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
Cartridge for separating analyte from mixture, comprising dispensing and receiving chambers and insert
Organic EL display device and method for manufacturing the same
Method of stimulating tissue healing
Elementary network description for efficient link between neuronal models and neuromorphic systems
Storage device, data processing device, registration method, and recording medium
Reuse of static image data from prior image frames to reduce rasterization requirements
System and method for managing self-refresh in a multi-rank memory
  Randomly Featured Patents
Device and method for eliminating feedback common mode signals
Porphycene anti-cancer agents and treatment methods
Routing scanned documents with scanned control sheets
Optical connection device
Transducer structure for generating uniform and focused ultrasonic beams and applications thereof
Vertically installed spar and construction methods
Analog memory system
Acid soluble photo-resist comprising a photosensitive polymer
Stent delivery and deployment method
High-speed non-contact measuring apparatus for gauging the thickness of moving sheet material