Abstract: A device (1) for the adjustment of a gland nut (2), provided with a plurality of gripping means (8) through which said gland nut (2) can be caused to rotate, comprising an engaging member (3) and actuator means (25, 26) to cause the engaging member (3) to effect a working movement from a first position to a second position. The engaging member (3) is capable of effecting one-way engagement with the gripping means (8) to rotate the gland nut (2) through a predetermined angle (?) in the working movement from the first position to the second position.

Abstract: A reciprocating pump (1) comprises a plurality of reciprocating pistons (2a, 2b, 2c) extending along respective longitudinal axes (X-X) parallel to each other and lying in a plane (?), a plurality of pumping work chambers (5a, 5b, 5c), and a plurality of diaphragms (7a, 7b, 7c), each arranged in a respective pumping work chamber (5a, 5b, 5c). In particular, the diaphragms (7a, 7b, 7c) are arranged coplanar in a plane (?) perpendicular to the axes (X-X) of the reciprocating pistons (2a, 2b, 2c), and the diaphragm of at least one reciprocating piston is offset with respect to the diaphragm of the adjacent reciprocating piston, in the direction (Y-Y) perpendicular to the plane (?) defined by the axes (X-X) of the reciprocating pistons (2a, 2b, 2c).

Abstract: A device (1) for the adjustment of a gland nut (2), provided with a plurality of gripping means (8) through which said gland nut (2) can be caused to rotate, comprising an engaging member (3) and actuator means (25, 26) to cause the engaging member (3) to effect a working movement from a first position to a second position. The engaging member (3) is capable of effecting one-way engagement with the gripping means (8) to rotate the gland nut (2) through a predetermined angle (?) in the working movement from the first position to the second position.