Multiple cylinder-capacity pressurized fluid (motor or pump) mechanism
US4898076A · kind A · utility
15Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03C1/045
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a pressurized fluid mechanism comprising a plurality of pistons (14) and a plurality of different cylinder capacities. A particular cylinder capacity is selected by means of two identical slide valves (17, 18) which serve selectively to neutralize either a first overall cylinder capacity (45a) or a second overall cylinder capacity (45c), or both or neither of said first and second cylinder capacities. One application of the invention is to providing an efficient and compact motor which is cheap to produce.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.