Patent ID: 11896502
Assignee: OSSUR ICELAND EHF
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 18:
19. A prosthetic knee comprising:
a controller; and
a hydraulic unit pivotally connected to the controller, the hydraulic unit including:
a hydraulic cylinder having a lower hydraulic compartment;
a brake hydraulic cylinder; and
a flow system fluidly connecting the hydraulic cylinder and the brake hydraulic cylinder;

wherein the brake hydraulic cylinder includes a block valve in a first component of the brake hydraulic cylinder and a brake-initiating valve in a second component of the brake hydraulic cylinder;
wherein each of the block valve and the brake-initiating valve are biased directly against an adjusting valve having first and second guiding surfaces, the first guiding surface matches a contact end of the block valve, and the second guiding surface matches a contact end of the brake-initiating valve.