Patent ID: 11865051
Assignee: STRYKER CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC A  F | IPC A  F

Claim 13:
14. A patient handling apparatus comprising:
a hydraulic circuit and a hydraulic cylinder to raise or lower a component of the patient handling apparatus;
a pump;
a reservoir; and
said hydraulic cylinder having a rod, a cap end chamber, and a rod end chamber, said hydraulic circuit having a control valve assembly operable to direct the flow of hydraulic fluid between said pump, said hydraulic cylinder, and said reservoir, and said control valve assembly further configured to selectively open fluid communication between a first chamber of said cap end and rod end chambers of said hydraulic cylinder and said reservoir based on the flow condition of the hydraulic fluid flowing to a second chamber of said cap end and rod end chambers of said hydraulic cylinder to thereby allow faster evacuation of the hydraulic fluid from said first chamber of said hydraulic cylinder but to maintain flow through said control valve assembly between said pump and said second chamber of said hydraulic cylinder during operational flow conditions.