The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1999
Filed:
May. 13, 1997
Applicant:
Inventors:
Udo Obersteller, Langenhagen, DE;
Bruno Kunzler, Pattensen, DE;
Assignee:
Pelikan GmbH, Hanover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B43K / ; B43K / ;
U.S. Cl.
CPC ...
401230 ; 401119 ; 401151 ; 401232 ;
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.