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US 10,300,733 B1Granted
Writing instrument with spool valve
OwnerJoseph D Mareshinventor
Life of this patent
Estimating the term…
Abstract
A writing instrument may include an upper pen barrel rotatably connected to a lower pen barrel. A spool valve and fluid reservoirs may be housed in the upper pen barrel. A writing tip secured to the lower pen barrel may be in selective fluid communication with the fluid reservoirs. The upper pen barrel may be rotatable relative to the lower pen barrel of the writing instrument.
Claims13
A writing instrument, comprising:
- a) an upper pen barrel and a lower pen barrel;
- b) a spool valve connecting said upper pen barrel to said lower barrel;
- c) a writing tip removably secured to a lower distal end of said lower pen barrel;
- d) an ink cartridge removably received in a spool cavity of said spool valve, said ink cartridge including a plurality of ink reservoirs in fluid communication with said writing tip;
- and
- e) said lower pen barrel including an ink pathway port, wherein rotation of said spool valve relative to said lower pen barrel aligns a respective one of said ink reservoirs with said ink pathway port.
3 more elements
Dependencies are inferred from the claim text.