Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Patent
1977-09-27
1979-03-06
Croyle, Carlton R.
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
251 9, F04B 4308, F04B 4312, F04B 4506
Patent
active
041428455
ABSTRACT:
A source of power rotates a drive shaft upon which a pair of rollers are mounted. The rollers rotate in a recess and collapse an undialysed blood carrying tube against a wall thus causing a pumping action. When used with a single needle dialysis system, an occluding pin assembly intermittently clamps off the dialysed blood carrying tube as said source of power is interrupted in rotation thus permitting the device to be used with a conventional single needle assembly. By rotating a cylindrical member upon the upper end of the drive shaft, the rollers can be retracted from adjacent the wall against which the undialysed blood carrying tube rests thus facilitating the engagement and disengagement of the undialysed blood carrying tube with the device. Inasmuch as the wall thickness of such tubes often varies, between tubing produced by different manufacturers, means are provided to adjust the spatial relationship of the pump rollers with the wall against which the tube is pressed during the pumping action. A hinged lid is provided which, when closed, enables power to flow to the motor. This lid also includes means to retain the tubes in position during the operation of the device. The speed of the pump can be varied within limits and the timing sequence of the pump can also be varied within limits. Means are provided to disable the occluding pin assembly when the device is used with a double needle dialysis system.
REFERENCES:
patent: 1703361 (1929-02-01), Pohl
patent: 2314281 (1943-03-01), Knott
patent: 3192863 (1965-07-01), Vadot
patent: 3300562 (1967-01-01), Moore
patent: 3335753 (1967-08-01), Kiser
patent: 3447478 (1969-06-01), Clemens
patent: 3762836 (1973-10-01), DeVries
patent: 3836287 (1974-09-01), Grosholz et al.
patent: 3865134 (1975-02-01), Holcomb
patent: 3938909 (1976-02-01), Willock
patent: 3960466 (1976-06-01), Taylor
patent: 4070725 (1978-01-01), Austin et al.
Legal Jules O.
Lepp William A.
Ade Stanley G.
Croyle Carlton R.
Ross Thomas I.
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