Medical infusion pump with sensors

Details Medical infusion pump with sensors Medical infusion pump with sensors

1986-11-17

1988-07-19

Truluck, Dalton L.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604118, 604123, 604 34, 128DIG12, 417477, A61M 100

Patent

active

047582286

ABSTRACT:
A medical infusion pump includes a housing (10), a pump assembly (30), a bubble sensor assembly (120), a pressure sensor assembly (140) and a flow control assembly (180). The pump assembly includes a ring (26) with teeth (44) and a wheel (46) mounted for eccentric rotation within the ring. The pumping action is developed by the rotation of the wheel which continuously closes a portion of tubing (36) against one or two teeth as it goes through the pumping cycle. The bubble sensor includes a pair of sensor blocks (124) defining a generally V-shaped trough for cradling a portion of the tubing. The pressure sensor assembly detects pressure variations by movement of a diaphragm (168) coupled to a magnet (162) which is operatively coupled to a Hall effect circuit (160). The flow control assembly includes a thumb wheel (196) having a cam groove (197) interacting with a valve stem (199) for controlling the fluid flow through an orifice and associated valve seat (194).

REFERENCES:
patent: 3912168 (1975-10-01), Mullins et al.
patent: 4155362 (1979-05-01), Jess
patent: 4187057 (1980-02-01), Xanthopoulos
patent: 4210138 (1980-07-01), Jess et al.
patent: 4452599 (1984-06-01), Albisser et al.
patent: 4487601 (1984-12-01), Lindemann
patent: 4604090 (1986-08-01), Reinicke

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