Spear gun having air valve formed by inner and outer barrel
US4660315A · kind A · utility
6Cited by
5References
10Claims
0Family size
Inventor
Key dates
| Filing date | Jun 17, 1986 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Jun 17, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K81/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A spear gun preferably operated from the low pressure gas outlet of a diver's air tank. The gun includes a first barrel over which a second barrel is slidably mounted. A gas inlet is mounted on the second barrel which in turn is normally forwardly positioned in a first non-firing position. Retraction of the second barrel acts as a slide valve to permit gas to enter the first barrel and force an arrow, etc. outwardly therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.