge is disposed on side of each blade, the blades are movably mounted in the cavity formed by the upper plate and the lower plate and correspond to the blade openings in the lower plate, and power drives the blades to extend out of the blade openings and rotate fast to perform mowing. When grass mowing plate is not used, the blades retract into the grass mowing plate, and cut caused by accidental touch is avoided. Compared with the existing grass mowing plates, the grass mowing plate is efficient in mowing of the lawns, the bushes and the like, and safe and convenient to operate.