Syringe pumps

Details Syringe pumps Syringe pumps

2005-11-22

2005-11-22

Hayes, Michael J. (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C604S067000

Reexamination Certificate

active

06966895

ABSTRACT:
A syringe pump has a motor rotating a leadscrew to drive a plunger head actuator along it. The head actuator engages the plunger of a syringe and moves the plunger along the syringe barrel to dispense medication. An optical encoder mounted on the leadscrew is rotated by the motor to produce a pulse output. A control unit times the interval between the pulses and compares these timings with a stored value representative of a predetermined multiple of the minimum time. If the head actuator is obstructed, the speed of rotation of the motor is slowed and the time interval between pulses rises. When this exceeds the stored value, the control unit stops the drive to the head actuator and generates an alarm.

REFERENCES:
patent: 3623474 (1971-11-01), Heilman et al.
patent: 3701345 (1972-10-01), Heilman et al.
patent: 3985133 (1976-10-01), Jenkins et al.
patent: 4435173 (1984-03-01), Siposs et al.
patent: 4475666 (1984-10-01), Bilbrey et al.
patent: 4529401 (1985-07-01), Leslie et al.
patent: 4812724 (1989-03-01), Langer et al.
patent: 4833384 (1989-05-01), Munro et al.
patent: 4952205 (1990-08-01), Mauerer et al.
patent: 5176502 (1993-01-01), Sanderson et al.

Affiliated with

Also associated with

Rating

Syringe pumps does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Syringe pumps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Syringe pumps will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3498511