Pumps – Ambulant – body supported – or with carrying handle
Patent
1975-02-10
1976-06-01
Croyle, Carlton R.
Pumps
Ambulant, body supported, or with carrying handle
128 66, 417313, 417477, F04B 2100, F04B 4312
Patent
active
039604667
ABSTRACT:
The invention is concerned with a peristaltic action pump useful for douche and enema purposes and capable of delivering a uniform flow of liquid. The pump comprises a flexible tube affixed in a hemicircular shape and having a fluid input port at one end thereof and a fluid exit port at the other end thereof. A rotatable member is provided adjacent to and generally parallel to the plane of the hemicircle, the rotatable member being rotatable about an axis in line with the axis of the hemicircle. Means are also provided, coupled with the rotatable member for rotatingly driving it. A pair of levers are provided pivotally mounted intermediate thereof to the rotatable member, each at an equal and non-zero distance from the rotational axis of the member, a line from the mounting of one of the pair of levers to the mounting of the other of the pair of levers passing through the rotational axis of the member. A pair of rollers are provided, one of the rollers being pivotally attached to one of the ends of each of the levers, the rollers extending sufficiently from the one ends of the levers to press upon and to temporarily deform the flexible tube, a line from the attachment of one of the pair of rollers to the attachment of the other of the pair of rollers passing generally through the rotational axis of the member. Also spring means are provided between the other ends of the pair of levers biasing said other ends of said pair of levers towards one another, a line from said other end of one of said levers to said other end of the other of said levers passing generally through said rotational axis. The pump may also include cam means for selectively lifting one of the pair of rollers away from the flexible tube whereby pulsating flow of fluid is obtained from the pump.
REFERENCES:
patent: 2314281 (1943-03-01), Knott
patent: 2694984 (1954-11-01), Daniels
patent: 3116697 (1964-01-01), Bilichniansky
patent: 3138104 (1964-06-01), Cantor
patent: 3762411 (1973-10-01), Lloyd et al.
patent: 3783867 (1974-01-01), Summersby et al.
Croyle Carlton R.
Sessions O. T.
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