Resources Contact Us Home
Barrel type plunger for use with a needle-retractable safety syringe and the syringe using the same

Image Number 5 for United States Patent #7789855.

The present invention provides an improved barrel type plunger for use with needle-retractable safety syringes. The plunger includes a barrel, a needle retracted trigger and a supporting member. A front portion of the barrel is fitted over a sealing rubber pad, a slotted hole is provided at a wall of the front portion of said barrel, a bearing piece is provided in the slotted hole, and one end of the bearing piece is connected to the front side wall of the slotted hole. The supporting member is releasably engaged in the barrel. After having released from the barrel, the supporting member is able to translate backwards under the action of a needle retraction force so that the bearing piece can be returned to such a position that the needle can be retracted backwards to the interior of the barrel.

  Recently Added Patents
System and method for detecting deadlock in a multithread program
Serving base station selection based on backhaul capability
Method of forming an isolation structure
Process information structuring support method
Keypoint descriptor generation by complex wavelet analysis
Image forming apparatus and job request control method instructed by authenticated users
Closed cell culture system
  Randomly Featured Patents
Septum for use in gas chromatography and method of operation
Fingerless glove
Implantable hemodialysis access device
Cork golf club grip
Zoom lens
Method and system for furrow irrigation
Device for carrying the load of injured soft tissue
Microbial viscosifiers
Lottery number selector
Lawn mower cover