An adjustable plumbing fitting has a piston rotatably and telescopically engaged in a housing, with one end of the housing adapted to be connected to a first plumbing part, and a cylindrical extension on the piston projecting from an opposite end of the housing and adapted to be connected to a second...http://www.google.com/patents/US7921482?utm_source=gb-gplus-sharePatent US7921482 - Adjustable plumbing fittings
