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Medical injector

  • US 3,156,236 A
  • Filed: 12/07/1961
  • Issued: 11/10/1964
  • Est. Priority Date: 12/07/1961
  • Status: Expired due to Term
First Claim
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1. AN INJECTION DEVICE FOR PROVIDING CONSTANT HYDRAULIC PRESSURE SUITABLE FOR ANGIOGRAPHY INJECTIONS COMPRISING:

  • A CONSTANT TORQUE ELECTRIC MOTOR;

    MEANS FOR EFFICIENTLY CONVERTING THE CONSTANT TORQUE AVAILABLE FROM SAID MOTOR TO CONSTANT THRUST;

    AND A HYDRAULIC PISTON AND CYLINDER, THE PISTON OF WHICH IS DRIVEN BY SAID MEANS WHEREBY ENERGIZATION OF SAID MOTOR TO PRODUCE CONSTANT TORQUE WILL PROVIDE CONSTANT PRESSURE IN A HYDRAULIC MEDIUM CONTAINED IN SAID CYLINDER.

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