A gas cylinder or tank is a pressure vessel used to store gases at high pressure. Gases stored this way are called bottled gases. Telescopic cylinders are used for applications with severe space constraints. The structural appearance of a telescopic cylinder includes outer body and an inner piston between which, lays the outer piston that is useful in the passage of fluid. Telescopic cylinders are gas cylinders and have varied applications in the field of fluid mechanics, bio-chemistry and industries. Massive demand for telescopic cylinders has to be met in india by the manufacturers, suppliers and vendors.A two or 4 stage telescopic cylinder always consists of three or four or more concentric tubular components, each of them required to be machined to a high degree of precision and accurately placed in position with precise clearances. The task of manufacturing a telescopic cylinder is quite challenging since each long and slender part requires special methodology for manufacture as well as special attention and care during handling. A telescopic cylinder is similar to a hydraulic cylinder. A telescopic hydraulic cylinder comprises a hollow base member arranged to be supported pivotally on a mount, as by trunnions, the base member including a removable end closure at its rearward end. The interior surface of the base member of the telescopic cylinders incorporates a set of machined grooves which removably mount a set of rings that act as a stop, a fluid seal, a bearing and a wiper for the largest of a plurality of telescoping cylinder stages each incorporating a similar set of internal machined grooves and rings which cooperate with the adjacent smaller stage. The smallest stage receives a piston closed at its forward end which mounts a connector for attachment to a load to be moved. An internal groove on the rearward end of each telescopic cylinder stage removably mounts a lifting ring and an external groove on the rearward end of each cylinder stage and piston removably mounts a guide bearing ring for cooperation at its forward end with the stop ring of the adjacent larger cylinder stage and at its rearward end with the lifting ring of the adjacent larger cylinder stage. Telescopic hydraulic cylinder construction which provides for the use of thin wall tubing and removably attachable bearing, seal, stop, wiper, guide and lifting rings, thereby eliminating welding, threading and excessive machining of telescopic cylinder tubing.
Normally, telescopic cylinders are constructed in one of two basic ways. One way is to start with thick wall tubing and form lifting rings, stops and bearing and seal grooves thereon by machining away metal from the tubing, on appropriate inside and outside surfaces of the various cylinder components. A second typical method is to use standard wall tubing and affix by welding, threading or other means, composite annular members shaped to provide lifting rings, stops and bearing and seal grooves.
