Patent ID: 7441492
Filing Date: 2008-10-28
Classification: F04B

Abstract:
1. Eccentric drive mechanism for a volumetrically acting unidirectional pump including the following features: a) at least one stroke member (HG) which is rotationally fixed to a shaft (W) of a crank mechanism having at least one stroke bearing (HL) eccentric relative to a rotational axis (XX) of the shaft (W); b) the stroke bearing (HL) connecting the stroke member (HG) to a coupling member (KG) which does not participate in a rotary movement and which is in turn connected by a transverse bearing (QL) to at least one pressure member (DG) for a oscillating delivery drive mechanism of at least one piston-cylinder unit of the pump; c) at least one pressure delivery source (DQ) for a fluid lubricant being connected at it's output side to the transverse bearing (QL) via a passage system; d) the passage system, starting from a connection passage (KA) connected to the pressure delivery source (DQ), including at least one first passage (K e) a hollow space arrangement provided in the region of the stroke bearing (HL) within a bearing surface (L f) wherein the hollow space arrangement provided in the bearing surface (L member (HG) corresponding to the low pressure phase of the eccentric drive mechanism, has a boundary which extends at least section-wise with a spacing from the boundaries of the bearing surface (L