Fisher Space Pen
Writing instruments that function anywhere!
Writes upside down, under water, freezing cold, boiling heat, carbonless paper, latex gloves.
Used by Astronauts, Law Enforcement, Military, Search & Rescue, Coast Guard, EMS, Fire-Fighters, Doctors, Mountain Climbers, Trades, and more...
Space Pen was developed as a result of Fisher's experiments with new ink formulations and method of pressurizing a pen. When astronauts started to explore the reaches of outer-space, Fisher realized that no existing pen could perform in the boiling hot, freezing cold, gravity less void. Fisher designed and patented a pump action AG7 pen that would pressurize a special ink for about 30 seconds of write out so pen could write at any angle or zero gravity. A patent was applied for then granted and the AG7 pens were sent to NASA, tested and approved for use.
Unlike ordinary ball pens which rely on gravity to feed ink, the replaceable refill cartridge of the Space Pen® is pressurized. At nearly 35 pounds per square inch, ink is continuously fed to the tungsten carbide ball, allowing the user to write at any angle, even upside down.