Fluid propulsion device for use in a projectile launching system
US6053157A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1998 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Mar 23, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41B11/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A fluid propulsion device is used to discharge a working fluid at a predemined variable discharge rate. The fluid propulsion device includes a fluid chamber that is expandable upon receiving the working fluid. The fluid chamber has a plurality of chamber sections that contract at different predetermined rates to discharge the working fluid from the fluid chamber at the variable discharge rate. In one example, an elastomeric bladder defines the fluid chamber and includes a plurality of bladder sections each having a different coefficient of elasticity, causing the bladder sections to contract at the different predetermined rates. In one application, the fluid propulsion device is used in a projectile launching system, such as an airgun. The fluid propulsion system controls the launching of the projectile by discharging the working fluid at the variable discharge rate, resulting in a corresponding acceleration of the projectile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.