摘要:
A medical device includes a polymer scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the balloon by a process that includes heating the scaffold to a temperature below the polymer's glass transition temperature to improve scaffold retention without adversely affecting the mechanical characteristics of the scaffold when later deployed to support a body lumen. Additionally, before crimping begins the scaffold is placed on a support by an alignment carriage and deionized to remove any static charge buildup on the scaffold before placing the scaffold within the crimping mechanism.
摘要:
A medical device includes a polymer scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the balloon by a process that includes heating the scaffold to a temperature below the polymer's glass transition temperature to improve scaffold retention without adversely affecting the mechanical characteristics of the scaffold when later deployed to support a body lumen. Additionally, before crimping begins the scaffold is placed on a support by an alignment carriage and deionized to remove any static charge buildup on the scaffold before placing the scaffold within the crimping mechanism.
摘要:
A vacuum brake booster of which the housing (1) is traversed by tubes (20) for fixing screws to pass through. Each tube (20) is fixed by crimping via the back end (20AR) thereof into an opening at the bottom (11). The back end (20AR) has a peripheral fold (24) forming a rear groove (241), and an extension (25) of the tube (20) beyond the peripheral groove (241) folded outwards and forming a crimping lip. The bottom (11) has an opening (111) bordered by a hollow crown (112) having a shape complementary to that of the groove (241), and the extension (25) is folded against the hollow crown (112).
摘要:
A semimanufactured product of a stopper (31) includes: a plate-shaped bridging portion (33); a first curved portion (35) extending from one end portion of the bridging portion (33) integrally; and a second curved portion (37) extending from the other end portion of the bridging portion (33) integrally, and an entirety of the semimanufactured product is formed in a C-shape. The first curved portion (35) includes a first locking part (41) at the end portion. The second curved portion (37) includes a second locking part (51) that engages with the first locking part (41) at the end portion. The first locking part (41) includes a convex-shaped convex portion (43) and a pair of receiving portions (45) positioned so as to sandwich the convex portion (43). The second locking part (51) includes: a concave-shaped concave portion (53) which can accommodate the convex portion 43; and a pair of projecting portions (55) positioned so as to sandwich the concave portion (53). Each of the pair of projecting portions (55) includes a protruding portion (57) which protrudes from a tip portion of the projecting portion (55) toward an opening (54) of the concave portion (53). The convex portion (43) includes constricted portions (44) in base end portions of the convex portion.
摘要:
A prosthesis (100) is compressed in a device (10) by being wrapped in a flexible sheet (60) inside a cartridge (12), the opposite edges of the sheet being led out through a longitudinal slit (40) in the cartridge and attached respectively to the outer surface of cartridge (12) and the inner surface of a surrounding shell (50); subsequent relative rotation of the shell (50) pulls the sheet (60) outwardly of the cartridge causing compression of the prosthesis. Stop projections (72,73) are provided to limit the rotation to less than one complete revolution. End pieces (14,16) of the device have tubes (22,32) aligned with the prosthesis when compressed and a pusher rod (90), Fig 4 , is pushed through the tubes to push the prosthesis into an introducer sheath (36). The or each end piece (14,16) may incorporate a ratchet mechanism (120) to prevent rotation in the wrong direction.
摘要:
An externally splined clutch hub and method for making the same is disclosed wherein a flat circular metal perform (10) is contacted with a single forging die to simultaneously cold forge a centrally disposed tubular neck (14) extending outwardly from one side of the perform and simultaneously a splined annular ring (16) at the periphery of the perform and extending outwardly from the other side of the perform wherein the tubular neck and the annular ring are coaxial.
摘要:
A method for manufacturing a combined driveshaft tube and yoke assembly includes the initial step of orienting a first component having a first wall thickness and a second component having a second wall thickness to define an overlap region. The first and second components may have the same or different wall thicknesses, may be formed from the same or different materials, and may have the same or different lengths. Portions of the first and second components are deformed to provide the overlap region with a third wall thickness that is the sum of the first wall thickness and the second wall thickness. Lastly, a pair of yoke arms having respective openings therethrough is formed in the overlap region to provide a combined driveshaft tube and yoke assembly. A pair of combined driveshaft tube and yoke assembly can also be manufactured in accordance with this method.