Title of Invention

DISPOSABLE SELF - DESTRUCTIVE SYRINGE

Abstract

The present invention discloses a disposable self-destructive syringe, which belongs to syringes for medical treatment, comprises a needle (1), a tube (2), a injecting piston-rod (3), ratchet grooves (4), a restrictive step (5), an installation opening (6), an anti-return member (7), anti-return prods (8), ratchets (9), a sealing plug (10) and reciprocal motion region (11). The needle is conglutinated on the tube, the injecting piston-rod is arranged in the tube, the anti-return member is arranged in the gap of the injecting piston-rod and in the rear end of the tube, and the sealing plug is arranged in the tube and mounted on the front end of the injecting piston-rod. The syringe is convenient to discharge the inhaled air as sucking medical liquid, begins to be self-destructive after sucking for predetermined amount and can not suck medical liquid again during and after injecting. Further more, the ratchet grooves arranged on the injecting piston-rod can be one or more, which the fewer the number of ratchet grooves, the larger the interval of discharging inhaled air will become. The disposable self-destructive syringe according to the invention of which dose is precise is convenient to operate and will be self-destructive once used.

Full Text

FORM 2 THE PATENTS ACT, 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE SPECIFICATION [See section 10, Rule 13] DISPOSABLE SELF-DESTRUCTIVE SYRINGE; WUXI YUSHOU MEDICAL APPLIANCE LTD. A CORPORATION ORGANIZED AND EXISTING UNDER THE LAWS OF CHINA, WHOSE ADDRESS IS N0. 215, XIGANG ROAD, DONGBEITANG COUNTRY, XISHAN DISTRICT, WUXI CITY, JIANGSU, P.R. CHINA THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED. I Field of the invention The present invention relates to a disposable self-destructive syringe which belongs to syringes for medical treatment. Background art Presently, the disposable sterile syringes widely used in hospitals and medical organizations domestically and abroad don't possess entirely the characteristic of being disposable in respect of their using performance due to their configuration, so they can hi reused after some reset. For example, most of known self-destructive syringes arc designed generally to destruct the sealing of injecting pistons after the medical liquid is fully expelled so that they can be used only once. However, if the injecting piston and injecting piston-rod are not advanced to the final position (i.e, some medical liquid is remained) when using the syringe, the piston can not be destructed and can be reused. In order to solve the above-mentioned problem, China patent application CN03264428.0 filed on 18th June, 2003, the announcement of which is CN2631527, certificate is ZL03264428.0, applicant is Wuxishiyushou medical-appliance Company and designers are Fcugzhong, Wangjunyi and Feijianguo has disclosed a disposable self-destructive syringe comprising ratchet grooves and an anti-return member, wherein said teethed ratchet groove is provided in the entire gap in the injecting piston-rod and said anti-return member is arranged on the rear end of the ratchet grooves, and the :-ratchet grooves and the anti-return member are arranged together in the cylinder(i.e. the housing) of the syringe. When sucking medical liquid, the injecting piston-rod is pulled backward, but the anti-return prods provided on the anti-return member keeps still due to its pressing against the inwall of the cylinder, therefy the ratcher grooves pass the anti-return member. When stating injecting after sucking medical liquid, the anti-return member will be pushed forward together with the injecting piston-rod for being locked by the ratchet groove, and the piston-rod can not be pulled backward again to suck medical liquid because the anti-return member is continuously pressing against the in wall of the tube. thereby realizing the disposable function. But the said syringe has some clinical limitations. The syringe can not completely expel the air inhaled during sucking medical liquid and even may waste medical liquid for having no structure for expeling air. Furthermore, the syringe can not be used as high dose-precision syringe for injecting bacterin and insulin, because of not having taken the remainder of medical liquid into account. In order to overcome the above limitations, the invention provides an improved disposable self-destructive syringe. Brief description of the invention An object of the invention is to provide a disposable self-destructive syringe which can easily discharge the inhaled air during sucking medical liquid and has very little remainder, and more specially, to provide a disposable self-destructive syringe which can perform air discharging action and can not be reused again after having sucked predetermined quantity of medical liquid and injected the same, so as to solve the problem of the prior art. Another object of the invention is to provide a disposable self-destructive syringe which can easily discharge the inhaled air during sucking medical liquid,wherein the self-destructive function comes into effect immediately after predetermined quantity have being sucked , so that it is impossible to suck medical liquid again during and after injecting. Furthermore, the number of ratchet grooves can be set according to the requirements of the clinical applications, wherein the fewer the number of ratchet grooves, the wider the region for reciprocal motion will be and the larger the interval for expelling inhaled air will become. The invention is realized by means of the following description to solve the above said problems: A disposable self-destructive syringe comprises a cylinder on which a injecting needle is bondec; an injecting piston-rod arranged in the cylinder, an anti-retum member arranged in the gap in the injecting piston-rod and positioned in the rear end of the cylinder ;a scaling plug arranged in the cylinder and mounted on the front end of the injecting piston-rod. The disposable si;1f-destructjve syringe as described above is characterized in that one or more ratchet grooves (4) are arranged on the front end of center gap in the injecting piston-rod (3). The disposable self-destructivc syringe as described above is characterized in that a restrictive step (5) is arranged on the rear end of center gap of the injecting piston-rod, and an anti-retum member (7) passes the restrictive step and comes into the cylinder. The disposable self-destructive syringe as described above is characterized in that an installation opening (6) is provided on the latest end of center gap in the injecting piston-rod, The disposable self-destructive syringe as described above is characterized in that a reciprocal motion region (II) is located on the center gap in the injecting piston-rod. The disposable self-destructive syringe as described above is characterized in that. the anti-return member is provided with ratchets (9), and the two sides of the anti-return member are provided with anti-retum prods (8). The anti-retum member is made of spring steel 'sheet. The present invention has following advantages as compared with the prior art disclosed by CK2631527: 1. It is improved in that it has an additional reciprocal motion region (11), in which the injecting piston-rod can reciprocate to suck liquid and expel the inhaled air, which satisfies the clinical requirement; 2. The amount of remainder can be reduced because the needle (1) is bonded on the tube (2) directly, thereby satisfying the rcquerement of injecting bacterin and insulin. The syringe is convenient and reliable and. can be self-destructive once being used. Brief description of the drawings Fig.l. schematically shows the whole construction view of a disposable self-desiructive s;/ringe according to a first embodiment of the invention; Fig.2 is a schematic left side construction view of the syringe in Fig.l; Fig. 3 is a schematic left side construction view of the syringe in Fig.2 with the cylinder being completely filled with the medical liquid; Fig. 4 is a schematic left side construction view of the syringe in Fig.2 when the injecting is completed: Fig. 5 is a schematic left side construction view of the syringe in Fig.2, illustrating a region (11) in which a anti-return member (7) can reciprocate; Fig.6 schematically shows the construction view of a anti-rctum member (7); Fig.7 is a schematic left side construction view of the anti-return member (7) in Fig.6; Fig.8 schematically shows the construction view of a disposable self-destructive syringe according to a second embodiment of the invention; Fig.9 schematically shows the construction view of a disposable self-destructive ^syringe according to a third embodiment of the invention. List of the reference number I needle; 2 cylinder; 3 injecting piston-rod; 4 ratchet groove; 5 restrictive step; 6 installation opening; 7 anti-return member; 8 anti-return prod; 9 ratchet; 10 sealing plug; 11 reciprocal motion region Best modes of carrying out the invention The invention will be described in more detail with reference to the drawings and embodiments. Referring to the drawings, the disposable self-destructive syringe according to the invention comprses a needle 1, a cylinder 2, an injecting piston-rod 3, an anti-return, member 7 and a. scaling plug 10, wherein the injecting piston-rod 3 is provided with ratchet grooves 4, a restrictive step 5, an installation opening 6 and a reciprocal mot: on region 11 (refer to Fig. 1, 2 and 3, respectively), and the anti-retum member 7 is provided with anti-retum prods 8 and ratchets 9. In assembly, the anti-return member 7 enters into the restrictive step 5 through the installation opening 6 with the ratchets 9 being pressed against the restrictive step 5, and then the ir jeering piston-rod 3 is pushed into the bottom of the cylinder 2 together with the scaling plug 10 (as shown in Fig. 1 and 2). In operation, the injecting piston-rod 3 is pulled backward to suck some medical liquid. If air is inhaled before the anti-return member 7 entering into the ratchet grooves 4, the ir haled air can be expelled by means of the reciprocal motion region 1 1 (as shown in Fig.5). When the inhalec air is discharged completely and the medical liquid is sucked once again, the latchet grooves 4 pass the ratchets 9 (as shown in Fig.3). In injection, the sealing plug 10, the injecting piston-rod 3 and the anti-return member 7 are pushed forward together and then the injecting piston-rod 3 can not be pulled backward, because otherwise the anti-return prods 8 will pierce into the inwall of the tube and the injection will end. As said above, now the injecting piston-rod 3 and the scaling plug 10 can never be pulled backward for the same reason relating tc the anti-return prods 8. The other two embodiments (as shown in Fig.8 and 9)are of the same functioning principle. However, the needle is a separate member connected to the cylinder in Fig.8, and the sealing plug and the injecting piston-rod are integrally formed by molding in Fig.9. WE CLAIM 1.. A disposable Self-destructive syringe, comprising: a cylinder on wb.ch a injecting needle is bonded; an injecting piston-rod arranged in the cylinder, an. anti-return member arranged in the gap in the injecting piston-rod and positioned in the rear end of the cylinder; a scaling plug arranged in the cylinder and mounted on the front end of the injecting piston-rod. 2. The disposable self-destructive syringe as describing above characterized in that one or more ratchet grooves (4) are arranged on the front end of center gap in the injecting piston-rod (3). 3. The disposable self-destructive syringe as describing above characterized in that a restrictive step (5) is arranged on the rear end of center gap of the injecting piston-rod, and an anti-return member (7) passes the restrictive step and comes into the cylinder. 4. The disposable self-destructive syringe as describing above characterized in that an installation opening (6) is provided on the latest end of center gap in the injecting piston-rod. 5. The disposable self-destructive syringe as describing above characterized in that a reciprocal motion region (11.) is located on the center gap in the injecting piston-rod. 6. The disposable self-destructive syringe as describing above characterized in that the anti-return number is provided with ratchets (9), and. the two sides of the anti-retum member arc provided with anti-return prods (8). The anti-return member is made of spring steel sheet. Dated this 3rd day of April, 2006 FOR WUXI YUSHOU MEDICAL APPLIANCE LTD. By their Agent (GIRISH VIJAYANAND SHETH) KRISHNA & SAURASTRI Abstract The present invention discloses a disposable self-destructive syringe, which belongs to syringes for medical treatment, comprises a needle (1), a tube (2), a injecting piston-rod (3), ratchet grooves (4), a restrictive step (5), an installation opening (6), an anti-return member (7), anti-return prods (8), ratchets (9), a sealing plug (10) and a reciprocal motion region (11). The needle is conglutinated on the tube, the injecting piston-rod is arranged in the tube, the anti-retum member is arranged in the gap of the injecting piston-rod and in the rear end of the tube, and the sealing plug is arranged in the tube and mounted on the front end of the injecting piston-rod. The syringe is convenient to discharge the inhaled air as sucking medical liquid, begins to be self-destructive after sucking for predetermined amount and can not suck medical liquid again during and after injecting. Furthermore, the ratchet grooves arranged on the injecting piston-rod can be one or mere, which the fewer the number of ratchet grooves, the larger the interval of discharging inhaled air will become. The disposable self-destructive syringe according to the invention of which dose is precise is convenient to operate and will be self-destructive once used.

Documents:

511-MUM-2006-ABSTRACT(27-9-2013).pdf

511-MUM-2006-ABSTRACT(6-1-2012).pdf

511-mum-2006-abstract-1.jpg

511-mum-2006-abstract.pdf

511-MUM-2006-ANNEXURE 1-2(27-9-2013).pdf

511-MUM-2006-CLAIMS(AMENDED)-(27-9-2013).pdf

511-MUM-2006-CLAIMS(AMENDED)-(6-1-2012).pdf

511-mum-2006-claims.pdf

511-mum-2006-correspondance received.pdf

511-MUM-2006-CORRESPONDENCE(12-6-2013).pdf

511-mum-2006-correspondence(18-6-2008).pdf

511-MUM-2006-CORRESPONDENCE(22-3-2013).pdf

511-MUM-2006-CORRESPONDENCE(5-3-2012).pdf

511-MUM-2006-CORRESPONDENCE(6-1-2012).pdf

511-mum-2006-description (complete).pdf

511-MUM-2006-DRAWING(27-9-2013).pdf

511-MUM-2006-DRAWING(6-1-2012).pdf

511-mum-2006-form 1(4-5-2006).pdf

511-MUM-2006-FORM 13(27-9-2013).pdf

511-mum-2006-form 18(14-3-2008).pdf

511-MUM-2006-FORM 2(TITLE PAGE)-(27-9-2013).pdf

511-mum-2006-form 2(title page)-(3-4-2006).pdf

511-MUM-2006-FORM 2(TITLE PAGE)-(6-1-2012).pdf

511-MUM-2006-FORM 26(27-9-2013).pdf

511-MUM-2006-FORM 26(6-1-2012).pdf

511-mum-2006-form 3(18-6-2008).pdf

511-MUM-2006-FORM 3(6-1-2012).pdf

511-MUM-2006-FORM 5(6-1-2012).pdf

511-mum-2006-form-2.doc

511-mum-2006-from1.pdf

511-mum-2006-from2.pdf

511-mum-2006-from3.pdf

511-mum-2006-from5.pdf

511-MUM-2006-MARKED COPY(27-9-2013).pdf

511-MUM-2006-PETITION UNDER RULE 137(6-1-2012).pdf

511-mum-2006-power of attorney(9-5-2006).pdf

511-MUM-2006-REPLY TO EXAMINATION REPORT(6-1-2012).pdf

511-MUM-2006-REPLY TO HEARING(27-9-2013).pdf

511-MUM-2006-SPECIFICATION(AMENDED)-(27-9-2013).pdf

511-MUM-2006-SPECIFICATION(AMENDED)-(6-1-2012).pdf

511-MUM-2006-US DOCUMENT(6-1-2012).pdf