Patent ID: 8015914
Filing Date: 2011-09-13
Classification: A47C

Abstract:
1. A pneumatic lift apparatus comprising: a main body including a body tube, with a cross-section of the body tube being neither a perfect circle nor a polygon, wherein the body tube includes an arcuate portion and a flat portion on an outer circumference thereof, with the arcuate portion and the flat portion contiguously connected to each other; a restricting device slidably mounted on the body tube of the main body, wherein the restricting device includes a first end, a second end, a through-hole and a groove piercing therethrough longitudinally and a flat piece disposed in the groove, with the flat piece abutting with the flat portion of the body tube, with the body tube restricted not to rotate relative to the restricting device; and a housing, wherein the restricting device is coupled to an end of the housing, with the main body inserted through the restricting device and received in the housing, with the main body fixed in the housing opposite to the restricting device.