Retractable step

摘要

A retractable step for camper-trailers, motor homes and other uses, and comprising; a supporting member which is mounted under a doorway and has a step member connected to it by pivotal linkage which enables the step member to be raised and retracted under the threshold of the doorway for storage or lowered and extended in front of it for use; and with means for biasing the step member into its usable position and other means responsive to vehicle engine vacuum pressure for automatically retracting it into storage.