Actuator
US5914023A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 29, 1998 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Jun 29, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B21/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An actuator assembly comprises a piston within an actuating cylinder, and a valve for controlling the flow of actuating fluid to the first side of the piston. When the valve is actuated the flow of fluid to the first side of the piston is stopped and the pressure of the actuating fluid on the piston is sufficient to maintain the piston in a predetermined position along the stroke path. Also disclosed is a method of actuating the crust breaker of a smelter pot using the apparatus described. Fluid leakage through the piston rod sealing assembly is reduced; the volume of compressed air used by the smelter is reduced; and the working life of the actuator is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.