Patent ID: 8720601

Claim:
A pressurised air pick device with variable control that comprises a cylinder and piston assembly for actuating a picking member, and a distribution portion with variable control of the pressurised air to said cylinder and piston assembly, the distribution portion including an upper body, a lower ring and a movable fluid-distribution slider capable of sliding between the body and the ring, wherein the distribution portion is housed in the cylinder of the cylinder and piston assembly at the upper portion thereof and coaxially therewith, a fluid variable control is housed in the head of the cylinder closing the upper portion of the cylinder connected to a fluid-supply section, and said upper portion of the cylinder includes first and second longitudinal channels for conveying pressurised air in tight communication with the distribution portion through coaxial radial channels thereof, the first longitudinal channel being intended more particularly for supplying the cylinder and piston assembly in conjunction with the supply section and the variable control portion of the fluid, and for controlling the movement of the slider of the distribution portion, and the second longitudinal channel is intended to allow alternate raising of the piston and escape of the fluid at the lower level of the cylinder and piston assembly, the longitudinal channels each having a cross-section in the shape of a groove that is open towards the radial channels of the distribution portion; and wherein the ring of the distribution portion comprises at least one radial escape channel connected to a radial channel opening out at the upper portion of the cylinder, adapted to be opened or closed by the movable slider and enabling the escape of fluid to be opened when the piston rises again.