Reversible double-throw air motor
US6217306A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2000 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Apr 17, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01C20/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A reversible double-throw air motor provides for forward and reverse operation by having a cylinder member rotate relative to a stationary valve plate between fixed forward and reverse positions of the cylinder member. The valve plate has diametrically opposite pressure ports and diametrically opposite exhaust ports at an end surface that faces the cylinder member. The cylinder member has a transfer passage associated with each quadrant of the inner surface, the transfer passages opening at wall ports at the inner surface close to each of the two bottom dead center lines. In the forward position of the cylinder, pressure is supplied from the pressure ports in the valve plate through two of the transfer passages to opposite quadrants while the other two quadrants are open to the exhaust ports in the valve plate. For reverse operation, the cylinder is rotated, which reverses the quadrants open to the pressure and exhaust paths. The transfer passages of the cylinder that are associated with exhaust quadrants in each mode communicate the exhaust quadrants with portions of the valve exhaust ports. Instead of being in a separate valve plate, the pressure and supply ports can be in an end…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.