Pumps – With signal – indicator – or inspection means
Patent
1995-02-15
1997-08-19
Thorpe, Timothy
Pumps
With signal, indicator, or inspection means
417479, 73 191, F04B 4900
Patent
active
056581335
ABSTRACT:
A medical infusion pump (10) for delivering liquids to a patient includes an elastomeric pump chamber (140) contractable between a refill position and a discharge position. An inlet valve (122) is operatively associated with an elastomeric inlet (142) supplying liquid to the pump chamber (140). The inlet valve (122) is selectively positionable in an open position permitting and a closed position preventing flow of liquid between the inlet (142) and the pump chamber (142). An outlet valve (124) is operatively associated with an elastomeric outlet (144) which conveys liquid from the pump chamber (140). The outlet valve (124) is selectively positionable in an open position permitting and a closed position preventing flow of liquid between the outlet (144) and pump chamber (140). A pump motor (256) and associated plunger (120) contracts and expands the pump chamber (140) between the refill position and the discharge position. An electronic control (542) operatively associated with the pump motor (256) and plunger (120) and the inlet and outlet (122, 124) valves actuates the pump motor (256) and the inlet and outlet valves (122, 124) to drive liquid through the pump chamber (140) in a predetermined pumping cycle. The electronic control (542) includes a routine for dissipating ballooning in the pump chamber (140), the inlet (142) or the outlet (144) by delaying movement of the pump motor (256) with the pump chamber (140) in the contracted position and the outlet valve (124) in the open position a select amount of time.
REFERENCES:
patent: 2105200 (1938-01-01), Phelps
patent: 2412397 (1946-12-01), Harper
patent: 3701618 (1972-10-01), Wall
patent: 3778195 (1973-12-01), Bamberg
patent: 3966358 (1976-06-01), Heimes et al.
patent: 4199307 (1980-04-01), Jassawalla
patent: 4255088 (1981-03-01), Newton et al.
patent: 4273121 (1981-06-01), Jassawalla
patent: 4373527 (1983-02-01), Fischell
patent: 4396385 (1983-08-01), Kelly et al.
patent: 4411652 (1983-10-01), Kramer et al.
patent: 4416595 (1983-11-01), Cromie
patent: 4425116 (1984-01-01), Bilstad et al.
patent: 4428745 (1984-01-01), Williams
patent: 4456009 (1984-06-01), Vcelka et al.
patent: 4460358 (1984-07-01), Somerville et al.
patent: 4474309 (1984-10-01), Solomon
patent: 4479797 (1984-10-01), Kobayashi et al.
patent: 4498843 (1985-02-01), Schneider et al.
patent: 4515536 (1985-05-01), van Os
patent: 4551133 (1985-11-01), Zegers de Beyl et al.
patent: 4586691 (1986-05-01), Kozlow
patent: 4650469 (1987-03-01), Berg et al.
patent: 4657490 (1987-04-01), Abbott
patent: 4689043 (1987-08-01), Bisha
patent: 4690673 (1987-09-01), Bloomquist
patent: 4696671 (1987-09-01), Epstein et al.
patent: 4731051 (1988-03-01), Fischell
patent: 4735558 (1988-04-01), Kienholz et al.
patent: 4764166 (1988-08-01), Spani
patent: 4784645 (1988-11-01), Fischell
patent: 4810243 (1989-03-01), Howsen
patent: 4818186 (1989-04-01), Pastrone et al.
patent: 4821558 (1989-04-01), Pastrone et al.
patent: 4842584 (1989-06-01), Pastrone
patent: 4893991 (1990-01-01), Heminway et al.
patent: 4927411 (1990-05-01), Pastrone et al.
patent: 4944191 (1990-07-01), Pastrone et al.
patent: 4954055 (1990-09-01), Raible et al.
patent: 5000663 (1991-03-01), Gorton
patent: 5000664 (1991-03-01), Lawless
patent: 5006050 (1991-04-01), Cooke et al.
patent: 5006110 (1991-04-01), Garrison et al.
patent: 5017059 (1991-05-01), Davis
patent: 5039279 (1991-08-01), Natwick et al.
patent: 5074756 (1991-12-01), Davis
patent: 5088522 (1992-02-01), Rath et al.
patent: 5088981 (1992-02-01), Howsen et al.
patent: 5100380 (1992-03-01), Epstein et al.
patent: 5116203 (1992-05-01), Natwick et al.
patent: 5131816 (1992-07-01), Brown et al.
patent: 5153827 (1992-10-01), Coutre et al.
patent: 5158437 (1992-10-01), Natwick
patent: 5166203 (1992-11-01), Natwick et al.
patent: 5180287 (1993-01-01), Natwick et al.
patent: 5191795 (1993-03-01), Fellingham et al.
patent: 5211548 (1993-05-01), Okada
patent: 5242279 (1993-09-01), Knuth
patent: 5252044 (1993-10-01), Raines et al.
patent: 5273406 (1993-12-01), Feygin
patent: 5290239 (1994-03-01), Classey et al.
patent: 5336051 (1994-08-01), Tamari
patent: 5482446 (1996-01-01), Williamson et al.
patent: 5551850 (1996-09-01), Williamson et al.
Anderson Robert L.
Blankenship Larry
Colesworthy, III Daniel C.
Heim Warren P.
Baxter International Inc.
Bratschun T. D.
Korytnyk Peter G.
Kowalik F. C.
Schaafsma P. E.
LandOfFree
Pump chamber back pressure dissipation apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pump chamber back pressure dissipation apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump chamber back pressure dissipation apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1100367