Patent ID: 11859724
Assignee: LONTRA LIMITED
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A check valve comprising an obturator and a biasing mechanism, the biasing mechanism arranged to urge the obturator towards a closed condition;
the check valve further comprising an actuator assembly which is arranged to be selectively activated to cause the obturator to be in a more fully open condition from a less open position, when the actuator assembly is activated the actuator assembly is arranged in use to override the biasing mechanism, and a controller arranged to maintain the activation of the actuator assembly to hold the obturator in an open condition during operation of a fluid displacement device to urge fluid through a fluid port of the device, which fluid port the check valve is connected to;
the check valve comprising the controller which has a control signal input to cause the controller to selectively activate the actuator assembly, where the control signal is indicative of one of the obturator being in the less open condition caused by fluid flow and fluid flow to the obturator, and where the controller is further arranged to de-activate the actuator assembly in response to receipt of a control input which is indicative of either a depowering of the fluid displacement device or of a change in operational status of the fluid displacement device from an operational condition to a non-operational condition.