Air driven hydraulic pump
US7168928B1 · kind B1 · utility
44Cited by
15References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2004 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Nov 29, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B9/135
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air driven hydraulic pump includes two opposed cylinders to either side of a center section. Two pneumatic pistons are slidable in the opposed cylinders and are coupled with one another by a common shaft extending through the center section. The pneumatic pistons ride in the opposed pneumatic cylinders and include hydraulic plungers extending therefrom. Cylinder heads integral with the cylinders provide hydraulic cylinders aligned with the hydraulic plungers. An air valve delivers pneumatic pressure to alternate sides of both pneumatic pistons such that the forces on the pistons are additive alternately in each direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.