| 摘要 |
<p>PCT No. PCT/AT92/00012 Sec. 371 Date Aug. 2, 1993 Sec. 102(e) Date Aug. 2, 1993 PCT Filed Feb. 5, 1992 PCT Pub. No. WO92/14085 PCT Pub. Date Aug. 20, 1992.Pressure compensated cartridge valve with a valve housing (1, 2) in which is axially guided a valve stem (10) which at one of its ends is provided with a valve cone (12) the sealing surface (13) of which in the closed position engages an annular rim (15) formed at the inside of the housing, whereby an annular chamber (20) provided between valve stem (10) and housing on one side of the annular chamber constituted one pressure connection of the valve by way of connecting bore (21), and the port chamber (13) of the housing bore (9) receiving the valve stem (10) constitutes a further pressure connection of the valve on the other side of the annular rim (15), and whereby a pressure balance bore (23) connects the port chamber (19) with a counter pressure chamber (24) within the valve housing (1, 2) which counter pressure chamber surrounds the end of the valve stem remote from the valve cone (12), and whereby the pressure balance bore (23) extends within the valve housing (1, 2) and a channel (36) connecting the annular chamber (20) with the port chamber (19) is formed within the valve stem (10), the opening (37) towards the port chamber (19) of which is closed by a spring biased ball seal (45, 40) or a spring biased cone seal (40).</p> |
