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公开(公告)号：US5669413A
公开(公告)日：1997-09-23
申请号：US636680
申请日：1996-04-23
CPC分类号： G05D16/2093 , F25B41/062 , F25B2341/065 , H01F2007/1684 , Y02B30/72 , Y10T137/8242 , Y10T137/86984
摘要： A valve apparatus for controlling a pressured fluid, in which the shut-off device is force closed by the pressured fluid which is admitted into a chamber via a throttle bore. The valve is opened via a drive means, which acts directly on both a pilot valve and on the shut-off device, without the interposition of an actuating fluid. The drive means first opens a pilot valve, thereby allowing the pressured fluid to escape from the chamber and to the outlet. The drive means then opens the shut-off device. The reduction in pressure in the chamber enables a drive means of only moderate power to complete the second step of opening the shut-off device. The drive means acts directly on the shut-off device; thus the control action corresponds directly to the stroke displacement of the drive means at any particular moment.
摘要翻译： 一种用于控制加压流体的阀装置，其中所述切断装置被经由节流孔进入腔室的加压流体强制关闭。 阀通过驱动装置打开，驱动装置直接作用在先导阀和关闭装置上，而不插入致动流体。 驱动装置首先打开先导阀，从而允许加压流体从腔室和出口排出。 然后，驱动装置打开关闭装置。 腔室中的压力降低使得能够仅驱动中等功率的驱动装置完成打开关闭装置的第二步骤。 驱动装置直接作用在切断装置上; 因此控制动作直接对应于任何特定时刻的驱动装置的行程位移。
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公开(公告)号：US06595233B2
公开(公告)日：2003-07-22
申请号：US09918294
申请日：2001-07-30
申请人： Giuseppe Pulli
发明人： Giuseppe Pulli
IPC分类号： G05D1608
CPC分类号： F04B49/03 , F04B2205/05 , Y10T137/2584 , Y10T137/2587 , Y10T137/2592
摘要： A safety device (1) for a fluid transmission has a diaphragm (4) which is arranged deflectably in a feed passage (8) and which has at least one through opening (2) for the fluid. A return passage (10) for the fluid from the chamber of the consumer (9) is of such a configuration and arrangement that it can be opened and closed by deflection of the diaphragm (4), wherein the diaphragm (4) is of such a configuration that, when the fluid flow in the feed passage (8) falls below a given value, the return passage (10) is opened. The pressure in a pressure chamber (9) of a consumer can be let off by the device (1) when a pump (7) is no longer conveying.
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