Power cylinder non-metallic liner seal assembly
US6395359B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1997 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Aug 13, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Corrosion resistance is provided for a power cylinder by providing a preloaded molded urethane elastomer sleeve liner within an outer cylinder of material such as a copper/nickel alloy which is subject to corrosion from long-term exposure to ambient fluids such as sea water. Preloading is preferably provided by thermal shrink fitting of the molded urethane sleeve liner to the inner bore of an outer metal cylinder. Preloading of a structure which has high structural integrity and low permeability thus effectively prevents incursion of fluids and gases at the interface between the outer cylinder and the sleeve liner as well as providing a surface which can be machined to a high degree of smoothness and against which reciprocating piston seals and wear assemblies can directly ride and which is resistant to abrasion therefrom even at high piston speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.