A tapered packing insert having an integral self-locking corner construction.

In an ejector, a nozzle includes a nozzle tapered section having an inner passage with a radial dimension reduced toward a nozzle outlet port, and a needle having a needle tapered section disposed in the inner passage. The needle tapered section has a cross sectional area reduced toward a downstream end of the needle, and the downstream end of the needle is positioned at a downstream side with respect to the nozzle outlet port. In addition, the nozzle tapered section has a taper angle (.phi.1) w...

A worm and meshing worm gear are provided. The worm has a central cylindrical portion, and tapered portions at either end thereof. The angle of taper of the two tapered portions is the same, but in different directions. The angle of taper is substantially equal to 360 degrees divided by the number of teeth in the worm gear. Contact between the worm and gear occurs over three times the number of teeth in which contact is obtained with a conventional cylindrical worm. The worm is capable of being ...

A mattress is provided at the head and the foot with inclined surfaces diminishing the thickness of the mattress at those places in order to accommodate the feet and head of the user at these positions on the mattress. A cradle bar may be pivotally mounted adjacent one of the inclined surfaces to hold the bed clothes free of the feet of the user.

A worm and meshing worm gear are provided. The worm has oppositely tapered frustoconical portions at either end thereof. The angle of taper of the two tapered portions is the same, but in different directions. The angle of taper is substantially equal to 360 degrees divided by the number of teeth in the worm gear. Contact between the worm and gear occurs over a plurality of teeth as contrasted with substantially only one tooth in the conventional cylindrical worm. The worm is capable of being fo...

A connector comprising a tapered socket component, a complementary tapered spigot component and a sleeve component for location between the socket component and the spigot component, the sleeve component and one of the other components being screw engageable, whereby, in use, screwing together of these components laterally deforms the sleeve component to clamp the spigot component within the socket component.

A coupling having slots for receiving drive tabs of an associated driving shaft and a driven shaft, wherein the tabs of the driving shaft and the driven shaft are tapered to militate against rotational play between the driving shaft and the driven shaft which results in undesirable wear and damage to the drive shafts and coupling.

A syringe for injecting a medical fluid into a site or withdrawing a medical fluid from a site, having a syringe barrel and an elastomeric plunger. The syringe barrel is of polymeric material having an inner surface defining a tapered cylindrical chamber extending from the proximal end to the distal end of the syringe. The distal end terminates in a tip, having a bore therethrough, to which an injection needle or a connector is attached. The proximal end receives the slidably insertable elastome...

An optical fibre core (39) having a reflective coating (33) along a first part of its length such that electromagnetic radiation may travel along the first part of the optical fibre by means of reflection, and further having a cladding (37) along a second part of its length, the cladding having a refractive index suitable for permitting the electromagnetic radiation to travel along the second part of the optical fibre. The invention also provides a fibre optic coupling arrangement for coupling a...

A fastener has a dual tapered head and a tapered shank configured to have such interference engagement with a work bore as to controllably minimize warpage of the work.