Abstract: A stentless prosthesis is made completely from material, for example bovine pericardium, other than valve material. A projection of the valve sleeve allows reparatory operations on surrounding tissues.

Abstract: A slender motor for a cannned motor pump in which a motor rotor is provided between a pair of bearings on a rotor shaft, and a motor stator is provided throuth a path for a cooling and lubrication liquid around the motor rotor, whereby a ratio of axial length to diameter of the motor rotor is so set as to permit the cooling and lubrication liquid passing through the path to provide a bearing effect on the rotor shaft.

Abstract: A multistage canned motor pump comprising a pump section including a plurality of pump chambers and a motor section behind the pump section, both the sections having in common a single rotation shaft, and further a balance disk between the pump and motor sections, wherein an external circulation system is provided so that a part of a treating liquid discharged from a last stage pump chamber is circulated from a front rotor chamber through a pressure chamber accommodating the balance disk to a rear rotor chamber while the remaining part of the treating liquid is supplied to a rear bearing section for lubrication of the bearing section and further circulated through an external pipe to a pump section port for cooling of the motor section, and wherein an annular balance sheet is provided a verge at a high pressure side of the balance disk in the pressure chamber to control a flow rate of the treating liquid to thereby reduce a pressure of a circulation flow of the treating liquid toward the motor section.

Abstract: A data processing system is disclosed that establishes and administers charge accounts, including both funded and post-funded accounts. In one embodiment, the system of the invention establishes charge accounts for all of the patients of a medical professional, with creditworthy patients having funded accounts, and patients who are not creditworthy having post-funded accounts. Each patient is issued a charge card which can be used to pay for medical services at participating providers. When a patient with a funded account charges medical services, the doctor is paid promptly and the servicing company proceeds to collect payment from the patient. For post-funded accounts, the doctor is not paid until funds are received from the patient.

Abstract: A solid impeller is disclosed having a disk-shaped impeller body having an inlet section extending along the impeller axis of rotation. A plurality of discharge passages extend radially and having inlet and discharge ports. The inlet port has an opening verge face which is oblique to the rotational axis. The solid impeller may also comprise a disk-shaped impeller body having an inlet section extending along the axis of rotation of the impeller and plural discharge passages extending radially. It further has inlet and discharge ports which have a tapered shape so that the section area of the discharge passage is gradually reduced in the outward direction. The thickness of the body is also gradually reduced in the outward direction. The solid impeller may also comprise a cylindrically-shaped center body and plural arms on a peripheral surface of the body. These extend radially in an outward direction from the body and include a discharge passage which extends along a longitudinal direction of the arm.

Abstract: An apparatus for purifying laser gas, in particular for excimer and F.sub.2 lasers, employs liquid nitrogen (12) for freezing impurities out of the laser gas, the freeze-out temperature being set by means of the pressure above the surface (14) of the liqid nitrogen (12).

Abstract: A device for sequentially loading tubes in a spinning machine wherein the tubes are fed by a tube orientating device. The device disclosed includes a duct for guiding the fall of the tubes and provided at its lower end with a shutter which loads one tube at a time onto the pegs of the spinning machine doffing belt by withdrawing it from a stack of tubes accumulated within the duct to form a buffer stock.

Abstract: A bottle carrier case for transporting bottles of beverage having locating means on the bottom of the case for stably stacking the case and having openings provided in the concavities for easily removing the case from overlying bottles.

Abstract: A hinge made of a unitary structure which has two main projecting members and a space therebetween. The hinge is able to flex and has little biasing toward the open or closed positions.