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    • 9. 发明授权
    • Direct current motor safety circuits for fluid delivery systems
    • 用于流体输送系统的直流马达安全回路
    • US06259587B1
    • 2001-07-10
    • US09335008
    • 1999-06-17
    • Moberg SheldonJames D. CauseyHerman Lee Renger
    • Moberg SheldonJames D. CauseyHerman Lee Renger
    • H02H504
    • H02P7/288A61M5/16831H02H7/0844
    • A safety circuit system for a DC driven device for use with a fluid delivery system includes a first voltage potential DC power line, a second voltage potential DC power line, a controller and a safety circuit. The first voltage potential DC power line is coupled to provide a first voltage potential to the DC driven device, and the second voltage potential DC power line is coupled to provide a second voltage potential to the DC driven device such that the second voltage potential is different relative to the first potential. The controller controls at least the first voltage potential on the first voltage potential DC power line. The safety circuit has an enable state and a disable state, in which the default state is the disable state. The safety circuit is coupled to the controller, and the controller controls the safety circuit to place the safety circuit in the enable state independently of controlling the first voltage potential on the first voltage potential DC power line. The safety circuit is operatively coupled to at least one of the first and second voltage potential DC power lines to inhibit DC flow and operation of the DC driven device when the safety circuit is in the disable state and to permit DC flow and operation of the DC driven device when the safety circuit is in the enable state such that the operation of the DC driven device will occur when the safety circuit is in the enable state. In one version the DC driven device is a DC motor in an infusion pump, while in other versions the DC driven device is a gas generator in an infusion pump. Preferably, the safety circuit is controlled by an AC signal from the controller such that the safety circuit is enabled by the AC signal to permit DC flow and enable the forward motion of the DC motor while the AC signal is provided by the controller.
    • 用于与流体输送系统一起使用的直流驱动装置的安全电路系统包括第一电压电位直流电力线,第二电压电位直流电力线,控制器和安全电路。 第一电压电位DC电源线被耦合以向DC驱动装置提供第一电压电位,并且第二电压电位DC电力线被耦合以向DC驱动装置提供第二电压电位,使得第二电压电位不同 相对于第一个潜力。 控制器至少控制第一电压电位直流电力线上的第一电压电位。 安全电路具有使能状态和禁止状态,其中默认状态是禁用状态。 安全电路耦合到控制器,并且控制器控制安全电路以将安全电路置于使能状态,而与控制第一电压电位直流电源线上的第一电压电位无关。 安全电路可操作地耦合到第一和第二电压电压直流电力线中的至少一个,以在安全电路处于禁用状态时禁止DC驱动装置的DC流动和操作,并且允许DC流动和DC的操作 当安全电路处于使能状态时,当安全电路处于使能状态时,直流驱动装置的动作将发生。 在一个版本中,直流驱动装置是输液泵中的直流电动机,而在其他形式中,直流驱动装置是输液泵中的气体发生器。 优选地,安全电路由来自控制器的AC信号控制,使得安全电路由AC信号启用以允许DC流动,并且在由控制器提供AC信号的同时启用DC电机的向前运动。