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
Phosphonate compounds
High density molecular memory storage with read and write capabilities
Portable computer
(4929
Profiled rail for advertising/display units
Defect detection system and method
Use of physical deformation during scanning of an object to generate views of the object
  Randomly Featured Patents
Omnidirectional scanning method and apparatus
Recorded magnetization state measuring method and device
Image display apparatus
Apparatus and method for a funnel assembly
Vehicle rollover sensing
Double-acting inflatable seal
Apparatus and method of dispensing liquid crystal
Boat ski tower with adjustable legs
Method of calculating coil pattern, and gradient magnetic field coil
Fabrication of flat-panel display having spacer with rough face for inhibiting secondary electron escape