AU4272389A - Safe-disposable hypodermic needle and syringe - Google Patents

Description

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FORM 1

AUSTRALIA Patents Act 1952

APPLICATION FOR A STANDARD PATENT

TIBOR KOVACS r0 0O r

4L 20 Banksia Broadway, Burleigh Heads. 4220. Queensland. Australia. I I *8 g

4I(

hereby apply for the grant of a Patent for an invention entitled:-

"SAFE-DISPOSABLE HYPODERMIC NEEDLE AND SYRINGE"

which is described in the accompanying provisional 4 1 specification.

00 0

0r0 2. My address for service is:- 4 D

PIZZEY COMPANY PATENT ATTORNEYS 4 GPO Box 1374, Brisbane. 4000. Queensland. 4 0 Australia.

r 08

DATED THIS Twelfth DAY OF November, 1990.

PIZZEY COMPANY PATENT ATTORNEYS

JOHN IZZEY p/n/ q pininnl Form 1 COMMONWEALTH OF AUSTRALIA Regulation 9 Patents Act 1952 APPLICATION FOR A STANDARD PATENT OR A STANDARD PATENT OF ADDITION Insert full name(s) of applicant(s) (71 1.

Insert address(es) of k o of applicant(s) Insert title (54) hereby apply for the grant of a [itandard patent for an invention entitled..Co..--..... of invention o aD patent of addition P.Q. c. e (Tick appropriate box) which is described in the accompanying E provisional specification. 0 complete Insert name of (72) The actual inventor() of the said invention 1. actual inventor 6

Insert address (74) My/our address for service is k .5 fgi sqryice of rotleln Attorney Al.tralia THESE SECTIONS ARE ONLY TO BE COMPLETED WHERE APPLICABLE: F&rConvention (Only to be used in the case of a Convention application) ApplpbLtions only Details of basic application(s)- 4 4 (31) NUMBER (33) COUNTRY ISO CODE (32) DATE OF APPLICATION

'Fwfurther (Only to be used in the case of a further applicationmade by virtue of SL 'tion 51) applications only (62) Number of original application....

Person by whom

For patents of (Only to be used in the case of an application for a patent of addition) .addition only .dditn I request that the patent may be granted as a patent of addition applied for on Ji: (61) Application Patent in the nam e I request that the term of the patent of addition be the same as that for the main invention or so much of the term of the patent for the main invention as is unexpired.

Insert day, month Dated day 19. ii and year form signed

Signature of applicant or Australian TO: THE COMMISSIONER OF PATENTS attorney This form must be accompanied by either a provisional specification (Form 9 and true copy) or by a complete specification (Form 10 and true copy). Printed by R. D. RUBIE, Commonwealth Government Printer, Canberra i

i

P/00/007 Form 7 Regulation 12(1) COMMONWEALTH OF AUSTRALIA

Patents Act 1952

DECLARATION IN SUPPORT OF AN APPLICATION FOR A PATENT (Delete if inapplicable) In support of the Application made by

for a patent for an invention entitled r

4

do solemnly and sincerely declare as follows:-

11. l am the applicant for the patent. (oi the case of an application by a body corporate)

4he .applicant-for-the-paterit-to mkehis duclaration---eh-af.

*2 1 am the actual inventor of the invention.

(or, where a person other than the inventor is tho applicant)

is-th-e-actuaf-inventor-of-t-he-i nvention-and the facts upon which Iarn/' the is entitled to make the 4 4 9 application are as

Declared a ti A~ uay 9 e.

To: THE COMMISSIONER OF PATENTS

(12) PATENT ABSTRACT (11) Document No. AU-A-42723/89 (19) AUSTRALIAN PATENT OFFICE

(54) Title SAFE-DISPOSABLE HYPODERMIC NEEDLE (SDHN) International Patent Classification(s) 4 (51) A61M 005/32

(21) Application No. 42723/89 (22) Application Date: 10.10.89 (43) Publication Date 26.01.91 (71) Applicant(s) TIBOR KOVACS (72) Inventor(s) TIBOR KOVACS (57) The purpose of this invention is to provide a one use

only, safe disposal hypodermic needle to the medical

profession.

The main advantage of this invention over existing

disposable hypodermic needles is its ability to obviate the

tranumission of contagious diseases in two ways;

a, the "fir tree" device in the system prevents the

syringe being filled twice with medication e.g.

drug addicts cannot share these needles and

b, after one use the needle retracts into the plunger

so that it cannot accidentally harm others e.g.

discarded needles on beaches will not pose a threat

to bathers.

Claim: Indefinite

P/00/o011 Form PATENTS ACT 1952

COMPLETE SPECIFICATION (ORIGINAL) FOR OFFICE USE Short Title: Int. Cl:

42) 7 2 Application Number: Lodged:

Cori~plete Specification-Lodged: Accepted: Lapsed: Published: Priority:

LODGEMNT umNT' Related Art: A) $......Payabbk 4 I 10/ 10/8E9 B) Received D1E10034A Underpaid Q D) Overpaid 'a

0 TO BE COMPLETED BY APPLICANT Narjie of Applicant: Mr. Tibor KOVACS

,re!su4jican ToF 16~ Aitkenvale TONVT~ 4 ~Q nSt. 4814,

Actual Inventor: Mr. Tibor KOVACS Ik(%

'2.t Address for Service: QC v ck

Complete Specification for the inve.-iion entitled: SAFE DISPOSAB3LE HiYPODERMNIC N~EEDLE (SDaN) The following statement is a full description of this invention, including the best method of performing it known to me:- Note: The description is to be typed in double spacing, pica type face, in an area not exceeding 250 mm in depth and 160 mminI width, on tough white paper of good quality and It Is to be Inserted inside this form. 14599/78- L Printed by C J.THOMPSON, Commonwealth Government Printer, Canberr a

I- COMPLETE SPECIFICATION F'OR THE SAFE-DISPOSAL HTPODERMIC NEEDLE

General

The purpose of this invention is to provide a one use

only, safe disposal hypodermic needle to the medical

profession.

©S The main advantage of this invention over existing o 0

disposable hypodermic needles is its ability to obviate the

transmission of contagious diseases in two ways;

a, the "fir tree" device in the system prevents the syringe being filled twice with medication e.g.

drug addicts cannot share these needles and

(14) b, after one use the needle retracts into the plunger 0 o so that it cannot accidentally harm others e.g. discarded needles on beaches will not pose a threat

to bathers. eoo 0

.4"8 Only necessary relative dimensions between the components

are provided. The basic design is equally applicable to any size of hypodermic needle in use now, so overall dimensions

(22) are not appropriate.

I

Page 2

(23) The Description

The safe disposal hypodermic needle comprises the

following four main components;

a, the main drug cylinder, Figure 1 is a cross

sectional drawing of the device,

b, the hypodermic needle and fir tree assembly,

Figure 2 shows the design,

c, the plunger, which forms a cylindrical vacuum oa 0c o chamber after the piston is fitted into it. 0 000 0r 0

0 SFigure 3 shows its cross section and 0i d, the plunger piston, wich incorporates a recess 0

and lock for the fir tree. The piston is also o00

fitted with a deliquescent seal.Figure 4 shows its

cross section.

0 (Y7) The main drug cylinder is essentially the same as any

0 standard syringe currently available with two exeptions.

Firstly, unlike existing designs, the needle is attached to 0

the cylinder from the inside. A needle seat is provided for 0

that purpose see Figure 1 A. The needle seat mates with the needle seal to form a water tight but not permanent joint. 0 0

(43) Secondly, a needle stop is also provided. See Figure 1 B. This not intended to seal at the needle but to prevent the

needle from being pushed out again once it has been

withdrawn into the main cylinder. The plunger backstop, Figure

(47) 1 C, is identical to current designs.

I i i

Y ~L

I m

Page 3 (48) The Fir Tree Needle comprises any standard steel needle

attached to the fir tree device during manufacture. Figure 2

shows the complete assembly. The needle is slightly off set

(Figure 2 D) to ensure it engages the needle stop (Figure 1 B)

in the event re-seating it is attempted after it is retracted.

(53) The fir tree device comprises the ratchet teeth

(Figure 2 the inlet/outlet holes (Figure 2 the needle f* 6 o 0 support (Figure 2 G) and the needle seal (Figure 2 The fir 00 tree is one half of the ratchet system designed to restrict O

movement of the piston in one direction only. The needle g* support is provided to hold the assembly in position inside

the main cylinder. The support is not a seal.

Sealing the assembly into the cylinder is done by

applying a non-toxic deliquescent gasket compound between the 0 4 seal ring (Figure 2 H) and the needle seat (Figure 1 The

fir tree must be 1 2 mm longer than its recess inside the t 0 piston to ensure the inlet holes are not blocked when the

piston is fully depressed onto the fir tree, 0 0)

The Plunger is a simple cylindrical device closed at the

top and fitted with an inner and outer seals at its base.

Figure 3 shows the plunger cross section. The outer seal

(Figure 3 I) provides the watertight seal between the

plunger and the main cylinder. The inner seal (Figure 3 J)

supports the piston and its deliquescent seal during

normal operation of the system. Once the piston is fitted i

Page 4

(73) inside the plunger the base of the two components are flush

with each other. The chamber formed by the plunger and the

piston is then evacuated to form a partial vacuum. The vacuum

is the retraction force for the piston and needle assembly.

The plunger's internal length must be at least as long as

the total length of the needle/fir tree assembly.

(79) The Plunger Piston is designed to be the second half of 00 Of a0 0 the ratchet system with the fir tree mechanism. Figure 4 is o 0 0 0

the cross section of the piston. The recess (Figure 4 K) 00

00 0 in the centre of the piston is 1 2 mm shorter than the 0 n a00 6 a 04

length of the fir tree. The top outer rim of the piston is 0

the vacuum seal (Figure 4 L).

The base of the piston has two features forming parts

I 00 of the needle retraction system. Firstly, the outer rim of 0 0a oa 00o the base (Figure 4 M) is a non-toxic deliquescent seal. It

supports the piston and seals it into the plunger initially.

00 As it is activated by the drug during injection, it acts as

the release mechanism allowing the vacuum to draw the piston C91)) into the plunger. Secondly, the open end of the central recess p 0 has a flexible plastic cone to act as the pawls of the fir

tree ratchet (Figure 4 N).

Method of Operation

The method of operation is illustrated in Figure

Figure 5.1 shows the full assembly in cross section as

supplied by the manufacturer. Note that the plunger/piston

j

.L Page

(98) assembly is fully depressed and the plastic cone on the

piston is pointing towards the needle.

(100) Figure 5.I1 shows the system after the syringe is filled

whith medication. Note, the plunger must be withdrawn

sufficiently for the piston to clear the fir tree.

(103) Figure 5.I11 shows the assembly after the drug has been

injected. Note the plastic cone on the piston has been

reversed during the piston's downward travel. Now the plunger

S cannot be withdrawn again without extracting the needle with o 0

it. Note The 1 2 mm clearance between the plunger and 0. the base of the main cylinder will allow the plunger to be

further depressed, forcing the piston into the plunger and

breaking the seal. The piston and needle assemblies are now

drawn into the plunger by the vacuum.

(112) Should the piston seal not be broken deliberately the drug remnants in contact with the deliquescent seals will .4

soften them. The system is now rendered useless in two ways;

Firstly, the needle is no longer sealed to the main cylinder so that air and drugs leak past the needle seat. Secondly,

the vacuum will draw the piston and needle assembly into the S a*

plunger automatically. Figure 5.IV shows the components' final position. The needle is now shielded and the hypodermic

(120) is ready for safe disposal.

T. KOVACS

DATE: /OC.T/ g9

i r. i: :r

The claims defining the invention are as 1. The Safe Disposal Hypodermic Needle (SDIIN) is the only disposable device restricted to one use only through a mechanical locking system. 2. The $DIM is the only system incorporating the fir-tree locking device. SDHN is the only- device designed to retract its needle inside the main cylinder for safe disposal. 4. The SDHNI system is adaptable to any size of disposable

0 hypodermic needle as Mhe SDTL' is the only device fitted with solub.le,,seals as..a backu iity for safe disposal. 0

Ole

ogo

Dated~ 0 ~,.9cober19 89 TIBOR KOVACS NAME OF APPLICANT (BLOCK LETERS) -Note: If there Isinsufficient space above to type the statement of claim, do not use this sheet, but use separate sheets of paper beginning with the words "The claims defining the Invention are as follows:- and ending with the date and the name of the applicant In block letters.

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