Abstract: A linearized peristaltic pump has a substantially circular elastomeric tube (30) clamped within a pump housing (1) and a plurality of tube-engaging rollers (40) adapted to compress the tube (30) to pump fluid from an inlet end (33) to an outlet end (34). The tube (30) is clamped longitudinally by a circlip (35) so as to have a flattened clamped part (31) and a bulbous unclamped part (32) which is engaged by the rollers (40). The rollers (40) are mounted on the outer ends of spring-loaded rotor arms (42) and move on a cam track (50) to alter the compression of the tube (30) progressively in a tube-encountering sector (E-B) and a tube-releasing sector (C-A).

Abstract: Dynamo electric machines and stators for use in such machines are provided. The stators comprise plates configured to be substantially flat and a plurality of spaced apart projections or teeth extending away from the plate and, together with the plate defining a plurality of slots therebetween. The stators comprise masses of metal particles. Using stators made from such metal particles provides enhanced machine efficiency, which is believed to be because of reduced eddy current effects in the stator. Motors including rotors having generally flat arrays of permanent magnetic poles and such stators which are spaced apart from and generally facing the permanent magnetic poles and have a plurality of magnetic windings, and pumps powered by such motors are included within the scope of the present invention.

Abstract: A control system for selectively adjusting effective flow areas of an aircraft engine exhaust nozzle to change operational characteristics of the nozzle. The control system includes a chamber having a hollow interior, a plurality of outlet passages extending from the hollow interior of the chamber to sites within the exhaust nozzle, and an adjustable inlet extending from a pressurized air source to the hollow interior of the chamber for delivering a jet of pressurized air to the chamber. The inlet is adjustable to direct pressurized air to selected one or more outlet passages for the delivery of air via the one or more outlets to corresponding one or more sites within the exhaust nozzle, thereby to change the operational characteristics of the nozzle.