Seal
US6199870A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K3/207
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A seal for a shut-off device moved in a rectilinear manner, which is switched from a closed to an open position and vice versa so as to shut off material flows. The seal is formed of metallic components which define a pressure chamber to which external pressure can be applied to achieve seal tightness. Employing only metallic components makes it possible to use the seal in a wide temperature range and under conditions of exceptional wear caused by either frequent actuation or the composition of the flowing medium. The sealing system includes a shut-off device (1) against which a movable seat (5) forms a seal. The seat is connected to the tubular casing (2) in a pressure tight manner, and the casing in turn is connected to a flange (3). The assembly is connected to a housing (8) by a flange (6) and is sealed by seal (7). Membranes (9, 10) and support plate (14) form a pressure chamber (11) to which pressure P.sub.s is applied through connecting nipple (13) and bores (12). Pressure P.sub.b acts in pressurized space (69), and pressure P.sub.g in pressurized space (70). The pressure duct inside casing (2) between connecting nipple (13) and bores (12) is formed by plate (15) which is co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.