Piston pump
US4671743A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1983 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | May 12, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/084
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In the case of piston-machines and in particular those having an elastically deformable sealing tube between the piston and the cylinder, which causes a relatively large structural length of the cylinder-piston arrangement and is provided if necessary with a forced feed for the lubricant, a reduction in the space requirement, in particular the structural length of the cylinder-piston arrangement is achieved by a driving member (30) associated with each piston (20) and embracing the associated cylinder (25) externally and extending over at least part of the length of the cylinder, and frictionally connected, e.g., to a rotating driving mechanism (10). The pulsating secondary space (35) formed by the driving member (30) at the outside of the cylinder (25) is connected for the avoidance of shock pressures because of filling with lubricant liquid flowing away, through a balancing channel (40) of large cross-sectional area to a pressure-balancing chamber (110). For further reduction in the space requirement the often necessary lubricant cooling may be effected by means of a heatexchanger (210) to which the lubricant and the working medium of the piston machine are admitted and which is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.