Abstract: Apparatus for, and a method of, withdrawing liquefied cryogenic fuel stored in a primary insulated storage tank at a relatively low pressure and temperature; increasing the pressure of the withdrawn liquefied cryogenic fuel through a heat exchanger to warm the liquefied cryogenic fuel to a subcooled or near saturated liquid condition; and feeding the warmed and pressurized liquefied cryogenic fuel to an insulated tank on a vehicle at a refueling facility, said vehicle using liquefied cryogenic fuel as its fuel and the insulated vehicle fuel tank being adapted to safely contain and store the liquefied cryogenic fuel in liquid form, at an approximate saturated condition.

Abstract: An isolator system 10 comprises an isolator 11 moveably mounted on a support 12 and an impervious bag 16 open at one end and sealingly attachable to the isolator 11. A drum 90 containing a substance to be dispensed may be sealingly attached to the isolator by moving the isolator to the drum. The lid 110 of the drum 90 may be removed from the drum once the lidded end of the drum is within the isolator 11. The isolator is able to rotate about the axis of its support which causes inversion of the isolator and the drum now contained within the isolator. Substances contained within the drum may be dispensed into a second container such as an IBC whilst contained within the enclosure thus protecting an operator from contamination from the substance.

Abstract: A powder feeding method includes the steps of injecting a gaseous medium into a powder material held in a hopper from a porous wall forming a funnel at a bottom part of said hopper, such that the injection of the gaseous medium is carried out intermittently.

Abstract: An improved universal ball joint especially adapted to be used in the transmission of high torque, as in oil field use, includes a driving and driven shaft. One of the shafts, which may be the driving shaft includes a spherical ball received in a housing provided in the other shaft, which may be the driven shaft. The opposed surfaces of the ball and housing include axially extending grooves of essentially the same depth and length forming therebetween a plurality of chambers. Each chamber receives a pin which is tapered at each end and which forms the driving connection between the shafts. The shafts and the ball may include a bore for flow of fluid through the assembly, the ball being sealed in the ball chamber by seals to provide a sealed ball chamber which may be filled with lubricant, the ball being seated on a bearing and retained in the chamber by a retainer member which prevents relative axial movement between the shafts.