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:
Oct. 20, 2009
Filed:
Jun. 21, 2007
Shunichi Taniguchi, Kanagawa, JP;
Shunichi Taniguchi, Kanagawa, JP;
Tombow Pencil Co., Ltd., Tokyo, JP;
Abstract
A pressurized pen having excellent feeling of using it by allowing an easy knocking operation with small force is disclosed. The pressurizing memberincludes an elastic cylindrical member. The elastic cylindrical memberhas a large-diameter front cylinder portion of which a front endin air-tight manner communicates directly with the rear opening portionof an ink containing tubeand which forms the pressurizing chamber, and a small-diameter rear cylinder portionwhich is coaxially connected to a rear end of the front cylinder portionand in which the front end portionof the pressing memberis pressed into a rear aperturethereof. The inside of the ink containing tubeis pressurized by allowing the pressing memberto press the rear cylinder portioninto the front cylinder portionand compressing the elastic cylindrical memberin the axial direction with the pressing chamberair-tight.