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:
Apr. 24, 2012
Filed:
Nov. 29, 2007
Kazuhiko Furukawa, Kanagawa, JP;
Masanobu Kiritake, Kanagawa, JP;
Kengo Nagaoka, Kanagawa, JP;
Mitsubishi Pencil Company Limited, Tokyo, JP;
Abstract
A writing implement is provided including a knock mechanism, in which, without obstruction of normal operation, impact can be cushioned by a damper space that is sealed off from the outside. The writing implement () including the knock mechanism capable of advancing a writing tip () by push-out operation, includes: a holding section () for holding the writing tip (); a shaft tube () for containing the holding section (); a knock section () for covering a rear end portion of the shaft tube (); a push-out section () for pressing the holding section () toward a front end in operative association with push-out operation of the knock section (); and the damper space () provided between the knock section () and the shaft tube (), being sealed off from the outside, and changing its volume by push-out operation of the knock section ().