Patent ID: 11905981
Assignee: GJR MEYER SERVICE, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H  E | IPC F

Claim 5:
6. A system for maintaining hydraulic pressure at a hydraulic accumulator, the system comprising:
a pressure sensor electrically coupled to a control unit;
a check valve hydraulically coupled to the pressure sensor through a first hydraulic connector;
a pump hydraulically coupled to the check valve through a second hydraulic connector and electrically coupled to the control unit;
an unloader valve hydraulically connected to the pump through the second hydraulic connector and electrically coupled to the control unit; and
a tank hydraulically connected to the unloader valve through a third hydraulic connector and hydraulically connected to the pump through a fourth hydraulic connector;
wherein the pressure sensor is configured to mechanically detect a pressure at the first hydraulic connector,
the pressure sensor is further configured to transmit an electrical signal to the control unit when the pressure at the first hydraulic connector falls below a first threshold,
the control unit is configured to control the pump to urge, at a first time, hydraulic fluid through the check valve into the first hydraulic connector through the second hydraulic connector when the control unit receives the electrical signal
the control unit is further configured to close the unloader valve at a second time,
the second time is subsequent to the first time, and
wherein the control unit is further configured to control the unloader valve to reduce a rate at which the unloader valve transmits fluid received through the second hydraulic connector to the tank through the third hydraulic connector over a period commencing at a third time and ending at the second time.