I rely on a floor pump at home, but always carry an inexpensive frame pump on my bikes - inexpensive because I figure it may get stolen, or perhaps get bent over a dog or something. I prefer the frame pumps that fit on to the frame by wedging themselves in by spring pressure, expanding the pump into the triangle, if you know what I mean.
Anyway, the disadvantage to all of these frame pumps is that the pump head fits directly on to the valve stem, introducing the possibility that the stem gets ripped out of the tube while pumping.
It occurs to me that a neat accessory might be an auxiliary piece of air hose with a male fitting on one end and a female on the other. It would be fitted on the pump head when needed, and the other end would go on the valve stem. It could be sold in two versions, one for Schraeder and one for Presta valves, or maybe even in a convertible version with Schraeder on one end and Presta on the other. Maybe there could even be a "Deluxe" version that incorporated an in-line guage. When not in use it would be rolled up and stashed in the seat bag along with the repair kit and tire levers.
Does anyone already make something like this?
Are the parts available such that one could home-brew one?
What do you all think?