Resources Contact Us Home
Safety syringe

Image Number 3 for United States Patent #7799002.

An improved safety hypodermic syringe includes a reciprocal tubular needle sheath disposed on the exterior of the syringe body, a latch mechanism engaging the syringe body and the sheath to latch the sheath in a needle-covering position after delivering contents from the syringe body, and a spring engaging the syringe body and the sheath and expandable to move the sheath to cover the needle point, where the spring is a non-uniform helical spring having multiple turns each turn uniformly spaced from adjacent turns, each turn comprising first and second alternating angled portions, the first of the alternating angled portions being at a first angle to a plane perpendicular to an axis through the center of the helical spring and the second angled portions being at a second lesser angle to the plane perpendicular to the axis.

  Recently Added Patents
Cartridge for conducting a chemical reaction
Mobile device case with storage compartment
Lightweight multicast method and apparatus for data distribution service
Method of treating a preceramic material
Anthranilic diamide compositions for propagle coating
Power conversion device for electric vehicle
Cathode active material and lithium secondary battery comprising the same
  Randomly Featured Patents
System and method for selecting high speed serial signals
Petunia plant named `USTUN34803`
Method and device for monitoring a movement-controlled machine with an electronically commutated drive motor
Printing groups comprising at least two cooperating cylinders and radially movable bearing units
Process for bonding substrates impermeable to water vapor
Modified apoaequorin having increased bioluminescent activity
Powder preparation system for coating powder
Surface configuration of a steam cleaner
System and method to enable subscriber self-activation of wireless data terminals