Abstract: A prestressed roller bearing and method of assembly whereby the inner race, plurality of roller elements, and outer first assembled in an unprestressed manner. Then a tapered collar is inserted into the inner race, stretching the inner race to prestress the roller elements. This final assembly can be tested in the factory. Then the bearing is shipped and installed onto a conventional supported shaft outside of the factory, in the manner of an unprestressed bearing without special installation procedures or shafts or equipment. This provides a ready-to-mount prestressed roller bearing, factory tested and standardized, without damage from press-fit assembly of the inner race into the roller elements.

Abstract: A pre-stressed radial thrust frictionless bearing device comprising an annular inner race with a certain outer radius, an annular outer race with a certain inner radius, and an array of bearings rolling between the inner and outer races. Each of the bearings has a circular cross section of a certain diameter prior to assembly. Each of the bearings is pre-stressed into an oval or elliptical cross section following assembly. The device is assembled by heating and/or cooling parts of the device to temporarily change their dimensions to permit assembly without pre-stressing, and then permitting all the parts to return to the same temperature and corresponding dimensions causing pre-stressing.

Abstract: A disposable device for dispensing an aerosol spray medicament to the lungs of a patient from a stanardized aerosol dispenser activated automatically by the inhaling of the user. The device has only one moving part, and no power requirements. The device may be used alone or within a respirator, by asthmatics, pulmonary cancer patients, and others. The device comprises a body having an outwardly extending nozzle, a receptacle formed within the body for receiving the dispenser, and an activator positioned within the body being mechanically interactive with the inhalation by the patient. Vents are formed in the body for carbureting air into the nozzle. A fixator is provided for detachably affixing the dispenser in position within the receptacle. Specifically, the fixator is a cap that is threadedly connected to the body and has an interior area suitable for accommodating the dispenser. The activator comprises a diaphragm positioned within the body.

Abstract: An improved non-resuable syringe comprising a barrel having one open end and one restricted end through which a liquid may pass, a piston is slidably positioned within the barrel, a shaft is positioned so as to be freely slidable within the barrel and has one end extending beyond the open end of the barrel, a connector has one end engaging the piston in rotatable relation thereto, and a guide means as formed on the exterior of the shaft so as to receive the other end of the connector and causing the connector to disengage from the shaft. The piston has an orifice at one end for receiving an arrowhead-shaped portion of the connector. The connector has a forked portion having inwardly formed pins for engaging guide slots in the exterior of the shaft. The shaft includes a cylindrical member connected to the shaft and a Z-shaped groove configuration formed on opposing sides of the cylindrical member. During use of the syringe, the pins on the connector follow the pathway of the formed groove on the connector.

Abstract: A guard assembly for a hypodermic needle comprising a hinge guard portion. The hinge is connected to the hypodermic needle at a location distal the pointed end of the needle. The guard portion is attached to the hinge such that the guard portion is movable relative to the needle. The guard portion has a receiving slot extending longitudinally therethrough for receiving the pointed end of a hypodermic needle. The receiving slot opens through the wall transverse to the longitudinal axis of the guard portion. The hinge is a flexible strip connected at one end to the needle and at the other end at the guard portion. The guard portion is a cylindrical member having a longitudinal V-cut narrowing from the wall of the cylindrical member to the receiving slot. An end cap is fixed to the end of the cylindrical member so as to cover the end of the longitudinal V-cut and receiving slot. The hinge may include a sheath portion with an inner area attached to the exterior of the hypodermic needle.

Abstract: A non-reusable syringe comprising a barrel having an open end and a restricted end, a piston slidably positioned within the barrel and forming a liquid-tight seal with the interior of the barrel, a shaft freely slidable within the barrel and extending beyond one end of the barrel, a connector engaging the piston and the shaft and having a protrusion extending therefrom, and a guide formed on the shaft for receiving the protrusion of the connector. The connector is detachable form the shaft. The connector comprises a collar holder fastened at one end to the piston and a collar freely rotatable about the collar holder. The guide comprises a groove formed on the shaft which engages the protrusion from the collar. The guide causes the shaft to be disconnected form the connector following an injection of a liquid from the syringe.