Patent ID: 8522755
Filing Date: 2013-09-03
Classification: F04B

Abstract:
1. A pump, in particular a high-pressure fuel pump, having a rotationally driven drive shaft that has a portion eccentric to its axis of rotation, a ring rotatably supported on the eccentric portion, at least one pump piston, which is braced directly via a piston base of the piston pump or via a support element on the ring and is driven in a reciprocating motion upon the rotary motion of the drive shaft, and in the vicinity of where the piston base or the support element is braced, ring having an at least approximately plane contact face, and a bracing face of the piston base or of the support element on the ring is larger than a cross-sectional area of a shaft of the pump piston, wherein an extent of the bracing face of the piston base or of the support element in a tangential direction to the axis of rotation of the drive shaft is greater than its extent in a direction of the axis of rotation of the drive shaft, and wherein the extent of the bracing face of the piston base or of the support element in the tangential direction relative to the axis of rotation of the drive shaft, beginning at a longitudinal axis of the pump piston is greater counter to the direction of rotation of the drive shaft than the extent in the direction of rotation of the drive shaft.