Writing instrument with refillable reservoir
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United States of America Patent
Stats
-
Mar 30, 1999
Issued Date -
N/A
app pub date -
May 13, 1997
filing date -
Nov 30, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A writing instrument has a supply chamber connected to reserve chamber by a refilling valve actuated by a plunger which is controlled by a push button formed with a self-closing membrane type valve through which the reserve chamber can be filled from a receptacle by a hollow needle. A separating valve at the end of the plunger closes before the refilling valve is opened to ensure that no ink under pressure will be forced into the ink flow regulator and point of the instrument during the refilling process.
First Claim
Family
International Classification(s)
Cited Art Landscape
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