companion chair
n.— «Things went well enough for the first four years that Marija took my mother places by pushing her in something known as a “companion chair.”…Later on, when my mother could no longer walk but still insisted on having her hair done, I drove over to help her out of the chair and up the stairs.» —“An immigrant’s gift” by Douglas Bukowski Chicago Tribune Oct. 28, 2007. (source: Double-Tongued Dictionary)