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
Detection and use of low molecular-weight modulators of the cold-menthol receptor TRPM8
Receiver and transmitter receiver system
Method for culturing lactic acid bacterium and method for producing fermented milk
Device and method for quantizing and inverse quantizing LPC filters in a super-frame
Selective high frequency spinal cord modulation for inhibiting pain with reduced side effects, and associated systems and methods
Switching element for a valve train of an internal combustion engine
System and method for reducing antivirus false positives
  Randomly Featured Patents
Method for operating a cellular telecommunications network, and method for operating a personal cellular telecommunications device
Itemized receipt tracking system
Fishing pole holder
Self-contained obstruction marker
Monolithic programmable signal processor using PI-FET taps
Propanolol antigen conjugates and antibodies
Wireless antenna array system architecture and methods to achieve 3D beam coverage
Xerocolography tandem architectures for high speed color printing
Nickel oxide-hydrogen cell
Convertible bag assembly