| 摘要 |
The hydraulic door closure houses a piston (3) operated by return spring (5) within a cylinder (1) formed with an oil path cooperating with the piston (3) and includes a plug (4) at the inlet of the cylinder. The door closure includes a crank (14) on the lower part of pivoting shaft (11) interlocked with the door, and a return means for back and forth actuating plate (17) combined with a crank pin (15) and piston rod (16) of the crank. The return means comprises a slot (18) formed in the plate (17), return spring (15) for applying compression force to the crank pin (17).
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