Abstract: A power take-off for compressors, comprising: a first rotating element (2), predisposed to be connected on command to a motor (40); at least a second rotating element (3), kinematically connected to the first rotating element (2), which is predisposed to be connected to a first user (50); a torque limiter or clutch (4), interposed between the first rotating element (2) and the second rotating element (3).

Abstract: A power take-off for compressors, comprising: a first rotating element (2), predisposed to be connected on command to a motor (40); at least a second rotating element (3), kinematically connected to the first rotating element (2), which is predisposed to be connected to a first user (50); a torque limiter or clutch (4), interposed between the first rotating element (2) and the second rotating element (3).

Abstract: The power take-off (10) applied on industrial vehicles eliminates noisiness generated by play between cogs of transmission cogwheels (14,19) when the p.t.o. is functioning non-operatively. Thanks to a special geometry of the cog directions of the cogwheels (19, 14) in the transmission gearings, play between cogs is eliminated when there is no power transmission. The play is re-established when the p.t.o. is functioning operatively, by overcoming elastic (21) means acting axially on the gearings (14), and by thus returning the gearings (14) into a normal operative position.

Abstract: The power take-off (10) applied on industrial vehicles eliminates noisiness generated by play between cogs of trans-mission cogwheels (14, 19) when the p.t.o is functioning non-operatively. Thanks to a special geometry of the cog directions of the cogwheels (19, 14) in the transmission gearings, play between cogs is eliminated when there is no power transmission. The play is re-established when the p.t.o. is functioning operatively, by overcoming elastic (21) means acting axially on the gearings (14), and by thus returning the gearings (14) into a normal operative position.

Abstract: The linear actuator comprises two variable-volume chambers (5) containing an operative liquid, each of the chambers (5) being delimited on one side by one of two mobile elements (4), which mobile elements (4) are solidly constrained one to another. One of the mobile elements (4) is connectable to an external user, for example a gearwheel of a gear coupling. A geared rotary positive displacement pump (10) reversibly transfers the operating liquid from one chamber (5) to the other chamber (5) through an infeed conduit (6), to move the mobile elements (5) selectively in one direction or another. A recycling conduit (7), narrower than the infeed conduit (6), places the two chambers (5) in communication and realizes a closed circuit, in a situation where the mobile elements 4) are stationary and the pump (10) is active.

Abstract: The linear actuator comprises two variable-volume chambers (5) containing an operative liquid, each of the chambers (5) being delimited on one side by one of two mobile elements (4), which mobile elements (4) are solidly constrained one to another. One of the mobile elements (4) is connectable to an external user, for example a gearwheel of a gear coupling. A geared rotary positive displacement pump (10) reversibly transfers the operating liquid from one chamber (5) to the other chamber (5) through an infeed conduit (6), to move the mobile elements (5) selectively in one direction or another. A recycling conduit (7), narrower than the infeed conduit (6), places the two chambers (5) in communication and realizes a closed circuit, in a situation where the mobile elements 4) are stationary and the pump (10) is active.

Abstract: An actuator for engaging and disengaging parts together which, during actuation may incur an obstacle to engagement, the actuator including a mechanism for incurring the obstacle and automatically stopping actuation, a mechanism for removing the obstacle to engagement and for automatically restarting actuation upon removal of the obstacle thereby to achieve engagement.