Electret enhanced automatic IV drip chamber shutoff

Details Electret enhanced automatic IV drip chamber shutoff Electret enhanced automatic IV drip chamber shutoff

2008-03-04

2008-03-04

Mendez, Manuel (Department: 3763)

Surgery

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

Treating material introduced into or removed from body...

Reexamination Certificate

active

11016280

ABSTRACT:
An automatic stop valve formed in a container of a medical fluid administration system includes an electrical field that attracts the float and valve seat together to shut off flow from the exit port of the container when the fluid within the container is reduced to a predetermined level. One or both of the float and valve seat creates an electric field that attracts the other, which is made of a non-magnetic dielectric, into engagement. In one embodiment, the valve seat is formed of an electret that creates the electric field attracting the float to it to stop flow. In another embodiment, the float comprises an electret that attracts the float to the dielectric valve seat. In yet another embodiment, both the float and valve seat include electrets of opposite polarity that attract each other into engagement. The lack of magnetic and metallic materials makes the shut off valve suitable for use in an MRI environment.

REFERENCES:
patent: 3207372 (1965-09-01), Evans
patent: 3731670 (1973-05-01), Loe
patent: 3850189 (1974-11-01), Follett
patent: 4005724 (1977-02-01), Courtot
patent: 4038981 (1977-08-01), LeFevre et al.
patent: 4344004 (1982-08-01), Okubo
patent: 4465095 (1984-08-01), Lindberg
patent: 4489863 (1984-12-01), Horchos et al.
patent: 4585209 (1986-04-01), Aine et al.
patent: 4732162 (1988-03-01), Martell
patent: 5019723 (1991-05-01), Tran
patent: 5118046 (1992-06-01), Tholander
patent: 5280806 (1994-01-01), Glazebrook
patent: 5423346 (1995-06-01), Daoud
patent: 5468142 (1995-11-01), Koziol
patent: 5527295 (1996-06-01), Wing
patent: 5660205 (1997-08-01), Epstein
patent: 6095189 (2000-08-01), Ben-Shalom
patent: 6120002 (2000-09-01), Biegelsen et al.
patent: 6195012 (2001-02-01), Yang
patent: 6213986 (2001-04-01), Darling, Jr.
patent: 6402309 (2002-06-01), Litman
patent: 6676106 (2004-01-01), Swartz et al.
patent: 6695004 (2004-02-01), Raybuck
patent: 6855126 (2005-02-01), Flinchbaugh
patent: 2002/0143292 (2002-10-01), Flinchbaugh
patent: 2002/0182091 (2002-12-01), Potter
patent: 92 05 173.1 (1992-08-01), None
patent: 43 19 115 (1994-12-01), None
patent: 0 250 948 (1988-01-01), None
patent: WO 2004/060457 (2004-07-01), None
G. Sessler, ed.; “ELECTRETS, 3rdedition, vol. 1,”Electrostatic Source Book Catalog, pp. 1-2, http://www.electrostatic.com/Sessler.htm.
R. Gerhard-Multhaupt ed.; “ELECTRETS, 3RDedition, vol. 2,”Electrostatic Source Book Catalog, pp. 1-5, http://www.electrostatic.com/gerhardmult.htm.
N.J. Hermanson et al., “Syndiotactic Polystyrene: A New Polymer for High-Performance Medical Applications,” 1988 Medical Plastics and Biomaterials, pp. 1-7.
A.M. Sabatini et al., “A system for measurement of surface charge densities on tubular electrets,”1990 Meas. Sci. Technol. 1, pp. 1099-1101.
International Search Report—International Application No. PCT/US2005/044763; International Filing Date: Dec. 9, 2005; (Earliest) Priority Date: Dec. 17, 2004.

Affiliated with

Also associated with

Rating

Electret enhanced automatic IV drip chamber shutoff does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electret enhanced automatic IV drip chamber shutoff, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electret enhanced automatic IV drip chamber shutoff will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3958935