Control valve and method of controlling material flow through a conduit
US4925155A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1988 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Jul 14, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/0655
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device and method for regulating the flow of material through a conduit. The device includes a material flow path having a disk member for closing the material flow path, a material bleed path through the disk member when closed and a member for moving the disk and opening the material flow path. The device can further include an additional piston member for closing the material flow path at a secondary position and having an additional material bleed path therethrough and an additional member for moving the piston and opening the flow path as well as a sleeve member movable within the device for releasing material pressure from both within the device and ahead of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.