I think it's time for some machining
. You could build a compressor-based suction-cup. However, that would generate a lot of suction, so you should really have a manual release valve.
How it works:
So you have a reciprocating piston, with an intake (suction) and an outtake (the atmosphere)
^=Output v=Suction intake
---^---v---
| Piston |
|====== |
| | |
| |----------------Pushrod
| | |
| |||\ |
| ||| \ |
| ===\ |
/ \
Motor Crankshaft
Hopefully you guys liked my ASCII Art
I don't know if CD likes ASCII art
