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公开(公告)号：US10215202B2
公开(公告)日：2019-02-26
申请号：US15496738
申请日：2017-04-25
申请人： Neil Gordon Stewart
发明人： Neil Gordon Stewart
摘要： An apparatus for seamlessly activating an on-demand function related to a fluid-driven instrument connects to an output of control valve regulating system pressure during normal operation of the instrument. The apparatus includes a fluid-operated bistable circuit that is switchable from a standby mode to an actuating mode by a brief drop in system pressure. In the actuating mode the circuit acts on a switch or valve to activate the function. Turning off system pressure to a longer time returns the circuit to its standby mode. The circuit includes a two-port biased actuator responsive to pressure imbalance between its ports, which are separately pressurizable through, respectively, an actuator-controlled valve and a flow control module.
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公开(公告)号：US20170314585A1
公开(公告)日：2017-11-02
申请号：US15496738
申请日：2017-04-25
申请人： Neil Gordon Stewart
发明人： Neil Gordon Stewart
CPC分类号： F15B21/08 , A61C1/0038 , A61C3/02 , F15B11/10 , F15B15/1476 , F15B15/149 , F15B2211/6654 , F15B2211/7053
摘要： An apparatus for seamlessly activating an on-demand function related to a fluid-driven instrument connects to an output of control valve regulating system pressure during normal operation of the instrument. The apparatus includes a fluid-operated bistable circuit that is switchable from a standby mode to an actuating mode by a brief drop in system pressure. In the actuating mode the circuit acts on a switch or valve to activate the function. Turning off system pressure to a longer time returns the circuit to its standby mode. The circuit includes a two-port biased actuator responsive to pressure imbalance between its ports, which are separately pressurizable through, respectively, an actuator-controlled valve and a flow control module.
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