Source: http://www.google.com/patents/US5540664?dq=inassignee:Temic
Timestamp: 2016-08-31 05:03:54
Document Index: 196953287

Matched Legal Cases: ['art 172', 'art 174', 'arts 172', 'art 174', 'art 274', 'art 272']

Patent US5540664 - Reloadable automatic or manual emergency injection system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA reloadable automatic or manually usable medicine injection apparatus having a barrel which receives a syringe subassembly. The syringe subassembly includes an ampule for housing fluid medication, a needle, a plunger stopper, and plunger shaft which allow removal and manual use. The injection apparatus...http://www.google.com/patents/US5540664?utm_source=gb-gplus-sharePatent US5540664 - Reloadable automatic or manual emergency injection systemAdvanced Patent SearchPublication numberUS5540664 APublication typeGrantApplication numberUS 08/243,641Publication dateJul 30, 1996Filing dateMay 16, 1994Priority dateMay 27, 1993Fee statusPaidAlso published asCA2163005A1, CA2163005C, DE69429918D1, DE69429918T2, EP0700307A1, EP0700307A4, EP0700307B1, US5665071, WO1994027660A1Publication number08243641, 243641, US 5540664 A, US 5540664A, US-A-5540664, US5540664 A, US5540664AInventorsRonald E. WyrickOriginal AssigneeWashington Biotech CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (29), Referenced by (134), Classifications (25), Legal Events (10) External Links: USPTO, USPTO Assignment, EspacenetReloadable automatic or manual emergency injection system
US 5540664 AAbstract
A reloadable automatic or manually usable medicine injection apparatus having a barrel which receives a syringe subassembly. The syringe subassembly includes an ampule for housing fluid medication, a needle, a plunger stopper, and plunger shaft which allow removal and manual use. The injection apparatus includes a driver for forcing the syringe subassembly to inject the needle and displace fluid medication. The injection apparatus preferably includes a trigger handle, sheath remover, and removable stop system for delivery of multiple doses.
1. A fluid medication injection apparatus comprising:a barrel having a cavity therein; the barrel also having a muzzle end through which the needle passes during injection; a removable cap detachably connected to the muzzle end of the barrel, the removable cap having a needle passageway through which the needle can extend; a syringe subassembly within the barrel and sized to slide within the cavity, the syringe subassembly having an ampule for housing fluid medication, a needle, and a plunger for forcing the fluid medication from the ampule through the needle; a protective sheath provided on the needle; a driver for forcing the syringe subassembly to inject the needle and displace fluid medication through the needle, the driver being movable between a cocked position and extended positions; a driver release for controllably releasing the driver from the cocked position into an extended position; and a sheath remover detachably connected to the removable cap for engaging and removing the protective sheath from the needle. 2. A fluid medication injection apparatus according to claim 1 whereinthe sheath remover is frictionally mounted to slide onto the removable cap. 3. A fluid medication injection apparatus according to claim 1 whereinthe sheath remover has an aperture formed therein which receives and grips the protective sheath for removal. 4. A fluid medication injection apparatus according to claim 1 further comprising a removable stop within the barrel for halting movement of the driver at an extended-position.
5. A fluid medication injection apparatus according to claim 1 further comprising a removable stop within the barrel for halting movement of the driver at an extended position, the removable stop being positioned at least partially around the plunger of the syringe subassembly to limit discharge movement of the plunger.
9. A fluid medication injection apparatus comprising:a barrel having a cavity therein, the barrel having a muzzle end and a proximal end; a syringe subassembly positioned within the barrel and mounted to allow relative slidable motion of the syringe subassembly within the cavity: the syringe subassembly having an ampule for housing fluid medication, a needle, and a plunger for forcing the fluid medication from the ampule through the needle; a driver for forcing the syringe subassembly to inject the needle and displace fluid medication through the needle, the driver being movable between a cocked position and extended positions; a driver release for controllably releasing the driver from the cocked position into an extended position; and a trigger handle connected to activate the driver release, said trigger handle having a sleeve portion which extends along and over substantial portions of the barrel to form a handle which is grasped by a user's hand; said sleeve portion extending 75% of the barrel length and being slidable relative to said barrel: said trigger handle being connected so as to release the driver release when the trigger handle is moved upon the barrel toward the muzzle end. 10. A fluid medication injection apparatus according to claim 9 and further comprising a sheath remover for engaging and removing a protective sheath from the needle.
11. A fluid medication injection apparatus according to claim 9 and further comprising a sheath remover for engaging and removing a protective sheath from the needle; and wherein said trigger handle extends along the barrel to abut the sheath remover when the sheath remover is installed upon said muzzle end.
14. A fluid medication injection apparatus according to claim 9 wherein the trigger handle and barrel are constructed to provide mechanical interengagement which limits both longitudinal and rotational motion of the trigger handle relative to said barrel.
17. A fluid medication injection apparatus according to claim 9 further comprising a removable stop within the barrel for halting movement of the driver at an extended position, the removable stop being positioned at least partially around the plunger.
21. A dual use fluid medication injection apparatus capable of both mechanically powered administration and manual administration of a fluid medication, comprising:a barrel having a cavity therein; a manually usable syringe subassembly positioned within the barrel and sized to slide within the cavity, the syringe subassembly having:an ampule for housing fluid medication; a needle in fluid communication with said ampule; a plunger for forcing the fluid medication from the ampule through the needle; said plunger including a plunger shaft and a plunger portion which extends from the ampule to allow manual depression of the plunger to dispense fluid from the ampule; said barrel including at least a first part and a second part which are manually detachable to allow removal and installation of the syringe subassembly; a driver for forcing the syringe subassembly to inject the needle and displace fluid medication through the needle, the driver being movable between a cocked position and extended positions; said plunger being unattached to said driver to allow removal of said syringe subassembly from the barrel while in cocked or extended positions; a driver release for controllably releasing the driver from the cocked position into an extended position; a sheath remover detachably connected to a muzzle end of the barrel for engaging and removing a protective sheath from the needle; a removable cap detachably connected to the muzzle end of the barrel, the removable cap having a needle passageway through which the needle can extend; and the sheath remover is frictionally mounted to slide onto the removable cap. 22. A dual use fluid medication injection apparatus capable of both mechanically powered administration and manual administration of a fluid medication, comprising:a barrel having a cavity therein; a manually usable syringe subassembly positioned within the barrel and sized to slide within the cavity, the syringe subassembly having:an ampule for housing fluid medication; a needle in fluid communication with said ampule; a plunger for forcing the fluid medication from the ampule through the needle; said plunger including a plunger shaft and a plunger portion which extends from the ampule to allow manual depression of the plunger to dispense fluid from the ampule; said barrel including at least a first part and a second part which are manually detachable to allow removal and installation of the syringe subassembly; a driver for forcing the syringe subassembly to inject the needle and displace fluid medication through the needle, the driver being movable between a cocked position and extended positions; said plunger being unattached to said driver to allow removal of said syringe subassembly from the barrel while in cocked or extended positions; a driver release for controllably releasing the driver from the cocked position into an extended position; a sheath remover detachably connected to a muzzle end of the barrel for engaging and removing a protective sheath from the needle; a removable cap detachably connected to the muzzle end of the barrel; and the sheath remover is detachably connected to the removable cap, the sheath remover having an aperture formed therein which receives and grips the protective sheath for removal. 23. A dual use fluid medication injection apparatus capable of both mechanically powered administration and manual administration of a fluid medication, comprising:a barrel having a cavity therein; a manually usable syringe subassembly positioned within the barrel and sized to slide within the cavity, the syringe subassembly having:an ampule for housing fluid medication; a needle in fluid communication with said ampule; a plunger for forcing the fluid medication from the ampule through the needle; said plunger including a plunger shaft and a plunger portion which extends from the ampule to allow manual depression of the plunger to dispense fluid from the ampule; said barrel including at least a first part and a second part which are manually detachable to allow removal and installation of the syringe subassembly; a driver for forcing the syringe subassembly to inject the needle and displace fluid medication through the needle, the driver being movable between a cocked position and extended positions; said plunger being unattached to said driver to allow removal of said syringe subassembly from the barrel while in cocked or extended positions; a driver release for controllably releasing the driver from the cocked position into an extended position; a trigger handle connected to activate the driver release, said trigger handle having a sleeve portion which extends along and over substantial portions of the barrel to form a handle which is grasped by a user's hand; said sleeve portion extending 75% of the barrel length and being slidable relative to said barrel; said trigger handle being connected so as to release the driver release when the trigger handle is moved upon the barrel toward the muzzle end. 24. A fluid medication injection apparatus according to claim 23 and further comprising a sheath remover for engaging and removing a protective sheath from the needle.
25. A fluid medication injection apparatus according to claim 23 and further comprising a sheath remover for engaging and removing a protective sheath from the needle; and wherein said trigger handle extends along the barrel to abut the sheath remover when the sheath remover is installed upon said muzzle end.
28. A fluid medication injection apparatus according to claim 23 wherein the trigger handle and barrel are constructed to provide mechanical interengagement which limits both longitudinal and rotational motion of the trigger handle relative to said barrel.
31. A fluid medication injection apparatus according to claim 23 further comprising a removable stop within the barrel for halting movement of the driver at an extended position, the removable stop being positioned at least partially around the plunger.
35. A dual use fluid medication injection apparatus capable of both mechanically powered administration and manual administration of a fluid medication, comprising:a barrel having a cavity therein; a manually usable syringe subassembly positioned within the barrel and sized to slide within the cavity, the syringe subassembly having:an ampule for housing fluid medication; a needle in fluid communication with said ampule; a plunger for forcing the fluid medication from the ampule through the needle; said plunger including a plunger shaft and a plunger portion which extends from the ampule to allow manual depression of the plunger to dispense fluid from the ampule; said barrel including at least a first part and a second part which are manually detachable to allow removal and installation of the syringe subassembly; a driver for forcing the syringe subassembly to inject the needle and displace fluid medication through the needle, the driver being movable between a cocked position and extended positions; said plunger being unattached to said driver to allow removal of said syringe subassembly from the barrel while in cocked or extended positions; a driver release for controllably releasing the driver from the cocked position into an extended position; a sheath remover detachably connected to a muzzle end of the barrel for engaging and removing a protective sheath from the needle; a plurality of stops within the barrel for halting movement of the driver. 36. A fluid medication injection apparatus according to claim 35 wherein at least one of said stops being a removable stop.
37. A fluid medication injection apparatus comprising:a barrel having a cavity therein, the barrel having a muzzle end and a proximal end; a syringe subassembly positioned within the barrel and mounted to allow relative slidable motion of the syringe subassembly within the cavity; the syringe subassembly having:an ampule for housing fluid medication; a needle; a plunger for forcing the fluid medication from the ampule through the needle; a plunger shaft connected to said plunger; an adjustable plunger shaft head threadably connected to the plunger shaft for adjustment relative thereto to allow adjustment of the overall length of the ampule; a driver for forcing the syringe subassembly to inject the needle and displace fluid medication through the needle, the driver being movable between a cocked position and extended positions; said driver contacting the adjustable plunger shaft head; a driver release for controllably releasing the driver from the cocked position into an extended position; a plurality of stops within the barrel for halting movement of the driver. 38. A fluid medication injection apparatus according to claim 37 wherein; at least one of said stops is a removable stop.
This is a continuation-in-part application based upon U.S. Pat. application Ser. No. 08/068,644, filed May 27, 1993, now U.S. Pat. No. 5,358,489.
This invention provides an automatic injection apparatus in which the injection apparatus can be loaded just prior to use, or alternatively sold already loaded. The injection apparatus can be loaded with a variety of medications as needed for the particular situation, and can later be reloaded to refreshen the medication or change medications. The apparatus can be reloaded numerous times with cartridges commonly used in hospital inventories so that duplicate inventories are not required and better storage conditions are possible. As individual cartridges are used or the medicine contained therein becomes ineffective, the user simply replaces the cartridge with a new one without disposing of the injector. In this manner, only the inexpensive cartridges are replaced, and not the entire apparatus. This can reduce the costs significantly. Furthermore, the injector allows access and removal of a syringe subassembly by the user. The syringe subassembly can be used to provide a manual injection in the event that the injector or cartridge fails, or in the event that the user simply desires to apply the injection manually. The described system also includes embodiments which have dual dose capability for second dose administration. The second dose can be either automatically injected or manually injected.
FIGS. 2 and 3 show apparatus 10 in more detail. Apparatus 10 is designed to house a replaceable, disposable syringe subassembly 20. A principal component of subassembly 20 is a medicament cartridge 21. Cartridge 21 includes an ampule or medicament container 22 for housing and containing a fluid medication 24. Ampule 22 is preferably a small glass or plastic vial that contains a measured amount of medication. The amount of medication (such as antidotal medicant, antibiotics, epinephrine, insulin, etc.), varies depending upon the medication and anticipated usage conditions. Cartridge 21 also has a hypodermic needle 26 mounted to the distal end of ampule 22 using a needle mounting cap 27. Cartridge 21 further has a fluid tight plunger which includes a stopper 28 which fittingly engages and slides within ampule 22. Stopper 28 is preferably formed of a rubber or elastomer material and has a plunger connector in the form of a mounted peg or threaded extension 29. The plunger connector faces outwardly and as shown extends outwardly from stopper 28. The structure of cartridge 21 is well-known and commercially available. Examples of preferred cartridges of this construction are manufactured under the trademark TUBEX by Wyeth Laboratories, Inc. and under the trademark DOSETTE by Elkins-Sinn.
Sheath 76 covers aperture 74 to prevent contamination of the needle 26. Sheath 76 is preferably formed of a deformable material, such as rubber, which can buckle under the force of drive spring 44 of driver 40 as illustrated in FIG. 3. A flange portion of sheath 76 abuts the inner surface of cap 14 and the head of the sheath is pierced by needle 26 when the syringe subassembly is moved through the barrel by the driver. Cap 14 has a stepped interior surface for accommodating the biasing spring 38 and the flange portion of sheath 76.
Injection apparatus 150 has a modified distal, muzzle end cap 152 which is threadably coupled to muzzle end 72 of barrel 12. Modified end cap 152 is constructed with needle passageway 74 formed therein through which the needle can extend during injection. Apparatus 150 has a protective sheath 154 provided on needle 26. Sheath 154 protects and maintains the sterility of needle 26 and is preferably formed of plastic or rubber. Sheath 154 is sized to fit through needle passageway 74 of end cap 152.
Injector 150 also includes a sheath remover 156 for engaging and removing protective sheath 154 from needle 26. Sheath remover 156 is detachably connected to muzzle end 72 of barrel 12. Preferably, sheath remover 156 comprises a tubular section 158 which is opened at one end and an end wall 160. The tubular section 158 has a diameter at its inner surface that is approximately equal to the diameter of the outer surface of end cap 152 so that sheath remover 156 is frictionally mounted by sliding it onto end cap 152 at muzzle end 72. Other coupling arrangements, such as threaded couplings, are also possible. The sheath remover is preferably formed of a hard, durable material, such as plastic or metal.
FIG. 11 shows injection apparatus 150 stored in a protective carrying case 170 constructed according to a further aspect of this invention. Carrying case 170 is a hollow, substantially tubular assembly sized to hold apparatus 150. Case 170 is made of a front or lower part 172 and a rear or upper part 174. Parts 172 and 174 are manually detachable to allow removal of the injector apparatus 150. The lower part will normally hold the injector after the upper part 174 is removed. The front and rear casing parts have a frictional slide-fit coupling 176 for holding the two parts together in a manually detachable assembly.
The dogs 242 and slots 241 also provide mechanical interengagement between the trigger handle and barrel. More specifically, the engagement prevents excessive longitudinal motion. It further prevents relative rotational motion between the barrel and trigger handle. This anti-rotation capability allows the end cap 152 to be twisted relative to the barrel while holding the trigger handle. This relative twisting is needed to remove and install the end cap relative to the barrel, such as during emergency manual use, or to load and unload the injector. This construction further allows the trigger handle to function more effectively in the capacities of being the manually grasped part through which force is transferred to both insert and withdraw the needle into a person being injected.
FIG. 14 shows that the invention also contemplates a further injector system having a case 270 similar to case 170. Case 270 has an upper or first part 274 which is sized to frictionally engage with a lower or second part 272. Case 270 is shown enclosing injector 200 as shown in FIG. 13. The bottom or lower end is advantageously provided with a tip receptacle 298 which receives the tip of the sheath without appreciable force being exerted upon the sheath. Case 270 is further provided with a tip cushion 299 adjacent to the tip receptacle 298. A case pocket clip 291 is provided to aid in supporting the case in a user's pocket. Case 270 can further include, as desired, additional medicaments, such as tablets 292.
The reloadable injection apparatus of this invention is advantageous because it affords maximum flexibility in that manual or automatic injection of a single or multiple dose of medication can be easily and conveniently administered. The invention also improves reliability because, in the event of mechanical failure with the injector, the user can easily access the syringe subassembly and manually inject the medication. These and other advantages and benefits of the invention are described or apparent from the description given herein.
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