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:
Jan. 03, 2012
Filed:
Aug. 06, 2007
Hyun-son Yoon, Seoul, KR;
Hyun-Son Yoon, Seoul, KR;
Morris Corporation, Incheon-Shi, KR;
Abstract
A retractable writing instrument having a dryness prevention device is disclosed. The retractable writing instrument includes a casing (), which has a nib hole therein, a cartridge (), which has a nib coupling protrusion for coupling a nib () to a nib extension tube, and a spring for providing elastic restoring force. The writing instrument further includes an Oring member (), which is coupled to the nib extension tube, and an openable ring (), which is rotatably coupled to the Oring member (). When a knock part is pushed, the openable ring () is rotated, such that a through passage is opened, and the nib is protruded outside through the nib hole. When the cartridge is moved backwards, the nib coupling protrusion of the cartridge holds the Oring member and is moved backwards along with the Oring member, thereby rotating the openable ring, thus closing the through passage.