Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Hypodermic syringe with selectively retractable needle










Image Number 2 for United States Patent #6679863.

A hypodermic syringe with a selectively retractable includes an elongate barrel having an open proximal end and a distal end that defines a receiver. The syringe has a hollow elongate plunger with an open proximal end and a closed distal end. The syringe has an elongate hub having a passageway therethrough, a distally extending stem, and a proximal flange with an engagement for engaging said barrel. The syringe has an elongate needle having a fluid path therethrough, a sharpened distal end and a proximal end. The needle is mounted in the passageway so that the distal end projects distally outwardly. The syringe has an elongate spring disposed about the stem of the hub that is compressed between the flange and the receiver to provide a bias. There is a hollow sleeve sized to fit within the receiver over the elongate spring with a proximal sharpened end facing the flange. When a user applies a sufficient force, the hub is sufficiently moved distally in the receiver for the cutting edge of the sleeve to cut through the flange and the closed distal end of the plunger to expose the cavity for withdrawal of the needle into the syringe.








 
 
  Recently Added Patents
Use of a high-oleic and high-tocol diet in combination with a non-tocol antioxidant for improving animal meat quality
System for non-destructive image processing
Critical word forwarding with adaptive prediction
Touch screen guitar
Solar power system with communication network utilizing magnetic fields
Compounds, compositions and use
Image forming apparatus and method for making density correction in a low resolution image based on edge determination
  Randomly Featured Patents
Centrifugal sample evaporator with direct-heat shield and uniform heating
Group management control method for elevator system employing traffic flow estimation by fuzzy logic using variable value preferences and decisional priorities
Cooking process
Message testing
Apparatus and method for selectively monitoring multiple voltages in an IC or other electronic chip
Pipe running tool
Optical film, method for producing optical film, optically-compensatory film, polarizing plate and liquid-crystal display device
Folding box construction
Process of and apparatus for treating a fluid
Bidirectional flow meter