| 摘要 |
Apparatus 2 for firing a product 4, which apparatus comprises a body portion 8, a discharge chamber 10 in the body portion, and an elongate member 12 which is slidable in the body portion, and the apparatus being such that the elongate member is caused to slide in the body portion by a fluid. The apparatus may include first means, such as coil springs 14, for moving the elongate member to a non-firing position, and second means 16 for moving the elongate member to a firing position, such as gas introduced into a discharge chamber 10. The elongate member moves from the non-firing position to the firing position when pressure from the second means exceeds pressure from the first means. The apparatus may be a gun for firing a bullet, staple, rivet, harpoon or dart. It may also be used in the needleless injection of medical products into a human or animal body (Figure 3). A pressure regulating valve is also disclosed (Figure 2). |
