公开(公告)号：US3623474A

公开(公告)日：1971-11-30

申请号：US3623474D

申请日：1966-07-25

Applicant: MEDRAD INC

Inventor： HEILMAN MARLIN S ,  JONES DONALD

IPC: A61B6/00 ,  A61M5/145

CPC classification number: A61B6/504 ,  A61B6/481 ,  A61M5/14546 ,  A61M5/14566 ,  A61M2005/14553

Abstract: An angiographic injector system for producing a controlled rate of flow of injection fluid is described. The injector has a motor-driven piston for ejecting fluid from a syringe cartridge contained within a pressure jacket. The drive motor is operated in accordance with a command voltage which is proportional to the desired rate of flow. Sensing means detects the actual rate of flow and comparison means provides an error signal which controls the motor. Compensating means allow a single control system to operate the drive motor in conjunction with syringes of various sizes, and a tripping circuit halts the motor if the flow rate exceeds the selected rate.