| 摘要 |
PCT No. PCT/FR84/00099 Sec. 371 Date Dec. 11, 1984 Sec. 102(e) Date Dec. 11, 1984 PCT Filed Apr. 11, 1984 PCT Pub. No. WO84/04138 PCT Pub. Date Oct. 25, 1984.Automatic device for economizing compressed air comprises a means for ensuring the passage of driving fluid under pressure during most of the stroke of the moving element of a user apparatus. The device consists of a single-unit body having a first circuit connecting a fluid supply pipe to one chamber of the cylinder actuator. The first circuit is controlled by a valve moving with a piston subjected to the action of an elastic means and slidably mounted in the body. The piston is actuated by the presence or absence of a pressure signal, the body having a second circuit by-passing the first circuit and connecting a fluid exhaust pipe to the cylinder chamber.
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