| 摘要 |
A pressure compensating device for compensating fluid pressure within a sealed enclosure comprises a cylinder divided into a first chamber and a second chamber by a piston, wherein: the first chamber communicates with the enclosure and the second chamber communicates with the environment; the piston is arranged to adjust the relative volumes of the first and second chambers in response to a difference in pressure between the said chambers by moving within the cylinder; and the piston is arranged to allow fluid communication between the enclosure and the environment when the piston is in at least one position within the cylinder. |
