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
Light-emitting device package structure
System and method for measuring an analyte in a sample
Catalysts and process for producing aldehydes
Fan guide
Optical modulator module
Apparatus and method for discharging capacitor of input filter of power supply, and power supply including the apparatus
Terminal box assembly
  Randomly Featured Patents
Isochronous free electron laser
Machine and drive disk for the repair and/or maintenance of floors
Apparatus and method for filling a motor vehicle cooling system with coolant
Bagging apparatus with bag spreading device and braking device
Apparatus, method and system for providing LVS enables together with LVS data
Electronic component cap and seal
Signal receiver using data bit search in alternating time segments
Methods and apparatus for forming diamond-like coatings
Antenna balun