Hydraulic pump unit
US6764285B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Mar 15, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B11/0066
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a hydraulic pump unit having a plurality of pump elements, disposed in one plane, each of which has one pump cylinder and one pump piston longitudinally displaceable in the pump cylinder, and whose longitudinal axes intersect at a common intersection point, and having a cam drive with cams, which upon a rotation of the cam drive relative to the pump elements act upon the pump pistons with an actuating motion. To enable a uniform pumping of the hydraulic fluid and to make a high degree of smoothness of the hydraulic pump unit possible, it is proposed that the number and the angular spacing of the cams is adapted to the number and angular spacing of the pump elements in such a way that when a certain number of pump pistons are located at top dead center, the same number of pump pistons are at bottom dead center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.