Water-armed/air-safed release apparatus
US4395951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1981 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Feb 2, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/006
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved release apparatus, including an actuator device, a release dee and a firing device, releases the firing device in a water environment and not in an air environment when the actuator device is remotely actuated. When in a water environment, a predetermined gas pressure from the actuator device drives forward a pusher piston and valve sleeve arrangement, disposed in a water chamber of the release device, initially to close off lower entry/exit orifices in the water chamber by action of the valve sleeve, and then to compress an entrapped column of water to a predetermined water pressure sufficiently to cause shearing off of an annular lip of a ball lock piston thereby separating the firing device from the release device. When in an air environment, the pressure from a compressed entrapped air column is not sufficient to cause shearing off or folding down of the annular lip of the ball lock piston, and, accordingly, the release apparatus is safed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.