Patent ID: 11959501
Assignee: PNEUMAX S.P.A.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC F

Claim 0:
1. An actuation unit comprising:
an actuating arm movable between an open position and an operative closed position;
a pneumatic cylinder comprising a stem movable linearly along a cylinder axis and operatively connected to the actuating arm to control the movement of the actuating arm between the open position and the operative closed position; and
a braking unit configured to brake and/or stop the movement of the actuating arm, the braking unit comprising
(a) a threaded shaft comprising
a first end operatively coupled to the stem of the pneumatic cylinder in such a way that a translation of the stem determines a rotation of the threaded shaft, and
a second end provided with a head portion comprising at least one surface portion; and

(b) a braking assembly locked against rotation and axially movable relative to the head portion of the threaded shaft between a first non-braking configuration in which the braking assembly is not in contact with the at least one surface portion of the head portion and a second braking configuration in which the braking assembly is in contact with the at least one surface portion;

wherein the at least one surface portion is in a non-orthogonal arrangement with respect to the cylinder axis, and the braking assembly comprises a plurality of rollers and a support structure for the rollers configured to retain each roller of the plurality of rollers allowing a clearance with respect to a radial movement of the rollers, the rollers being able to assume a first radial configuration not in contact with the at least one surface portion and a second radial configuration in contact with the at least one surface portion.