A linear blocking apparatus having - a linear device which is longitudinally displaceable along an axis and is guided in a housing, wherein it is possible to switch back and forth, by means of a connectable or integrated switching device, at least between two motional states of the linear device, namely between - - a first motional state (L1 or L2), in which the linear device is displaceable along the axis within a limited length of travel, either in the motional direction facing away from the housing or in the motional direction facing toward the housing, and is blocked in the respectively opposite direction, and - - a second motional state (L1 and L2), in which the linear device is displaceable along the axis within a limited length of travel, in the two opposite motional directions (L1, L2), whereby - the linear device acts directly or indirectly on a rotary device which is present, wherein the rotary device, in dependence on the motional direction (L1, L2) of the linear device, can be set in rotation in diverse rotational directions (R1, R2), in particular about the axis, - an, in particular mechanical, blocking device is present, which is, or can be brought, directly or indirectly in operative connection with the rotary device, - the blocking device is actuable by the switching device, whereby it is possible to switch back and forth between the first motional state (L1 or L2) and second motional state (L1 and L2) of the linear device, and hence between the possible rotational directions (R1, R2) of the rotary device, - characterized in that - the blocking device has a pivot bearing unit having a rotatable 1st. bearing element, and a 2nd. bearing element which is rotatable relative thereto, - the 1st. bearing element is directly or indirectly coupled to the rotary device and - the blocking device has a blocking unit, by means of which the rotary motion of the 2nd. bearing element is blockable in both rotational directions (R1, R2) and - the 1st. bearing element is configured rotatably relative to the 2nd. bearing element respectively only in one rotational direction, and a relative rotation in the opposite rotational direction is blocked. - a linear device which is longitudinally displaceable along an axis and is guided in a housing, wherein it is possible to switch back and forth, by means of a connectable or integrated switching device, at least between two motional states of the linear device, namely between - - a first motional state (L1 or L2), in which the linear device is displaceable along the axis within a limited length of travel, either in the motional direction facing away from the housing or in the motional direction facing toward the housing, and is blocked in the respectively opposite direction, and - - a second motional state (L1 and L2), in which the linear device is displaceable along the axis within a limited length of travel, in the two opposite motional directions (L1, L2), whereby - - a first motional state (L1 or L2), in which the linear device is displaceable along the axis within a limited length of travel, either in the motional direction facing away from the housing or in the motional direction facing toward the housing, and is blocked in the respectively opposite direction, and - - a second motional state (L1 and L2), in which the linear device is displaceable along the axis within a limited length of travel, in the two opposite motional directions (L1, L2), - the linear device acts directly or indirectly on a rotary device which is present, wherein the rotary device, in dependence on the motional direction (L1, L2) of the linear device, can be set in rotation in diverse rotational directions (R1, R2), in particular about the axis, - an, in particular mechanical, blocking device is present, which is, or can be brought, directly or indirectly in operative connection with the rotary device, - the blocking device is actuable by the switching device, whereby it is possible to switch back and forth between the first motional state (L1 or L2) and second motional state (L1 and L2) of the linear device, and hence between the possible rotational directions (R1, R2) of the rotary device, - characterized in that - the blocking device has a pivot bearing unit having a rotatable 1st. bearing element, and a 2nd. bearing element which is rotatable relative thereto, - the 1st. bearing element is directly or indirectly coupled to the rotary device and - the blocking device has a blocking unit, by means of which the rotary motion of the 2nd. bearing element is blockable in both rotational directions (R1, R2) and - the 1st. bearing element is configured rotatably relative to the 2nd. bearing element respectively only in one rotational direction, and a relative rotation in the opposite rotational direction is blocked.