Abstract: An adaptor for adapting a seat of an engine capable of using a first fuel and having a seat for receiving a first fuel injector means with a discharge nozzle for flowing the first fuel, comprising a body having a bore with side walls for receiving the first fuel injector means, a plurality of spaced apart protuberances extending from the sidewalls for limiting movement of the discharge nozzle, an inlet for receiving a second fuel, and an adaptor hole for communicating with the discharge nozzle and the inlet, the adaptor hole being formed through a portion of the body which is to be fitted within the seat of the engine originally provided for receiving the first fuel injector means. The adaptor can be used to modify an existing engine using the first fuel such that the engine can use both the first fuel and a second fuel.

Abstract: An instant-on valve assembly with manual override is designed to be connected to a tank containing high pressure gaseous fuel. The valve assembly and manual override allows the tank to be alternately closed off, vented or allows the gas in the tank to bypass the instant-on valve. The instant-on valve assembly can be repaired or replaced without venting the tank. The instant-on valve assembly has a main valve and a bleed valve The main valve has a secondary plunger that opens and closes a main orifice. The bleed valve has a bleed valve stem that opens and closes a bleed orifice. The main valve is slidably mounted within a housing and has a chamber at one end and a zone at another end. Both the zone and the chamber have access to high pressure gaseous fuel within the tank. High pressure gaseous fluid within the zone can be drained when the bleed valve stem is fully open. The bleed valve stem is connected to a solenoid and opens upon activation of the solenoid.

Abstract: A fuel vaporizer and method of fuel vaporization are described for use with a fuel such as propane, that is know to tend to liquefy at low temperatures and to vaporize at high temperatures. The vaporizer and method described pertain to a series of internal walls and cavities which promote heat-exchange and transfers heat from a fluid engine coolant to the fuel. The transfer of heat and vaporization of fluid occurs by virtue of movement of the fuel through a series of countercurrent passages created by the walls and cavities, with increasing cross-sectional dimensions in the passages to accomodate the expansion of fuel from the liquid to the gaseous state. The heat is transferred by conduction across a metallic interface which forms part of the vaporizer and which separates the fuel from the coolant.

Abstract: A valve construction for high pressure gases, allowing rapid opening and closing, includes a main body with inlet and outlet passages, and a guide sleeve having a primary and a secondary piston slidably mounted within the sleeve, the primary piston being adjacent a closure at one end of the sleeve, and the secondary piston being at the end of the primary piston which is remote from the closure. The secondary piston supports a seal for closing the gas outlet passage when the secondary piston is remote from the closure. The secondary piston has an axial passage with an elongate member movable therein, the elongate member being fixed to the primary piston. A valve means is provided between the axial passage and the elongate member, the valve means being open when the bleed orifice is closed. A peripheral seal between the secondary piston and the sleeve acts to restrain the axial movement of gas.