Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Cancer vaccines containing epitopes of oncofetal antigen
Cellulose derivative and hydrogel thereof
Traffic signal mapping and detection
Computerized on-board system for controlling a train
Architectural panel with natural fossil spade leaf embossed surface
Process of preparing functionalized polymers via enzymatic catalysis
Method for producing semiconductor substrate, semiconductor substrate, method for manufacturing electronic device, and reaction apparatus
  Randomly Featured Patents
Low-noise memory device having a high sampling frequency
Enzymatic oil interesterification
Inlet for an electronic tag
Engine cooling system providing mixed or unmixed head and block cooling
Query speller
Automatic regulating equipment for a heating device having a vaporizing burner
Knitting machine needle with front and back cut-outs and spring
Stimulation electrode selection
Round bale trailer
Micro-lens array substrate and production method therefor, and projection type liquid crystal display unit using those