Fuel dispenser

A method of dispensing at least two fluids from at least two cylinders respectively, at least one of the fluids comprising a fuel, the method including the steps of:

• providing a dispenser according to any preceding claim;
• filling first and second cylinders of the dispenser with first and second fluids respectively;
• moving a first piston in the first cylinder and a second piston in the second cylinder to move fluid from the cylinders into a mixing line;
• mixing the fluids in the mixing line;
• and
• adjusting an aperture in the dispenser to change the flow characteristics of fluid from at least one of the first and second cylinders.

A fuel dispenser comprising:

• a first cylinder adapted to contain a first fluid, and having an outlet, and a piston movable in the first cylinder and adapted to urge the first fluid through the outlet;
• a second cylinder adapted to contain a second fluid and having an outlet, and a piston movable in the second cylinder and adapted to urge the second fluid through the outlet;
• a mixing line in fluid communication with the outlet of the first cylinder and with the outlet of the second cylinder;
• and
• a flashback arrestor;
• wherein at least one of the first and second fluids comprises a fuel, and wherein actuation of the dispenser causes fluid from the first cylinder and fluid from the second cylinder to mix in the mixing line in a proportion of at least 2:1;
• wherein the dispenser includes an adjustable mechanism that can be adjusted to vary the ratio of fluids delivered from the first and second cylinders into the mixing line, wherein the adjustable mechanism comprises a cam device which is adjustable to move the first and second pistons at different speeds through the cylinders.

A fuel dispenser comprising:

• a first cylinder adapted to contain a first fluid, and having an outlet, and a piston movable in the first cylinder and adapted to urge the first fluid through the outlet;
• a second cylinder adapted to contain a second fluid and having an outlet, and a piston movable in the second cylinder and adapted to urge the second fluid through the outlet;
• a mixing line in fluid communication with the outlet of the first cylinder and with the outlet of the second cylinder;
• and
• a flashback arrestor;
• wherein at least one of the first and second fluids comprises a fuel, and wherein actuation of the dispenser causes fluid from the first cylinder and fluid from the second cylinder to mix in the mixing line in a proportion of at least 2:1;
• wherein at least one of the first and second cylinders is adapted to be removed and replaced whereby the ratio of the diameters of the first and second cylinders can be adjusted to vary the ratio of fluids delivered from the first and second cylinders into the mixing line.