Patent ID: 11933329
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A pneumatic actuator comprising:
a plurality of N (N≥2) cylinders, each including a cylinder tube and a piston that divides the space inside the cylinder tube into two air chambers; and
a control valve, wherein a plurality of the pistons of the plurality of N cylinders are connected each other so that the plurality of the pistons have the same displacement,
wherein among all pressure receiving surfaces of the pistons of each of the N cylinders, a cross-section area of one pressure receiving surface of the i-th (1≤i≤N) pistons is the (2i−1)th smallest,
wherein the two air chambers of the plurality of N cylinders are referred to as a first chamber, a second chamber, ... a (2N−1)th chamber, and a (2N)th chamber in ascending order in cross-section area, respectively, and wherein the control valve is operable to position the pneumatic valve in a forward stroke such that an air pressure source is connected only to the first air chamber, only the (2N)th air chamber is connected to the atmosphere, the second air chamber is connected only to the third air chamber, the fourth air chamber is connected only to the fifth air chamber, . . . , and the (2N−2)th air chamber is connected only to the (2N−1)th air chamber.