| 摘要 |
<p>1522946 Hydraulic control circuits CATERPILLAR TRACTOR CO 13 April 1977 [7 Sept 1976] 15323/77 Heading F1P [Also in Division F2] In a hydraulic circuit, a coupling 21, Fig. 2, is provided which depressurizes the system through a vent 35 as soon as a seal between members 29, 34 is broken by partially unscrewing a sleeve 32. Fig. 3 (not shown), illustrates an embodiment with a different sealing arrangement. As described the coupling is used in a circuit, Fig. 1 (not shown) which includes an accumulator.</p> |
