Air driven pumps and components therefor
US6142749A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2000 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Jan 6, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/0736
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air driven double diaphragm pump including two opposed pump chambers with an air motor having air chambers therebetween. The pump chambers and air chambers form pumping cavities divided by diaphragms. Each pump chamber includes an inlet ball valve and outlet ball valve. An inlet manifold is positioned below the pump chambers and an outlet manifold above. Tie-rods extend both across the pump from one pump chamber to the other with nuts to place the assembly in compression. Tie-rods also extend from the outlet manifold through the pump chambers, to the inlet manifold and to feet mounted therebelow. Two plates, one to either side of the air motor extend to grooves in the inlet and outlet manifold and also extend to grooves in the pump chambers so as to close of the side of the pump structure. With the plates, an outlet manifold is provided from which air may be exhausted remotely. The ball valves include small diametrical clearance and a limitation on lift for added performance. The ball valves also include seats which are sealed with the components of the pump through the use of O-rings and surfaces polished to 10R.sub.A. Belleville washers relieve thermal stresses on the tie-rods…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.