US3776229A — Medical liquid administration set for rate or vol…

Claim 1

Independent Claim 329 words

A system comprising an administration set for optionally dispensing medical liquid by a continuous rate in drops or as a measured volume without disconnecting the administration set from a liquid supply source, comprising in combination: a liquid supply container having a lower outlet through which liquid descends; a supply of medical liquid in said container; a calibrated-volume housing including a transparent tubular wall having top and bottom end closures; said top end closure having an inlet opening and said bottom end closure having an outlet opening; a filling conduit connected in series between the outlet opening of said liquid container and the inlet opening of said top end closure, said filling conduit being substantially smaller in cross section than either the liquid supply container or the calibrated volume housing, said top end closure including a drip tube connected to said fluid conduit and depending into said housing and including a terminal discharge end substantially immediately below said top end closure and being of a size for forming countable drops of the medical liquid as it drops onto a level of liquid in said housing; a first two-position valve having ''''open'''' ''''closed'''' settings and being interposed in said filling conduit for controlling the flow of liquid into said housing from said liquid supply container; said top end closure having an air vent means for connecting the housing to atmospheric pressure; a second two-position valve having ''''open''''-''''closed'''' settings and being connected to said air vent for sealing off the interior of the housing from atmospheric pressure or opening the interior of the housing to atmospheric pressure thereto; and a dispensing conduit substantially smalleR in cross section than said housing and connected to the bottom end closure outlet opening, said set providing means for administering liquid as a continuous rate directly from the liquid supply container or as a measured volume from the housing when one of said valves is in an ''''open'''' setting and the other is in an ''''closed'''' setting.

Claim 2

Independent Claim 329 words

A system comprising an administration set for optionally dispensing medical liquid by a continuous rate in drops or as a measured volume without disconnecting the administration set from a liquid supply source, comprising in combination: a liquid supply container having a lower outlet through which liquid descends; a supply of medical liquid in said container; a calibrated-volume housing including a transparent tubular wall having top and bottom end closures; said top end closure having an inlet opening and said bottom end closure having an outlet opening; a filling conduit connected in series between the outlet opening of said liquid container and the inlet opening of said top end closure, said filling conduit being substantially smaller in cross section than either the liquid supply container or the calibrated volume housing, said top end closure including a drip tube connected to said fluid conduit and depending into said housing and including a terminal discharge end substantially immediately below said top end closure and being of a size for forming countable drops of the medical liquid as it drops onto a level of liquid in said housing; a first two-position valve having ''''open'''' ''''closed'''' settings and being interposed in said filling conduit for controlling the flow of liquid into said housing from said liquid supply container; said top end closure having an air vent means for connecting the housing to atmospheric pressure; a second two-position valve having ''''open''''-''''closed'''' settings and being connected to said air vent for sealing off the interior of the housing from atmospheric pressure or opening the interior of the housing to atmospheric pressure thereto; and a dispensing conduit substantially smalleR in cross section than said housing and connected to the bottom end closure outlet opening, said set providing means for administering liquid as a continuous rate directly from the liquid supply container or as a measured volume from the housing when one of said valves is in an ''''open'''' setting and the other is in an ''''closed'''' setting.

Claim 3

Dependent Claim 36 words

The combination as set forth in claim 1 wherein the chamber has an upstanding rigid tube around its vent opening with a passage through the tube into the chamber, and a filter member spans this passage.

Claim 4

Dependent Claim 36 words

The combination as set forth in claim 2 wherein the manually openable closure forms an airtight fit with the upstanding tube and is rotatable relative thereto, and said upstanding tube and closure having alignable groove systems.

Claim 5

Dependent Claim 34 words

The combination as set forth in claim 3 wherein the cap has a laterally extending handle to provide a visual indication of its angular position showing whether the vent passage is open or closed.

Claim 6

Dependent Claim 43 words

The combination as set forth in claim 3 wherein the upstanding rigid tube has a groove system on its outer surface and said closure system is a cap fitting over said upstanding tube, said cap having a groove system on its inner surface.

Claim 7

Dependent Claim 61 words

The combination as set forth in claim 5 wherein the cap has a vertical groove along a lower portion of its inner surface; the upstanding rigid tube has a vertical groove along its upper portion; and said two vertical grooves overlapping when they are rotationally aligned with each other, so that air can enter and exit through the aligned interconnecting grooves.

Claim 8

Dependent Claim 32 words

The combination as set forth in claim 5 wherein the system has rotational limit stop means to confine the closure rotation of the cap on the upstanding tube to less than 360*.

Claim 9

Dependent Claim 56 words

The combination as set forth in claim 7 wherein the rotational stop means is a protruding lug at a base of the upstanding tube, and the cap has a generally cylindrical wall with an internal radial slot that receives this lug, said cap having abutting shoulders at opposite ends of said slot for contacting the lug.

Claim 10

Dependent Claim 49 words

The combination as set forth in claim 8 wherein one shoulder abuts the stop means when the grooves are rotationally aligned for air passage, and the other shoulder abuts the lug when the grooves are sufficiently misaligned so as to fully shut off air passage through the vent opening.

Claim 11

Dependent Claim 37 words

The combination as set forth in claim 5 wherein the cap and upstanding tube have interfitting circumferential groove and rib structure to maintain the cap and upstanding tube together as the cap rotates on the upstanding tube.

Claim 12

Dependent Claim 57 words

The combination as set forth in claim 1 wherein the liquid outlet opening has an upwardly facing valve seat therearound, and the chamber has a floating valve member that seals against the valve seat when the vent passage is open and the liquid level within the chamber has dropped to approximately the level of the valve seat.

Claim 13

Dependent Claim 63 words

The combination as set forth in claim 1 wherein the set has a secondary drip housing connected to a lower portion of the volumetrically calibrated chamber about the liquid outlet opening, and there is a drip forming tube surrounding the liquid outlet passage and extending into the secondary drip chamber, said secondary drip chamber having a drain port at a lower portion thereof.

Claim 14

Dependent Claim 48 words

The combination as set forth in claim 12 wherein the set has conduit means connected to the inlet of the volumetrically calibrated chamber and also has conduit means connected to the drain port of the secondary drip chamber, both of said conduits having liquid flow control valves thereon.

Claim 15

Dependent Claim 314 words

A parenteral liquid administration set for selectively dispensing medical liquid by either ''''continuous drip'''' or ''''measured volume,'''' said set including: an enlarged chamber that includes a cylindrical transparent wall with volumetrically calibrated indicia thereon; a top cap fitted to an upper end of the cylindrical wall, said top cap including a liquid inlet openinG with an external tubular connector and an internal drip tube about the liquid inlet opening; a filling conduit substantially smaller in diameter than the cylindrical wall, which filling conduit is connected to the liquid opening of the top end; a first valve connected with the filling conduit for opening or closing a passage through the filling conduit; partially along its vertical length, said groove stopping short of the base of the upstanding tube; a circumferential rib on the upstanding tube; an air pervious, liquid impervious filter closing off the passage through said upstanding tube; a cap fitting over and rotationally mounted on the rigid upstanding tube; an internal vertical groove within the cap which vertical groove interconnects with the upstanding tube''s external groove at one particular rotational position of the cap, whereby air is admitted into said chamber, said cap rotatable about the upstanding tube to close said vent''s air passage; said cap having a circumferential internal groove which receives the rib of the upstanding tube; lateral rotational stop means on the cap and upstanding tube; a bottom cap connected to the transparent cylindrical wall and having an outlet port therein; a float valve means within the calibrated chamber for closing off its outlet as liquid drops to approximately the level of the outlet; a secondary drip chamber connected to the liquid outlet of the calibrated chamber; said parenteral liquid administration set adapted to deliver parenteral liquid at a ''''continuous drip'''' or a ''''measured volume'''' when only one, but not both, of the two valves is in an open position.

Claim 16

Dependent Claim 314 words

A parenteral liquid administration set for selectively dispensing medical liquid by either ''''continuous drip'''' or ''''measured volume,'''' said set including: an enlarged chamber that includes a cylindrical transparent wall with volumetrically calibrated indicia thereon; a top cap fitted to an upper end of the cylindrical wall, said top cap including a liquid inlet openinG with an external tubular connector and an internal drip tube about the liquid inlet opening; a filling conduit substantially smaller in diameter than the cylindrical wall, which filling conduit is connected to the liquid opening of the top end; a first valve connected with the filling conduit for opening or closing a passage through the filling conduit; partially along its vertical length, said groove stopping short of the base of the upstanding tube; a circumferential rib on the upstanding tube; an air pervious, liquid impervious filter closing off the passage through said upstanding tube; a cap fitting over and rotationally mounted on the rigid upstanding tube; an internal vertical groove within the cap which vertical groove interconnects with the upstanding tube''s external groove at one particular rotational position of the cap, whereby air is admitted into said chamber, said cap rotatable about the upstanding tube to close said vent''s air passage; said cap having a circumferential internal groove which receives the rib of the upstanding tube; lateral rotational stop means on the cap and upstanding tube; a bottom cap connected to the transparent cylindrical wall and having an outlet port therein; a float valve means within the calibrated chamber for closing off its outlet as liquid drops to approximately the level of the outlet; a secondary drip chamber connected to the liquid outlet of the calibrated chamber; said parenteral liquid administration set adapted to deliver parenteral liquid at a ''''continuous drip'''' or a ''''measured volume'''' when only one, but not both, of the two valves is in an open position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-12-03	1977-06-04	1977-12-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-12-03	1981-06-04	1981-12-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-12-03	1985-06-04	1985-12-04	$7700.00	Window Closed / Lapsed

Medical liquid administration set for rate or volume delivery

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