An inflatable toroidal-shaped balloon for medical use is provided with a central opening traversing the balloon in an inflated state. The balloon is useful to achieve larger outer diameters than conventional balloons.
A method for manufacturing a heat pipe having an enlarged portion includes the steps of: preparing a hollow tubular material having a uniform outer diameter; forming the tubular material with an enlarged portion having a different or larger outer diameter by narrowing or enlarging the tubular material; arranging a capillary structure into the tubular material; filling a working fluid into the tubular material after sealing one end of the tubular material; sealing the end to form a heat pipe after performing a degassing operation; and pressing the enlarged portion obtained in the previous step to form a flattened enlarged portion on the heat pipe.
A tube for sample collection and sample processing in a tube rack includes an upper section, an intermediate section, and a lower section. The intermediate section connects the upper section and the lower section of the tube, and an inner diameter of the intermediate section can decrease from top to bottom. A fastening means can fix the tube in a tube rack. The tube can include a pierceable tube cap sealing the tube, and the tube rack can be configured such that the tube may be pulled off the tube cap by a centrifugation force. The tube can include a volume of density gradient medium covered by a separating gel to enhance sample separation.
An apparatus for compressing empty containers, in particular of beverage bottles or beverage cans made out of plastic, in particular out of polyethylene terephthalate PET, or tin plate. The apparatus has a cutting and pressing unit as well as means for driving and for controlling the cutting and pressing unit, wherein the cutting and pressing unit contains at least two cooperating, oppositely rotating rollers disposed at a distance relative to each other with respect to their rotation axes, wherein each roller has several disks in each case disposed towards each other with an axial distance (free space). According to a special further development it is proposed that at least in the operating region of the two rollers there are disposed axially next to each other a first working region for a compressing of containers made out of plastic and a second working region for a compressing of containers made out of metal.
An optical fiber holder includes a holder main body, a V-groove which is formed on an upper surface of the holder main body and accommodates a first optical fiber, a recessed groove which is formed on a same straight line with the V-groove and accommodates a second optical fiber having a coating portion with a larger outer diameter than the first optical fiber, and an abutting portion which is provided on an end portion of the recessed groove on an opposite side to the V-groove and includes an opening portion which has a smaller width than the recessed groove. When the second optical fiber is accommodated in the recessed groove, a fiber core wire of the second optical fiber protrudes to an outside via the opening portion and an end portion of the coating portion of the second optical fiber abuts on the abutting portion.