Environmentally sealed combustion powered linear actuator
US9238967B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2012 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Sep 26, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A combustion powered linear actuator features an actuator body having a first chamber therein and a power piston mounted in the first chamber movable between retracted and extended positions. The power piston has a combustion chamber therein. A first seal about the piston seals the piston with respect to the actuator body. A vent region in the body of increased diameter allows exhaust gases to bypass the first seal and flow into a space between the piston and the actuator body and to then vent out of the actuator body. A second seal proximate the distal end of the actuator body cooperates with another piston seal to seal the annular region when the piston is retracted. The vent region may include a vent gland in the first chamber about the piston defining a vent chamber between the actuator body and the vent gland.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.