What Iwe claim as new and desire to secure by Letters Patent is:
1. An irrigation outlet attachment comprising a body having a display surface, the body being securable to an irrigation outlet for displaying information on the display surface.
2. An attachment as claimed in claim 1 in which the information is promotional information.
3. An attachment as claimed in claim 2 in which the promotional information is permanently secured to the surface.
4. An attachment as claimed in claim. 2 in which the promotional information is moulded on the surface.
5. An attachment as claimed in claim 2 in which the promotional information is etched on the surface.
6. An attachment as claimed in claim 2 in which the promotional information is interchangable.
7. An attachment as claimed in claim 6 in which the promotional information is on releasably adhesive stickers releasably securable to the surface.
8. An attachment as claimed in claim 1 in which the surface is generally parallel to a cover of an irrigation outlet when the body is secured to the irrigation outlet.
9. An attachment as claimed in claim 1 in which the body is a disc.
10. An attachment as claimed in claim 9 in which the disc has securing means.
11. An attachment as claimed in claim 10 in which the securing means includes at least one aperture through the disc.
12. An attachment as claimed in claim 11 in which the aperture is situated in a recess in the disc.
13. An attachment as claimed in any of the preceding claims in which the body is annular in shape.
14. An attachment as claimed in claim 10 in which the securing means is an adhesive.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. In an engine which includes means for combusting hydrocarbons in air to produce work wherein said means also produces a stream of exhaust gasses that contain nitrogen oxides, with the engine having an exhaust conduit through which the exhaust gasses are passed before being emitted into the atmosphere, the improvement comprising:
a source of ammonia:
an injector apparatus coupled to said source to receive ammonia therefrom and inject the ammonia into said exhaust conduit;
said source of ammonia comprises a container containing a mixture of ammonia and water;
said injector apparatus includes a tube that lies in a heat-exchange relationship with said exhaust conduit to use the heat of the exhaust gasses to heat the mixture of ammonia and water, and a separation station that receives said heated mixture and separates liquid water from gaseous ammonia, and directs them along different paths, and that injects the gaseous ammonia into said exhaust conduit.
2. The engine described in claim 1 wherein:
said mixture of ammonia and water in said container includes about 25% ammonia and about 75% water.
3. In an engine which has an engine block with cylinders where hydrocarbons are combusted in air to produce work, and which has an exhaust conduit that carries away a stream of exhaust gasses that contain nitrogen oxides, a source of ammonia and an injection apparatus that is coupled to said source and that injects ammonia into the conduit to reduce nitrogen oxides, the improvement wherein:
said source of ammonia comprises a container and a liquid mixture of ammonia and water in said container, said container being thermally isolated from said engine block and said exhaust conduit and said engine;
a separation station that heats said mixture and separates liquid water from gaseous ammonia, and directs them along different paths, and that injects the gaseous ammonia into said exhaust conduit.
4. The engine described in claim 3 wherein:
said injector apparatus includes a tube that carries said liquid mixture and that lies in a heat-exchange relationship with said exhaust conduit to use the heat of the exhaust gasses to heat the mixture of ammonia and water.
5. The engine described in claim 3 wherein:
said mixture of ammonia and water in said container includes about 25% ammonia and 75% water.