Liquid injection system for detecting when piston pusher of liquid injector grips piston flange of liquid syringe
First Claim
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1. A liquid injection system comprising:
- a liquid syringe having a cylinder with a cylinder flange disposed on and around an end thereof and a piston slidably inserted in said cylinder and having a piston flange disposed on and around an end thereof; and
a liquid injector for holding and moving at least said cylinder flange and said piston flange relatively to each other;
said liquid injector comprising a cylinder gripping mechanism for gripping said cylinder such that said cylinder has a longitudinal direction oriented forwardly and rearwardly, a piston pusher supported slidably in forward and rearward directions for pushing said piston at least forwardly, a pair of engaging claws laterally openably and closably mounted on said piston pusher for individually engaging left and right edges of a front face of said piston flange, and gripping detecting means for detecting when said piston flange is gripped by said engaging claws.
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Abstract
A liquid injector has a gripping detector disposed on the front face of a piston pusher for detecting when a piston is pushed by the piston pusher for thereby detecting when a piston flange on the piston is gripped by a pair of engaging claws on the piston pusher. The piston pusher is prevented from being actuated when the piston flange is not gripped by the engaging claws.
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Citations
32 Claims
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1. A liquid injection system comprising:
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a liquid syringe having a cylinder with a cylinder flange disposed on and around an end thereof and a piston slidably inserted in said cylinder and having a piston flange disposed on and around an end thereof; and
a liquid injector for holding and moving at least said cylinder flange and said piston flange relatively to each other;
said liquid injector comprising a cylinder gripping mechanism for gripping said cylinder such that said cylinder has a longitudinal direction oriented forwardly and rearwardly, a piston pusher supported slidably in forward and rearward directions for pushing said piston at least forwardly, a pair of engaging claws laterally openably and closably mounted on said piston pusher for individually engaging left and right edges of a front face of said piston flange, and gripping detecting means for detecting when said piston flange is gripped by said engaging claws. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 25, 26, 27, 28, 29, 30, 31, 32)
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22. A liquid injector for injecting a liquid from a liquid syringe having a cylinder with a cylinder flange disposed on and around an end thereof and a piston slidably inserted in said cylinder and having a piston flange disposed on and around an end thereof, said liquid injector being arranged to hold and move at least said cylinder flange and said piston flange relatively to each other, said liquid injector comprising:
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a cylinder gripping mechanism for gripping said cylinder such that said cylinder has a longitudinal direction oriented forwardly and rearwardly;
a piston pusher supported slidably in forward and rearward directions for pushing said piston at least forwardly;
a pair of engaging claws laterally openably and closably mounted on said piston pusher for individually engaging left and right edges of a front face of said piston flange; and
gripping detecting means for detecting when said piston flange is gripped by said engaging claws. - View Dependent Claims (23, 24)
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Specification