Medical injector
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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1 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.
- A CONSTANT TORQUE ELECTRIC MOTOR;
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Current AssigneeDonald E. Williamson
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Original AssigneeDonald E. Williamson
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InventorsWilliamson, Donald E.
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Application NumberUS04/157,792Time in Patent Office1,069 DaysField of SearchUS Class Current600/432CPC Class CodesA61M 2230/06 Heartbeat rate onlyA61M 5/1452 pressurised by means of pis...A61M 5/16854 by monitoring line pressureY10S 128/01 Motorized syringe
