Pump apparatus

Pumps – Motor driven – Fluid motor

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

417297, 417384, 417395, 92 97, F04B 4306

Patent

active

042656001

ABSTRACT:
A pump for transferring precise amounts of fluid from a container to a patient. A pump apparatus has a defined volume pump chamber divided by a diaphragm into a pumping fluid portion and a pumped fluid portion. The pumped fluid portion receives and exhausts pumped fluid in response to a decrease or increase in pressure in the pumping fluid portion of the pump chamber. The diaphragm and the defined volume pumping chamber provide accurate per cycle pumping volumes. The pumping fluid pressure is varied by periodically electrically heating a ribbon filament in a pumping fluid chamber thereby increasing the temperature and therefore the pressure and/or volume of the pumping fluid. The pumped fluid enters the pumping chamber through a one-way valve as the pumped fluid portion volume expands and is exhausted through a second one-way valve as the volume of the pumped fluid portion contracts. Control circuitry is provided to allow variations in the pulse repetition rate and pulsewidth. A feedback control loop may also be provided by sensing, for example, the fluid flow rate, pressure, temperature or other dependent variable and generating an error signal therefrom.

REFERENCES:
patent: 2289617 (1942-07-01), Wood
patent: 2576282 (1951-11-01), Chambers
patent: 2957422 (1960-10-01), Loeber
patent: 3036525 (1962-05-01), Schulze et al.
patent: 3045874 (1962-07-01), Kogan et al.
patent: 3064631 (1962-11-01), Schwander
patent: 3101058 (1963-08-01), Carr, Jr. et al.
patent: 3232524 (1966-02-01), Rice et al.
patent: 3387566 (1968-06-01), Temple
patent: 3762838 (1973-10-01), Sato
patent: 3947156 (1976-03-01), Becker

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Pump apparatus 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 apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-294470

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.