Resources Contact Us Home
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
Cylindrical LED fixture
Lubricant composition
Flexible organic light emitting device and manufacturing method thereof
Techniques for generating and displaying a visual flow of user content through a social network
Semiconductor process
Die packages and systems having the die packages
Power saving methods for wireless systems
  Randomly Featured Patents
Camera storage case
Corn cob mill
Method and system for increasing holographic data storage capacity using irradiance-tailoring element
Methods for the treatment of osteoporosis using bisphosphonates and parathyroid hormone
Corner trim piece
Recombinant hepatitis B surface antigen
Damped railway car suspension
Immersion process for impregnation of resin into preforms
Communication device
Toy tractor