Abstract: A pump unit includes a main pump (4) and a charge pump (5), the pump capacity of which is adjustable via an adjusting element. To adjust the pump capacity of the charge pump (5), an adjusting element of the charge pump (5) is acted upon by an adjusting force which is dependent on the inlet pressure of the main pump (4).

Abstract: A transfer car in a conveyance system for metal coils, having a support saddle, a chassis that can be moved along a conveyance path by a drive and a mechanism for raising and lowering the support saddle along a linear vertical guide on a plate-like base frame. A steel slab is used as the plate-like base frame, on which a scissor unit is mounted for the purpose of linear vertical guidance and so as to not take on any lifting forces. Two lifting cylinders are installed some distance apart as the drive and act directly on the support saddle to provide the sole lifting forces to raise and lower the support saddle.

Abstract: The invention relates to a pump unit (1) with a main pump (4) and a charging pump (5) with a variable pump capacity. A lifting ring (23) is provided for varying the capacity of the charging pump (5). A regulating power, which depends on the inlet pressure of the main pump (4), acts on the lifting ring (23).

Abstract: A invention relates to a transport car in a supply unit for metal coils, comprising a chassis (2) which may be displaced along the supply path (1) by means of a drive, with means for raising and lowering a carrying saddle (4) along a linear vertical guide (5) on a base frame (3). The coil transport car construction can be improved, whereby, for example, a steel slab is used as a plate-like base frame (3) on which a scissors-type lifting gear (6) is arranged as linear vertical guide (5) and, for raising and lowering the carrying saddle (4), two directly acting lifting cylinders (7) are arranged thereon as drive with opposing separations.