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
Monitoring cloud-runtime operations
Heat transfer label for decorating a metal container
Mirror elements for EUV lithography and production methods therefor
Compounds for the reduction of .beta.-amyloid production
Power converter with a variable reference voltage and inrush current limiting
Comparison of visual information
  Randomly Featured Patents
Image processing method
Tubular body structure marking methods and apparatus
Advance warning traffic safety device
Diaphragm type differential pressure gauge with overpressure relief protection
Ergonomically operating portable humidifier
Coupling device for a motor vehicle fluid circuit
Motorcycle housing exhaust system
Hemostatic media
Biphenyl compounds useful as muscarinic receptor antagonists
Processes for treating a surface of a thermoplastic resin film