Syringe pump having a piston brake
First Claim
1. A syringe pump comprising a syringe holder for holding a syringe cylinder of a syringe, a syringe holding head, a device for sizing the syringe cylinder, a drive head for engaging a piston plate of a piston rod located inside the syringe, the drive head being carried by a drive rod extending parallel to the syringe on a first side of the syringe when the syringe is inserted, and a brake element, transversely movable to a longitudinal direction defined by a lengthwise direction of the syringe when the syringe is inserted,wherein a portion of the syringe holding head engages the syringe cylinder on a second side of the syringe opposite the drive rod on the first side;
- andwherein the brake element is provided on the syringe holding head and configured to press toward a syringe bearing arranged on the first side to move into contact with the piston rod for controlling forward movement of the piston rod.
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Accused Products
Abstract
The syringe pump comprises a receiving position for a syringe. The piston plate of the syringe is moved by a drive head which is fastened to a drive rod. For locking the piston rod prior to fixing the piston plate in the drive head, a braking element is provided on a syringe holding head. The syringe holding head further serves for determining the respective syringe size. After placing the syringe holding head against a syringe cylinder, the brake element is actuated to temporarily engage the piston rod and fix it relatively to the syringe cylinder.
15 Citations
17 Claims
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1. A syringe pump comprising a syringe holder for holding a syringe cylinder of a syringe, a syringe holding head, a device for sizing the syringe cylinder, a drive head for engaging a piston plate of a piston rod located inside the syringe, the drive head being carried by a drive rod extending parallel to the syringe on a first side of the syringe when the syringe is inserted, and a brake element, transversely movable to a longitudinal direction defined by a lengthwise direction of the syringe when the syringe is inserted,
wherein a portion of the syringe holding head engages the syringe cylinder on a second side of the syringe opposite the drive rod on the first side; - and
wherein the brake element is provided on the syringe holding head and configured to press toward a syringe bearing arranged on the first side to move into contact with the piston rod for controlling forward movement of the piston rod. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A syringe pump comprising a syringe holder for holding a syringe cylinder of a syringe, a drive head for engaging a piston plate of a piston rod of the syringe, the drive head being carried by a drive rod extending parallel to the syringe cylinder when the syringe is positioned in the syringe holder, and a brake element transversely movable to longitudinal direction of the syringe towards the drive rod to engage the piston rod,
a syringe holding head for pressing the syringe cylinder against a syringe bearing, wherein the brake element is positioned, at least partially, in the syringe holding head.
Specification