| 摘要 |
A speargun apparatus includes a rearward stock portion including a spear engaging structure; a forward stock portion including a speargun body and sling mount and a spear propulsion sling; and a hydraulic drive mechanism interconnecting the rearward stock portion and the forward stock portion for separating the rearward stock portion and the forward stock portion to increase tension in the sling. The forward stock portion preferably includes a longitudinal passageway and the rearward stock portion preferably includes a forwardly protruding guide rod slidably fitting into the longitudinal passageway for strengthening and stabilizing the apparatus when the forward stock portion and the rearward stock portion are separated. The rearward stock portion preferably includes the hydraulic drive mechanism base containing a fluid accumulation reservoir, a plunger slidably extensible from the base under pressure of hydraulic fluid within the reservoir, and a fluid pump for delivering fluid into the reservoir under pressure greater than atmospheric pressure. The rearward stock portion preferably contains a cavity and the base is retained within the cavity, and the plunger has a plunger forward end and the plunger forward end is preferably secured to the forward stock portion.
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