Packing having multiple seal portions
US4627624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Nov 12, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86863
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A packing which includes a plurality of seal portions integrally formed on an annular elastic sheet. The seal portions are spaced about the circumference of the sheet and project from one side surface of the sheet. Each seal portion has a through hole extending entirely through the sheet parallel to the center axis of the sheet. In the preferred embodiment, the packing is used in a rotary change-over valve and each seal portion has an annular rib at its free end which is adapted to fit in a corresponding hole in a rotary valve inlet element with the packing held in a recess in the inlet element between the inlet element and a rotary valve outlet element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.