Pumps – Motor driven – Electric or magnetic motor
Patent
1984-06-29
1985-10-01
Freeh, William L.
Pumps
Motor driven
Electric or magnetic motor
417477, 604153, F04B 3504, F04B 4312, A61M 500
Patent
active
045443360
ABSTRACT:
A peristaltic pump, more specially for enteral nutrition or feeding has an electric motor and a wheel, on which rollers are supported, with axis crossing the axis of the electric motor so that the main dimension of the wheel in its radial direction and the main dimension of the electric motor in its axial direction are parallel to each other or in line with each other so that a specially flat mechanical design of the pump is produced. The shaft of the electric motor has a pinion for meshing with teeth in a radial plane on the outer edge of the wheel and driving it, this producing a high step-down ratio of 1:500 or even more. The wheel with the rollers may have a generally large diameter so that it may be run at a low speed quietly. With such a diameter of the support wheel and when the pump has a flat rectangular housing, empty corners will be present in the housing on the two sides of the electric motor, into which batteries or the like may be placed. The motor may, because of the great step-down ratio, be run at a high speed so that a mass produced motor may be used for the pump. The peristaltic pump with such a flat rectangular housing may be comfortably kept under the user's clothing without making itself seen.
REFERENCES:
patent: 562903 (1896-06-01), Messmer
patent: 1635373 (1927-07-01), Lofholm
patent: 2434802 (1948-01-01), Jacobs
patent: 2662666 (1953-12-01), Lamport
patent: 2975719 (1961-03-01), Kaufman
patent: 4025241 (1977-05-01), Clemens
patent: 4135647 (1979-01-01), Mascia et al.
Faeser Ulrich
Mahn Dieter
Freeh William L.
Fresenius AG
Neils Paul F.
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