Abstract: A thermally coated component is disclosed. The thermally coated component has a frictionally optimized surface of a track for a friction partner, where the surface has pores. The pores have an entry rounding, the slope of which, as a ratio of the depth of the entry rounding to a longitudinal section of the surface or parallel to the surface, has a value of more than 2.5 ?m/mm.

Abstract: A thermally coated component that has a frictionally optimized surface of a raceway for a frictional counterpart. The frictionally optimized surface has a theoretical oil retention volume VOil of 10 to 800 ?m3/mm2, which can be pre-determined by a component coating surface simulation. A method for the component coating surface simulation of a thermally coated component is furthermore disclosed, with parameter determination for surface structures of the component coating surface, wherein a parameter simulates a function between the component coating surface and the frictional counterpart.

Abstract: A relatively economical process allows producing sintered shaped parts, such as sliding sleeves in motor vehicle transmissions. Open-pored undercut surfaces are formed at an internal toothing by hypocycloid milling of the part prior to its final hardening.

Abstract: A sliding collar has claw internal toothing and teeth projecting from at least one of the end surfaces. The individual teeth have lateral surfaces configured as lateral surfaces of a cone segment or as lateral surfaces of a cone segment and one or more truncated-cone segments. The novel geometry of the lateral surfaces which extend outward from the root circle results in both manufacturing technology and functional advantages over sliding collars with known tooth geometries.

Abstract: A sintered selector or sliding sleeve, or gear shift sleeve, has internal claw toothing. The individual teeth are delimited on their ends with secondary surfaces having ends that extend radially inward and outward from the root circle of the inner tooth surfaces. The novel geometry of the secondary surfaces extending radially outward from the root circle provide advantages in the manufacture of such selector sleeves by powder metallurgy, compared with those having prior art tooth geometries.

Abstract: A method for producing porous structures in which a liquid or pasty mixture of substances is brought at least partially to solidification and subsequently freeze-dried.

Abstract: To improve the thermal transmission during freezing processes it is proposed that the goods to be cooled and a pre-cooled body of high thermal capacity be pressed against each other. Improved thermal transmission is also attained with a device comprising a holding device which during the cooling process holds the goods to be cooled essentially in a non-deformable way, allowing direct contact between the coolant and the goods to be cooled. Preferably, vertically aligned channels are arranged between the holding device and the goods to be cooled, with coolant flowing in said channels.

Abstract: The inventive device consists of a disk which can be rotated around a central axis, a wobble pin which is mounted in the disk so that can rotate around an axis which is arranged at an angle in relation to the plane, of said disk, a swivel pin which is secured to the wobble pin at an angle in relation to the axis thereof, and a fastening device which prevents the swivel pin from rotating around the axis of the disk. This mechanism forms a gear enabling a rotational unidirectional movement to be translated into a back-and-forth movement in applications where limited height is available. The preferred area of application is in implantable blood pumps.

Abstract: A blood pump having a motor housing and a pump housing which are rigidly connected to one another in an axially spaced relationship. Both housings are of substantially the same diameter and are sized to enable the pump to be introduced via catheter through the body's blood-vessel system. The impeller is mounted in the pump housing on a longitudinally and radially acting bearing designed as a point-support bearing. To avoid oscillation of the impeller, it is fitted with an alignment device which may have a hydrodynamic or mechanical action. Rotation of the motor is transferred to the impeller via a magnetic coupling.

Abstract: The blood pump (BP) has an elongate tubular pump housing (10) wherein a motor (16) is arranged that drives a pump impeller wheel (22), the pump housing having an inlet (12) at one end and an outlet (18) at the opposite end. The motor (16) comprises a motor housing (15) sealed off against the blood flow. The pump impeller wheel (22) is located at the end of the motor housing (15) facing the inlet (12) and, together with a transition portion (13) of the pump housing (10), forms a rotary pump flown through diagonally, which creates an axial flow flowing around the motor housing (15). Here, the blood flow exclusively flows between stationary parts, thereby reducing the risk of blood decay caused by shear stresses.

Abstract: A magnetically-driven centrifugal blood pump includes a housing and an impeller mounted for rotation within. The impeller includes a generally disk-shaped base plate and a plurality of curvilinear vanes extending axially upward therefrom. The vanes project radially outward from the base plate approximately one-third of their curvilinear length. The housing includes a rear wall spaced from the impeller base plate across a constant gap, with a sloped transition wall surrounding the rear wall and joining it to a peripheral wall. A tangential outlet is provided in the peripheral wall. A front wall extends inward from the peripheral wall with a slight conicity to an axial inlet. The vanes each have a front edge which slopes away from the front wall in the radially outward direction to provide a widening gap therebetween. The vanes have inner ends which together define a vane-free inner region below and slightly larger than the inlet.

Abstract: In a pump housing (10), the blood pump comprises an impeller (13) with a flat plate (30) and blades (34) projecting therefrom. The impeller (13) is supported between balls (18,20) forming an axial sliding bearing. The front wall (35) and the back wall (14) of the pump housing extend substantially parallel to the plate (30) of the impeller (13). The height of the blades (34) linearly decreases with increasing radius so that the gap between the front wall (35) and the blades (34) increases outwards. Since the circumferential speed increases as well, the shearing rate remains constant. Between the plate (30) of the impeller and the back wall (14), a gap of constant width is provided, in which secondary flows are produced, thereby avoiding dead water zones.

Abstract: A blood pump housing (43) accommodates at least one piston (21a,21b) driven by a coupling point (19a,19b) on a triangular closed hypocycloidal path (Z.sub.a, Z.sub.b). The piston (21a,21b) is provided for periodically pressing and releasing a blood chamber (37a,37b). One of the corners of the triangular closed hypocycloidal path (Z.sub.a,Z.sub.b) is directed towards the piston (21a,21b), so that the piston movements substantially consist of three periods, i.e. an advance stroke period, a return stroke period and a stationary stroke period.

Abstract: An apparatus for determining the partial pressure of a gas dissolved in a fluid which includes a catheter consisting of a double bored coaxial catheter having an outer tube and a spaced coaxial inner tube, the outer tube being permeable to the gas being measured, together with a pump for delivering a continuous flow of a carrier fluid into the space between the inner tube and the outer tube. A measuring device is located downstream of the catheter for determining the partial pressure of the gas in the carrier fluid. A mass transfer unit receives the gas after the measuring device and is arranged to bring the partial pressure of the gas in the carrier fluid to a predetermined value.