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:
Jun. 02, 1987
Filed:
Feb. 21, 1985
Hidehei Kageyama, Kawagoe, JP;
Takahiko Suzuki, Kawagoe, JP;
Kotobuki & Co., Ltd., Kyoto, JP;
Abstract
A writing instrument comprises a refill disposed slidably along the axial direction in an outer cylinder, a rotating cam set provided in the vicinity of the rear portion of the refill, a weighting balance placed in the vicinity of cam bar of the rotating cam set, a spring member for energizing rearwards the refill, and a knocking portion for operating the cam bar of the rotating cam set. According to the above construction of the writing instrument, when the writing instrument is shaken with force exceeding a certain level, gravity balance functions to project and retract the refill from the outer cylinder, while the refill may also be projected and retracted by knocking motions of the knocking portion.