| 摘要 |
PCT No. PCT/SE79/00010 Sec. 371 Date Sep. 19, 1979 Sec. 102(e) Date Sep. 6, 1979 PCT Filed Jan. 16, 1979 PCT Pub. No. WO79/00531 PCT Pub. Date Aug. 9, 1979.A hydraulic nailing pistol with force or energy-accumulators for reciprocally driving a nail driver (5) formed as a piston with associated piston rod (5). The outer end of the rod is intended for applying to the nail head of the nail to be driven. The piston is arranged in a hydraulic cylinder (26) and the end of the cylinder facing away from the nailing end of the rod is connected, by the intermediary of an openable and closeable valve (3), to a first hydraulic operating cylinder (A) provided with a piston (4), actuable by a force or energy-accumulating component, e.g. a spring (6). The other end of the hydraulic cylinder (26) is connected to a second hydraulic operating cylinder (B), provided with a piston (11), also actuable by a force or energy-accumulating component, e.g. a spring (12). The first operating cylinder (A) with its cylinder (4) is adapted for driving the driver forwards, and the second operating cylinder (B) with its piston (11) is adapted for providing the return movement of the driver (5). By making the pistol in the fashion described, all functions are built into the movable portion of the pistol with simple means, while retaining small dimensions and comfortably low weight, at the same time as the tool develops greater power during nailing.
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