US4416662A — Roller infusion apparatus

Claim 1

Independent Claim 183 words

An infusion apparatus comprising housing means, a motor mounted in said housing means, a channel-shaped chassis rigidly connected to said housing means and being laterally offset therefrom, a syringe having a barrel with a radial peripheral flange, a smooth-profiled plunger slidably engaged in said barrel, a drive roller means journalled in said channel-shaped chassis with the axis of said roller means being transverse to the length of said channel, said drive roller means having teeth projecting from the circumference thereof and adapted to penetratingly engage said smooth-profiled plunger to drive said plunger in said barrel, means drivingly coupling said motor to said drive roller means, and an annular discharge conduit projecting from the end of the barrel opposite said plunger, said chassis having parallel side walls formed with opposing grooves slidably receiving said peripheral flange and positioning said plunger to transversely engage on said drive roller means, abutment means mounted on said side walls and being clampingly engageable with said plunger to hold the plunger in driving engagement with said toothed roller means, and infusion cannula means communicatively connected to said discharge conduit.

Claim 2

Dependent Claim 183 words

An infusion apparatus comprising housing means, a motor mounted in said housing means, a channel-shaped chassis rigidly connected to said housing means and being laterally offset therefrom, a syringe having a barrel with a radial peripheral flange, a smooth-profiled plunger slidably engaged in said barrel, a drive roller means journalled in said channel-shaped chassis with the axis of said roller means being transverse to the length of said channel, said drive roller means having teeth projecting from the circumference thereof and adapted to penetratingly engage said smooth-profiled plunger to drive said plunger in said barrel, means drivingly coupling said motor to said drive roller means, and an annular discharge conduit projecting from the end of the barrel opposite said plunger, said chassis having parallel side walls formed with opposing grooves slidably receiving said peripheral flange and positioning said plunger to transversely engage on said drive roller means, abutment means mounted on said side walls and being clampingly engageable with said plunger to hold the plunger in driving engagement with said toothed roller means, and infusion cannula means communicatively connected to said discharge conduit.

Claim 3

Dependent Claim 25 words

The infusion apparatus of claim 1, and wherein said coupling means comprises meshing bevel gears connected respectively to the motor and the drive roller means.

Claim 4

Dependent Claim 35 words

The infusion apparatus of claim 1, and wherein said motor has an output shaft, and wherein said channel-shaped chassis has a trough cavity which extends parallel to said output shaft but is laterally offset therefrom.

Claim 5

Dependent Claim 70 words

The infusion apparatus of claim 1, and wherein said annular discharge conduit has a discharge needle mounted axially therein, and wherein said cannula means has a connection member sealingly engageable in said discharge conduit and provided with a transverse self-closing septum through which the needle is penetrable when the connection member is sealingly received in the conduit, and which closes when the connection member is detached from said discharge conduit.

Claim 6

Dependent Claim 42 words

The infusion apparatus of claim 1, and wherein an infusion needle is provided, said infusion needle having a main leading portion of substantially the same outside diameter as the cannula means and having a reduced rear portion fitting into the cannula means.

Claim 7

Dependent Claim 77 words

The infusion apparatus of claim 1, and wherein the cannula means is formed at its leading end with a solid reduced suture portion connectable to a needle which can be passed through the skin tissue of a patient to draw the cannula means with it, the cannula means being formed with a slit adjacent the suture portion to allow air expulsion and then drug expulsion after the cannula means has been adjusted to locate the slit subcutaneously.

Claim 8

Dependent Claim 189 words

An infusion apparatus comprising housing means, a motor mounted in said housing means, a channel-shaped chassis rigidly connected to said housing means and being laterally offset therefrom, a tubed drive roller means journalled in said channel-shaped chassis with the axis of said roller means being transverse to the length of said channel, means drivingly coupling said motor to said drive motor, a syringe having a barrel with a radial peripheral flange, a plunger slidably engaged in said barrel, and an annular discharge conduit projecting from the end of the barrel opposite said plunger, said chassis having parallel side walls formed with opposing grooves slidably receiving said peripheral flange and positioning said plunger to transversely engage on said drive roller means, abutment means mounted on said side walls and being clampingly engageable with said plunger to hold the plunger in driving engagement with said toothed roller means, said abutment means comprising a clamping rod pivoted to one side wall and being lockingly engageable with the other side wall of the pressure pad means on the rod engageable with the plunger, and infusion cannula means communicatively connected to said discharge conduit.

Claim 9

Dependent Claim 189 words

An infusion apparatus comprising housing means, a motor mounted in said housing means, a channel-shaped chassis rigidly connected to said housing means and being laterally offset therefrom, a tubed drive roller means journalled in said channel-shaped chassis with the axis of said roller means being transverse to the length of said channel, means drivingly coupling said motor to said drive motor, a syringe having a barrel with a radial peripheral flange, a plunger slidably engaged in said barrel, and an annular discharge conduit projecting from the end of the barrel opposite said plunger, said chassis having parallel side walls formed with opposing grooves slidably receiving said peripheral flange and positioning said plunger to transversely engage on said drive roller means, abutment means mounted on said side walls and being clampingly engageable with said plunger to hold the plunger in driving engagement with said toothed roller means, said abutment means comprising a clamping rod pivoted to one side wall and being lockingly engageable with the other side wall of the pressure pad means on the rod engageable with the plunger, and infusion cannula means communicatively connected to said discharge conduit.

Claim 10

Dependent Claim 35 words

The infusion apparatus of claim 7, and wherein said clamping rod is pivoted to the upper portion of one side wall to swing in the vertical plane of the axis of the drive roller means.

Claim 11

Dependent Claim 38 words

The infusion apparatus of claim 8, and wherein the upper portion of said one side wall is formed with a recess provided with a longitudinally extending hinge pin, said clamping rod being rotatably mounted on said hinge pin.

Claim 12

Dependent Claim 36 words

The infusion apparatus of claim 9, and wherein said other side wall is formed with a second recess to receive the clamping rod and has a locking projection beneath which the clamping rod is lockingly receivable.

Claim 13

Dependent Claim 30 words

The infusion apparatus of claim 10, and wherein said clamping rod is provided with a pressure pad member located part way therealong and shaped to conformably engage on the plunger.

Claim 14

Dependent Claim 80 words

A powered medicinal infuser apparatus for infusing medicinals over long periods in a continuous manner comprising a housing carrying a toothed roller means, means for holding a disposable plastic syringe having a smoothly profiled plunger in predetermined disposition to said housing with said plunger extending transversely to the axis of rotation of and in driving penetrating engagement with said toothed roller, a motor for driving said toothed roller means, and a transmission operably coupling said motor and toothed roller means.

Claim 15

Dependent Claim 80 words

A powered medicinal infuser apparatus for infusing medicinals over long periods in a continuous manner comprising a housing carrying a toothed roller means, means for holding a disposable plastic syringe having a smoothly profiled plunger in predetermined disposition to said housing with said plunger extending transversely to the axis of rotation of and in driving penetrating engagement with said toothed roller, a motor for driving said toothed roller means, and a transmission operably coupling said motor and toothed roller means.

Claim 16

Dependent Claim 35 words

Apparatus according to claim 12 wherein the teeth of said roller means are, circumferentially of said roller means, of triangular shape with an apex angle of about 60° and a negative rake of about 12°.

Claim 17

Dependent Claim 24 words

Apparatus according to claim 12 wherein the teeth of said roller means are successively separated circumferentially of said roller means by smooth bottom lands.

Claim 18

Dependent Claim 15 words

Apparatus according to claim 12 wherein the teeth of said roller means extend axially thereacross.

Claim 19

Dependent Claim 20 words

Apparatus according to claim 12 wherein said syringe holding means comprises a pressure pad located in opposition about said plunger.

Claim 20

Dependent Claim 49 words

Apparatus according to claim 16 wherein said pad is movable between two positions, one of which separates the pad from said roller to release said plunger, and the other of which closes the pad towards said roller means to effect said driving engagement of the latter with said plunger.

Claim 21

Dependent Claim 43 words

Apparatus according to claim 12 wherein said motor has an output shaft, said housing has a longitudinal axis and holds said syringe with its longitudinal axis parallel with said motor output shaft, and said transmission includes a pair of mutually engaged bevel gears.

Claim 22

Dependent Claim 20 words

Apparatus according to claim 12 in combination with a syringe having a barrel and plunger of substantially circular cylindrical form.

Claim 23

Dependent Claim 49 words

Apparatus according to claim 19 wherein said barrel has an annular flange therearound, and said syringe holding means include a trough formation in said housing to receive at least part of said barrel, said trough having a transverse slot in its side walls for engagement of said flange therein.

Claim 24

Dependent Claim 124 words

Apparatus according to claim 12 in combination with a syringe and cannula, said syringe having a fluid outlet terminal in the form of a first annular wall projecting from the syringe barrel with a first closure wall extending thereacross, and said cannula having a fluid input terminal in the form of a second annular wall projecting from one end of the cannula with a second closure wall extending thereacross, one of said closure walls being in the form of a septum of selfsealing elastomeric material, the other one of said closure walls having a hollow needle projecting therethrough, and said annular walls having respectively complimentary conically tapered formations which are co-operable to form a sealed connection with entry of said needle through said septum.

Claim 25

Dependent Claim 54 words

Apparatus according to claim 12 in combination with a cannula and cannula needle, said needle having a body with a trailing end which body, towards said trailing end, steps down through a shoulder from one diameter to another, said diameters being respectively substantially the same as the external and internal diameters of said cannula.

Claim 26

Dependent Claim 40 words

Apparatus according to claim 12 in combination with a cannula having one end portion of solid form tapered towards its free end, and the associated hollowed portion of said cannula having a short slit adjacent to said one end portion.

Claim 27

Dependent Claim 55 words

Apparatus according to claim 12 wherein the teeth of said roller means extend axially across said roller means and are separated from one another circumferentially of said roller means by smooth bottom lands, each of said teeth being of triangular cross-section with an apex angle of about 60° and a negative rake of about 12°.

Claim 28

Dependent Claim 85 words

Medicant administration apparatus for feeding medicants over long periods in a continuous manner, comprising: a toothed roller; an electric motor; a transmission operably coupling said gear and motor; a syringe of plastic material including a barrel and a plunger, said plunger having a smooth longitudinal profile; and means releasably holding said syringe in a predetermined disposition relative to said assembly with said plunger extending transversely to the axis of rotation of said roller means and said roller means in penetrated driving engagement with said profile.

Claim 29

Dependent Claim 85 words

Medicant administration apparatus for feeding medicants over long periods in a continuous manner, comprising: a toothed roller; an electric motor; a transmission operably coupling said gear and motor; a syringe of plastic material including a barrel and a plunger, said plunger having a smooth longitudinal profile; and means releasably holding said syringe in a predetermined disposition relative to said assembly with said plunger extending transversely to the axis of rotation of said roller means and said roller means in penetrated driving engagement with said profile.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-11-21	1987-05-23	1987-11-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-11-21	1991-05-23	1991-11-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-11-21	1995-05-23	1995-11-22	$7700.00	Window Closed / Lapsed

Roller infusion apparatus

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