Underwater signalling devices
US6755147B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Nov 21, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K1/068
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A signalling device (10) adapted to make a percussive sound, for example, under water. The signalling device (10) may be attached to a pressurized fluid source, such as a diver's compressed air supply, the device (10) including: a housing (12) having a passageway (22), at least in part, for communication with the fluid source; a valve member (34) located in the passageway (22) and movable between a closed position in which it substantially blocks the passageway (22), and an open position in which fluid may flow through the passageway (22); biasing means (42), such as a spring, biasing the valve member (34) towards the closed position, wherein the valve member (34) reciprocates between the open and closed positions when a pressure difference above a set value exists on either of the valve member (34) to produce a perscussive sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.