JACK Russian patent published in 2017 - IPC B66F1/08 B66F3/24 

FIELD: transportation.

SUBSTANCE: jack contains a housing wherein a power and a control pistons are installed. A screw with a conical heel and nonlocking thread, interacting with the power rod, is installed on the rod of the control piston with the possibility of rotation. The screw with the conical heal through the control piston is pressed by a spring to the housing and thus braked. A glass is rigidly mounted on the power rod, interacting with the housing by a spline connection. A groove is made in the spline connection, in which the signal rod is mounted connected to the housing by a damper and intercating with the stops made in the glass.

EFFECT: increased reliability, simplified design and expansed functionality.

2 cl, 3 dwg