Pump seal with curved backup plate
US4637295A · kind A · utility
Inventors
Key dates
| Filing date | Apr 9, 1985 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Apr 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/944
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump seal is provided for use in a pump suited to move high viscosity and abrasive materials. A piston in the pump has a substantial amount of clearance relative to the cylinders in which it operates with the seal providing substantially the only contact in sealing between the piston and the cylinders. The seal is formed of a relatively soft, elastomeric material which is normally of a plainer, annular shape. Along with a rigid annular ring plate, the elastic ring is sandwiched between the closure member and housing member. The ring plate has a curved surface facing the closure member which serves to backup and support the relatively soft elastic ring under pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.