A review on the physiology of Insulin like Growth Factor-I (IGF-I) ... by Debnath, Surajit / Advances in Environmental Biology.
The spring piston airgun generates power using a powerful spring-loaded piston that is housed within a compression chamber. Cocking the gun (using a break barrel, side lever, or under lever mechanism) causes the piston assembly to compress the spring. When the spring is released it pushes the piston forward compressing a column of air in the chamber behind the pellet.
Other applications are fixture construction and workpiece or tool clamping. Operational principle The thrust or draw piston is pressurised reciprocally by the disk spring packet or hydraulic pressure. The spring packet is compressed with increasing oil pres-sure; the spring force increases.