Syringe pump valving and motor direction control system

Details Syringe pump valving and motor direction control system Syringe pump valving and motor direction control system

1975-02-28

1976-11-30

Truluck, Dalton L.

Surgery

Respiratory method or device

Ozone or ion generation

128234, 128274, 128DIG12, 222450, 251 9, 417 19, 417317, 417510, A61M 520

Patent

active

039942945

ABSTRACT:
Apparatus for fluid flow control in a parenteral administration system, utilizing a syringe pump operated by a motor to repetitively fill and empty a syringe cartridge over a plurality of operational cycles of successive fill stroke and pump stroke periods. The apparatus repetitively and sequentially opens and closes a pair of intake and output I.V. tubes communicating with a syringe, the tubes alternating opened and closed states, one tube always being open while the other is closed, by means of a pair of L-shaped pivotal tube pinchers, one pincher controlling each I.V. tube, each pincher being normally spring biased to the tube clamping shut-off state. The tube pinchers are alternately pivoted to a non-clamping, tube-open position by a spring biased, intermittent motion, reciprocating slide bar under the control of a reversible, rotating cam, the cam being driven by the same motor as that used to drive the piston of the syringe through its fill and pump strokes. A photoelectric sensor is responsive to the physical position of one of the tube pinchers and generates an electrical signal to control the direction of motor rotation and, hence, determines whether the syringe pump performs a fill stroke or a pump stroke.

REFERENCES:
patent: 2625932 (1953-01-01), Salisbury
patent: 2625933 (1953-01-01), Salisbury
patent: 3359910 (1967-12-01), Latham
patent: 3543752 (1970-12-01), Hesse et al.
patent: 3550619 (1970-12-01), Halasz et al.
patent: 3654959 (1972-04-01), Kassel
patent: 3731679 (1973-05-01), Wilhelmson et al.
patent: 3963151 (1976-06-01), North

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