Improved spirally-formed seal for shafts and valve stems
US5301960A · kind A · utility
10Cited by
18References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1992 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Apr 30, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/101
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A packing material for formation of a seal for a rotary or reciprocating shaft is disclosed wherein a core element is enveloped by a sheet of expanded graphite material. The core element is preferably formed of a wire mesh and solid graphite. The enveloping process is accomplished in such a manner as to wrap the core element with a self-lubricating surface material. The packing material of the present invention provides the advantages of graphite packings and metallic core packings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.