US5199948A — Needleless valve

Claim 1

Independent Claim 88 words

An injection site comprising: a housing having an inlet; a septum having: a cylindrical body having first and second opposite circular ends and a cylindrical side face extending between them; a concave surface in the first end of the body; and a slit extending axially from the concave surface at least substantially into the septum; and means for securing the septum to the housing at the inlet, with a peripheral portion of the septum body compressed so as to cause the concave surface to bulge, thereby becoming flat.

Claim 2

Dependent Claim 88 words

An injection site comprising: a housing having an inlet; a septum having: a cylindrical body having first and second opposite circular ends and a cylindrical side face extending between them; a concave surface in the first end of the body; and a slit extending axially from the concave surface at least substantially into the septum; and means for securing the septum to the housing at the inlet, with a peripheral portion of the septum body compressed so as to cause the concave surface to bulge, thereby becoming flat.

Claim 3

Dependent Claim 23 words

The injection site of claim 1, wherein the securing means comprises a bond between the housing and the peripheral portion of the septum.

Claim 4

Dependent Claim 33 words

The injection site of claim 1, wherein the securing means comprises a retaining cap secured to the housing, with the peripheral portion of the septum being compressed between the inlet and the cap.

Claim 5

Dependent Claim 29 words

The injection site of claim 3, wherein the cap includes an annular head with a central opening, and wherein the septum's concave surface is centered in the central opening.

Claim 6

Dependent Claim 34 words

The injection site of claim 4, wherein the cap further includes a cylindrical skirt extending axially from the cap's head, and wherein the septum is encircled by the skirt and in direct contact therewith.

Claim 7

Dependent Claim 28 words

The injection site of claim 4, wherein the external diameter of the septum exceeds the internal diameter of the skirt prior to securing the cap on the inlet.

Claim 8

Dependent Claim 45 words

The injection site of claim 4, wherein the septum body's first end face extends into the cap head's opening so that the septum body's concave surface rises substantially to the level of the cap head's exterior surface when the cap is secured to the inlet.

Claim 9

Dependent Claim 35 words

The injection site of claim 3, wherein the housing inlet includes an axially-extending cylindrical recess defined by a wall and ribs extending radially inwardly from the wall to center the septum's body within the recess.

Claim 10

Dependent Claim 56 words

The injection site of claim 8, wherein the cap further includes a cylindrical skirt extending from the cap's head, the septum is encircled by the skirt and in direct contact therewith, and the external diameter of the septum's cylindrical side face exceeds the internal diameter of the skirt prior to securing the cap to the inlet.

Claim 11

Dependent Claim 20 words

The injection site of claim 3 additionally including a second concave surface in the second end of the septum's body.

Claim 12

Dependent Claim 40 words

The injection site of claim 10, wherein the housing's inlet includes a floor with a centrally-disposed opening therein, and wherein the septum body's second end is pressed against the housing inlet's floor when the cap is secured to the inlet.

Claim 13

Dependent Claim 47 words

The injection site of claim 3, wherein the housing inlet includes a floor with a centrally-disposed opening therein, and wherein the septum body's second end is spaced from the housing inlet's floor and expands toward the floor when a piercing member is inserted through the septum's slit.

Claim 14

Dependent Claim 39 words

The injection site of claim 3, wherein the septum has a peripheral flange portion contiguous with the septum body and compressed between the inlet and the cap so as to cause the concave surface to bulge, thereby becoming flat.

Claim 15

Dependent Claim 33 words

The injection site of claim 3, wherein the inlet and the cap form opposed annular surfaces tapering away from the septum between them to create axial expansion spaces for the septum's peripheral portion.

Claim 16

Dependent Claim 28 words

The injection site of claim 1 in combination with a drug transfer spike having a piercing member extending through the septum's slit and terminating in a ball-shaped tip.

Claim 17

Dependent Claim 29 words

The injection site of claim 1, wherein the inlet forms an annular surface tapering away from the septum to create an axial expansion space for the septum's peripheral portion.

Claim 18

Dependent Claim 15 words

The injection site of claim 1, wherein the septum body extends into the housing inlet.

Claim 19

Dependent Claim 24 words

The injection site of claim 1, wherein the housing inlet terminates in a wedge-shaped rim, and the septum body is seated on that rim.

Claim 20

Dependent Claim 27 words

The injection site of claim 1 in combination with: a syringe having a piercing member extending through the septum slit and terminating in a ball shaped tip.

Claim 21

Dependent Claim 131 words

An injection site comprising: a housing having an inlet formed of a cylindrical wall including a rim; a septum having: a cylindrical body having first and second ends; a peripheral flange portion contiguous with the body; a concave surface in the first end of the body; and a slit extending axially from the concave surface at least substantially into the septum; a retaining cap having a cylindrical skirt extending from an annular, centrally-apertured head, the skirt having an internal diameter no greater than the external diameter of the septum peripheral flange portion; and means for securing the cap to the housing inlet wall, with the septum peripheral flange portion compressed between the cap head and the inlet rim so as to cause the septum concave surface to bulge, thereby becoming flat.

Claim 22

Dependent Claim 131 words

An injection site comprising: a housing having an inlet formed of a cylindrical wall including a rim; a septum having: a cylindrical body having first and second ends; a peripheral flange portion contiguous with the body; a concave surface in the first end of the body; and a slit extending axially from the concave surface at least substantially into the septum; a retaining cap having a cylindrical skirt extending from an annular, centrally-apertured head, the skirt having an internal diameter no greater than the external diameter of the septum peripheral flange portion; and means for securing the cap to the housing inlet wall, with the septum peripheral flange portion compressed between the cap head and the inlet rim so as to cause the septum concave surface to bulge, thereby becoming flat.

Claim 23

Dependent Claim 56 words

The injection site of claim 20, wherein the septum body first end extends beyond the septum peripheral flange portion and into the cap head central aperture so that the septum body concave surface rises within the central aperture substantially to the level of the cap head exterior surface when the cap is secured to the inlet.

Claim 24

Dependent Claim 52 words

The injection site of claim 20, wherein the housing inlet includes a floor with a centrally-disposed opening therein, the septum body additionally includes a second concave surface in its one end, and the septum body's one end is pressed against the housing inlet's floor when the cap is secured to the inlet.

Claim 25

Dependent Claim 68 words

The injection site of claim 20, wherein the housing inlet includes an axially-extending cylindrical recess defined by a wall and ribs extending radially inwardly from the wall to center the septum's body within the recess, the septum body being spaced from the wall of the inlet recess and expanding into the interstices between the wall and the ribs when a piercing member is inserted through the septum's slit.

Claim 26

Dependent Claim 91 words

A drug transfer spike comprising: a receptacle with an axial opening for receiving the tip of a syringe; and a hollow tubular piercing member in communication with the opening, the tubular piercing member terminating in a terminal portion which comprises a slanted tapered scarf which extends across opposite halves of the wall of the tubular piercing member and a tip which is ball-shaped and on the distal portion of the scarf, the radius of curvature of the tip being about one-half the dimension of the thickness of the piercing member wall.

Claim 27

Dependent Claim 91 words

A drug transfer spike comprising: a receptacle with an axial opening for receiving the tip of a syringe; and a hollow tubular piercing member in communication with the opening, the tubular piercing member terminating in a terminal portion which comprises a slanted tapered scarf which extends across opposite halves of the wall of the tubular piercing member and a tip which is ball-shaped and on the distal portion of the scarf, the radius of curvature of the tip being about one-half the dimension of the thickness of the piercing member wall.

Claim 28

Dependent Claim 121 words

An injection site comprising: a housing having an inlet; a septum having: a cylindrical body having first and second opposite circular end surfaces and a cylindrical side face extending between them; a concave surface in the first end of the body; and a slit extending axially from the first end concave surface through the septum; and a retaining cap for securing the septum to the housing at the inlet, with a peripheral portion of the septum body compressed between the inlet and the cap so as to cause the first concave end surface to bulge, thereby becoming flat, wherein the inlet forms an annular surface tapering away from the septum to create an axial expansion space for the septum peripheral portion.

Claim 29

Dependent Claim 121 words

An injection site comprising: a housing having an inlet; a septum having: a cylindrical body having first and second opposite circular end surfaces and a cylindrical side face extending between them; a concave surface in the first end of the body; and a slit extending axially from the first end concave surface through the septum; and a retaining cap for securing the septum to the housing at the inlet, with a peripheral portion of the septum body compressed between the inlet and the cap so as to cause the first concave end surface to bulge, thereby becoming flat, wherein the inlet forms an annular surface tapering away from the septum to create an axial expansion space for the septum peripheral portion.

Claim 30

Dependent Claim 15 words

The injection site of claim 25, wherein the septum body extends into the housing inlet.

Claim 31

Dependent Claim 24 words

The injection site of claim 25, wherein the housing inlet terminates in a wedge-shaped rim, and the septum body is seated on that rim.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-04-05	1996-10-05	1997-04-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-04-05	2000-10-05	2001-04-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-04-05	2004-10-05	2005-04-06	$7700.00	Window Closed / Lapsed

Needleless valve

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