Weird pumping machines

Contests Speed Modeling Contests
1

Time: 30 minutes
Exclude rendering

lobo_nz:

http://blender.formworks.co.nz/tests/pumping%20machine.jpg

Siegel:

http://img441.imageshack.us/img441/7125/pump7hr.jpg

BrianH:

http://img461.imageshack.us/img461/1545/weirdpumpingmachine6mw.jpg

Gabio:

http://img522.imageshack.us/img522/6178/pumpingmachine7an.jpg

Maaatt:

http://img513.imageshack.us/img513/262/pump9km.jpg

BackiZ:

http://img.photobucket.com/albums/v352/BackiZ/pumping2.jpg