I always associated this name with the rock group from the 1960's.Upon doing a little research here,I found out that the rock group took it's name from one of these machines they saw sitting by the roadside
Taking their name from the side of a steamroller—made by the Buffalo-Springfield Roller Company—that was parked on the street outside Friedman’s house (where Stills and Furay were staying), the new group debuted on April 11, 1966, at The Troubadour in Hollywood. A few days later, they began a short tour of California as the opening act on a bill featuring the Dillards and the Byrds.
For What It's Worth....:o)