Liquid injector in which a device for detecting the pressure exerted upon the liquid syringe piston is not arranged on a movable part
First Claim
1. A liquid injector wherein a piston is freely slidably inserted into a cylinder that is filled with a liquid and wherein said cylinder and said piston are moved relative to each other to thus inject said liquid into a patient;
- said liquid injector comprising;
a cylinder-holding structure for detachably holding said cylinder;
a piston-driving mechanism for applying pressure to at least said piston to press said piston into said cylinder;
an injector main body to which said cylinder-holding structure is fixed and which supports said piston-driving mechanism displaceably in the direction of sliding of said piston; and
a stress detection means that is fixed to this injector main body for detecting stress that acts upon said piston-driving mechanism that applies pressure against said piston.
1 Assignment
0 Petitions
Accused Products
Abstract
In a liquid injector, a piston is pressed by a piston-driving mechanism into a cylinder of a liquid syringe that is held by a cylinder-holding structure, and a stress detection means detects the stress of this pressure. The piston-driving mechanism is displaceably supported by the main body of the injector, and the stress detection means, which is fixed to this injector main body, detects the stress that acts upon the piston-driving mechanism. The configuration of this liquid injector is simple because the stress detection means is not arranged on the movable part of the piston-driving mechanism, and the liquid injector therefore exhibits improved productivity and reliability.
-
Citations
16 Claims
-
1. A liquid injector wherein a piston is freely slidably inserted into a cylinder that is filled with a liquid and wherein said cylinder and said piston are moved relative to each other to thus inject said liquid into a patient;
- said liquid injector comprising;
a cylinder-holding structure for detachably holding said cylinder;
a piston-driving mechanism for applying pressure to at least said piston to press said piston into said cylinder;
an injector main body to which said cylinder-holding structure is fixed and which supports said piston-driving mechanism displaceably in the direction of sliding of said piston; and
a stress detection means that is fixed to this injector main body for detecting stress that acts upon said piston-driving mechanism that applies pressure against said piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- said liquid injector comprising;
Specification