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
Method and apparatus for automatically controlling gas pressure for a plasma cutter
Compact semiconductor memory device having reduced number of contacts, methods of operating and methods of making
Promoting content
Image forming apparatus and control method therefor
Flexible pouch
Method for treating wounds for mammals, wound healer compound, and method of manufacturing thereof
Method and apparatus for compensating QoS during handover by base station in wireless broadband access system
  Randomly Featured Patents
Modular energy absorber and method for configuring same
Disposable fluid handling cassette
Multi-output type DC/DC converter with a constant on time interval in a steady state
Oscillator system with switched-capacitor network and method for generating a precision time reference
Precise sleep timer using a low-cost and low-accuracy clock
Adaptive traffic shaping for wireless communication systems
Inhibition of interaction of PSD93 and PSD95 with nNOS and NMDA receptors
Film with random color filter array
Polyurethane resin moulding for vehicle interior part and method of manufacturing the same
Pull-out guide assembly for drawers