Abstract: A pipe joining device for forming a junction in pressurised and rehabilitated pipes between a first pipe and a branch pipe, the pipe joining device including a substantially rigid body at least in part of thermoplastic, the body including a first pipe sealing portion adapted to form a seal with the first pipe and a branch pipe sealing portion adapted to form a seal with the branch pipe.

Abstract: The planing surface of amphibious vehicle hull (2), with reference to (FIG. 2), comprises at least one discontinuity, e.g. wheel arch recesses (12) to (15). The wheels may be retractable. Access is required to the full arch aperture during vehicle manufacture, but not in use. To maximize the planing area, planing plates (9, 11) are provided. These are fixed in position in both land and marine modes; but may be removable for maintenance. At least one plate may comprise at least part of a strake (22, 25) attached to, or incorporated in, its underside. Such strake section(s) may be sacrificial, and may be made from rubber. A trim tab (30, FIG. 9), may be provided aft of a rear planing plate, and may be hinged thereto. The plates may include water drains and jacking apertures. A ride plate (38, FIG. 1) may be provided between two planing plates, and may be integral therewith.

Abstract: An excessive speed and theft deterrent system wherein a signal is generated having a magnitude which is proportional to the speed of the vehicle. A comparator generates an output signal when the magnitude of the generated signal is greater than a preselected voltage level. In response to the output signal, a pulse train is generated having a predetermined pulse rate wherein the pulse train is counted to thereby indicate a total time in which the vehicle is operated at speeds exceeding a predetermined speed. The system also includes sounding devices for generating a warning signal when a door or the ignition system is operated without authorization.