I started by creating the small screw nut that attaches the metal pot to the pump. This was simply created with a cylinder with the sides decreased to 8, smoothing off and with a radius of 3cm.
The next stage was the main body. This again was a cylinder, but a bit bigger with the smoothing on. To create the lid I converted the object to an editable poly to allow me to manipulate individual polygons and points. I selected the polygons on the top of the cylinder and using the bevel tool I extruded and scaled the polygons larger then back in again, creating the effect of a lid on the cylinder.
On the side , at the top of the cap, there is a small lip which would be were you would flick open the lid. I created this part by selecting the polygons on a side and pulling them out creating the lip. With a mesh smooth modifier applied this section now looked similar to the actual part.
A hinge would have to be applied to the back of the metal cap. This was made by using a square shaped rectangle object at 4cm high with 3 width and height segments. Then converting it to an editable poly I could select the polygons down one side and pull them in from the bottom up, creating an incline from top to bottom. I then applied a mesh smooth modifier to make it look more realistic and less like a box.
For extra detail on the hinge I created to small spheres to go either side to look like small bolts holding the hinge.
A final added touch to the top of the metal cap included a small cylinder which acts as a kind of cover between the hinger and the lid. This was just a small cylinder with a mesh smooth applied.
Below is the final model for the metal cap. Like the wheel, this model has all objects grouped and named appropriately for easy import and export. This model can easily be cloned multiple times as needed for the final steam pump model.
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