DIRECTLY ENGAGED SYRINGE DRIVER SYSTEM
1 Assignment
0 Petitions
Accused Products
Abstract
A syringe driver system comprises a rotatable threaded lead screw shaft and a plunger which directly engages the threaded shaft such that rotation of the shaft drives the plunger into the syringe body. The plunger is formed with a threaded shaft engaging portion in the form of a half nut to engage with and follow the threaded shaft. The syringe driver system further comprises a guide system to secure the plunger in direct engagement with the threaded shaft and to prevent rotation of the plunger. An arm of the plunger stem carries markers useful in determining the near end of infusion. The syringe body carries a marker or markers useful in determining a characteristic about the syringe, such as its volume.
23 Citations
46 Claims
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1-19. -19. (canceled)
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20. A system for infusing fluid, said system comprising:
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a rotatable threaded shaft; a syringe having a syringe body and plunger which directly engages the threaded shaft such that rotation of the shaft drives the plunger into the syringe; a guide system for securing the plunger in direct engagement with the threaded shaft; and a casing having a cover and a base for accommodating the threaded shaft, syringe, and guide system. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A plunger for engaging a threaded shaft and for expelling fluid from a syringe body, said plunger comprising:
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a plunger stem having a distal end and a proximal end; a stopper positioned at the distal end of the stem, the stopper sized to fit within the syringe body; and a flange positioned at the proximal end of the stem, the flange having a threaded portion sized to engage the threaded shaft. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46-56. -56. (canceled)
Specification