Portable infusion pump

Claim 2

A small volume, positive pressure, self-contained, portable infusion pump comprising at least one fluid containing collapsible receptacle, fluid passage means in communication with said receptacle and adapted for body hookup, force applying means associated with said receptacle for collapsing said receptacle to move fluid from said receptacle into and through said fluid passage means, a constant force coil spring drivingly connected to said force applying means, a torque and timing motor, and a slip clutch drivingly connecting said torque and timing motor to said force applying means to regulate the rate at which fluid is moved from said receptacle.

Claim 3

An infusion pump according to claim 1 wherein said fluid passage means comprises a check valve in open communication with said receptacle, an L-shaped arm member having a bore in open communication with said valve, a plug member adapted to permit flushing of said bore, and connector means for connecting said pump to body hookup tubes.

Claim 4

An infusion pump according to claim 2 wherein said receptacle comprises an open ended bag of resilient thermoplastic material, said open end being provided with an annular flange, a retaining ring surrounding said open end and said flange, and a closure member connected to said arm member and adapted to retain said flange within said ring.

Claim 5

An infusion pump according to claim 1 wherein two receptacles are contained within said housing and each receptacle is provided with fluid passage means and force applying means.

Claim 6

An infusion pump according to claim 4 wherein said force applying means comprises a piston adapted to contact its associated receptacle to collapse the same thereby forcing fluid contained therein into and through said fluid passage means, means connecting said pistons for simultaneous movement into contact with said receptacles, said means being operatively connected to said spring.

Claim 7

An infusion pump according to claim 5 wherein said piston connecting means comprises a plate portion having means at its extremities to be connected to said pistons, a hollow central embossment extending from said plate portion, a screw connected to said spring and adapted to be rotated thereby and a screw drive nut non-rotatably retained within said embossment and operatively connected to said screw whereby rotation of said screw moves said screw drive nut along the shaft of said screw thereby moving said piston connecting means and said pistons.

Claim 8

An infusion pump according to claim 1 wherein said torque motor comprises a battery operated electric watch mechanism operatively connected to said slip clutch.

Claim 9

An infusion pump according to claim 6 wherein means are provided to prevent rotation of said slip clutch.

Claim 10

An infusion pump according to claim 6 wherein rotatable means are provided for manual engagement with said screw for priming and rewinding said pump.

Claim 11

A small volume, positive pressure, self-contained, portable infusion pump comprising a housing having at least one fluid chamber, fluid passage means in communication with said chamber and adapted for delivery of the contents from said chamber, displacement means cooperating with said chamber for expelling the contents thereof through said fluid passage means, a driving motor operatively connected to said displacement means for supplying a driving force thereto, a constant speed timing motor connected to said displacement means for controlling the displacement thereof by opposing and aiding said driving motor to maintain a constant rate of displacement of said displacement means and thus provide a constant rate of discharge of the contents of said chamber.

Claim 12

A small volume, positive pressure, self-contained, portable infusion pump comprising a housing having at least one fluid chamber, fluid passage means in communication with said chamber and adapted for delivery of the contents from said chamber, displacement means cooperating with said chamber for expelling the contents thereof through said fluid passage means, a driving motor operatively connected to said displacement means for supplying a driving force thereto, a constant speed timing motor connected to said displacement means for controlling the displacement thereof by opposing and aiding said driving motor to maintain a constant rate of displacement of said displacement means and thus provide a constant rate of discharge of the contents of said chamber.

Claim 13

A small volume, positive pressure, self-contained, portable infusion pump comprising a housing, at least one fluid containing collapsible receptacle in said housing, fluid passage means in communication with said receptacle and adapted for delivery of the contents from said receptacle, displaceable piston means for collapsing said receptacle and expelling the contents thereof through said fluid passage means, a constant force spring operatively connected to said displaceable piston means for supplying a constant displacement producing force thereto, a timing means associated with said displaceable piston means and said constant force spring for controlling the release of the constant force to said displaceable piston means to maintain a constant rate of displacement of said displacement means and thus provide a constant rate of discharge of the contents of said receptacle, said timing means being connected to said displaceable piston means to permit control of the displacement thereof by opposing and aiding said constant force spring.

Claim 14

A small volume, positive pressure, self-contained, portable infusion pump comprising a housing, at least one fluid containing collapsible receptacle in said housing, fluid passage means in communication with said receptacle and adapted for delivery of the contents from said receptacle, displaceable piston means for collapsing said receptacle and expelling the contents thereof through said fluid passage means, a constant force spring operatively connected to said displaceable piston means for supplying a constant displacement producing force thereto, a timing means associated with said displaceable piston means and said constant force spring for controlling the release of the constant force to said displaceable piston means to maintain a constant rate of displacement of said displacement means and thus provide a constant rate of discharge of the contents of said receptacle, said timing means being connected to said displaceable piston means to permit control of the displacement thereof by opposing and aiding said constant force spring.