System for eliminating or reducing static electricity in infusion pumping systems

Patent 5127907 Issued on July 7, 1992. Estimated Expiration Date:

December 6, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Body electrical grounding tether
Patent #: 4475141
Issued on: 10/02/1984
Inventor: Antonevich

Woven stretchable grounding strap
Patent #: 4577256
Issued on: 03/18/1986
Inventor: Breidegam

Corona generating device
Patent #: 4585320
Issued on: 04/29/1986
Inventor: Altavela , et al.

Flow monitoring device
Patent #: 4627840
Issued on: 12/09/1986
Inventor: Cuadra , et al.

Infusion system having plural fluid input ports and at least one patient output port
Patent #: 4696671
Issued on: 09/29/1987
Inventor: Epstein , et al.

Non-reloadable syringe
Patent #: 4731068
Issued on: 03/15/1988
Inventor: Hesse

Adjustable volume pipette sampler
Patent #: 4744955
Issued on: 05/17/1988
Inventor: Shapiro

Vacuum cleaner electrostatic build up control system Patent #: 4866565
Issued on: 09/12/1989
Inventor: Wray, Jr.

Inventors

Application

No. 623200 filed on 12/06/1990

US Classes:

604/151, Material impelled by pump361/212, DISCHARGING OR PREVENTING ACCUMULATION OF ELECTRIC CHARGE (E.G., STATIC ELECTRICITY)604/218With piston or plunger for expelling material from body or injector reservoir

Examiners

Primary: Hirsch, Paul J.

Attorney, Agent or Firm

Weingarten, Schurgin, Gagnebin & Hayes

International Class

A61M 005/20

Abstract

A system for eliminating or reducing static electricity in infusion pumping systems which may cause artifacts in electrocardiograms is disclosed. Infusion pumping systems deliver prescribed infusates to a patient. Frequently, such infusion systems are used in conjunction with electrocardiogram monitors. Static electricity generated at or by the infusion pumping system may cause artifacts in the electrocardiogram monitor. The present invention reduces or eliminates this static electricity by forming parts in relative motion of a similar material to reduce generation of static electric charges. The pumping piston and diaphragm wall of a pumping chamber may be formed from a similar material. The valve pistons and valve diaphragms may be formed of a similar material. The removable pumping cassette and cassette receiver may be formed from a similar material. The present invention also reduces the formation of static electric charges by coating the cassette with an antistatic material. In a further embodiment of the present invention, the fluid flow line may include an electrical conductor connected to a ground.