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:
Sep. 28, 2010
Filed:
Oct. 15, 2008
Hirotake Izawa, Yokohama, JP;
Takeshi Kobayashi, Yokohama, JP;
Kyo Nakayama, Yokohama, JP;
Mitsubishi Pencil Co., Ltd., Tokyo, JP;
Abstract
A chuck () for grasping a writing lead and a rotor () arranged to be movable in a direction of rotation and an axial direction within a body cylinder (). A rotational drive mechanism for the writing lead is formed such that first and second cam faces () and () are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces () and () are arranged on the body cylinder side to face the above-mentioned first and second cam faces respectively. An indicator () of a wedge-shaped notch is formed at a part of the rotor. The indicator can be observed through the body cylinder made of a transparent material. By this structure, a mechanical pencil is provided in which operation of the writing lead that is gradually rotated by way of writing pressure can be known certainly.