Automatic valve actuator and control system
US4679764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1984 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Aug 6, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve actuator control system, although suitable for many control functions, is especially adapted for remote control of plug-type valves utilizes a unique configuration providing a unitary explosion-proof container to house all electrical components and also providing a manifold assembly that is adapted for either a hydraulic or pneumatic actuator motor with relatively minor modification. The manifold assembly is designed to accept all utilized control valves, relief valves, check valves, flow control devices, and manually operable override controls thereby simplifying installation and maintenance and reducing attendent costs. Three independent solenoid valves, responsive to mechanical feedback provided through the plug-valve's operating stem and integrated into the manifold within the explosion-proof container, provide for actuator motor control including a novel dual speed capability for enhancing plug-valve performance while precluding costly premature wear. A unique manual override safety feature comprising automatic motor power bypass within the manifold, assures personal safety despite unexpected reapplication of previously interrupted electrical and hydraulic or pneumatic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.