Abstract:
A catheter assembly comprises a sheath, which includes a side wall enclosing an interior bore, a distal region, and an opening in the sidewall. The assembly also comprises a bendable catheter tube, which is carried for sliding movement in the interior bore. The catheter tube has a distal portion. The assembly further comprises a coupling, which joins the distal region of the sheath and the distal portion of the catheter tube. The coupling causes bending of the catheter tube outwardly through the opening, in response to sliding movement of the catheter tube within the interior bore toward the distal region of the sheath.
Abstract:
A bi-stable hook component of a touch fastener can bend into, and remain in, a stable concave position. Another stable position enables initial engagement with a mating component (e.g., a loop component). The concave position applies engagement-enhancing tension to the engaged loops, and in some cases forces end portions of the hooks into close proximity with one another to secure the fastening and to produce a curved touch fastener that, as engaged, can better conform to an underlying curved surface, such as the contour of a wearer's body. Absorbent articles having such a bi-stable fastening system are also disclosed.
Abstract:
A molded polypropylene having an excellent balance among various material properties including impact resistance, transparency, gloss, molding shrinkage, and whitening resistance. The molding is constituted of a material comprising a resin composition comprising 10 to 60% by weight crystalline polypropylene (matrix) and 90 to 40% by weight propylene/&agr;-olefin copolymer (domains). The copolymer has been dispersed in the crystalline polypropylene to form domains elongated in the direction (MD) in which the resin composition flows during molding. Each domain is connected to one or more other domains at least at one site (connecting chain).
Abstract:
A bracelet made of links has two rows of side links (1) forming the edges of the bracelet and at least one row of central links (2). The side links (1) have each one two blind bores (3) opening on the inner side directed towards the central links (2) and the central links (2) are traversed each one by two bores (6) extending therethrough. Free pins (7) are placed freely but without any looseness in the bores (3,6) of the lateral links (1) and of the central links (2) and they have, at each one of their ends, a groove (10). The side links (1) have, opening on their lower face, at least one recess (5) giving access to the grooves (10) of two adjoining pins (7). Blocking members (8) are designed for being inserted into the recesses (5) of the side links (1) and they include retaining members (9) co-operating with the grooves (10) of the pins (7).
Abstract:
A left atrium ablation catheter (4), including a sheath (8) and a deflectable electrophysiology catheter (10) housed within the sheath, is used to ablate coronary tissue at a target site within the left atrium (LA) of a heart. The electrophysiology catheter has ablation electrodes (24) along the tip (10). The ablation catheter is introduced into the right atrium (RA) through either the superior vena cava (SVC) or the inferior vena cava (IVC). The distal open end of the sheath is guided through a punctured hole in the interatrial septum and into the left atrium. The distal end (20) of the sheath is either precurved or is steerable so the electrode tip can be directed to the coronary target site in the left atrium. The electrode tip is sized and configured to create the desired lesion at the target site without movement of the electrode tip.
Abstract:
A steerable catheter is disclosed which includes a complexly curved proximal section shaped to seat the catheter relative to an anatomical feature within a patient. The catheter also includes a flexible intermediate section which has comparatively greater flexibility than other sections of the catheter. The flexible intermediate section bends in response to forces applied by an attached steering device and substantially all of the flex in the catheter may be contained within the flexible intermediate section. The catheter further has a pre-shaped distal section which is urged into contact with tissue within the patient when the flexible intermediate section flexes. In a preferred embodiment, the distal section supports a plurality of ring electrodes and is shaped to generally correspond to the physiology of a wall of the heart.
Abstract:
A pliant, controllable contour control surface comprising a first flexible facesheet formed to a first initial contour of the control surface, and a second flexible facesheet formed to a second initial contour of the control surface. The first and second facesheets each have a set of prestrained shape memory alloy tendons embedded therein, extending from a leading edge to a trailing edge of the control surface. Each set of the shape memory alloy tendons is separately connected to a controlled source of electrical current such that tendons of the first and second flexible facesheets can be selectively heated in an antagonistic, slack-free relationship, to bring about a desired modification of the configuration of the control surface. A computer based control system is utilized for maintaining a constant temperature of the antagonists to establish conditions conducive to the stress induced transformation from austenite to martensite, accomplished by causing constant current to flow through the antagonists. Proportional/integral (PI) control is utilized in connection with the opposing shape memory tendons.
Abstract:
A terminal bushing having integral overvoltage and fault current protection includes an insulator having an upper and a lower chamber. Nonlinear resistors are disposed in the upper chamber between a top terminal and an intermediate terminal which are mounted on the insulator. The top terminal, the nonlinear resistors and the intermediate terminal form a first current path through the bushing. The bushing also includes a pair of mounting arms which support a current limiting dropout fuseholder. The fuseholder is disposed in series between the top terminal and a bushing stud which is retained in the lower chamber of the bushing body. A second current path through the bushing is thus formed by the top terminal, the fuseholder and the bushing stud.
Abstract:
A surgical probe, and procedure using the same, enabling a surgeon to cut body tissue by delivering energy, such as a laser beam, to the body tissue and without removing the instrument to cauterize the body tissue by direct application of electric current. The surgical probe includes an elongated member having a fiber optic positioned on a longitudinal axis of the elongated member and pair of elongated electrodes that span an entire length of the elongated member. The elongated electrodes slide lengthwise in a direction parallel to the longitudinal axis. During cutting procedures, the distal ends of the electrodes are in a retracted position not beyond the distal end of the elongated member, and during cauterization procedures, the distal ends of the electrodes are in an extended position beyond the distal end of the elongated member. In a preferred embodiment, the distal ends of the electrodes are pre-bent so as to converge toward each other as they are extended beyond the distal end of the elongated member.
Abstract:
A current responsive latching apparatus may be employed in a dropout fuseholder or other electrical component for retaining the component in a current-carrying position and disconnecting and isolating the electrical component upon the occurrence of an overcurrent of a predetermined magnitude. The apparatus includes a current path through the component, including a current-carrying stud or conductor, a portion of which extends outside the component for releasably engaging a support member. A latching apparatus, which may include an actuating member of memory allow or a bimetallic material, engages the conductor to retain the support member in a supporting position beneath the electrical component. The apparatus may further include a heater element in the current path to ensure that the actuation member is heated to the temperature necessary to cause it to change shape and release the conductor upon the presence of an overcurrent.