The Zilch floor pump is claimed to address that problem, with head seals that don't even touch the valve stem until it locks on. With most pumps, the head initially has to be shoved onto the valve ...

The FloorMate80 is a floor-by-floor basis ... “If you have a small job, you don't need to pull your big pump out. You can put this in a bed of a truck, put it on a load trailer, and roll ...