Hydraulic booster device for linear actuator
US5205200A · kind A · utility
212Cited by
6References
11Claims
0Family size
Inventor
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S91/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A linear actuator used in moving, for example, gate valves, sluice gates and the like, wherein an increased thrust is required during initial movement. The present invention includes, as part of the linear actuator, a novel booster piston movably disposed about a piston rod; further included on the booster piston is a thrust column disposed radially between the booster piston and the piston rod so as to define an annular fluid channel for enabling fluid to move upwardly so as to contribute a substantial additional thrust component to move the primary piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.