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Safety syringe Patent
 

Safety syringe with retracting needle

A retracting needle safety syringe (2) includes a barrel (4) having a tip (10), to which a needle assembly (28) is mounted, and a plunger (6) including a stem (34) and a piston (40) at the distal end of the stem. The piston has a piston body (46) and a piston seal (58) which engages the barrel inner surface. The piston seal is detached from the piston, the piston body is secured to the tip, and the tip of the barrel is detached from the remainder of the barrel when the plunger is moved to its distal position. Pulling the plunger proximally from the distal position back towards a proximal position causes the piston body, the tip and needle assembly to be pulled into the interior (56) of the barrel, but without the piston seal sliding against the barrel. This retraction can take place manually or automatically.

Disposable safety syringe with retractable shuttle for Wyeth medication cartridge

A disposable safety syringe has a needle shuttle slidably located within a main syringe barrel. The shuttle has a pair of outwardly extending guide tabs which engage a guide slot formed in the barrel wall. The upper end of the needle shuttle is configured to accept a Wyeth needle cartridge having a needle attached to an ampoule by a carrier. A bushing and rod assembly are mounted in the barrel below the ampoule. After use, the needle shuttle is maneuvered downwardly by the guide tabs to a locking position in which the needle attached to the ampoule is housed within the barrel for safe disposal.

Safety syringe for intravenous injection with externally connectable and internally retractable self-biased needle

A safety syringe for intravenous injection, includes: a hollow needle assembly having a hollow needle portion detachably coupled to a shank portion embedded in a sleeve portion eccentrically formed on a syringe and having a needle head portion formed on a rear portion of the shank portion, and a plunger straightly slidably held in the syringe without being rotatable and having a biasing socket eccentrically recessed in the plunger for engaging the needle head portion of the needle assembly for a coupling of the needle assembly with the plunger for a retraction together into the syringe for obliquely biasing the needle portion for preventing re-protrusion of the needle outwardly, thereby allowing a variety of needles of different sizes to be replaceably mounted on the shank portion outside the syringe for a convenient mounting of the needle on the syringe.

Safety syringe with externally connectable and internally retractable self-biased needle

A safety syringe includes: a hollow needle assembly having a hollow needle portion detachably coupled to a shank portion embedded in a sleeve portion of a syringe and having a needle head portion formed on a rear portion of the shank portion, and a plunger slidably held in the syringe and having a biasing socket recessed in the plunger for engaging the needle head portion of the needle assembly for a coupling of the needle assembly with the plunger for a retraction into the syringe for obliquely biasing the needle portion for preventing re-protrusion of the needle outwardly, thereby allowing a variety of needles of different sizes to be replaceably mounted on the shank portion outside the syringe for a convenient mounting of the needle on the syringe.


Auto-disable safety syringe
Universal safety syringe
Safety syringe with retracting needle
Safety syringe having a needle to be retracted and canted within a protective sleeve
Retractable safety syringe with push rod in plunger

PAT. NO. Title
101 5458576 Safety syringe with retracting needle
102 5445620 Disposable safety syringe with retractable shuttle for Wyeth medication cartridge
103 5431632 Safety syringe for intravenous injection with externally connectable and internally retractable self-biased needle
104 5431631 Safety syringe with externally connectable and internally retractable self-biased needle
105 5405327 Simplified safety syringe with retractable self-biased needle and minimized plunger
106 5405326 Disposable safety syringe with retractable shuttle for luer lock needle
107 5374250 Safety syringe
108 5370619 Single-use safety syringe provided with retractile needle and device preventing it from being reused
109 5360410 Safety syringe for mixing two-component medicaments
110 5356395 Safety syringe shield
111 5344403 Simple retractable safety syringe
112 5336186 Safety syringe with displaceable barrel hub
113 5330440 Reverse thread carpule dental safety syringe
114 5328475 Simplified safety syringe with retractable self-biased needle
115 5324265 Hypodermic safety syringe with retracting needle system
116 5318538 Self-locking safety syringe
117 5306258 Safety syringe and method of using same
118 5300040 Self-locking safety syringe
119 5295973 Safety syringe
120 5273541 Safety syringe
121 5273539 Automatically blocked safety syringe adapted for intravenous injection
122 5273538 Automatically blocked safety syringe with greatly unaligned blocking bulb
123 5259841 Safety syringe
124 5256151 Safety syringe with retractible needle holder
125 5242420 Self-locking safety syringe
126 5242402 Safety syringe with retractible self-biased needle adapted for intravenous injection
127 5232458 Safety syringe with retractable self-biased needle
128 5219338 Safety syringe with collapsible needle guard
129 5215533 Safety syringe incorporating vacuum retraction of the needle
130 5201708 Self-locking safety syringe
131 5195973 Self-destructing disposable safety syringe system with piston and plunger joined by weak attachment sealant
132 5190526 Hypodermic safety syringe with retracting needle system
133 5180369 Self destructive safety syringe
134 5163918 Disposable safety syringe
135 5122124 Safety syringe needle device with interchangeable and retractable needle platform
136 5112316 Disposable safety syringe
137 5092852 Safety syringe for single use
138 5088985 Safety syringe
139 5084018 Safety syringe
140 5053010 Safety syringe with retractable needle
141 5049133 Single-use safety syringe
142 5030208 Safety syringe needle device with interchangeable and retractable needle platform
143 4998924 Double sleeve safety syringe
144 4994045 Split sleeve safety syringe
145 4955869 Disposable safety syringe with a hypodermic needle
146 4944723 Universal disposable safety syringe system
147 4941883 Disposable safety syringe
148 4932939 Safety syringe
149 4931040 Safety syringe having a combination needle cannula and articulating hub for retracting said cannula into a medication carpule
150 4908022 Disposable safety syringe having a retractable needle cannula and cannula lock

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