Patent · US Expired

Hydraulically actuated cardiac prosthesis and method of actuation

US4369530A · kind A · utility

25Cited by
40References
56Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 19, 1981
Grant dateJan 25, 1983
Priority date—
Expiry dateMay 19, 2001

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61M2205/8243
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

A cardiac prosthesis having a hydraulically actuated compressible blood pump. An actuation chamber adjacent the blood pump receives pulses of hydraulic actuation fluid from an actuator pump through a fluid inlet path to compress the blood pump during systole and eject blood therefrom. Between pulses the actuation fluid is permitted to drain from the actuation chamber through an outlet path into a reservoir. Discharge of fluid through the outlet path is controlled by a dump valve which is adapted to close or open the outlet path primarily in response to forces which vary as a function of the flow of actuation fluid through the fluid inlet path.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.