Drive system for an infusion pump

Details Drive system for an infusion pump Drive system for an infusion pump

2005-02-15

2005-02-15

Mancene, Gene (Department: 3754)

Dispensing

Automatic control

Motor control

C222S153130, C222S327000, C222S333000, C222S390000, C604S154000

Reexamination Certificate

active

06854620

ABSTRACT:
A pump system for an infusion system includes a linear drive (36, 36′) which minimizes the space occupied by the pump components in a portable housing (10, 10′). A motor (34) and a motor drive shaft (42) are arranged in parallel with, and adjacent to a syringe (14, 14′) and lead screw (94, 94′). A gear box (54) connects the drive shaft and lead screw to transfer rotational movements between them. A piston driving member, such as a cone (116) or drive nut (116′) converts the rotational movement of the lead screw into linear motion of a syringe piston (24). Sensors (150, 152) detect when the piston or cone is in a “home” position and in an “end” position, respectively. Optionally, a proximity sensor (170) is used to ensure that the cone and the piston (24) are abutting during dispensing. Alternatively, a clamping member (350) selectively clamps the lead screw (94′) against linear motion in at least a dispensing direction.

REFERENCES:
patent: 3623474 (1971-11-01), Heilman et al.
patent: 4583974 (1986-04-01), Kokernak
patent: 4952205 (1990-08-01), Mauerer et al.
patent: 5993423 (1999-11-01), Choi
patent: 6659980 (2003-12-01), Moberg et al.

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